Hi Folks - I am a non-professional but enjoy DIY music projects and this is my first post so my apologies if this subject has been previously addressed on the forum. And my apology in advance for possibly using incorrect terminology.
I recently acquired a used Yamaha U1R, SN 3472585 and the piano exhibits a problem that I would like to pose to the members to benefit from their experience and advice.
The tone of two adjacent notes, #26 and #27, are "softer, muted or less bright" than the adjacent notes and the rest of the scale.
After examining the hammers and mutes I removed the action and plucked the strings and the difference in tone was still very distinct. This was true for each string in the pair. I then inspected the length of each of the strings from the tuning block to the bridge and hitch pins. I couldn't find any dust or felt that would the muting. The finish on the strings is consistent and clean across their lengths with no signs of corrosion. There is no rattle or sound that might indicate a loose outer winding. And finally I checked the contact between the bridge and soundboard which seems to be fine.
Now all of this evaluation has been done by an inexperienced piano tech, or an experienced piano hack (depending on your perspective), me. So I could have easily missed a detail due to lack of knowledge and that's why I wanted to leverage this group of experts.
From my perspective having checked the items listed, I can only conclude that these individual strings have gone "dead". The fact that it is four individual adjacent strings out of the total string set does make me question that conclusion though.
I would appreciate any observations and recommendations. All the best. - Ed
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allen ed
byb
windermere FL
407-353-6242
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