Nauclerus1.0.0

1.0.0 - 2026-11-05

• Stable release retaining the 0.25.1 development corrections below.
• Accept Puya P25Q80 (0x856014) and UC25HQ80 (0xB36014) SPI flash IDs; unknown IDs retain RAM-only saves. Minimal allowlist fix from DEADACTIVE/hortator drum-v1.0.1, without upstream feature or format changes.
• Advertise USB product Nauclerus FM-1 for conventional FM-1 discovery.
• Recognize FM-Tangram in both installers; Web MIDI accepts unique input/output pairs differing only by trailing numeric suffixes and rejects ambiguous pairs.
• Preserve firmware identity FM-1_25000, manufacturer, VID/PID, shared update loader, OTA/SysEx protocol, DSP, sequencers, presets and project formats.
• 55 compatibility micro-tests, production build and package/loader integrity checks passed. Owner-confirmed physical switching: 0.25.0 → 1.0.0, 1.0.0 → AMB1 through The Firmware Hub, AMB1 → 1.0.0 through our Web installer.
• Exact artifact and validation scope: [release notes](docs/RELEASE_NOTES_1.0.0.md).
• Grids WRITE preserves each target track's LEN (1–64), writes snapshot triggers and accents only through LEN−1, and clears unused steps beyond LEN. DIV 1/32, SRC STEP, snapshot generation, target selection and transport restrictions remain unchanged; live Grids and Euclidean channel lengths are unaffected.
• ACID WAVE 2 is now TRIANGLE, using the existing Q15 triangle oscillator converted to Q24. All four choices are selectable in order: SAW, PULSE, TRIANGLE, MORPH, with the existing waveform crossfade. PWM applies only to PULSE (ID 1); TRIANGLE dims/disables MORPH editing and preserves its stored value. Remove the former WAVE 2 preset width initialization; WAVE 1 still starts at 50%. Saved WAVE 2 values now select TRIANGLE. Two-bit encoding, storage layout, MORPH ownership and existing ACID gain remain unchanged.
• Update VIOLET (ID 8) to background #905BA8 / ink #FFFFFF and VIOLET INV (ID 9) to background #FFFFFF / ink #905BA8.
• Append PINK (ID 12), background #D397CA / ink #000000, and PINK INV (ID 13), background #000000 / ink #D397CA. Fourteen selectable themes in order: ORANGE, ORANGE INV, BLUE, BLUE INV, WHITE, WHITE INV, YELLOW, YELLOW INV, VIOLET, VIOLET INV, RED, RED INV, PINK, PINK INV. Existing IDs 0–11, default, legacy mapping, THEME_TAG encoding and settings format remain unchanged.
• Simulator LCD palettes come from the shared firmware renderer; no JavaScript palette is added. The published 0.25.0 simulator remains unchanged.

