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FM-1 firmware · latest

FM1_IGLOO_OSR

A small musical walking game on an ice field, where the wind, a drone and your footsteps make the music.

Made by
Obsimo (OSR Records)
Released
October 30, 2026
Install
On GitHub
Scan
On hold: the file changed after it came out · Oct 31 What we checked
Last checked
October 31, 2026

What FM1_IGLOO_OSR does

  • Each place you reach wakes the synth up in its own way, so walking is how you change the music.
  • The synth voice holds subtractive, FM and plucked engines, a rhythm sequencer and a kick with sidechain.
  • ENV switches the instrument between synth, kalimba and ice flute, and SCL changes the chord grid.
  • K1 to K4 set the levels of the wind, the drone, the steps and the synth.
  • EDIT, PLAY, SEQ and REC walk you in four directions, LFO is the action button and HOME takes you back.
  • ALGORITHM sets the sky to a day and night cycle or a fixed sky, and PRESET picks the sound.
  • A quest runs through it with a captain's journal, a lighthouse to relight, an ice flute, ten outfits and nine radio tapes.

Its modes

The walk
You cross a thirty by thirty ice field with Obsimo and the dog Seito, through day and night, while wind, drone and footsteps make the music.
The igloo
You go back home, where the synth lives.
Fishing
You fish at a hole that bites on the beat.
The ice cave
You play a cave of tuned icicles.
The forest
You brush pines that ring as you pass.
The lighthouse
You turn the lighthouse by playing.
The ice rink
You glide across the ice instead of walking.

What Les checked

FM1_IGLOO_OSR latestScanned October 31, 2026

What we checked for

  • The file is exactly the one its author published
  • It opens cleanly as an FM-1 firmware, nothing damaged
  • It doesn't show up on your computer as a keyboard, mouse or other input device
  • It doesn't show up as a USB drive or network adapter
  • Its text mentions no computer command tools, like PowerShell, Terminal or a download command

What we found

  • MIDI and audio, as expected
  • The file changed after this release came out, under the same version

StatusOn hold: the file changed after it came out

Les scans every firmware here whose file is public, and shows what it checked and what it found. A scan lowers the risk; it can't rule it out. This firmware is made by its author, not by Les or M-VAVE. Back up first, and install at your own risk. How Les scans firmware

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