[PD] from signal to VU
Mathieu Bouchard
matju at sympatico.ca
Thu Feb 13 17:26:12 CET 2003
On Wed, 12 Feb 2003, Thomas Grill wrote:
> > On Wed, 12 Feb 2003, Alex from Idoia wrote:
> Don't know if it's what you wanted to know, but in typical musical or
> acoustic applications one would not take the instantanous sampled signal but
> an envelope or average of the absolute samples over some (small) timespan
> ("RMS value"). Thus, sqrts or logs of negative numbers can't occur. The only
> case is rms=0, which is easily treated as a special case (e.g. -1000 dB)
Okay, that explains it. Now I'm curious about what length of timespan it
is (typically), and whether it's a moving average, or a per-block average.
________________________________________________________________
Mathieu Bouchard http://artengine.ca/matju
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