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

[joe@salerno.com]

Are all CV records electrical? OR were there some acoustics?

If electrical, and if you were really desparate and had plenty monetary 
units to spare, you could go to Chase or someone to use their 
proprietary speed correction process.

joe salerno


Harold Aherne wrote:
> 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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