On Thursday, August 07, 2008 12:57 PM, Trey Bunn wrote:

> The tricky part was determining exactly how much to pitch 
> shift the imported sound to make it sound like 78rpm again 
> (up 15 semitones, in case anyone else is curious).

14.78 semitones (33.33 to 78.26 RPM)
14.72 semitones (33.33 to 78.00 RPM)

The human ear can detect pitch differences as small as 
8 cents (or 0.08 semitones), so precision does matter.

Since I make this calculation regularly, I've created a 
simple Excel spreadsheet for computing pitch shifts.

Feel free to email me privately if you'd like a copy of
the spreadsheet.

Eric Jacobs

The Audio Archive, Inc.
Tel: 408.221.2128
Fax: 408.549.9867
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