SLOOP DX7 Banks
Test builds of SLOOP with a DX7 voice engine holding twelve voice banks in flash, loaded from a web editor or sent from Dexed, plus a key-velocity setting and latching punch-in effects.
Brick risk. Flashing this carries a known, documented risk of damaging the device.
- Distribution
- Browser installer (WebMIDI / WebUSB)
- License notes
- Inherited from SLOOP and Felucca. The DX7 engine follows Dexed's msfa core (Apache-2.0).
- Source
- github.com https://github.com/majnikool/sloop-fm1/tree/majid
- Homepage
- majnikool.github.io https://majnikool.github.io/sloop-fm1/webapp/installer/
- synth-engine
- fm
- editor
- performance
Description
The fork is a branch of SLOOP, not a release of it, and its builds are marked as test builds and pre-releases. No DX7 voice data ships in the firmware; banks are loaded as .syx files. The author's notes say the DX7 voices play dry, as the stock firmware plays its own, and that moving between this build and plain upstream SLOOP can erase the first eight banks, so a backup from the editor comes first. The work was also offered to the SLOOP repository as pull requests, which are now closed (SLOOP itself later gained a 6-op FM engine with DX7 import).
Install notes
Web installer in Chrome or Edge over USB, or sloop-2.5-b28.fwsc from the release with tools/fm1_install.py. The release notes say nothing is erased across builds 19 to 27, and advise backing up from the editor before switching to plain upstream SLOOP.
Version history
| Version | Date | Notes |
|---|---|---|
| v2.5-b28-test | 2026-10-09 | Pre-release. DX7 voices play as the patch is, with no level trim. |
| v2.5-b27-test | 2026-10-09 | Pre-release. Adds a KEY VELOCITY setting and plays picked DX7 voices dry. |
| v2.5-b26-test | 2026-10-09 | Pre-release. |