FM-1 firmware · 1.1
HERA
A chord groovebox after the Roland J-6: 100 chord sets on the keys, phrase styles, a 64-pattern step sequencer and a Juno-style synth.
- Made by
- Ben Badio
- Released
- October 21, 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 HERA does
- HERA turns the FM-1 into a chord machine with 100 chord sets mapping a chord to every key.
- The 4-voice Juno-style synth offers 64 sounds across pads, strings, brass, keys, bass, leads, plucks and effects.
- Nine phrase styles with twelve variations each play arpeggios, rhythms, chord and strum parts while you hold the keys.
- The step sequencer holds 64 patterns of up to 64 steps, with ties, shuffle, step tools and real-time recording.
- Tap SEL for chord mode, ARP for phrases, and shape the sound with filter, envelope, delay and reverb on K1 to K4.
- Press REC then PLAY to record what you play into the step that is flashing, with punch in and out.
- SAVE keeps the current pattern and GLO + SAVE saves all 64 in the FM-1's flash.
- HERA works over USB MIDI, sending and receiving notes, program changes and clock, and it also runs in your browser.
Its modes
- Play
- Shows the chord or note you just played, the chord set, the sound, the phrase and a live scope.
- Chord map
- Shows which chord sits on which key and lets you browse all 100 chord sets with PRESETS.
- Phrase
- Names the style and variation and draws a piano roll of the phrase for the chord and strum styles.
- Sequencer
- Edit 16 steps at a time, with chords, notes, ties, per-step phrases and the last step in view.
- Patterns
- Shows all 64 patterns on one grid so you can pick or queue the next one.
- Sounds
- Browse the 64 sounds in 8 banks while the keys keep playing.
- Effects
- Set the delay and reverb levels and times.
- Settings
- Choose a setting with PRESETS and change it with K1, including the RESET group.
What Les checked
HERA v1.1Scanned 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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Les is independent and not affiliated with M-VAVE or the firmware authors. M-VAVE and FM-1 are trademarks of their owners.