<!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 6.00.2800.1106" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #ffffff" bgColor=#ffffff> <DIV><STRONG><FONT size=3>Hi David,</FONT></STRONG></DIV> <DIV><STRONG><FONT size=3></FONT></STRONG> </DIV> <DIV><STRONG><FONT size=3>I realize that.</FONT></STRONG></DIV> <DIV> </DIV> <DIV><STRONG><FONT size=3>However, I don't think the distortion could be considered an harmonic, which is what the question asked.</FONT></STRONG></DIV> <DIV><STRONG><FONT size=3></FONT></STRONG> </DIV> <DIV><STRONG><FONT size=3>John</FONT></STRONG></DIV> <DIV>John M. 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=dporritt@mail.smu.edu href="mailto:dporritt@mail.smu.edu">David M. Porritt</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> Monday, August 23, 2004 1:15 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Tuning with a fork [fork partials]</DIV> <DIV><BR></DIV> <DIV align=left><STRONG><FONT size=3></FONT></STRONG>John:</DIV> <DIV align=left> </DIV> <DIV align=left>I'm sure that the Accufork and TuneLab both produce a sine wave.  Howver, unless you have a very capable speaker there is going to be distortion there and partials added.  It takes quite a good speaker to reproduce a 440Hz sine wave with no distortion.</DIV> <DIV align=left> </DIV> <DIV align=left>dave</DIV><STRONG><FONT size=3> <DIV align=left><BR>__________________________________________</DIV> <DIV align=left>David M. Porritt, RPT</DIV> <DIV align=left>Meadows School of the Arts</DIV> <DIV align=left>Southern Methodist University</DIV> <DIV align=left>Dallas, TX 75275</DIV> <DIV align=left><A href="mailto:dporritt@mail.smu.edu">dporritt@mail.smu.edu</A></DIV> <DIV align=left> </DIV> <DIV align=left><BR>----- Original message ----------------------------------------><BR>From: John Ross <<A href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</A>><BR>To: Pianotech <<A href="mailto:pianotech@ptg.org">pianotech@ptg.org</A>><BR>Received: Mon, 23 Aug 2004 13:02:28 -0300<BR>Subject: Re: Tuning with a fork [fork partials]</FONT></STRONG></DIV> <DIV align=left><STRONG><FONT size=3><BR>Hi,</FONT></STRONG></DIV> <DIV><STRONG><FONT size=3>Al Sanderson told me that the Accu-Fork, gave a pure tone, with no harmonics.</FONT></STRONG></DIV> <DIV><STRONG><FONT size=3>Regards,</FONT></STRONG></DIV> <DIV>John M. 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=BobDavis88@aol.com href="mailto:BobDavis88@aol.com">BobDavis88@aol.com</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> Monday, August 23, 2004 12:55 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Tuning with a fork [fork partials]</DIV> <DIV><BR></DIV> <DIV> <DIV>Joe Goss writes:</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT face=Arial>To check your accu fork open the battery compartment and look for a little<BR>white plastic slot ( 1/8" at the most ). </FONT></BLOCKQUOTE></DIV> <DIV>Hello Joe,</DIV> <DIV> </DIV> <DIV>Thanks for the info. I didn't make myself clear. My AccuFork is right on pitch. What I was wondering about was if the harmonic content of a newer unit was any different from the partial-rich output of mine.</DIV> <DIV> </DIV> <DIV>Thanks for the reply,</DIV> <DIV>Bob Davis</DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>