[sdiy] VC ADSR

[John L Marshall]

Instead of thinking ADSR think steps that can go up or down. An envelope
could have many more than 4 steps. Three pots would be required for each
step. One pot would select the slope; to the right of center is increasing
rate of up, to the left of center is increasing rate of down. The second pot
would select the level. The third pot would select shape. The center
postition would be linear (constant current); to the right degrees of log
response; to the left degrees of exponential response. Is this thing some
sort of specialized sequencer?


----- Original Message -----
From: jbv <jbv.silences at wanadoo.fr>
To: SynthDIYLIST <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, September 02, 2001 5:24 AM
Subject: Re: [sdiy] VC ADSR


>
>
> > Paul Maddox wrote:
> >
> > > Dear all,
> > >
> > >  Im thinking of haveing a go at a VCADSR module...
> > >
> > >  Couple of questions..
> > >
> > > I know that the attack phase of most Capacitor based ADSR is not liked
by
> > > many..
> > > should I try and get a linear attack stage, then log Decay/release?
> > >
> > >   Should I include an option for Lin/Log?
> > > ie,
> > >
> > > Lin ;- Linear Attack, Decay AND release
> > > Log;- Linear attack, log decay and log release
> > >
> >
>
> This is something I've been brainstormin on lately :
> I decided to use a uC and LUT to generate log / lin slopes,
> and even parabolic & other exotic shapes...
>
> I've even considered VC-morphing between those slopes.
> This is feasable via software, but the downside is the number
> & type of controls to make it easy to use : the front panel of each
> VCADSR would feature more pots than the rest of the modular...
>
> JB
>
>
>