<html><head></head><body bgcolor="#FFFFFF"><div>Wim,</div><div><br></div><div>The pin is the conductor through which current is sent to each individual string, so the string itself is heated and thereby made to go flatter. The plate is the ground plane that returns the used current to the other pole of the source. But there is something lacking in the resolution of the measuring device if what I heard is as close as it can get. "To the nearest cent" is not close enough. </div><div><br></div><div>Hear also C5 and G5 in the background music of the demo video. This guy may be a fine engineer (I wouldn't know), but  he's no judge of a tuning. Doesn't he have an editor?<br><br>~ Mark Schecter</div><div><br>On Jan 25, 2012, at 12:39 PM, <a href="mailto:tnrwim@aol.com">tnrwim@aol.com</a> wrote:<br><br></div><div></div><blockquote type="cite"><div><font color="black" size="2" face="Arial, Helvetica, sans-serif"> <div><font face="Arial, Helvetica, sans-serif">This was around several years ago. I think Kent Swafford wrote something about this. Even invited the man to a chapter meeting. </font></div> <div> </div> <div>Besides the inharmonicity problems associated with each piano, a pin couldn't possibly heat up or cool down enough to make a pitch change of more than just a few cents. . <br> Obviously there are many "what if" factors, the least of which is a loose pin block.</div> <div> </div> <div>A nice idea, but the cost of the unit and installation might be more than having the piano tuned by a "real" piano tuner.</div> <div> </div> <div>Wim<br> </div> <div style="CLEAR: both"> <div> </div> </div> <br> <br> <div style="FONT-FAMILY: arial,helvetica; COLOR: black; FONT-SIZE: 10pt">-----Original Message-----<br> From: David Boyce <<a href="mailto:David@piano.plus.com">David@piano.plus.com</a>><br> To: pianotech <<a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><br> Sent: Wed, Jan 25, 2012 9:32 am<br> Subject: [pianotech] Self-tuning piano<br> <br> <div id="AOLMsgPart_1_6b31fafe-5ab1-4826-9105-d934efa1dfcf"><font face="Arial">Erk! Is this the way forward?  <a class="moz-txt-link-freetext" href="http://www.youtube.com/watch?v=ugAxXm2SAXw" target="_blank">http://www.youtube.com/watch?v=ugAxXm2SAXw</a><br> <br> Best regards,<br> <br> David.<br> </font></div> </div> </font></div></blockquote></body></html>