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It needs a USB audio interface. Looks like USB Audio Class 2 interface is the go. There are a couple specific models listed.

https://github.com/dashersw/coyopedal/blob/main/docs/USB_AUD...

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I was wondering how they got any usable latency with esp32. External adc/dac card- okay

Has one been built ? Not clear from the docs

ESP32-S3 is a great USB host. I have a custom version where I use a Daisy Seed 3 as the ADC/DAC (it uses I2S for audio, not USB) that I built with around 4ms total latency. If you turn off the amp model (which is pointless, but) it's around 2.6ms. I also patched the iRig HD X firmware so its analog latency is around 1.2ms, practically achieving the same performance as the custom Daisy Seed 3 interface.

Hmmm. I wonder if it will work with the USB-C guitar cable I have here…

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