<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 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=purple> <div class=Section1> I am thinking about a research project hopefully resulting in an article, to get interaction from piano technicians about  such concepts as, “coupled motion”  “para inharmonicity”, “longitudinal vibration” (did you really understand that article in PTJ?), “reverse well”, “well temperament”, and why the 3 string unison is flat from the first string tuned. I forget what they call that but I have a tuning machine that shows it isn’t true.   To understand this article I would to hear from technicians who do understand it.  <a href="http://www.speech.kth.se/music/5_lectures/weinreic/strings.html">http://www.speech.kth.se/music/5_lectures/weinreic/strings.html</a>       “It is interesting to note parenthetically the rather complicated beat structure in Figs. 5 and 6, which is not precisely the same for the vibration and the sound. Presumably, the discrepancy comes from the horizontal modes, which contribute to the sound but not to the vertical motion.”     One glaring issue with the graphs in above, the data he presents comes 10 seconds after the note sounds.    If a mention of coupled motion in the above article could you point me to it?  What does it say about the first 3 seconds of sound?             My first impression of the articles was it was an inquiry and suggestion about how someone might think about how to muddle about trying to synthesize a piano sound for electronic keyboards.        ---rmoody     -----Original Message----- From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On Behalf Of Richard Brekne Sent: Monday, June 11, 2007 4:24 AM To: caut@ptg.org Subject: [CAUT] coupled motion and other myths   If Richard has some kind of topical data, documentation, rationale etc to back up any of this I would like to of course see it.  But I rather doubt it. Cheers RicB </div> </body> </html>