Hi Ingo,

> values in a given period. An exp. VCA reacts faster than a log. VCA

Sorry, this is nonsense. So called "Exponential" and "Logarithmic" VCAs
are the same (at least in the analog modular synths, we all know). Its
simply a point of view, either from amplification side or from control
voltage side.
I would prefer the description are linear and non-linear VCA.

Non-Linear VCAs are those, which have an expo converter in the control
current circuit.


and to O_lix:

> and has thus less punch.

It depends, what you call "punch". Most non technical orientated people
call a highly compressed playback with not a lot dynamics "punchy".
Bassdrums will sound like boxing in your stomache.

More technical thinking people, call a fast changing leveldifference
within different timediffences more punchy (mathematically spoken:
Delta-Level(Delta-T1) > Delta-Level(Delta-T2)). Snaredrums will sound
like famous "ice pick in the forehead" [(c) by Frank Zappa].

So the first half will call linear VCA more punchy and the second half
will call the log/exp-VCA more punchy.

I tend to the non technical point of view and prefere linear VCAs for
envelope modulation.

Florian