---------------------- multipart/alternative attachment In a message dated 12/18/2005 4:15:04 PM Eastern Standard Time,=20 robert.scott@tunelab-world.com writes: Ric, it's not magic. When struck, the string starts out vibrating only in=20 the up and down direction. But it quickly precesses into an elliptical path= , as=20 described by Peter Weinbreck's articles in the 1970=E2=80=99s, and perhaps e= ven=20 earlier. Since the string is vibrating both up-and-down and right-and-left,= the=20 termination point must be viewed separately in both axes. If the terminatio= n=20 point is the same for all directions of vibration, then all is well, and eve= ry=20 vibration is at the same pitch. But if the termination point for up-and-dow= n=20 motion is different than the termination point for right-and-left motion, th= en=20 these two motions will occur at different pitches, hence the false beat=20 between them. When a bridge pin is loose, it does not resist right-and-left= motion=20 as well as the bridge cap resists up-and-down motion. Therefore the=20 right-and-left vibration effective speaking length is slightly longer than t= he=20 up-and-down effective speaking length. This is consistent w! ith the =20 observations of performing the screwdriver test for loose pins. Robert Scott Ypsilanti, Michigan _______________________________________________ Greetings, This explaination is excellent! Thank you! Happy Holidays Julie Gottshall, Reading, PA ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/86/37/dd/63/attachment.htm ---------------------- multipart/alternative attachment--
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