Such a simple module, but so useful..
A 4 hp attenuverting mixer.
The pots are 0 at centre.
I've built a few of these
I'm using 10R resistors for the reverse voltage protection in this module, but with others I used no protection.... just a strip of wire.
If you do accidently plug it in backwards and see the dreaded puff of smoke, the 10uF caps are the most likely component to blow.
100k x 8, and just one 1 k resistor
..The op-amp is a TL-072
the pots a all linear B-100K
The pots are 0 at centre, -1x gain to the left (inverts) and
1x gain to the right.
Thus is you are using this as a audio mixer it can be a bit tricky to find the exact centre
of the pot where its totally silent.
Pot 4 will act as a voltage offset if nothing is patched into
input 4. It can supply -5V to +5V of offset. If you do not
want any offset, leave pot 4 at midpoint, or patch your signal
into input 4.
The module will work with audio and CV signals. It is useful
for creating sequences from logic modules such as the Divide and Conquer , Bools or 1/n .
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