<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=US-ASCII"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body bgcolor=white lang=EN-US link=blue vlink=blue> <div class=Section1> When a device (speaker, amplifier etc.) produces distortion in the form of harmonics, it is call “harmonic distortion”. It is the most common form of distortion in audio.   Jerry Cohen NJ Chapter   -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of John Ross Sent: Monday, August 23, 2004 12:29 PM To: dporritt@mail.smu.edu; Pianotech Subject: Re: Tuning with a fork [fork partials]   <div> Hi David, </div> <div>   </div> <div> I realize that. </div> <div>   </div> <div> However, I don't think the distortion could be considered an harmonic, which is what the question asked. </div> <div>   </div> <div> John </div> <div> John M. Ross Windsor, Nova Scotia, Canada <a href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</a> </div> <blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt; margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'> <div> ----- Original Message ----- </div> <div style='font-color:black'> From: <a href="mailto:dporritt@mail.smu.edu" title="dporritt@mail.smu.edu">David M. Porritt</a> </div> <div> To: <a href="mailto:pianotech@ptg.org" title="pianotech@ptg.org">pianotech@ptg.org</a> </div> <div> Sent: Monday, August 23, 2004 1:15 PM </div> <div> Subject: Re: Tuning with a fork [fork partials] </div> <div>   </div> John:   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.   dave __________________________________________ David M. Porritt, RPT Meadows School of the Arts Southern Methodist University Dallas, TX 75275 <a href="mailto:dporritt@mail.smu.edu">dporritt@mail.smu.edu</a>   ----- Original message ----------------------------------------> From: John Ross <<a href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</a>> To: Pianotech <<a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a>> Received: Mon, 23 Aug 2004 13:02:28 -0300 Subject: Re: Tuning with a fork [fork partials] Hi, <div> Al Sanderson told me that the Accu-Fork, gave a pure tone, with no harmonics. </div> <div> Regards, </div> <div> John M. Ross Windsor, Nova Scotia, Canada <a href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</a> </div> <blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt; margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'> <div> ----- Original Message ----- </div> <div style='font-color:black'> From: <a href="mailto:BobDavis88@aol.com" title="BobDavis88@aol.com">BobDavis88@aol.com</a> </div> <div> To: <a href="mailto:pianotech@ptg.org" title="pianotech@ptg.org">pianotech@ptg.org</a> </div> <div> Sent: Monday, August 23, 2004 12:55 PM </div> <div> Subject: Re: Tuning with a fork [fork partials] </div> <div>   </div> <div> <div> Joe Goss writes: </div> <blockquote style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt; margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt'> To check your accu fork open the battery compartment and look for a little white plastic slot ( 1/8" at the most ). </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> </div> </body> </html>