Wired, Wireless Audio Mixer

[76-7]

Which chips and/or MCU (want to have a graphical user interface, rotary encoders/knobs for volume and EQualizer settings) would be suitable for multiple stereo audio inputs and outputs? What would I need to mix more than one input and have them play out over a single output?

edit: I am considering ESP32-S3 (Wireless Audio); and RP2350 but do I need to have ADCs, DACs, and DSP to do audio stuff?

[jwet]

Something interesting to look at is the TEENSY 3 or 4 with PJRC's Audio board.  These can do cd quality audio DSP functions, the audio board acts like a sound card and has a stereo I2S codec on it.   The biggest deal is that PJRC has written this amazing audio library that lets you drag and drop audio blocks and generates code that you can them plop into the Arduino environment.  I think I've seen two audio boards on a single Teensy which might give your multiple inputs requirement.  You could also make an analog mixer that you mixdown your input to the Teensy Audio board.  An analog mixer is pretty simple but requires quiet rails and good layout.

The missing piece is the wireless (assuming bluetooth) could just be a specialty audio to BT board or chip.  I guess you could also pair the Teensy with ESP of some kind to fill the wireless need- can you feed I2S to the ESP stuff and have it transmit as audio?

Sounds challenging but doable.  Good luck.