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Paul, I have dubbed lots of acetates (instantaneous discs) and the phono-EQ
curve is not predictable.  I believe AES came about in about 1951, but NAB
was fairly widespread.  But that's not so useful.  You really have to try
things, including no curve.
Best,
John Haley
On Mar 11, 2015 2:36 PM, "Tom Fine" <[log in to unmask]> wrote:

> I would think NAB or AES. See how that sounds. It'll be something in that
> ballpark if it's from the 1940s and it's not RCA or Decca.
>
> -- Tom Fine
>
> ----- Original Message ----- From: "Paul Stamler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, March 11, 2015 3:27 PM
> Subject: [ARSCLIST] De-emphasis for acetate discs?
>
>
>  Hi folks:
>>
>> What de-emphasis curve is a good choice for acetate discs? I have six 78
>> rpm sides by a gospel quartet here, recorded in 1946 at a local studio. The
>> discs are Presto, but of course that's no guarantee that the disc cutter
>> was also a Presto.
>>
>> Anyway, I'm  wondering what a good curve would be as a starting point?
>> NAB?
>>
>> Peace,
>> Paul
>>
>>
>>