HECTOR

Audio mixer -> router w/ mute

(from the bottom) 2 audio IN mixed go to 3 multiplied OUT.
One (diamond) with mute function and 2 with Or function (square or triangle).

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OR switch is a On/Off/On so it can do : triangle OR mute OR square.
The third IN (doted line) replace the "by default" mixed signal if something is plugged ... So it is possible to use it as a mute function for anything else.

I create it to mix left/right outputs from Elektron drum machines and send mixed signal to master mixer (triangle) OR to scooper (square) AND to Doepfer Matrix Mixer effects (diamond).
HECTOR ... because in french, we say "c'est l'HECTOR".