M5 Synth

This is a simple project I created to study some of the audio capabilities of the M5Stack devices.

Synth Scales

Targeted/tested device: M5Cardputer.

Speaker and Keyboard are required.

The very first project I created for the M5Cardputer. It's a simple demo for playing some notes (using the Speaker) of a particular musical scale.

• Notes can be played by pressing the 1~8 number keys on the keyboard.
• The Key can be changed by pressing ◂ or ▸ on the keyboard.
• Reset to the default Key (C4) by pressing esc on the keyboard.
• Major and Minor scales can be toggled by pressing M on the keyboard.
• Volume can be adjusted by pressing ▴ or ▾ on the keyboard.

Synth Midi

Targeted/tested device: M5Cardputer and M5StickC Plus 2 (may work with M5StickC Plus, but has not been tested).

Speaker (Buzzer for the M5StickC Plus 2), BLE and a Bluetooth Midi Controller required.

External lib required: https://github.com/max22-/ESP32-BLE-MIDI

After creating the previous demo, I tried to create something similar but with Midi support. It's still just a simple demo for playing some notes (and chords), but now with more flexibility.

• After booting, the program will scan for Midi controllers and automatically connect to the first one it finds.
• Press the BtnA button to toggle between sine and square wave instruments.
• Press the BtnB button (M5StickC only) to flip the screen.
• Only note on/off and volume messages have been implemented.