Les

FM-1 firmware · 0.0.4-beta

Smileyface

An acid bass line machine: draw a sixteen-step pattern or roll a random one with a button, then twist the knobs.

Made by
pbarilla
Released
October 30, 2026
Built on
Chipbox
Install
On the FM-1 Firmware Hub · source on GitHub
Scan
Scanned, nothing harmful found · Oct 31 What we checked
Last checked
October 31, 2026

What Smileyface does

  • Smileyface turns the FM-1 into an acid bass line machine with filter sweeps, accents and slides.
  • Each project holds 16 patterns of 16 steps, plus the sound and the tempo.
  • Write notes with the keys, hold ENV for an accent, hold SEL for a slide, press EDIT for a rest.
  • Six pages of knobs follow a classic acid panel: cutoff, resonance, envmod, decay, tune, drive, tracking and more.
  • Pages 5 and 6 are switches for wave, sub osc, muffler, sweep speed, hi-res, poles and accent.
  • Press LFO for a random pattern, ARP to nudge a few steps, and FX to undo or flip back.
  • Press SAVE, or stop touching it for two seconds and it saves itself.
  • Send MIDI clock and the FM-1 follows it, and you can play it from a keyboard over USB-MIDI.

Its modes

STEPS
Write your 16 step pattern with the keys, adding accents, slides and rests as the cursor moves along.
PLAY
Use the 16 white keys to cue patterns, chain them in order and accent everything at once.
Projects
Hold HOME to see your 12 projects, open one, copy it into a free spot or start it over.
Menu
Press GLO and HOME together for Factory Reset and Roll The Dice.

What Les checked

Smileyface v1.0.0Scanned 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

StatusScanned, nothing harmful found

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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