FM-1 firmware · 1.4.0
J6
A six-voice polysynth after the Roland JUNO-60, with its chorus, an arpeggiator and 16-step recorder, 56 factory sounds and a browser editor.
- Made by
- JackieAlacrity2373
- Released
- October 29, 2026
- 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 J6 does
- J6 turns the FM-1 into a six-voice polysynth after the JUNO-60, playable from the 27-key touch keyboard.
- Each voice has one oscillator mixing saw, pulse, sub square and noise through a resonant low-pass filter that self-oscillates.
- A shared ADSR, an LFO with delay and a stereo chorus with four settings shape the sound.
- Play in Poly, Unison with spread or Solo, with portamento, hold and an arpeggiator running up, down or up-down over one to three octaves.
- Record up to 16 steps with rests using REC, then loop them with SEQ at the tempo set on the GLO page.
- Four knobs edit whatever the current page shows, and pressing a page button again flips to its second half.
- Over USB it takes notes, velocity, pitch bend, pressure, sustain and program change, and LINK lets one FM-1 drive another.
Its modes
- SOUND
- The HOME page shows the sound name, play mode, arp, hold and sequencer state plus the 16-step pattern strip.
- DCO
- Mix the saw, pulse, sub and noise sources, and set range, pulse width and PWM source.
- VCF
- Set cutoff, resonance, envelope amount and key follow, with high-pass, envelope polarity, VCA mode and level on the second half.
- ENVELOPE
- Shape attack, decay, sustain and release for the filter and the volume together.
- LFO
- Set the wobble rate and delay and send it to pitch and to cutoff.
- CHORUS
- Choose the chorus setting, the play mode, portamento glide and unison spread.
- GLOBAL
- Set tuning, velocity, arpeggiator direction and octaves, plus tempo, screen theme and LINK.
What Les checked
J6 v1.4.0Scanned October 31, 2026
What we checked for
- The file is exactly the one its author published
- It's the same file we saw when this release first came out
- 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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How to use grooves in Ableton 120:42 · 4 STEPS
How to use the arpeggiator0:37 · 4 STEPS
How to make a deep bass0:38 · 4 STEPS
How to make an evolving pad0:44 · 4 STEPS
How the Mod Matrix works0:39 · 3 STEPS
How to morph between two versions of a pad0:40 · 4 STEPS
How the two wave knobs on a PolyBrute oscillator work0:42 · 4 STEPS
How to add swing0:34 · 2 STEPS
How to change the bells on the FM-1 AMB-10:36 · 3 STEPS · AMB-1
How to turn the FM-1 AMB-1 into a drone0:37 · 3 STEPS · AMB-1
How to steer the melody on the FM-1 AMB-10:36 · 3 STEPS · AMB-1
How to use the arpeggiator0:41 · 4 STEPS · STOCK
How to play a dominant 7th on the FM-1 with ChoralRoot0:33 · 3 STEPS · CHORALROOT
How to play minor 9th chords with one finger on the FM-1 with ChoralRoot0:37 · 3 STEPS · CHORALROOT
How to play a I-vi-IV-V on the FM-1 with ChoralRoot0:39 · 4 STEPS · CHORALROOT
How to get the Casio CZ sound on the FM-1 with Melodee0:34 · 3 STEPS · MELODEE
How to get a Prophet-5 sound on the FM-1 with Melodee0:40 · 4 STEPS · MELODEE
How to record without quantize on the FM-1 with Melodee0:28 · 2 STEPS · MELODEE
What every FM-1 control doesPick the firmware on yours, then tap any control to see what it does.
How to add glide to one step0:38 · 3 STEPS
How to play a random sequence0:28 · 2 STEPS
Les is independent and not affiliated with M-VAVE or the firmware authors. M-VAVE and FM-1 are trademarks of their owners.