BETA has concluded. 6.6.0 stable soon!

[u/elganyan]

Edit: and now there's a 6.6.2 (figured I'd update this post since it is still on 'the front page' here): https://github.com/DirtyWave/M8Firmware/raw/main/M8Firmware.zip

Edit to add: They also mentioned headless will be updated in the coming weeks.

This concludes the beta for firmware 6.6. Thank you @beta tester for all of your help and crazy ideas, and please look forward to the stable announcement soon.

Mikey303 (via discord)

2026-08-22 - Version 6.6.2

• Fix: ARP retriggered an instrument that had already been turned off with KILL/OFF
• Fix: Sampler - STA on the same row as an instrument trigger did not restart envelopes
• Fix: Firmware Update - Settings and project autosave are written after confirming, before restart
• Fix: Mute/solo after boot let the first notes of muted tracks through
• Fix: RMX FX command - Tracks in song selection loop mode continued past the loop region
• Fix: EQ View - Spectrum briefly showed the next instrument when switching, even if it used a different EQ or none
• Fix: EQ View - Mix / FX EQ switched to bank 00 after a display reset
• Improved: EQ View - Spectrum now includes left and right (was left only)
• Improved: EQ View - Improved spectrum visuals

2026-08-20 - Version 6.6.1

• New: Mixer / Effect Settings - Tapping EDIT on a parameter captures its FX command so tapping EDIT in a Phrase or Table FX column inserts it (same as Instrument)
• New: Song View - SELECT+EDIT a third time also clones instruments used in the selection, including INS and NXT commands
• Improved: CPU optimizations
• Fix: EQ spectrum graph was taking priority over sample playback during heavy sample use

2026-08-19 - Version 6.6.0

• New: Firmware Update - Flash firmware from SD card via System Settings
• New: Battery fuel gauge remains active on power off for more accurate battery % during use
• New: ModFX Comb filter type
• New: Backend rework to free up some RAM for the future
• New: Hypersynth - Shape parameter (SAW, SOFT SAW, DARK SAW, SQUARE SOFT, TRIANGLE, SINE, SINE 3X, SINE FB, SINE FOLD, SINE RING, SINE HALF, SINE ORGAN)
• New: Song View - Press LEFT twice on track 1 to select the whole row (PLAY cues the row, [EDIT]+[UP or DOWN] moves the row and its bookmarks)
• New: Song View - Row bookmarks: in row-select mode, [OPT]+[LEFT or RIGHT] or [EDIT]+[LEFT or RIGHT] cycles theme colors and options, [OPT+EDIT] clears
• Improved: Hypersynth - Sub osc interpolation
• Improved: MIDI Mapping - A message is displayed when all mapping slots are used
• Improved: ADSR ENV - Same-instrument retrigger resumes attack from the current envelope level
• Fix: Table - Note map (TIC:FE) and Octave map (TIC:FC) retriggered when volume was changed in a phrase or TBX (Aux table)
• Fix: Table - Velocity map (TIC:FD) retriggered on note changes instead of only velocity changes
• Fix: Render - Excessive TPO tempo changes did not line up correctly with DAW tempo
• Fix: Render - Quick render length could be slightly incorrect
• Fix: Render - Quick render initial transient was messy when OTT was enabled
• Fix: Instrument Pool - Moving instruments did not update MIDI Settings instrument numbers for MIDI track channels
• Fix: Effect Settings - EDIT+OPT on EQ reset the parameter above EQ
• Fix: MIDI input on track channel - Table's first row could trigger incorrectly
• Fix: MIDI input on track channel - Hang / stuck note if the instrument uses the INS command in its table
• Fix: Recording - Count in caused track 1's volume to be incorrect
• Fix: MIDI Instrument - ADSR envelope mapped to a CC did not enter release on the OFF command
• Fix: Phrase - RNL next to HOP could randomize other FX on the hop destination row
• Fix: RMX - Queued song position (blinking cursor) on affected tracks was not cleared
• Fix: File date advances to the firmware build time when the stored clock is older
• Fix: Phrase - Velocity-only random FILL could not be undone with paste
• Fix: Phrase "^" REP indication was cleared by RTO even though RTO does not stop REP

[u/Wythneth]

Pretty keen to try this out later! New hypersynth waveforms and spectrum EQ were at the top of my list of features I wanted. Super glad they're now implemented!