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Subject: Re: [motm] DIY keyboard

From: jwbarlow@...
Date: 2000-08-13

In a message dated 8/13/2000 12:11:41 PM, jlarryh@... writes:

>As luck would have it, I found a very
>nice 5 octave keyboard mechanism built into a very nice walnut case that
>3 contacts per key. In addition, the precision resistors for the CV are
>already installed. And, in the appropriate place is a great spot for a
>joystick or whatever.

Do you know what this was from? Very lucky indeed!

If space would permit you might think of putting in two joysticks or a wheel.
This would allow you to control the obvious things like pitch and filter
cutoff frequency as well as having a separate way of controlling some sort of
modulation (like cross modulation between two VCOs) -- just a thought.

>So, looks like a velocity CV is possible too.
I am thinking pitch
>CV out, joystick X and Y CV out with the ability to couple one axis of
>joystick to pitch CV internally, gate AND trigger out, velocity CV, and
>maybe the ability to split the keyboard. And, when using gate only, it
>would be nice to be able to retrigger for the next keystroke (selectable).
>I am planning to avoid DACs, PICs, matrix and all that stuff.

I'd think that velocity and keyboard splitting would be a lot of extra work,
and easier with some sort of uP than hardware -- better suited to Paul's 8051
project with a scanning keyboard (plus all the other stuff you could make
that do).

I think a "basic" 3 buss keyboard project can be found in Barry Klein's book
and Tomg used to have a keyboard PCB at his site.

Good luck with this!