Pianotech

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

May not be anything that has to do with the parts so far being discussed. Have you checked for loose screws? A common one that I find is the guide hole mounted inside the rim on the right side that holds the pin in the lid to prevent it from moving around when closed. (Sorry, don't know the name for that part.) Three mounting screws that are frequently overlooked. Also, things like all those tiny screws in the lid hinge and the possibility that it could simply be the front part of the lid vibrating against the back part when opened and lying flat. Doesn't take much of a warp for that to start vibrating. Could also be key upstop or rest rail nuts that are loose. Plus any assortment of action part screws. None of these have to be more than a tiny bit loose to cause rattles when the humidity is off.

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

What brand and model is the piano ?  I had a Petrof grand here that had a buzz that would come and go. The problem turned out to be the lid lock mechanical parts inside the stretcher. Painting on some liquid rubber electrical tape fixed it. In another unusual case travelling paper on flanges had not been torn flush and certain frequencies caused the paper to vibrate. No joke. I believe that piano was a Feurich grand owned by a teacher. The sound was making her insane

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

What brand and model is the piano ?  I had a Petrof grand here that had a buzz that would come and go. The problem turned out to be the lid lock mechanical parts inside the stretcher. Painting on some liquid rubber electrical tape fixed it. In another unusual case travelling paper on flanges had not been torn flush and certain frequencies caused the paper to vibrate. No joke. I believe that piano was a Feurich grand owned by a teacher. The sound was making her insane

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

That lid lock idea is diabolical! Pressing down on the plunger should give some indication. I once had a buzz on a YC that was the stretcher itself, there were two plate screws that secured it in middle section that fixed the buzz when tightened.

------------------------------
Steven Rosenthal RPT
Honolulu HI
(808) 521-7129

Original Message:
Sent: 02-01-2024 17:25
From: James Kelly
Subject: Mystery buzz - any suggestions?

What brand and model is the piano ?  I had a Petrof grand here that had a buzz that would come and go. The problem turned out to be the lid lock mechanical parts inside the stretcher. Painting on some liquid rubber electrical tape fixed it. In another unusual case travelling paper on flanges had not been torn flush and certain frequencies caused the paper to vibrate. No joke. I believe that piano was a Feurich grand owned by a teacher. The sound was making her insane

------------------------------
James Kelly
Owner- Fur Elise Piano Service
Pawleys Island SC
(843) 325-4357

Original Message:
Sent: 02-01-2024 15:28
From: John Zeiner
Subject: Mystery buzz - any suggestions?

Original Message:
Sent: 2/1/2024 11:30:00 AM
From: Amanda Casanova
Subject: Mystery buzz - any suggestions?

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

------------------------------
Amanda Casanova, Associate
Ivory52
New Richmond, WI
651-253-3792
------------------------------

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

I had a buzz the professor and I searched for. We checked lamps and room fixtures. Couldn't find it. Later the prof thought it came from the leg. He wrapped some felt around the right castor and that was it. Amazing that with the weight it rattled. Isn't there a rod that goes up through the leg on some grands? I think that was it.

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

For the sake of efficiency best to have one person play the offender while you go around touching everything. Usually when you put your hand a rattler it stops. Then you know you found it.  Very difficult to do it alone. 

Peter Grey Piano Doctor 

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Peter mentioned something about a loose emblem on the plate. Schimmel had an anniversary grand with a special emblem on the plate . oNLY 250 PIANOS WHERE MADE THAT YEAR THE STARTING SERIAL NUMBER WAS 25000. tHE sCHIMMEL HERE WAS ONE OF THE 250. tHERE MAY ALSO BE SOMETHING GLUED ON THE INSIDE OF THE RIM. fINALLY SOMEONE MENTIONED THEY FOUND A BUZZ COMING FROM THE BRASS COVERING AT THE BASE OF A LEG  JUST ABOVE THE CASTER.

For the sake of efficiency best to have one person play the offender while you go around touching everything. Usually when you put your hand a rattler it stops. Then you know you found it.  Very difficult to do it alone. 

Peter Grey Piano Doctor 

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Interestingly, I just checked with the tech involved with that piano that had the emblem buzz. It WAS A SCHIMMEL! 

