[78-L] constant velocity records, was Value of 78's

[joe@salerno.com]

How did one indicate the "speed" of a CV record? Was there a median 
speed? Start-stop? OR you just had to have the right box to play it on, 
and if it got out of alignment, a part wore, or it got stickiness in it, 
you were just sunk?

How did they calibrate the players at the factory? Anyone ever seen a 
document on this?

joe salerno

David Lennick wrote:
> Dnjchi at aol.com wrote:
> 
>> Playback might be possible if software could be developed by which the  speed 
>> of the download might be increased or decreased (which is it?) linearly  from 
>> start to finish.  That is, digitalize at (say) 78, and then use some  program 
>> to adjust for playback.  Has this yet been done?
>> Don Chichester
> 
> Probably fairly easy to do in the digital domain once you know the key in which 
> the music should be (roughly), and the fact that World Records showed a playing 
> time on the label will help. But there's no guarantee that the speed was 
> absolutely constant during the recording process, any more than conventional 
> 78s are absolutely correct throughout..your ear will have to play a part in the 
> processing process.
> 
> There were also CV discs made for a juke box around the early 40s. These have 
> been mentioned here once or twice and I think Kurt Nauck had some listed a 
> couple of years ago.
> 
> dl
> 
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