---------------------- multipart/alternative attachment In a message dated 9/22/2004 11:49:24 AM Pacific Standard Time, pianotech88@yahoo.com writes: Now, how exactly do you tune the fourth partial of the lower octave note to the second partial of the upper octave note? I have heard that some techs just tune the octave 1/2 a beat wide, and leave it at that. Visually, by setting your ETD on A5, playing A4 and zeroing the tuner by "stopping the lights" or whatever. Then play A3. If the lights are still stopped, you have a 4:2 octave, since A3 and A4 match at A5, the 4:2 coincidence (4th partial of A3, 2nd of A4). Aurally, by tuning so that the beat rate of F3-A3 = beat rate of F3-A4 (third-tenth test). What's happening is that F3 is producing its fifth partial at A5. It happens to be lower than the A5 produced by A3 and A4, so it will beat against them. If it beats the same against both, they are producing a 4:2 octave. Bob Davis ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/de/82/ea/53/attachment.htm ---------------------- multipart/alternative attachment--
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