[linux-audio-dev] Envelopes

Fons Adriaensen fons.adriaensen at skynet.be
Sat Jul 1 12:09:02 UTC 2006

On Sat, Jul 01, 2006 at 08:22:16AM +0200, Jens M Andreasen wrote:

> Linear attack sounds OK. Given the exponential way we perceive volume,
> this *is* the desired function.

That's the rationale for having exponential volume controls. In the case
of a release profile, it's rather because many real sounds produced by
resonating physical things (so-called intruments :-) die out exponentially. 
But that is only the simplest case. Once you couple e.g. a string to a
soundboard, what you get is usually a sum of exponentials with different
time constants. AMS has a module that emulates this.

A good way to produce natural sounding envelopes is not the 'construct'
the envelope, but to see it as the output  of a filter operating on a
trigger or gate signal.


Follie! Follie! Delirio vano e' questo!

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