Each is that firmware's own code, built for the browser. Its saved work stays with it when you switch.
Screenshots from the FM-1 Firmware Hub, by the firmware authors.
WAV, AIFF or MP3. Up to 16 loops and about 7 seconds per slot. To play them, choose BREAK with the ALGORITHM knob, press EDIT until the LOOPS page and pick a loop with KNOB1.
Knobs: drag up or down. Keys work with several fingers and glide. Hold SEL together with another button for combinations. Hold latches buttons until you tap them again; on a computer, Shift + click does the same.
Space — PLAY, Enter — REC, Shift — SEL, Esc — HOME, Z / X — octave. Q–I and A–K are the white keys; 1–0 and “−” the black ones. ↑ / ↓ turn SELECT.
xBR smooths the pixel screen like the filters of retro game emulators; switch it off to see the original pixels.
SAVE keeps patterns in this browser, and loops stay on this device too. For a larger working area, add the page to your phone’s home screen.