<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.6000.16608" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><STRONG><FONT face=Arial>Yes I saw the bit about a self tuning guitar.</FONT></STRONG></DIV> <DIV><STRONG><FONT face=Arial>There was some talk a while back about a self tuning piano, done with an electric current. </FONT></STRONG></DIV> <DIV><STRONG><FONT face=Arial>I haven't heard about it for a while.</FONT></STRONG></DIV> <DIV><STRONG><FONT face=Arial>I wonder if it went by the wayside?</FONT></STRONG></DIV> <DIV><STRONG><FONT face=Arial>The company had something to do with QRS, I think.</FONT></STRONG></DIV> <DIV>John Ross<BR>Windsor, Nova Scotia, Canada<BR><A href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</A></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">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=imatunr@srvinet.com href="mailto:imatunr@srvinet.com">Joe And Penny Goss</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech List</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, March 29, 2008 6:15 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Math/Physics Problem: degrees of rotation of tuning pin =howmuchpitch change</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial size=2>Hi John,</FONT></DIV> <DIV><FONT face=Arial size=2>My attitude also, but not for the guy that is working on the self tuning piano.</FONT></DIV> <DIV><FONT face=Arial size=2>Did you know that there is now a self tuning guitar?</FONT></DIV> <DIV><FONT face=Arial size=2>Only 234 strings give or take 30 to go <g></FONT></DIV> <DIV>Joe Goss RPT<BR>Mother Goose Tools<BR><A href="mailto:imatunr@srvinet.com">imatunr@srvinet.com</A><BR><A href="http://www.mothergoosetools.com">www.mothergoosetools.com</A></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">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=jrpiano@win.eastlink.ca href="mailto:jrpiano@win.eastlink.ca">John Ross</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech List</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, March 29, 2008 1:09 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Math/Physics Problem: degrees of rotation of tuning pin = howmuchpitch change</DIV> <DIV><BR></DIV> <DIV><STRONG><FONT face=Arial>I would wonder, why, with all the variables, would you be interested?</FONT></STRONG></DIV> <DIV><STRONG><FONT face=Arial>It can obviously be done, but to what end?</FONT></STRONG></DIV> <DIV>John Ross<BR>Windsor, Nova Scotia, Canada<BR><A href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</A></DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 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=fortefile@gmail.com href="mailto:fortefile@gmail.com">kurt baxter</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech List</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, March 29, 2008 3:04 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Math/Physics Problem: degrees of rotation of tuning pin = how muchpitch change</DIV> <DIV><BR></DIV>Ok, I asked this on a previous thread, but I think the question got buried.<BR>How would one calculate the pitch change implied by a given degree of rotation of a tuning pin?<BR><BR>The know factors would be: <BR><BR>string length <BR>string thickness<BR>tuning pin diameter (and therefore radius) <BR><BR>With those factors known, is it possible to calculate the exact rotational movement (in fractions of a degree)<BR>required to make a pitch change of say, 1 hertz at the note middle C?<BR><BR>(this is a impractical theoretical calculation- ignoring, for the moment, and factor of friction)<BR><BR>Anyone out there better at math than me?<BR><BR><BR>[kurt]<BR><BR></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>