FM-1 firmware · v0.1.2
CRT-4
A four-track groovebox that plays the sound chips of nine game consoles and home computers, with drums plus three tracks of each machine's sounds.
- Made by
- devrvega
- Released
- October 16, 2026
- Install
- On GitHub
- Scan
- Scanned, nothing harmful found · Oct 31 What we checked
- Last checked
- October 31, 2026
What CRT-4 does
- You play nine consoles, from the Atari 2600 and C64 to the SNES, PlayStation and N64, each with its own sounds.
- Every console gives you two drum kits and sixteen sounds: four basses, four keys, four leads and four of its own.
- Track 1 holds the drums and tracks 2, 3 and 4 play the console's sounds with its echo or reverb.
- You write sixteen-step patterns live with REC, step by step, or by pressing the white keys as steps.
- Patterns chain up to 64 long, and sixteen chords chain alongside them, one each time a pattern starts.
- Hold FX and a white key for repeats, stutter, reverse, fills, solos, fades and more, written in as you play.
- Each console keeps its own song, saved by itself a few seconds after you stop, or at once with SAVE.
Its modes
- Patterns
- Pick the next of sixteen patterns, build a chain, and set tempo, swing, length and key.
- Steps
- Turn the white keys into a track's 16 steps to write and edit notes, lengths and locks.
- Sound
- Set the four knobs of the track's sound, or the drum part's tune, decay, tone and level.
- Track
- Set the track's level, pan, echo or reverb send, and glide.
- Chords
- Choose from sixteen chords, chain them, and set a track to follow them.
- Mixer
- Set the four tracks' levels, mute them, or pick one.
- FX
- Hold white keys for punch-in effects and set the console's echo or reverb.
- Setup
- Set tune, MIDI out and clock, and bring back the console's demo song.
What Les checked
CRT-4 v0.1.2Scanned 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.