[sdiy] stereo synthesis

[The Old Crow]

On Mon, 8 Oct 2001, Chromatest Pantsmaker wrote:

> this made me think about my poly-six when it's in "monophonic" mode.
> Can't think of the proper name for it, but it's when all 6 voices are
> stacked... couldn't one mod in some circuit breaks so that 3
> voices/filters/etc go to one channel, and the other 3 to another?  in
> theory it doesn't seem too tough.

  The Polysix shares the same key assigner microcontroller program as used
in the MonoPoly.  There is a Mono/Poly mode titled "Unison/Share" that
assigns the number of keys held down to the 4 oscillators.  1 key gets 4
oscs, 2 keys get 2 each, 3 keys get one each, 4 keys get one each.  Now,
since the Polysix uses the same microcontroller program it is possible
(I've tested it) to select the Unison/Share key assign mode on the
Polysix.  A switch is wired to the same column/row signals as used on the
mono/poly.

  The only caveat is that like the Mono/Poly, Unison/Share on the Polysix
only triggers 4 oscillators.  Voices 5 and 6 are silent.

  Another machine that can do this stereo synthesis thing is the CS-80, as
it has two parallel voice chains (8x2 configuration).  The only thing
required to obtain true stereo output is to tap the audio signal at the
I/II mix lever and buffer the section I and section II signals to their
own true L and true R jacks.  (The left and right jacks on a stock CS-80
are from the chorus unit, not from sections I and II).

Crow

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