Thread

Guitar amp and effects pedal built on the Waveshare ESP32-S3-Touch-AMOLED-2.06

163 points · 85 comments · arbayi

boguscoder · 1790561861 · focus · HN ↗
This is interesting sloproject but in spite of all verbosity I still didn’t parse how do you interface with it when it’s running on intended hw rather than in browser.
1. ornateelephant · 1790564793 · focus · HN ↗
  It needs a USB audio interface. Looks like USB Audio Class 2 interface is the go. There are a couple specific models listed.
  <a href="https://github.com/dashersw/coyopedal/blob/main/docs/USB_AUDIO.md" rel="nofollow">https://github.com/dashersw/coyopedal/blob/main/docs/USB_AUD...
  1. quinnjh · 1790570514 · focus · HN ↗
    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
    dashersw · 1790586298 · focus · HN ↗
    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.
  2. dofm · 1790594687 · focus · HN ↗
    Hmmm. I wonder if it will work with the USB-C guitar cable I have here…

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