M-VAVE FM-1 firmware

SLOOP

Four-track groovebox with 37 drum kits. by 3dSam

SLOOP preview from its author
Preview by isod89

About

SLOOP is a groovebox built on Felucca: projects, patterns and songs, a dozen engines including a six-operator FM that reads DX7 voices, and a drum section with 37 kits.

Its releases include a standalone editor page for presets and a sound library.

GrooveboxDrums

Compatibility

  • M-VAVE FM-1Declared by the author · latest v2.6 · needs stock V15

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

Latest release upstream

SLOOP 2.8.3 · v2.8.3 · 27 Oct 2026 · 10 releases listed

  • sloop-2.8.3.fwsc · 596 KBSHA-256 5444afd3c69c409352e1aed35a56205f13f11e60790de146593c4618a43f3528
  • sloop-editor-2.8.3.html · 943 KBSHA-256 25fe6043084b6d6bdd0529699e2b8cf6f4ba186f7d04801c2564882dabb76f03

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.
  • Returns to stock through M-VAVE's M-UPGRADE.