Archive of the former Yahoo!Groups mailing list: MOTM

Hi All !

As this came up again, i checked my downloaded schematics, and found
the MS20 ones, downloaded dec97, so no URL :) (anyone ?)

Surely enough, this has the same characteristics as the MS50, but the
normal out goes to the VCA (no ext out) . The "sustain at 0v" one
goes to the filter (no ext out either), and the inverse of this is on
the patch panel . Circuitry is simple enough, two opamps (4558) and
8 resistors (plus PS decoupling, i suppose) . It's on the
ms20_pg4.gif in the 885kb .zip, bottom left .

When plugging in such an env, one is guaranteed that the sustain will
not affect the sound of the patch, as it is a 0V . With the sustain
knob at 0 one gets a positive AD envelope, no release . Sustain at
10 gives an ASR envelope, only subtracting something from the set
point . When modulating the filter cutoff, for ex, this means one
does not have to touch the freq when increasing the mod amount to get
back to the same sustained sound . And this is even more important
on pitch, no retuning here . Very useful, as i said .

Bye for now .


Keep 'em oscillating :)


Hugo
=