It may be that the machine is fooled. Who first noticed this "phenomenon" ? a machine tuner or an aural tuner? But if the machine is erring, then two different machines would probably give two different readings. If so then you would want to see if 3 diff machines give 3 diff readings. I would like to see the machine register low for 3 strings and THEN hear how the beats sound. In Virgil's class in Chicago, hands were raised for both, "who can hear the difference" "who cannot hear the difference." If you give a blindfold test to more than 3 tuners I believe you will get a "can't hear a difference". So set up the tests and lets find out . ---ric ps re the talk about "modes" of the sb, then don't forget about "modes" of the microphone or pickup device of the machine. We all know the ear can be fooled. (Echo, slow beats caused by a fan, hum of lighting, false string, slightly false string, loose bridge pin, loose agraffe, bends in the wire, and so on and so on how bout beats from sub sonic vibrations of the building caused by traffic?) My limited understanding of how tuning machines work, some sample in cycles. Maybe that cycle is a harmonic of a particular frequency the machine is trying to measure. Maybe that doesn't matter. What ever, it is a probably a problem of machines a skeptic aural tuner says. ----- Original Message ----- From: Joseph Garrett <joegarrett@earthlink.net> To: <pianotech@ptg.org> Sent: Tuesday, August 13, 2002 3:49 PM Subject: Unison Flatter than each Individual string? > I have seen the phenomenon of two/three strings being "flatter" then each, > individually. And, I accept Dr. Sanderson's explanation of the reason for > the effect, more or less. However, I have also seen a reverse phenomenon of > the unison being "sharper" then the individual strings! Would someone like > to advance a theory on this???? > Best Regards, > Joe Garrett, RPT, (Oregon)
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