0.25.0 - 2026-10-28

• Stable release of the accepted RC13 implementation; no additional DSP changes.
• Fix cached MENU/ABOUT transport headers, same-frame modal MIDI Learn/effect cancellation and REMIX held-step accents.
• Correct obsolete release test references using independent accepted-firmware evidence; retain integrity guards and test tolerances.
• Four-slot BIP / magnitude-only UNI+ / UNI− routing; compatibility and source IDs preserved.
• Source-matched WASM simulator and interactive manual with Graphite/Champagne/Amber styling.
• Web installer requires exact stable package SHA-256, acknowledgement and explicit confirmation.
• ACID default-render golden updated only after byte-identical RC11/RC12/RC13 comparison; all other goldens and thresholds unchanged.
• All four LFO routing slots use unsigned 0–100% DEPTH for UNI+/UNI−. Mode alone selects direction; negative UNI values retain magnitude without phase reversal. BIP signed-depth arithmetic and audio remain unchanged. Mode switching, MIDI Learn, RC12 project loading and legacy Motion/lock playback normalize UNI magnitudes; parameter IDs, project/Song formats and stored event bytes remain unchanged.
• Four LFO DEST slots now independently select L1BI/L2BI, L1U+/L2U+ or L1U-/L2U-. Source fields 0/1 retain exact BIP signed-depth/rounding; 2–5 add unipolar modes. Negative unipolar depth reverses trajectory without reversing UNI offset direction. All source readers, meters and OCT rate-mode selection use the correct LFO bit.
• Existing parameter IDs/FDRF size remain unchanged. Old projects and default slots remain BIP; presets do not reset routing. MIDI Learn expands SRC to six choices. Accumulation, base restoration and existing live-routing Song ownership remain.
• Owner's explicit 2026-10-28 declaration resolves the ORB provenance record: independent creation and authorized redistribution; Future Retro Orb is conceptual inspiration, not copied pattern data. Old transcription wording is superseded, not hidden. Canonical values and their pinned SHA-256/production packing are unchanged.
• ACID/filter/oscillator DSP, all accepted RC11 sound/UI behavior outside the routing controls, presets, project/Song layout, USB identity and loader are preserved.
• ORB Remix: all 256 canonical mappings from X0X-RMX v1.1.0, identity A1 and independent 16-step block mapping over 64 steps. GLOBAL DRUM serves all current drum models; each physical ACID track retains its independent Bass selection. Notes, ACID lookahead, Motion and locks use mapped sources while timing, recording and manual editing remain chronological. Grids still bypasses mapping.
• REMIX page between PATTERN and MOTION: K1/K2 draft Bank/Pattern, K4 SET or OCT+ confirm; K3 ON/OFF affects only the confirmed selection. Playing changes latch at safe track-step boundaries; STOP retains explicit queued edits. Song rows use their slot-owned configurations.
• Compact validated project extensions for Remix and per-track TB-3PO settings/seeds. Existing FDRF records remain 3840 bytes; legacy/invalid extensions load safe defaults without rewriting old phrases. Existing lock-bank transactions, storage allocation and Song row structure are preserved.
• TB-3PO port of the actual pinned X0X-RMX generator:22 scales, deterministic motif/phrase generation, restrained manual/automatic mutation, independent physical-track settings and safe playing edits. ARP routes to GENERATE/SCALE on ACID and retains GRIDS on drums. OCT NEW/MUTATE works with KEYS and ENV/STEPS modes while deliberate held editing combinations retain priority.
• ACID: SAW, variable 5–95% PULSE and the Sharkfin/Trapezoid/Notch-Trapezoid MORPH family; smoothed waveform controls and one-MORPH-voice arbitration. Stable old WAVE IDs prevent legacy MORPH/PULSE confusion; legacy SQUARE becomes 50% PULSE and old fixed 25% PULSE becomes the nearest width setting.
• FASTSLOW, UID 152, first ACID preset in MODERN: TUNE −12, DECAY 50, CUTOF 80, RESO 30, ENVMD 60, ACCNT 64, PULSE, GATE 40; default width 64. New untouched ACID LEVEL 104 (−4 dB); saved/user levels remain.
• Final four-page ACID EDIT layout preserves all 15 controls, including GATE and additional MORPH, with the final column empty. SAW disables MORPH editing while retaining its value. Pulse preset audition cancellation restores the previous manual width/MORPH.
• LFO destination A.MOR appended without renumbering existing destinations. Either/both LFOs and all four routing slots can modulate PWM/MORPH around the restored manual base, with signed depth.
• ACID resonance-feedback high-pass improves measured bass retention without raising global gain. Existing oscillator geometry is retained. Subjective resonance/filter character remains an owner-accepted limitation, not a claim of X0X-RMX/analogue sonic equivalence.
• Grids WRITE: stopped OCT+ captures a deterministic 64-position two-bar MAP/EUCLID snapshot into eligible drum tracks, sets LEN 64/DIV 1/32/SRC STEP, retains sounds and allows ordinary Drum Remix. K4 clockwise on GRIDS page 2 assigns T1–T3 kick/snare/hat sources. WRITE-available OCT+ cue added.
• HOME/GLO: short GLO opens/closes MENU, held GLO keeps MUTE; held HOME enters Settings and exits that family to real HOME. Short HOME cycles its three Settings pages; from MENU/normal overlays it cancels directly to real HOME. Release after a long press does not also tap.
• MENU SEL/SCL ENTER for dedicated screens, retaining OCT+ ENTER, OCT− BACK and SELECT navigation. PROJECT OCT− LOAD / OCT+ SAVE reuse the existing guarded actions.
• Twelve device color themes: ORANGE/INV, BLUE/INV, WHITE/INV, YELLOW/INV, VIOLET/INV, RED/INV. RC11 integrates Orange at existing IDs 0/1; other IDs/preferences/default remain compatible.
• Mr. Roboto's development/modifications/remix credit added to ABOUT; original attribution preserved.
• Linux host harness portability retained with unavailable instruction counters explicitly skipped; minimal song timing and DSP signed-shift undefined-behavior fixes, without changing golden references.
• Independently adopted Nauclerus security baseline with immutable pins and fail-closed source/reference guards; loader identity, USB compatibility and recovery implementation remain unchanged.
• RC11 acceptance: owner reports 10/11 physical checks PASS; the remaining subjective resonance concern is accepted for stable. No per-item hardware log is invented. Stable identity/package and public release preparation remain pending separate authorization.

