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

[joe@salerno.com]

I'm not a mathematician, but I do not think it is linear. The 
"circumference" of the recorded groove will change on a more logarithmic 
scale, would it not?

joe salerno


umashankar wrote:
> atleast in audition (which was cooledit) this is a definite possibility. you can set an initial and final percentage of pitch correction. if you have those numbers, it should sound right. i think the rate of change is linear.
> 
> umashankar
>  i have published my poems. you can read (or buy) at http://stores.lulu.com/umashankar 
> 
> 
> 
> 
> ________________________________
> From: "Dnjchi at aol.com" <Dnjchi at aol.com>
> To: 78-l at klickitat.78online.com
> Sent: Saturday, March 21, 2009 8:00:44 AM
> Subject: Re: [78-L] constant velocity records, was Value of 78's
> 
> In a message dated 3/20/2009 9:25:42 P.M. Eastern Standard Time,  
> dlennick at sympatico.ca writes:
> 
> joe at salerno.com wrote:
>> the World label was available at least  during 1923 and 1924 and are 
>> almost totally unique
>>> among  78s produced for commercial sale: they are not meant to play at a  
> consistent
>>> speed!  In order to keep the velocity of the  record consistent, a special 
> mechanism was
>>> attached to the  gramophone to speed up the record as the soundbox moved 
> over it. 
>>   
>> has anyone ever figured out a speed change formula for transferring a  
>> constant velocity record?
>>
>> Or is it dependent on the  record size or something?
>>
>> joe salerno
>>
> 
> Norman  Field, who hasn't returned to this list, transferred at least one 
> World  
> some years ago and sent me a copy. Mind you, it was spoken word (a Fred  
> Duprez 
> routine). Variations in speaking pitch can be just as audible as  variations 
> in 
> music, but I don't know if he successfully transferred  music.
> 
> dl
> 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
> 
> 
> 
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