Re(2): Modular patch system

[Tim Walters]

At 11:14 AM 6/19/96, Barry Bernard wrote:

>  I think the point is, that this sort of thing wouldn't work for voltage
>control inputs. You could wire this connector in parallel with your regular
>patching system, but you wouldn't be able to add modulation on the same
>summing amp input resistor. It wouldn't be that big a deal to add input
>resistors at the summing node to accomodate extra modulation
>inputs from this multipin connector.

Actually, I was planning to just wire the connector pins in series with
their respective pots.  Then, for "preset" mode, you just open up all the
pots all the way, and let the resistor in the preset control the voltage.
You could then tweak it in one direction, at least.  (Obviously, you'd want
to exempt audio oscillator tuning from this scheme.)

Mixing single outputs to multiple inputs is easy; just solder the wires
together at the output end.  (I'm planning to put a few mults on the front
panel to do this with the patchbay.)  As far as mixing multiple outputs to
a single input, you can't do that.  But then, you can't do it on the
patchbay either, unless you build a mixer.  Since Gene has been
ultra-generous in providing inputs (6 CV/2 FM/2 sync inputs for each
oscillator, 4 CV/1 -CV inputs for each filter), I doubt that this will be a
problem.

With regard to cross talk, I assume that if digital signals can run OK
through these connectors that it can't be too out of hand.  If I'm wrong,
well... I've heard that cross-talk gives pin matrix synths some of their
character.

With regard to Gene's frightening Minimoog memory story:  I'll keep it in
mind if I'm ever exiled to Siberia with nothing but a soldering iron and
the Allied catalog :).


-----------------------------
"Ever wonder what it sounds like *inside* that trash can icon on your
desktop?  Tim Walters knows."  -Jim Aikin, _Keyboard_

Tim Walters  --  walters at digidesign.com  --  http://www.slip.net/~coredump