>> Hi Sid, >> Obviously, something is moving, but why does it have to be the plate >> flexing? > >Sorry, didn't mean to impy that here...hope I didn't seem inflexible... No, not at all. I don't type so pretty fast, so I might tend to sound terse even if I'm not aggravated about something. It was a fine observation. >Makes all kinds of sense. But in the case where after a couple of weeks the >unisons are better than I expect and the pitch has dropped most in the mid >treble always assumed that the board and maybe the entire structure was >moving around. That mid treble drop might very well be the board. With the curve of the bridge, the bearing leverage is a little different there, and the killer octave is haunted anyway. Then again, tuning certain makes of pianos (I notice it most on Yamahas), I find that after pulling a string up over about six cents, it will drop quite a bit if I whack it. I have always thought that was the string rendering through the bridge in that area, since I couldn't account for it any other way. Perhaps that's the area of the scale where the back scale becomes long enough compared to the front scale for this to make a big difference. I don't really know, but it seemed plausible at the time. >Don't mean to harp on this subject, I'm just thinking about >all the variables involved in predicting, for the customer's benefit, when >to plan on a follow-up tuning. No problem. Harp away. There are a lot of these little curses that we have to deal with out in the field with no official answer as to what causes them or what can be done about them. The folks that come up with these answers are us, and we can't work things out without a little haggling over the details. We have to try to sort the probables from the imponderables somehow. Ron N
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