MIDISTOMP
Firmware for Zoom MS-50G / MS-60B / MS-70CDR and G-series (Zoom)
Patched OS for the Zoom MS-50G, MS-60B and MS-70CDR, built from your own MS-50G 3.10 updater, that adds MIDI program change, MIDI CC, MIDI clock with Start and Stop, a tempo screen and footswitch hold options.
Brick risk. Flashing this carries a known, documented risk of damaging the device.
- Distribution
- Patches a stock file you supply
- Requires stock
- 3.10
- Source
- github.com https://github.com/matujuice/zoom-ms-midistomp
- midi
- performance
- fx
- ui
- patch
Description
A builder program writes a patched updater from Zoom's official MS-50G 3.10 updater, which you then run with Zoom's own flasher; it refuses any other file and never rewrites the bootloader, so update mode stays available for recovery. Added features include program change for loading patches, CC control of the six effect slots and every knob, a MIDI menu for per-message receive and channel, tempo set by clock, knob or tap with a tempo lock across patches, and a HOLD FOR footswitch option for tuner, tempo or momentary use. Tested only on an MS-60B flashed with the MS-50G firmware; the MS-50G and MS-70CDR are untested. It pairs with the author's custom effects, which follow its tempo and Start and Stop. The repository also holds a parser and build tool for the pedals' updaters.
Install notes
Download Zoom's official MS-50G 3.10 updater, drag it onto MIDISTOMP-builder.exe from the releases page and run the updater it writes. Zoom's own updater takes the pedal back to stock. The author warns that flashing modified firmware can brick a pedal and points to docs/safety.md in the repository.
Version history
| Version | Date | Notes |
|---|---|---|
| v1.0 | 2026-10-09 | Adds the MIDI menu, tempo screen, tempo lock and HOLD FOR options. |
| v0.6 | 2026-10-09 | |
| v0.5 | 2026-10-09 | |
| v0.4 | 2026-10-08 | |
| v0.3 | 2026-10-08 | MIDI clock sets the tempo. |
| v0.2 | 2026-10-08 | Adds MIDI program change and CC. |