[78-L] Orthoacoustic

[Royal Pemberton]

I think Orthacoustic was a recording curve only used for transcriptions,
not for commerical 78s.


On Sun, Jul 20, 2014 at 3:14 AM, DAVID BURNHAM <burnhamd at rogers.com.invalid>
wrote:

>
> I have always believed that the American record manufacturers introduced
> high frequency pre-emphasis in 1936; however, I was just reading the
> Sherman/Nauck book "A collectors guide to Victor Records" and they say that
> it was introduced at the end of 1939, and it was called "orthoacoustic".
>  Am I miss-reading something here or is 1939 the correct date?
>
> db
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