<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD><TITLE>Message</TITLE> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1491" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Verdana>Since nobody that knows what they are talking = about have chimed in, I'll stick my neck out. I wouldn't think there would be a = whole lot of difference between the two. The wood will want to change dimensions = the same amount for a given change in relative humidity. </FONT></DIV> <DIV><FONT face=Verdana></FONT> </DIV> <DIV><FONT face=Verdana>That being said, seems like there is some = logic to think the more crowned board might react more than the flat one (flat one = expand a little, but just crush rather than bow out) - but that is just baseless speculation on my part. Although I think I've heard the observation that = an old flat soundboard will yield more stable pitch than a newer crowned board = - but that might be where the old board has lots of compression damage = and cracks are simply closing and opening (and not affecting crown as much) in = response to humidity changes (again more pure speculation on my part).</FONT></DIV> <DIV><FONT face=Verdana></FONT> </DIV> <DIV><FONT face=Verdana>Terry Farrell</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">Oh, I only mentioned it because it = surprised me since youse guys that are rebuilding gurus seem to discuss the subject = so much and from so many angles.</DIV> <DIV> </DIV> <DIV>What about that stability thing? Do you think high crowned pianos = are more sensitive to humidity, staying-in-tune-wise?<BR></DIV> <DIV>Alan R. Barnard</DIV> <DIV>Salem, MO</DIV></BLOCKQUOTE></BODY></HTML>