[78-L] Groove spacing - groove width

David Lennick dlennick at sympatico.ca.invalid
Mon Nov 21 22:49:41 PST 2016

That book containing "all the curves" that was meant to match the OWL claimed 
that Columbia didn't change its curve from 1939 to 1955. Horsefeathers, of 
course..every time they needed new 78 masters they did new dubs from the 
16-inchers, with a different EQ each time. The mid 40s were the worst ones with 
that gigantic mid-range hump (which I can only presume was so that its records 
would sound lousy on Victor players..problem is they sounded lousy on 
everything else as well).


On 11/21/2016 5:15 PM, J. E. Knox wrote:
> I find NO evidence of a treble boost (requiring a roll-off on playback) on ANY prewar Columbia commercial 78, or on a number of *postwar* ones as well! To make matters worse, from 1939 on, Columbia 78s are dubbed from 33-1/3 rpm safeties so are second-generation recordings.
> Take care,
>> Joe
>> “The only escape from the miseries of life are music and cats...”—Albert Schweitzer

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