Pianotech

  • 1.  Thank you Dan Levitan?

    Registered Piano Technician
    Posted 11-02-2017 22:20
    I had an interesting experience today with an elderly client with a S&S model L. My client is 92 and her piano has been her faithful and treasured companion since the 1970's. Our own Rick Butler put hammers and shanks on it in the early 90's before the piano and the family moved to South Florida around the turn of the century. After my last visit she called to say that the treble had gone out of tune very quickly. I went by today to see what I could see and found the instrument pretty well in tune and entirely consistent with the way I have tuned it for the past 10 years or more.  Mrs.W said that it was all perfectly fine except that the top two octaves sounded flat. I did all my interval checks and it was if anything a bit sharper that I would normally leave it. This was bad news. I've had a number of clients all serious musicians who suddenly after the age of 85 or more lose the ability to discern pitch above F6 or so. The first client I had with this problem heard the notes 100 cent flat of where they actually were. Today's client wasn't that far off. Still, I needed to come up with a solution that would let her hear the music the way she expected to hear it and yet still sound musical to anyone she might play for. Hence the title for this thread. Dan Levitan has been teaching a class on the indispensable 9th partial and though I couldn't make it to his class in St Louis I have been playing around with using the ninth partial as an aural check in the 6th and 7th octaves ever since the convention. From what I understand his approach is to listen to contiguous 23rds ( triple octave plus a whole tone ) which normally beat 4-5 times a second in that range to check for even progression. In my case I needed to tune really sharp but wanted to have some objective standard for the area I was stretching. So I fired up the trusty Sanderson tool and starting at C6 I set the note to measure the fundamental of the note I was tuning and then measured the ninth partial of the note a M23rd below. I then tuned the note in question to be pure with the ninth partial. It ended up 10 -20 cents north of what I would usually do. The octaves were beating 5-8 time per second but when actually playing the piano it really wasn't that noticeable. Mrs. W sat down and played a Grieg Nocturno ( at 92!) that had been really bothering her and in seconds her face lit up and she said "now it sounds right".  She then confessed that she hadn't held much hope that I could do anything about it once she realized that her hearing had changed. And she would have been right if not for this little organization of ours and it's ability to transmit an idea from a person in New York to another person in Florida. An idea that even when used not as intended could help someone continue to experience the joy of music. So thanks Mr. Levitan and I hope you'll pardon the mis-use. Has anyone else had elderly clients suddenly start hearing the top octaves wildly flat?

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    Karl Roeder
    Pompano Beach FL
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  • 2.  RE: Thank you Dan Levitan?

    Registered Piano Technician
    Posted 11-02-2017 23:09
    Yes - and I will try this.
    Thanks, Nancy Salmon
                LaVale, MD





  • 3.  RE: Thank you Dan Levitan?

    Registered Piano Technician
    Posted 11-02-2017 23:29
    Am I correct that when you set the 9th partial of the measured note to be zero beats does that you were expanding a normally contracted interval? I just checked this on my piano and I definitely hear the beats you mention. Very cool test. Thanks.

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    Geoff Sykes, RPT
    Los Angeles CA
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  • 4.  RE: Thank you Dan Levitan?

    Registered Piano Technician
    Posted 11-03-2017 07:51
    Mr Sykes,
    I'm not sure it's so much that we normally contract the 23rds as much as that the ninth partial of a note a M23 lower than the note we're tuning is about 10 or 20 cents sharp of the second partial of the note an 8ve below.

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    Karl Roeder
    Pompano Beach FL
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  • 5.  RE: Thank you Dan Levitan?

    Registered Piano Technician
    Posted 11-03-2017 20:47

    Am I correct that when you set the 9th partial of the measured note to be zero beats does that you were expanding a normally contracted interval? I just checked this on my piano and I definitely hear the beats you mention. Very cool test. Thanks.
    Geoff Sykes,  11-02-2017 23:28
    Narrow and wide intervals are not involved in this situation. These are created by the Comma of Pythagoras. What Carl is doing is tuning a 9:1 "triple octave", similar to using a P12 (3:1) to "tune an octave". (I once got into trouble in the PTJ, calling the P12 and octave. NO, it most certainly is not an octave relationship, but if it's used to transfer the temperament to the outer octaves, it doing octave duty. I remarked at the time that if Reagan's Dept. of Agriculture deemed ketchup a vegetable, then school hot lunch programs could put bottles of ketchup on the tables and thus be delivering a vegetable.)

