An USB class-compliant MIDI firmware for Arduino Uno/Mega (ATmega16U2) is required for using USB MIDI. Pedalino is tested with mocoLUFA because it supports dual mode boot (USB-MIDI or Arduino-Serial) and high-speed mode (1 Mbps). HIDUINO can works with minimal changes.

More information can be obtained in the following links:

• MIDI_Controller
• MocoLUFA
• HIDUINO