Re: [ARSCLIST] Tape Speed resolver question

["Scott D. Smith" <sdsmith@xxxxxxxxxxxxxxxx>]

Bruce,

I'm a little late here, but thought I'd throw in my .02 anyway. I'm 
wondering if the tracks you have were to be used as part of a video 
production of some sort, or if they were intended as "audio only" studio 
recordings. I must admit I'm rather perplexed by the 3 khz component. 
Does the waveform appear to be a sine wave, or a square wave? It does 
sound rather like a console automation signal.

Also, it was a very common practice back in the day to use vertical 
drive as an additional sync reference for video production, but this 
would still be around 60 hz.

In any event, if the recordings were made with a two machine lock-up 
during production, you could easily scale down the 3 khz component to 60 
hz, and use it to resolve the tape back to house reference during transfer.

Scott D. Smith

Chicago Audio Works, Inc.


Bruce Maddocks wrote:

> Exactly Dave.
>
> Also the example of EECO (ECCO?) code I found on the internet contained
> a 60 hertz component in addition to their proprietary code (pre SMPTE).
> Their thought (if I could read their minds) was to allow the possibility
> of speed resolved playback in the future should all of the original code
> hardware become obsolete. Very forward thinking.
>
> The hunt for a solution continues!
>
> Cheers!
>
> Bruce
>
>  
>
> > -----Original Message-----
> > From: Association for Recorded Sound Discussion List 
> > [mailto:ARSCLIST@xxxxxxx] On Behalf Of Dave Bradley
> > Sent: Sunday, December 11, 2005 8:40 AM
> > To: ARSCLIST@xxxxxxxxxxxxxxxx
> > Subject: Re: [ARSCLIST] Tape Speed resolver question
> >
> >
> >    
> >
> > > > I even looked around the "dirt" below the 3khz peak 
> > > >        
> > hoping to find a 
> >    
> >
> > > > 60hz component I could grab, but it was just noise and "junk".
> > > >        
> > > 60 Hz....there´s no 60 Hz in SMPTE time code to the best of my 
> > > knowledge.....
> > >      
> > While you are correct, if there was a 60 cycle hum on the 
> > tapes, that would 
> > be useful is setting the playback speed....
> >
> >
> > -----------------
> > Diamond Productions
> > Preserving the past for the future.
> > Dave Bradley   President
> >
> >    
>
>
>