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music · digital

A pocket MIDI groovebox, designed by AI

Digital instruments live on I2S and MIDI, not on OTAs. This board is a USB-C ESP32 groovebox: TRS MIDI in and out, a stereo DAC into a real headphone amp, and a bank of panel pots on one ADC. Firmware owns the sound; Ohmni owns the hardware.

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A compiled board from the studio. Drag to look around.

What ends up on the board

  • USB-C power and a 3.3 V rail
  • ESP32 module plus programming header
  • MIDI TRS type-A in and out
  • I2S stereo DAC into a DirectPath headphone amp
  • Four panel pots scanned through an analog mux

How Ohmni designs it

  1. The circuit is generated from your description: UART pins for MIDI, I2S pins for the DAC, ADC1 for the pot mux.
  2. The 3.3 V rail is sized for the DAC and headphone peaks, then simulated and rule-checked.
  3. You download gerbers, a BOM, and a 3D preview, ready for your fab.

Design this board now

The prompt below goes straight into the studio. Edit it there, or use it as-is.

USB-C ESP32 groovebox: MIDI TRS in and out, I2S stereo DAC into a headphone amp, four panel pots on an analog mux, programming header. 3.3V rail.
Free to use