I have three knotty problems that I'm hoping someone can advise me on.
Firstly, I have a '72 u1 Yamaha. I've taught myself to tune it over the last few years, and am very happy with the results. It has a nice sounding bass section, the copper on the strings looks really new. The bass I can get sounding really fine! However, the three stringed notes in the mid/upper registers are proving impossible to get 100% in tune. I'm a professional string player of over 30 years, so my ears are spot on, moreover, my computer tuner shows graphically what I can already hear. The final pitch produced after much fiddling is a whining, ringing noise which sounds in the high frequencies. I wouldn't describe it as a beat, but it may be a slow, harmonic distortion of some kind. By muting out one of the three strings, usually I can cancel the effect, but never, however much I tune the instrument, can I get it to disappear .I had the piano looked at by two piano tuners. Both made a great job of tuning it, a professional job, but the ringing effect remained. One tuner told me to just get used to it. But its a horrible bell like overtone that rings through the middle of the piano. I wonder if someone once changed the bass strings, but not the treble section. Do my aural sensations bear out any familiarity to anyone?
Secondly, I would add that someone in past has driven 6 screws in the treble side of the soundboard. I'm wondering why this might be?
My third and last question is to do with dampers, they make a scratching noise as they pull away from the string. Again, the tuner said to get used to it. It only happens in the D-Eb in the lower-mid (where the dampers have two wedge shapes, i.e they are not flat). Can this be fixed?
Thanks to any that reply!
- Colin Nicholson
- Executive Poster
- Posts: 1839
- Joined: 04 Jul 2010, 19:15
- Location: Morpeth, Northumberland
Damper felt has probably hardened (sometimes due to moisture, then drying out) - again, replace the offending felts & backing cloth.
Have you tried manipulating the damper felts a bit? That can help. I did that a couple of days ago to one on a bass string and now it damps like the others.
More generally, have you done any basic servicing and regulation?
I'd suggest you put up a photograph or two of the six screws in the soundboard.