0.25.0-rc.1 - 2026-10-27

• Nauclerus local release candidate: canonical ORB Remix on eight tracks, staged SEQ > REMIX APPLY, Song ownership, project persistence and chronological recording.
• Ten color themes; preserved Linux regression portability and focused song timing/DSP correctness fixes.
• Independently reviewed local security baseline, strict source/reference guards and unchanged update loader. No hardware installation or public release.

0.24.0 - 2026-10-25

• Parameter locks (Elektron style; spec docs/superpowers/specs/2026-10-24-parameter-locks-design.md):
• ENV: the white keys as the selected track's steps on every page. ENV (unused before) toggles STEPS / TRACKS on its release, its LED lit and a padlock in the top bar (left of the battery, every page) in STEPS; the mode is global, not saved (off at power-on). In STEPS the keys tap / hold steps as on SEQ on HOME, TRACKS (armed too), SOUND, LAYER, FX, LFO and COMP, and play no drum (REC ALL records no hits then); ENV held + OCT+ / OCT- changes the bank; OCT+ held + a step its accent, OCT+ alone and OCT- keep their page's job (SOUND to LAYER on OCT+'s release, LAYER back, the LFO's RATE MODE). ENV turns KEYS off and SCL STEPS off. ENV off (TRACKS) is the keys exactly as before. (Device test 2026-10-25: ENV, and OCT- clearing a held step's locks, sometimes needed a second press: the press time kept the clock's own bit 1, the "used" flag.)
• Locks: in STEPS, hold a step and turn any knob MOTION can record, on HOME, TRACKS (LEVEL, PAN), SOUND, LAYER, FX, SLICER, RESON, FILTER, LFO and LFO DEST: that step gets its own value for that knob (LOCK STEP 5 on top, the cells show the step's values, a locked one inverted; the knob itself and its base untouched; a turn right after the press works, the release then toggles nothing; HOME's strip, too narrow for it, says LOCK 5). Knobs MOTION can't record do nothing while a step is held. Step held + OCT- tap: that step's locks on this page's knobs cleared (STEP 5 LOCKS CLEARED); OCT- held 0.6 s: all its locks (STEP 5 ALL CLEARED); OCT- with no step held keeps its job. LOCKS FULL at 1024 events. SEQ STEP keeps PROB / RATCH / ACC on a held step; a song's rows are not edited.
• Playback (motion.c): a lock sets its knob for its own step only, on top of what the knob holds there (its value, or motion's held value; an LFO on it modulates round the locked value), and the knob snaps back on the next step. A step that is off keeps its locks dormant. Locks play whatever MOTION's PLAY says; MOTION CLEAR leaves them; CLEAR TRACK, TOOLS CLR* and INIT* remove them. A SONG row plays its own slot's locks and none leaks into the next row; STOP, a model change, a MIDI LEARN CC and a preset SAVE see the knob's own value, never a lock's. A/B renders: build/drum_renders/locks_off.wav, locks_on.wav (DECAY and CUT locked on steps 4 8 12 16).
• Shown: in STEPS the footer's step strip underlines each locked step of the bank shown (a song's row: its slot's); SEQ > MOTION's KNOB 2 / 3 show the selected track's MOTION (recorded events, was EVENT) and LOCKS counts. Screens: build/ui_shots/locks/ (sound_held, foot_bank1, motion_counts).
• MOTION: 1024 events per project (was 128), shared with the locks, kept in the project's lock bank (its own flash object, saved just before the project record, which links it: a save cut by a power loss keeps the last whole pair). Projects are now "FDRF"; FDRE and every older format load with their motion as before. 0.23.x reads a project saved now as an empty slot (LOAD FAILED at power-on; downgrade safe, not supported). A bank that can't be read (wrong inside, another slot's, not the one the record links) loads empty and the FM-1 says LOCKS LOST; it is never misread. A step's events are found by a binary search in the audio ISR (no scan of every event).
• Lock banks: four new flash objects (OBJ_LOCKS0..3, two sectors each at 0xD4000..0xDBFFF, storage.c; user decision 2026-10-24, frozen baseline moved to frozen-base-10 for that object-table change). They take the last 32 KiB of user sample slot 3: USR3 now holds up to 48 KiB (USR1 / USR2 80 KiB as before). A longer USR3 is shortened in flash once at power-on, before anything writes the banks (USR3 SHORTENED TO 48K; zones past 48 KiB dropped, one across it cut, its CRC new; a power cut during that one rewrite empties USR3, nothing else). If that rewrite fails (a flash error), nothing writes the lock banks that boot (USR3 CLAMP FAILED; SAVE and RENAME say so and keep the project in RAM), so an older Hortator never plays them as USR3's sound. A RENAME of a project whose bank is only in RAM (an older project converted at power-on, or after a SAVE ERROR) writes the bank before the record.