Peter Grey Piano Doctor 

Peter mentioned something about a loose emblem on the plate. Schimmel had an anniversary grand with a special emblem on the plate . oNLY 250 PIANOS WHERE MADE THAT YEAR THE STARTING SERIAL NUMBER WAS 25000. tHE sCHIMMEL HERE WAS ONE OF THE 250. tHERE MAY ALSO BE SOMETHING GLUED ON THE INSIDE OF THE RIM. fINALLY SOMEONE MENTIONED THEY FOUND A BUZZ COMING FROM THE BRASS COVERING AT THE BASE OF A LEG  JUST ABOVE THE CASTER.

For the sake of efficiency best to have one person play the offender while you go around touching everything. Usually when you put your hand a rattler it stops. Then you know you found it.  Very difficult to do it alone. 

Peter Grey Piano Doctor 

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

I also repaired exactly the same type of buzz on a Schimmel grand from 2007. The problem appeard 4 years later.

It was a round decoration on one of the plate holes. I thought it was part of the casting, and not a separate piece, so it was very difficult to find.

Interestingly, I just checked with the tech involved with that piano that had the emblem buzz. It WAS A SCHIMMEL! 

Peter Grey Piano Doctor 

Peter mentioned something about a loose emblem on the plate. Schimmel had an anniversary grand with a special emblem on the plate . oNLY 250 PIANOS WHERE MADE THAT YEAR THE STARTING SERIAL NUMBER WAS 25000. tHE sCHIMMEL HERE WAS ONE OF THE 250. tHERE MAY ALSO BE SOMETHING GLUED ON THE INSIDE OF THE RIM. fINALLY SOMEONE MENTIONED THEY FOUND A BUZZ COMING FROM THE BRASS COVERING AT THE BASE OF A LEG  JUST ABOVE THE CASTER.

For the sake of efficiency best to have one person play the offender while you go around touching everything. Usually when you put your hand a rattler it stops. Then you know you found it.  Very difficult to do it alone. 

Peter Grey Piano Doctor 

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

here is a picture of the Schimmel Plate Emblem

I also repaired exactly the same type of buzz on a Schimmel grand from 2007. The problem appeard 4 years later.

It was a round decoration on one of the plate holes. I thought it was part of the casting, and not a separate piece, so it was very difficult to find.

Interestingly, I just checked with the tech involved with that piano that had the emblem buzz. It WAS A SCHIMMEL! 

Peter Grey Piano Doctor 

Peter mentioned something about a loose emblem on the plate. Schimmel had an anniversary grand with a special emblem on the plate . oNLY 250 PIANOS WHERE MADE THAT YEAR THE STARTING SERIAL NUMBER WAS 25000. tHE sCHIMMEL HERE WAS ONE OF THE 250. tHERE MAY ALSO BE SOMETHING GLUED ON THE INSIDE OF THE RIM. fINALLY SOMEONE MENTIONED THEY FOUND A BUZZ COMING FROM THE BRASS COVERING AT THE BASE OF A LEG  JUST ABOVE THE CASTER.

For the sake of efficiency best to have one person play the offender while you go around touching everything. Usually when you put your hand a rattler it stops. Then you know you found it.  Very difficult to do it alone. 

Peter Grey Piano Doctor 

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Here to second Peter Grey's suggestion of having the customer play the offending notes while you go around touching everything. I start with the big stuff. Grab and hold the lid, lid prop, fallboard, lyre, humidifier, chandelier, wall, windows, etc. If anything stops the buzz, experiment more with that and see what you have to grab to reproduce it. The last difficult buzz I had, I was under the piano pressing on different parts of the sound board and ribs with my hand while the customer played the note. I found that if I pressed on one section it stopped the buzz. It ended up being some excess hardened glue in a gap where the soundboard was glued to the rim. I cut it off with a knife and the buzz went away. But none of this works if the piano isn't buzzing when you're there. 

Another strategy I often use is knocking on stuff with my knuckles. Similar to knocking on a wall to find studs, you're giving it a sharp rap and listening for changes in the sound. If you knock on the soundboard and it's a nice clean hollow sound, you're good. If you knock and there's a click to the sound, investigate further. Knocking on ribs is a good way to see if one is separating slightly. You'll get a "crack" as the gap in the wood closes from the force of your knock. Knocking on the bottom of a soundboard can help you find a coin hiding under the plate because the coin jumps a little when you knock in the right place. Knocking on the lid could help you find a loose hinge screw. You get the point. 

