A short demonstration showing how the use the XIAO MIDI Synthesizer as a Synth module, using the buttons for program selection and volume control, and plugging in a USB MIDI keyboard (which involves swapping the ESP32-C3 for a SAMD21).

Part way through I remove the external audio to hear the difference when only using the built-in speaker.

Full details here: https://diyelectromusic.com/2025/06/27/xiao-esp32-c3-midi-synthesizer-part-4/

Kevin