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  • filip

MIDI Controlled Dual Stereo Audio Switch/Mixer

Commissioned build. Switches two sets of stereo pathways to a set of outputs according to MIDI program change commands. Like a supercharged dual A/B/Y switch.

Based on Arduino and 8 reed relays, the signal path is all analog, and mixing (A AND B) is accomplished with op-amp summing amplifiers.

Opto-isolated MIDI In, software THRU. A WS2812b-based RGB LED for state indication. USB port on the side is purely for programming, and is mounted with a custom designed and 3d printed bracket. Takes 12VDC in.


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