I also try to categorize the "timbre" of buzzes in my mind. I like to think that I can tell the difference between metal on metal, metal on wood, and wood on wood. At least sometimes. If I hear metal on metal, I look for things like damper wires on strings, pedal rods with worn away rubber bushings, loose casters, etc. The other categories are trickier. 

Good luck, and remember to update us when you find the buzz :-)

here is a picture of the Schimmel Plate Emblem

I also repaired exactly the same type of buzz on a Schimmel grand from 2007. The problem appeard 4 years later.

It was a round decoration on one of the plate holes. I thought it was part of the casting, and not a separate piece, so it was very difficult to find.

Interestingly, I just checked with the tech involved with that piano that had the emblem buzz. It WAS A SCHIMMEL! 

Peter Grey Piano Doctor 

Peter mentioned something about a loose emblem on the plate. Schimmel had an anniversary grand with a special emblem on the plate . oNLY 250 PIANOS WHERE MADE THAT YEAR THE STARTING SERIAL NUMBER WAS 25000. tHE sCHIMMEL HERE WAS ONE OF THE 250. tHERE MAY ALSO BE SOMETHING GLUED ON THE INSIDE OF THE RIM. fINALLY SOMEONE MENTIONED THEY FOUND A BUZZ COMING FROM THE BRASS COVERING AT THE BASE OF A LEG  JUST ABOVE THE CASTER.

For the sake of efficiency best to have one person play the offender while you go around touching everything. Usually when you put your hand a rattler it stops. Then you know you found it.  Very difficult to do it alone. 

Peter Grey Piano Doctor 

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda

Here to second Peter Grey's suggestion of having the customer play the offending notes while you go around touching everything. I start with the big stuff. Grab and hold the lid, lid prop, fallboard, lyre, humidifier, chandelier, wall, windows, etc. If anything stops the buzz, experiment more with that and see what you have to grab to reproduce it. The last difficult buzz I had, I was under the piano pressing on different parts of the sound board and ribs with my hand while the customer played the note. I found that if I pressed on one section it stopped the buzz. It ended up being some excess hardened glue in a gap where the soundboard was glued to the rim. I cut it off with a knife and the buzz went away. But none of this works if the piano isn't buzzing when you're there. 

Another strategy I often use is knocking on stuff with my knuckles. Similar to knocking on a wall to find studs, you're giving it a sharp rap and listening for changes in the sound. If you knock on the soundboard and it's a nice clean hollow sound, you're good. If you knock and there's a click to the sound, investigate further. Knocking on ribs is a good way to see if one is separating slightly. You'll get a "crack" as the gap in the wood closes from the force of your knock. Knocking on the bottom of a soundboard can help you find a coin hiding under the plate because the coin jumps a little when you knock in the right place. Knocking on the lid could help you find a loose hinge screw. You get the point. 

I also try to categorize the "timbre" of buzzes in my mind. I like to think that I can tell the difference between metal on metal, metal on wood, and wood on wood. At least sometimes. If I hear metal on metal, I look for things like damper wires on strings, pedal rods with worn away rubber bushings, loose casters, etc. The other categories are trickier. 

Good luck, and remember to update us when you find the buzz :-)

here is a picture of the Schimmel Plate Emblem

I also repaired exactly the same type of buzz on a Schimmel grand from 2007. The problem appeard 4 years later.

It was a round decoration on one of the plate holes. I thought it was part of the casting, and not a separate piece, so it was very difficult to find.

Interestingly, I just checked with the tech involved with that piano that had the emblem buzz. It WAS A SCHIMMEL! 

Peter Grey Piano Doctor 

Peter mentioned something about a loose emblem on the plate. Schimmel had an anniversary grand with a special emblem on the plate . oNLY 250 PIANOS WHERE MADE THAT YEAR THE STARTING SERIAL NUMBER WAS 25000. tHE sCHIMMEL HERE WAS ONE OF THE 250. tHERE MAY ALSO BE SOMETHING GLUED ON THE INSIDE OF THE RIM. fINALLY SOMEONE MENTIONED THEY FOUND A BUZZ COMING FROM THE BRASS COVERING AT THE BASE OF A LEG  JUST ABOVE THE CASTER.

