Firmware and tools for the Music Thing Modular Workshop Computer — a programmable Eurorack module built around the RP2040 microcontroller.
A multi-track step sequencer you edit from a browser while it plays in your rack.
stepbridge/ · Early alpha release →
Up to four independent tracks, each with its own length, time signature, scale, and generative tools. Two tracks output CV pitch and pulse gate; all four send MIDI note-on/off over USB. Patterns are edited live in a WebSerial browser UI — draw notes, set gate lengths, arpeggiate, quantise to scale, and let pitches drift over time Stockhausen-style. Eight save slots persist across power cycles.
Early alpha. The Web UI is feature-complete for the core sequencer. Hardware panel controls are partial — most creative editing is Web UI only for now, with full panel support planned for a later release focused on performing rather than programming. See
stepbridge/README.mdfor the full picture.
Quick start: flash stepbridge.uf2, open stepbridge/web/index.html in Chrome or Edge, click Connect.
| Directory | Contents |
|---|---|
stepbridge_v1/ |
The original StepBridge — SysEx/WebMIDI architecture, archived for reference |
Hard-won lessons from building on the RP2040's dual-core architecture with USB and flash writes — documented here so the next project doesn't rediscover them.
| File | Contents |
|---|---|
NEW_PROJECT_PLAYBOOK.md |
Architecture decisions, USB-MIDI freeze root causes, ADC crosstalk findings, flash-safety checklist |
RP2040_dual_core_flash_safety_notes.md |
Deep-dive on multicore flash writes: vtable/ISR pitfalls, the hand-rolled pause mechanism, copy_to_ram verification |