MIDI 2.0 Song Sender

USB MIDI 2.0 Device example that plays "Twinkle Twinkle Little Star" using native UMP (Universal MIDI Packet) format with full MIDI 2.0 expression.

MIDI 2.0 Features Demonstrated

16-bit Velocity (vs 7-bit MIDI 1.0)
32-bit Control Change values
32-bit Pitch Bend (vs 14-bit MIDI 1.0)
32-bit Channel Pressure (Aftertouch)
32-bit Poly Pressure (Per-Note Aftertouch)
Per-Note Management (MIDI 2.0 exclusive)
Program Change with Bank Select
JR Timestamps

USB Descriptors

The device exposes both USB-MIDI 1.0 (Alt Setting 0) and USB-MIDI 2.0 (Alt Setting 1) as required by the USB-MIDI 2.0 specification. A MIDI 2.0 capable host (e.g. Windows MIDI Services) will select Alt Setting 1 for native UMP transport. Legacy hosts use Alt Setting 0 with automatic MIDI 1.0 fallback.

Interface	Class driver
0–1	MIDI 2.0 (audio control + MIDI streaming)

Configuration

Notable tusb_config.h settings:

#define CFG_TUD_MIDI2           1

Building

CMake:

bash

mkdir build && cd build
cmake -DBOARD=raspberry_pi_pico ..
cmake --build .

Make:

bash

make BOARD=raspberry_pi_pico all

Testing

Linux:

bash

aseqdump -p "MIDI 2.0 Device"

Windows (MIDI 2.0 native):

powershell

midi endpoint list
midi endpoint monitor

Song Data

Twinkle Twinkle Little Star in C major, 120 BPM. Six phrases with dynamic shaping (pp to ff crescendo and back), pitch bend vibrato on sustained notes, and channel/poly pressure for expression. All values use genuine MIDI 2.0 resolution with no 7-bit equivalent.