For the sake of efficiency best to have one person play the offender while you go around touching everything. Usually when you put your hand a rattler it stops. Then you know you found it.  Very difficult to do it alone. 

Peter Grey Piano Doctor 

The response on my question has been so insightful!!!  Thank you all so much for your thoughts on this!!

The piano that I'm troubleshooting is a Schimmel grand from the mid 1970's.  It has a semi-ornate case with shaped legs, detailing on the front of the case and scroll work trim on the outside of the rim. (I did not think to check any of the scrolling yet to see if it has loose glue joints - I will be).  The buzzing was coming from 3-4 notes around the tenor break, they were not consecutive notes, and I didn't have the foresight to write down which notes they were exactly since I thought I'd see the piano in person the next day.  I only got to hear the buzzing over a video phone call, so trying to navigate the client around the piano was tricky but that was why I agreed to see it in person the next day so I could do it myself. Now the buzzing is coming from a couple of notes above middle C in addition to the original notes.  It seems to be totally dependent on the day.  I live about an hour 30 from this piano so it's not like I can quick pop over the day it's happening.  I actually have an inspection scope I plan to run under the plate to see if I can see anything - finally an excuse to use it! lol

I plan to go through your list of suggestions until I discover this buzzing.  The most daunting thing to me is how on earth do I narrow down variables so I can hopefully catch this buzzing in person?! Not having a humidity/temp signature pattern and feeling totally random is probably the most difficult part of the problem...

I'll be sure to let you all know what it is when I finally make the discovery!

Amanda

Everyone has given such great suggestions! 

I had a client two days ago who had the same problem. The buzz comes and goes, and it happens on many notes. There was brass and glass all around the room.

Yes, it did turn out to be a pencil that was hidden under the plate. I don't know how it got there.

As Benjamin said: My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet.

Amanda, did you look everywhere under the plate with a small mirror and bright light?

Paul

Hi Amanda,

Thanks for all the details. I have two questions for you. First, what brand of piano (and model if applicable) is it? Second, do you know which section of notes causes it when it happens?

My initial thoughts are that it could be an object stuck under the plate. I know you said you've checked and double checked for objects, but I would give that one more try, maybe with a magnet. Paper clips are notorious buzz-causers.

If it's happening in the treble ranges, it might be something stuck near the V-bar.

If it's in the damper range, it could be a misaligned (or missing) damper guide rail bushing. 

It could also be a synthetic buzz with something in the room. If there are other instruments, picture frames, windows, ceramic pieces, or a host of other things nearby, any one of them could be the culprit.

I wish you luck in your hunt. Finding clicks and squeaks is relatively easy. Buzzes are about the hardest sounds to track down. 

Hello,

I need the assistance of the hive to try to diagnose a mystery buzz in a grand.  This buzzing sounds classically like a pen/pencil is sitting on the strings when you depress the key and the hammer strikes the strings.  After full inspection of the soundboard, bridges, plate, dampers and back action I have yet to replicate the sound or find any foreign objects in the piano; no noticeable cracks in the bridges. This mystery buzz comes and goes seemingly on a whim.  I thought that would be a good indication that it was due to humidity/temp fluctuations.  This piano has a dampp-chaser on it.  The client says they monitor the temp/humidity regularly and it's not changing much.  The only theory I've managed to come up with is that potential swings in the weather create a perfect combination which possibly creates enough flux in the soundboard/damper guide rail that somehow the damper wires might make contact with the string when the key is pressed. 

Just as quick as the buzzing starts, it seems to remedy itself.  The original night they called when I witnessed the buzzing, I could not find a cause over the phone.  I arrived next morning (approx 12-14 hrs later) to inspect closer only the buzzing was no longer happening and nothing we did would cause any buzzing.  The damper wires were where they were supposed to be and were clearing the strings fine.  The client was good for a month and a half without issue and is now in contact again saying more notes are starting to do this buzzing this time above middle C in addition to the original tenor notes....What do you guys think?  Any suggestions? 

Thank you!!

Amanda