[78-L] Record playing speed ^

[AllenAmet at aol.com]

In a message dated 12/3/2008 12:14:49 P.M. Eastern Standard Time,  
mbiel at mbiel.com writes:
 
> Dictating (cyl) machines were 150 (per inch). <




yes, for Edison; but Columbia used 160 'grooves per (tpi)'.
 
allen
 
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