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From: Patent Tactics, George Brock-Nannestad Hello Don [Tait], you wrote: > The late Andy Karzas, who had absolute pitch, said the records play at > 77.56 rpm. > - alas, absolute pitch is worthless unless you know what his mother's piano was tuned to. In other words, an RPM is no good without a reference pitch, typically for a or c. If you have a number of records pitched by the late Andy Karzas, we may determine his internal reference by measuring up the records. I have tried to fit 77.56 into the discrete RPMs you get from a 60 Hz mains with a suitable number of bars in the stroboscope: it does not quite fit the one lower than 78.26, which would be 77.42. So his incredible precision must have been obtained in a different way. Personally, I would have thought 76 rpm would be the correct speed. Kind regards, George