Doepfer

> Hi all
>
> I've been having problems with the A-140 and A-143-2 when
> adjusting the sustain level while the ADSR is being gated.
>
> The sustain level can be reduced but not increased. The A-141
> works fine, so when I send it a gate I can manually adjust the
> sustain level which changes the output voltage up and down. The
> other two ADSR modules ONLY adjust the output voltage downwards.
>
> Question:
> Is there a mod to change the A-140 and A-143-2? Perhaps there's a
> diode that can be bypassed somewhere?
>
> They are great envelopes and I don't want to have to get rid of
> them since they fit nicely into my live setup.
>
> Thanks
> Sean

I'm sorry - that's not possible because of the diode polarities in the A-140
and A-134-2 which are used to define the charge/discharge of the envelope
capacitor. Only "diode-free" ADSR designs (like the A-141) allow to adjust
the sustain level into both directions while the envelope is in the decay
phase(i.e. while the gate is "on" and the attack state is completed).

Best wishes
Dieter Doepfer