Mainboard for processing audio and/or MIDI data on a pedalboard. Modular design supporting MIDI-only or combined MIDI + audio configurations.

Key Features

• Raspberry Pi CM4/CM5 for audio processing (< 2ms latency with ELK Audio OS)
• RP-2040 MIDI controller with independent firmware and instant startup
• 6 foot buttons (short/long press, push/release) + 2 rotary encoders
• 8 RGB LED ring connectors + 2 OLED display ports
• Flexible MIDI I/O: DIN 5, 3.5mm TRS, USB MIDI, header pins
• 2 expression pedal inputs
• USB-A host + Mini USB device (firmware update)
• 6–28V DC input with 3A buck converter, or USB powered

Related

• Sound Card — I²S audio codec HAT
• Display Board — LED rings and OLED displays