Looking at I2S MEMS Microphones and an I2S DAC.
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay: https://www.pcbway.com/project/sharep...
Design files: https://github.com/GadgetReboot/PJ320...
Demo Sketches: https://github.com/GadgetReboot/misc_...
I2S PCM5102A DAC Decoder https://s.click.aliexpress.com/e/_Dlq...
I2S MEMS Microphone INMP441 https://s.click.aliexpress.com/e/_DdE...
I2S MEMS Microphone MSM261S4030H0 https://s.click.aliexpress.com/e/_Dlr...
PJ320A TRRS 3.5mm Through Hole Jack https://s.click.aliexpress.com/e/_DBV...
PJ320D TRRS 3.5mm SMD Jack https://s.click.aliexpress.com/e/_DnM...
How to configure PCM5102 DAC module https://raspberrypi.stackexchange.com...
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