esp32_usb_midi

ESP32 USB MIDI add-on for arduino synthesizer projects

• video presentation of the initial state of this project https://youtu.be/Mt3rT-SVZww
• little quick start guide to get started with arduino synthesizer / music projects: https://youtu.be/ZNxGCB-d68g

This project has the purpose to combine different MIDI interfaces, especially USB-MIDI You can forward MIDI from USB to DIN for example. Also the ADC readings can be used to generate control messages (for DIY MIDI controller)

The project has been tested on

• ESP32 DEVKIT - DOIT (actually only supporting esp32\1.0.4 library)

ESP32 DEVKIT - DOIT

To compile set the board to: DOIT ESP32 DEVKIT V1 Ensure that "#define ESP32_AUDIO_KIT" has been removed from config.h

MIDI via USB

MIDI can be received via USB activating the MACRO "MIDI_VIA_USB_ENABLED" in config.h.

Default PIN Mapping is:

• CS: IO5
• INT: IO17 (not used)
• SCK: IO18
• MISO: IO19
• MOSI: IO23

MIDI USB Mapping

A MIDI USB mapping can be setup in z_config.ino This allows to forward incoming messages to different outputs or an internal application running on the ESP32.

Using an ADC multiplexer

Connection of the ADC multiplexer:

• EN -> Ground
• S0 -> IO33
• S1 -> IO32
• S2 -> IO13
• S3 -> Ground
• Sig -> IO12 Here is the related video: https://youtu.be/l8GrNxElRkc