Can anyone tell me how I might detect and measure a digitally time stretched audio signal (Pro Tools) when subsequently made back onto tape?
Could quantization of the signal be detectable on tape and perhaps be seen using a spectrum analyzer?
4
-
$\begingroup$ You could perhaps try and use a phase vocoder which might reveal some noticeable artifacts. Also it's highly unlikely that the effects of quantization would be preserved on tape (an analog medium). $\endgroup$– Ahsan YousafSep 7 at 0:55
-
$\begingroup$ If you don't have the original to compare to, and if the time-stretching product is really good (like Melodyne or Serato or SoundToys SPEED), it's gonna be real hard to tell it was stretched. (I presume you mean time-scaled without changing pitch.) A time-domain time stretcher will have artifacts for note onsets and dissonant chords or many instruments playing many notes simultaniously. $\endgroup$– robert bristow-johnsonSep 7 at 2:39
-
$\begingroup$ What does "quantization of the signal" mean in the context of this question? $\endgroup$– robert bristow-johnsonSep 7 at 2:45
-
$\begingroup$ > If you don't have the original to compare to, and if the time-stretching product is really good (like Melodyne or Serato or SoundToys SPEED), it's gonna be real hard to tell it was stretched. (I presume you mean time-scaled without changing pitch.) A time-domain time stretcher will have artifacts for note onsets and dissonant chords or many instruments playing many notes simultaniously. The time-stretching was most probably done in Pro-tools, and the tapes contain speech not music. And yes, I mean time-scaled without pitch change. > What does "quantization of the signal" mean in the context $\endgroup$– AudiserSep 7 at 14:36
Add a comment
|