AW(2): adsr and lfo abolish

[jh]

>Very valueable hint, thank you. The commercial synths I currently use
>with my Wind Controller don't allow for real-time modulation of Sustain
>level, but my self-made synth (with CEM3310 ADSRs) does. I intended to
>try this all the time, but I haven't yet (shame on me).
>But does the sustain cv really affect the ADSR's output voltage when
>it's still in the attack phase? When I look at the CEM3310 schematic,
>this doesn't seem to be the case. But then, producing a soft attack with
>breath is easy, so it wouldn't matter to set the ADSR's attack time to
>minimum. A lagged decay is more interesting. It would be most useful in
>the release phase, after Note-Off. This again doesn't seem to be
>possible with the sustain cv. (Don't bother with these questions too
>long, I'll try it in the next time anyway.)
>
>Ingo

Yes, you will only know for a certain ADSR circuit if you actually try it.
I think I have even seen circuits that use extra components to *avoid*
the output being increased when the sustain is increased during the
decay phase (why ??). My own experiments were made on SSM2056's,
and I'm designing my own discrete VCADSR's to work that way, of course.
I haven't tried on a CEM3310. But I know that in the OB-8 the whole
filter envelope is scaled without an extra VCA, just by changing the
"Peak" CV (attack phase) and "Sustain" CV (decay phase) of the 3310.
And thinking of it, yes, on the OB-8 the filter is opened when the Sustain
is increased in real time (without new gate/trigger). Just can't remember
if it's lagged with the Decay time in both directions, or with Attack / Decay
times as in my own ADSR's.

JH.