[sdiy] Linear vs. Exponential control of VCA's

[Theo]

Maybe I am off but;
Wouldn't a expo VCA driven with a linear EG give a "unnatural" attack curve?

The "resulting" attack of  the combination exponential EG and linear VCA
first changes rapidly and then slower as it reaches the top.
While a linear EG driving a expo VCA would give a slow start and then rush
to the maximum.
Also the two combinations are not interchangeable.

Theo

From: Scott Bernardi <sbernardi at home.net>

> The decay and release curves are decaying exponentials (i.e., exponential
> approach to zero) while the attack is an exponential that approaches a
> non-zero value. Both are "natural" responses. Musical instruments that are
> percussive in nature (struck or plucked strings, drums) will have a
decaying
> exponential amplitude envelope.  If you think of it, the response of an RC
> filter to a step function is a natural one too, and that's basically what
an
> envelope generator is (AR).
> I'm thinking a linear ramp generator driving an exponential VCA is the
same as
> an exponential EG driving a linear VCA.
> I guess my question is, what are people using in their systems? What do
some
> of the old classic systems (Moog, ARP, OB, etc.) use? Has anybody ever
done
> any comparisons?
>