13 Feb
2003
13 Feb
'03
5:26 p.m.
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