<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD><TITLE>Re: Helmholtz and Steinway</TITLE> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <STYLE type=text/css>BLOCKQUOTE { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } DL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } UL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } OL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } LI { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } </STYLE> <META content="MSHTML 5.50.4134.600" name=GENERATOR></HEAD> <BODY bgColor=#ffffff> <DIV><FONT color=#000080></FONT> </DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=JD@Pianomaker.co.uk = href="mailto:JD@Pianomaker.co.uk">John Delacour</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> November 19, 2001 1:30 = PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Helmholtz and = Steinway</DIV> <DIV><FONT color=#000080></FONT><FONT color=#000080></FONT><FONT color=#000080></FONT><BR></DIV> <DIV><FONT color=#000080></FONT> </DIV> <BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"> <DIV><FONT color=#000080>Sigh. Now you've gone and done it! I'm = going to have to build a mono-chord and test a bunch of stuff I'm really not interested in right now. But I am curious.</FONT></DIV></BLOCKQUOTE> <DIV><FONT color=#000080></FONT> </DIV> <DIV><FONT color=#000080></FONT> </DIV> <DIV><FONT color=#000080></FONT> </DIV> <DIV>Have you, Del, or you Ron O, ever allowed longitudinal wave considerations to affect your scale calculations?  I think we = should be told.</DIV> <DIV> </DIV> <BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"> <DIV><FONT color=#000080>And why is that? </FONT></DIV> <DIV><FONT color=#000080></FONT> </DIV> <DIV><FONT color=#000080>Let's just say I worked with the concepts = some while at Baldwin. The scales I worked on then ended up without = SyncroTone scaling. The concepts are perfectly valid. Using Mr Conklin's = techniques you are, indeed, able to design bass strings that control the = longitudinal mode harmonics of the speaking length and cause them to fall on a = harmonic that is not dissident. However, to do so requires making some rather wild = note-to-note jumps in both core wire diameter and wrap wire diameter = that makes it impossible to maintain a smooth tension, power and = inharmonicity curves. The variations in acoustical power and tone color were more noticeable and more objectionable than were the odd longitudinal = mode harmonics.</FONT></DIV> <DIV><FONT color=#000080></FONT> </DIV> <DIV><FONT color=#000080>In the side by side tests we did, nearly = everybody preferred the tone performance of the bass string scaling that did = not use SyncroTone scaling techniques but did maintain smooth tension, power and inharmonicity sweeps. </FONT></DIV> <DIV><FONT color=#000080></FONT> </DIV> <DIV><FONT color=#000080>Del</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>