https://pedalboard.github.io/pedalboard-hw/latest/Recent content in Overview on Open Pedalboard — MainboardHugoen-ushttps://pedalboard.github.io/pedalboard-hw/latest/board/Mon, 01 Jan 0001 00:00:00 +0000https://pedalboard.github.io/pedalboard-hw/latest/board/<h2 id="audio-processing">Audio Processing</h2> <ul> <li>Raspberry Pi <a href="https://www.raspberrypi.com/products/compute-module-4/">Compute Module 4</a> or <a href="https://www.raspberrypi.com/products/compute-module-5/">Compute Module 5</a> <ul> <li>Flexible memory options for cost optimisation</li> <li>Optional WiFi</li> <li>Very low latency (~2ms with <a href="https://www.elk.audio/how-elk-audio-os-works">ELK Audio OS</a>)</li> </ul> </li> <li><a href="https://pedalboard.github.io/pedalboard-soundcard/latest/">Pedalboard Soundcard</a> — two channel differential I/O</li> <li>or HiFiBerry <a href="https://www.hifiberry.com/shop/boards/hifiberry-dac-adc-pro/">DAC+ ADC PRO</a> — high quality stereo I/O</li> <li>USB-A host + Mini USB device mode (firmware update)</li> </ul> <h2 id="midi-and-control-surface">MIDI and Control Surface</h2> <ul> <li>Raspberry <a href="https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf">RP-2040</a> with custom <a href="https://github.com/pedalboard/pedalboard-midi">firmware</a> (USB or WLAN update)</li> <li>6 foot buttons (push, release, long/short press)</li> <li>2 rotary encoders with push button</li> <li>2 expression pedal inputs</li> <li>8 <a href="https://github.com/pedalboard/pedalboard-led-ring">RGB LED rings</a> around each foot button</li> <li>2 RGB status LEDs</li> <li>STEMMA I2C connector for 2 OLED displays</li> <li>I2C EEPROM for config storage</li> <li>Flexible MIDI I/O: DIN 5, 3.5mm TRS, header pins, USB MIDI</li> </ul> <h2 id="power-supply">Power Supply</h2> <ul> <li>6–28V DC input (standard pedalboard PSU) with 3A buck converter</li> <li>USB powered option for MIDI module</li> <li>ORing support between onboard PSU and USB power</li> </ul> <h2 id="design-decisions">Design Decisions</h2> <ul> <li><strong>USB 2.0 only</strong> — 480 Mbps is more than sufficient for audio (stereo 24-bit/192kHz ≈ 9 Mbps) and MIDI. USB 3.0 would add cost, routing complexity, and require a 4-layer PCB — with no practical benefit for this use case.</li> <li><strong>2-layer PCB</strong> — keeps manufacturing cost low and the project accessible to makers. USB 2.0 signal integrity is manageable on 2 layers with careful routing and short trace lengths.</li> <li><strong>Dual-processor architecture</strong> — the RP2040 handles MIDI control with instant startup, while the CM4/CM5 runs ELK Audio OS for audio processing. This separation ensures the control surface is always responsive, independent of the audio OS boot state.</li> <li><strong>Modular design</strong> — the board works as a standalone MIDI controller without a CM4 installed, or as a full audio processing platform with CM4/CM5 + soundcard. Common components and existing modules (HiFiBerry, CM4) keep the BOM accessible.</li> </ul>https://pedalboard.github.io/pedalboard-hw/latest/release/Mon, 01 Jan 0001 00:00:00 +0000https://pedalboard.github.io/pedalboard-hw/latest/release/