[music-dsp] Unintentional time-stretching

sarth at sarth.net sarth at sarth.net
Fri Feb 23 01:14:55 EST 2001


y

very likely multiple units set as master clock source during one of the
transfers. Is it a l-r file? Which of the transfers (if any) were
simultaneous and which were consecutive?

> 
> 
> But that would also change the pitch, and the length change would be
> much greater than observed. The reported length change (7436 frames
> to 7450 frames) is very close to the ratio of 29.97 to 30, so the
> problem is more likely that "pulldown" was the culprit at some point
> in the transfer.
> 
> A nominal 44.1kHz session may play back at 44056 Hz if the audio
> clock is referenced to video sync. Then again, it may not, depending
> on the system settings. This is a notorious source of .1% sync drift
> in long files.
> 
> -Alex Stahl
> 
> 
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> 


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