AW: AW: Keyboard/Midi Frontend (RE: PolyModular Standards)

[Ingo Debus]

Ingo Debus wrote:
[dicrete sustain logic]
> Hmmmm, if the interface just outputs the normal gate (not affected by
> sustain) and a separate sustain signal, there would be some discrete
> logic needed (per voice) to handle sustain properly. It's late now and I
> don't like thinking about it too much, but it doesn't seem to be trivial
> to me.

Now I know. It's easy with separate gate and trigger inputs at the
envelope generators. The gate applied to the EGs is just the
gate/trigger from the voice assignment logic ORed with sustain. Much
like the hammer and damper of a piano string.

jh wrote:
> > A little more than that. You also want to remove the disabled voices from
> > the assignment algorithm. It should even be implemented to work as
> > a "Drone Mode", i.e. if you disable a voice for which the key is still held
> > on the keyboard, the gate should be (optionally) kept high, and the last
> > pitch should be kept assigned to that voice. So you can sustain individual
> > notes independently, and also release them independently.

Something similar should be possible with sostenuto: it's like sustain,
but only the keys pressed before the pedal is pressed are sustained.

Ingo