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U1 a couple of issues for your advice
#3031054 10/01/20 05:40 PM
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I have a Yamaha U1 and when I push the pedal down the felt things that mute the strings come off the strings, but they come off in such a way that there's an audible vibration in the strings. Basically they rub against the strings ever so slightly. Is that normal?

I put this in a YouTube video: https://www.youtube.com/watch?v=D8lQ4njZDSo

What you will also notice in the video is that there's a louder sound made by the pedal itself (felts rubbing against each other). How does that get fixed?

As an unrelated issue, when playing certain keys, I feel the vibration of the string through the key. I'm inclined to blame it on the piano as a whole, but it happens more with some keys than others. Is that to be expected? Is it an issue with the action, or even a string tuning issue? Or maybe not an issue at all?

Re: U1 a couple of issues for your advice
Viridium #3031071 10/01/20 06:39 PM
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Acoustic pianos generate string vibrations that digital pianos do not. There are multiple reasons for noise from the damper pedal use. Without being there in person, I can’t tell for sure what the solutions should be. Your best bet is to have a piano technician to come and identify the sources of the noises and come up with the fixes. Most of them are quick and inexpensive unless the damper felts are tough from age and need to be replaced.

Re: U1 a couple of issues for your advice
Viridium #3031356 10/02/20 02:07 PM
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I just don't want to bother the technician for something that's to be expected. The video shows the amount of vibration—it's pretty clearly audible.
https://www.youtube.com/watch?v=D8lQ4njZDSo (reshared for completeness)

Also some keys create shadow buzzing sounds in the piano, and I'm wondering whether those qualify for the technician to repair:
https://www.youtube.com/watch?v=wh6LnT2FoQ8
https://www.youtube.com/watch?v=ikLtoLv00-c (view of the felts from above, though I don't think the shadow noise is distinguishable here)

The piano is under warranty, but I'd like to know beforehand what is reasonable to ask to have repaired and what is normal to expect in a piano.

Re: U1 a couple of issues for your advice
Viridium #3031377 10/02/20 03:52 PM
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After watching all 3 videos I would say:
1) Call for a "warranty" repair on the pedal/dampers. There's obviously SOMETHING not right.
2) Regarding the extraneous string noise, if you can do it, hold the damper away from an offending note and play the note. If you don't hear the extraneous sound, you, at least have eliminated the damper rubbing against the string as a potential source for that sound.

Is it "normal" to have some swoosh noise when the dampers lift from the strings?

Yes, and no. Ideally, no. Yes can come through use of lesser quality materials in the dampers as well as the need for adjustments. Better pianos have better dampers. Listening to your video, even done with extraneous noise from your cellphone, I would agree that the amount of noise you hear is excessive.

My opinion.


Andrew Kraus, Pianist
Educated Amateur Tuner/Technician
I Make Music that Lifts People Up & Brings Them Together
Rockville, MD USA
www.AndrewKraus.com
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Twitter at @IAmAPianist

1929 Steinert 6'10" (Close copy of New York S&S "B")

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