[PD] env~ argument confusion

[Dario Sanfilippo]

>
> > so you get the same number of values, but they use different time-frames
> > for doing the averaging.
>
> Wow, crazy! Thanks for this explanation! Would be interesting to know
> for what different applications this (eg a long window with short
> period) can be useful. Anyway, it's very good to know.
>

For continuous measurements, you can also calculate the RMS in the audio
domain by squaring a signal, low-passing it with a 1-pole low-pass, and
taking the square root. The period of the filter, roughly, is the analysis
window. See Zölzer's "DASP" from 2008, page 229, for more information.

D



>
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