    What's behind Karl's use of this is the stretching of all the other intervals below the 9:1 (i.e., 2:1, 3:1, 4:1, 5:1 6:1, on up). Dan Levitan has a wonderful metric for determining the inherent stretch of any interval, before the inharmonicity of the notes in the interval is ever applied.

    That is:
    [(partial# on lower note)^2] — [(partial# on upper)^2] 

    This is because of the way inharmonicity for each note in the interval is entered as a factor in the stretch of an interval (on a particular piano, for 2 given notes). The stretch from the mathematically pure partial, due to a note's inharmonicity, equals:
    [(inharmonicity coefficient of that note)]*[(the partial #)^2] 

    To simplify the comparison of the inherent stretch in intervals, Dan simply lets the inharmonicity coefficient = 1 . Actual coefficients can be plugged in anytime you want, but they are a complication to this comparison. Dan calls these Expansion Units. They are explained on p.73 of  "The Craft of Piano Tuning", along with a table of EU's for common intervals used in tuning

    So the stretch of a 2:1 single octave is 2^2 - 1^2, or 4-1, or 3.
    The double octave is 15; the P12, 8; and the 6:3 octave is 27. Karl's 9:1 "octave" is a whopping 80.

    So that's what Karl is doing, inducing a stretch on the 6th and 7th octaves of the piano,  by basing them on the high partials of notes 3 octaves below.

    But in satisfying this customer, it might have been possible to find the stretch of this 9:1 "triple octave" compared to his SAT octave settings and used that stretch for the rest of the notes above that.






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    William Ballard RPT
    WBPS
    Saxtons River VT
    802-869-9107

    "Our lives contain a thousand springs
    and dies if one be gone
    Strange that a harp of a thousand strings
    should keep in tune so long."
    ...........Dr. Watts, "The Continental Harmony,1774
    +++++++++++++++++++++
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  • 6.  RE: Thank you Dan Levitan?

    Posted 11-03-2017 04:12
    Yes, a similar experience yet different scenario. In recent years I have been tuning several S & S B’s in client’s homes in rural Virginia all of similar age, eighties and early 90’s. I have used the SAT III for temperment single string pitch, and aurally tuning all unisons over the years with great results for their musical enjoyment. I got a call back last week from one of them who conveyed her displeasure at my recent tuning. When I returned, she told me both her and her friend, a retired violinist from the Houston symphony were unhappy with how the piano sounded at their last get together. I ran my fingers up and down, and agreed, it sounded bad. I retuned using my hybrid skills and she was happy once again as she played a Chopin Nocturne for me. She told me that since her husband had passed away, her piano now was everything to her. I profusely apologized for the poor tuning I had left her with at the last visit, wondering what happened. I left her as she finished up preparations for an afternoon recital of one of her students.
    When I talked to my wife about it, who accompanies me on many of my rural drives to clients, she mentioned the discussion we had about the ragweed in the area the week before that without having taken my meds, was causing an allergic reaction affecting my sinuses including ear blockage. It was the unisons that I had tuned at that time that sounded perfectly fine that had caused the displeasure of my client, not the SAT III.
    I am sorry I missed Dan Levitan’s class. Yesterday I did my first tuning on an antique Steinway upright using his new tuning lever for uprights. Like his lever for grands, a remarkable tool. The PTG instructors and their innovations in the industry continue to amaze me.

    Sent from my iPad




  • 7.  RE: Thank you Dan Levitan?

    Registered Piano Technician
    Posted 11-03-2017 21:30
    Yes, Karl, I've experienced this too many times with elderly clients, especially those with hearing aids.  I'm sure there are lots of us with similar stories in Florida and other retirement areas.  I look forward to using this information Mr. Levitan has given us very soon, since there is such a need.  Thanks for forwarding it to the group.
    My worst experience was with a man aged 104, one DMA and former professor of music who was still writing music in his last days, using his eighty year old little Chickering Quarter Grand (original everything), and still driving too (yikes!).  He wasn't happy with the top octave until I tuned everything in octave seven almost an half step high.  Ridiculous.  I really couldn't leave it like that, so I brought it down to where I could accept it so that others who came to play the piano would not be wondering what kind of fool tuned this piano last.   I think that when notes tuned too high at the top are used melodically it can pass better than when used in harmony, and I think that's how he heard the pitches up there (?)  But it was still awful. 
    Also with the older ears we frequently hear the comment that "those last notes really don't play, do they", since all they hear is the percussive sound of wood/felt hitting metal, and no musical tone. 
    Chuck Christus
    Flagler Beach, FL

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    Chuck Christus
    Flagler Beach, FL
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