> Hi John, hi Dieter,
>
> Not completely a separation of the two time rates, but some
> approximation (this assumes, that the potentionmeters are not used as
> electrical potentiometers, but as variable resistors):
> - Reduce the Capacitor
> - Insert a fixed resistor (lets say 20% of the potentiometer value) on
> the maximum side of the attack potentiometer
> -Insert a fixed resistor (at least the same value as the R above or even
> more) on the minimum side of the decay potentiometer.
>
> This will cause shorter attack times, and will keep the minimum Decay
> time where it is. If the addition decay-resistor is even larger than the
> attack-resistor, then the decaytime will stay the same as with the
> original capacitor.
>
> Florian

These serial resistors are already available in the circuit. Both the attack
and the decay circuit use a 1M variable resistor in series with a 2k2 fixed
resistor (so the minimum overall resistance is 2k2 when the potentiometer is
fully CCW). The fixed resistors are R4 (attack) and R5 (decay). R2 is
located just behind the attack potentiometer, R5 near C1 (next to the 555
timer circuit). One could replace C1 e.g. by 0.22n (i.e. 1/10 of 2u2) or
0.47n (i.e. 1/5 of 2u2) and increase R5 to 22k (x10) or 10k (x5). It's not
possible to insert a fixed resistor to the "maximum" side because it does
not matter if the fixed resistor is added to the max or min side because
both resistance values (fixed + potentiometer) are always added.

Best wishes
Dieter Doepfer