Audio without sensor board

Just realised that when I bought my pixelblaze for some reason I ordered two boards but only one sensor board. I’ve left it too late to order a second sensor board before my event. I can’t share the audio data between them as they will be in use on different stages.

Any way I can attach a digital mic directly to the main board or is my only option to have second micro controller with the mic and try and output the serial data as if i were the official sensor board. If so is the FFT and mic related code somewhere public and in a form that would work on something like an ESP32?

The hardware details and software are here:

Hopefully that could be some help to you.

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Not directly on the PB, but yes you can have another board send over the serial data using the same sensor board format. The key processing bits are in output.c.