M-VAVE FM-1 firmware

sloopDX

SLOOP workflow with a single DX7 engine ported from Dexed. by zvenson

sloopDX preview from its author
Preview by zvenson

About

sloopDX keeps SLOOP's live workflow and replaces its engines with one six-operator DX7 engine, every voice parameter editable on the unit, with room for 256 voices and 128-step patterns.

Synth

Compatibility

  • M-VAVE FM-1Declared by the author · latest 3.4 · needs stock V15

Member “works on my unit” reports per release come with the community layer.

Latest release upstream

v4.0 · v4.0 · 18 Oct 2026 · 5 releases listed

  • felucca-4.0.fwsc · 596 KBSHA-256 133aa53357e9fc2e3b498ec798121d09d971eb4a4a63bc1a240e8e3728bd8dec

Synced from the author’s repository on 29 Oct 2026. Files stay with the author; Maru does not host them.

Install and safety

Beta. The author marks this release as beta.

Install with the author’s installer

Maru offers its own install only for open-source releases with a complete install record, after its installer has completed a full install and restore on a physical M-VAVE FM-1.

  • Put the unit on stock V15 first, and keep your own copy of the stock file from M-VAVE’s downloads so you can go back.
  • Back up your presets with the current firmware’s own export before installing.
  • Rescue: Hold OCT− alone while switching on to start in USB rescue. (fm1-editor.com directory).
  • If something goes wrong, follow the recovery ladder.
  • GitHub's latest tag still reads v2.6 while the author's directory entry lists 3.4; check the installer page for the current build.
  • The author also maintains the FM-1 Firmware Hub.