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

[Harold Aherne]

Are there such things are turntables controlled by computers, and would it be 
possible to enter starting and ending speeds that the turntable could adjust
to automatically and gradually as the record progressed? I must sound like an
awful ignoramus about the business of digital transfers!
 
Sir Brian says in his label book that the beginnings of World records sound 
acceptable at 33, while the endings are reasonable at 78. In no way does that 
mean that 33 and 78 were strict parameters used when recording, nor that they
apply equally to every World disc, but it's a start.
 
Here's a link to a photo of a Fred Duprez label. Does anyone know exactly
what "Speed B Slow" means?
http://www.normanfield.com/world501.jpg
 
-Harold
 
 
 


--- On Fri, 3/20/09, David Lennick <dlennick at sympatico.ca> wrote:

From: David Lennick <dlennick at sympatico.ca>
Subject: Re: [78-L] constant velocity records, was Value of 78's
To: "78-L Mail List" <78-l at klickitat.78online.com>
Date: Friday, March 20, 2009, 10:36 PM

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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