Ok. I had a layout based on the LZX / L.Larsen design of the Summing mixer.
The basic design of the Summing mixer already has a place in my custom video synth, but
I want to add some features, and make it suitable for the Eurorack format
Maybe a simple filter . I don’t know yet. I was looking at an Allpass filter for phase shifting and possible interesting feedback effect…
Suggestions are welcome!
current layout & schematic features:
4 channel mixer
3 normal inputs with attenuators
1 inverted input with attenuator
2x normal output
1x inverted output
Sandwiched panel & pcb. No wiring, though-hole design.
(the inverted output need some work I think. )
The layout for the pcb is mostly done. I have some room left…