Hi Ron, I see I just acted like a politian and answer the question I wanted you to ask rather than the one you *did* ask, My contention is that in doing pitch corrections the added tension on the hitch pin causes the plate to deform and that the pitch correction is more significant from this than from the change in the soundboard. My *hint* for this is tuning pianos that have individually tied strings. Pitch correction percentage is considerably smaller for such instruments. This is not quite the same topic as unison smear. But it is where I got the idea that the plate is very much involved in that result. I don't think that lessor pianos use less stable wooden parts but my gut feeling is that they do use thinner plates that maybe less well supported. Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. Tuner for the Saskatchewan Centre of the Arts drose@dlcwest.com http://donrose.htmlplanet.com/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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