In the case of the Auer discs, they are violin solos of works in
established keys and would not have been transposed. So, match the known
key (yes, yes, possible variations of A=440, etc. etc.)
On Wed, Feb 8, 2012 at 2:12 PM, George Brock-Nannestad <[log in to unmask]>wrote:
> 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
> 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
> one lower than 78.26, which would be 77.42. So his incredible precision
> have been obtained in a different way.
> Personally, I would have thought 76 rpm would be the correct speed.
> Kind regards,
Dennis D. Rooney
303 W. 66th Street, 9HE
New York, NY 10023