MOTM

> Never mind my last post. The output would only swing from +10 to 0 volts,
> and bipolar would probably be more useful. See the attached image for a
> quick and easy schematic. The opamp type is not critical.

The Joystick module I've built some years ago for my JH-3 system
has the following features:

CV Output jacks for X and Y, bipolar +/-5V each.
Two bicolor LEDs for X and Y.

Four VCAs with inputs/outputs connected in "diamond shape"
with a variety of functions:

(1) Mixing of 4 inputs into one output with 2 modes (see below):
   2-dimensional crossfading.
   When only to of the 4 inputs are connected, the other ones are
   automatically normalized to the negative (inverted) input signal
   of the adjacent inputs. (Acting as a 2-dimensional reversible
   attenuator)

(2) Distributing one input to 4 outputs (2-dimensional or "quad"
    panning)
    Use this as "Azimuth coordinator" for a real Quad system, or
    connect two of the outputs to the effect send of a true stereo
    reverb in an ordinary stereo system.

(3) "Mode" switch, applies to both (1) and (2):
    a) normal panning / crossfade: When joystick is in center,
       result is a mix of 50% X and 50% Y.
    b)  center zero: When joystick is in center, there is no output
       signal at all. This means independent selection of 4 different
       sources, for instance.

I don't remember circuit details, but I think I found a way to do it all
with just a SSM2024 and 2p2t switches - kind of matrix connection.

JH.