0.23.3 - 2026-10-23

• Knobs crank faster: MENU > ACCEL ON (the default) now speeds a turn up from about 12 clicks a second, in fractions of a step (x2 at 20 clicks/s, x4 at 40, up to x8 on a wide value: upstream Felucca 1.1.5's caps, 276f72a), so a 0..127 value takes ~65 clicks at 20/s and ~24 at 60/s (before, and upstream Felucca: 127 and 64). A slow turn and single clicks stay one step a click; a reversal's first click is one step. Lists of names (MODEL, TYPE ..) never speed up (as upstream), the PRESETS list at most x4; ACCEL OFF stays one step a click (tests/accel_test.c).
• USB name: the FM-1 now shows up as Hortator (USB MIDI and audio: in a DAW, AUM, the MIDI port list) instead of Felucca: the app's USB product string (firmware/src/usb_app.c STR2, 18 B "Hortator"; user decision 2026-10-23, frozen baseline moved to frozen-base-9 for that one string). While an update is written it still shows up as Felucca Update (the update loader, unchanged); the manufacturer string, VID/PID and the loader are unchanged. The web installer, the editor, tools/fm1_install.py and tools/fm1_sample_upload.py find a port named Hortator or Felucca (older firmware), so updating from any earlier build works as before.
• MENU > COLOR: every colour now comes in both polarities, BLUE INV (blue on white) and GREEN INV (green on black) join RED INV (red on black); the row shows the theme's name as its value (RED, RED INV, BLUE, BLUE INV, GREEN, GREEN INV, in that order) instead of the boxes. A stored colour loads as the same theme as before (the new inverses take new indexes; an older Hortator shows them as RED).
• Step keys: holding a step no longer turns it off. A step toggles only on a short tap (let go within 0.3 s, no knob edit meanwhile), on the release. Held 0.3 s an OFF step turns on there and then (lit, ready to edit); an ON step stays exactly as it was. While a step is held on STEP, KNOB 1 / 2 / 3 set its PROB / RATCH / ACCENT (KNOB 3: a click right ACC on, left off), shown in the knob boxes and the STEP n PROB RATCH n ACC line (once held 0.3 s or edited). OCT+ held + a step key still flips the accent at the press. Every page whose white keys are the steps (STEP, PATTERN, MOTION, SONG, TRACKS).
• RESON KEYF (KEYFOLLOW, RESON 2/2 KNOB 4, 0..100 %, 0 % = off, the default): the resonator's pitch follows the note of each hit from C4 (C4 = TUNE): a step's NOTE, a KEYS note, a ratchet's; at 100 % a step at C5 rings an octave above TUNE, at 50 % half an octave (MIDI notes play their track at C4: TUNE). Every model (STRNG, PIPE, CHORD, MODAL). A new note while the ring sounds glides the line there (a semitone a block at most, the line read per sample between lengths: no click). An amount rather than ON / OFF: partial tracking keeps a ring in a narrower range under a wide melody. KEYF 0 renders bit for bit as before. MIDI LEARN (R.KEYF) and MOTION take it. Projects stay "FDRE" at 3840 B (the sector is full): KEYF rides in each track's first step's spare byte, which every earlier firmware wrote as 0 and ignores, so older projects load with KEYF off and a project with KEYF loads on 0.23.2 without it.
• MUTE: NEXT BAR works while following a clock (CLK USB, TRS or BLE): the waiting mutes now flip on the bar line instead of never. The bar is found from the clock's real advance in the block (read after the block's Clock), not the block's length; a muted COMP source (GHOST KEEP / HIDE) starts its 5 ms fade on the bar's last Clock pulse, so the fade ends before the bar's first hit. CLK INT is unchanged.
• Knobs: a quick turn no longer skips clicks. The frozen input HAL (upstream Felucca 1.0) took a contact state only when two scan frames in a row saw it, so a knob snapping through its clicks lost them from ~40 clicks/s (a flick counted next to nothing). The knobs are now decoded by upstream Felucca 1.1.5's decoder (276f72a, issue #126: every frame counts, a jump carries on the way of the last click) in the drum firmware's own code (firmware/src/enc.c, run by the scan's hook once a frame; the frozen files are untouched): every click counted up to ~300 clicks/s, still one step a click, bounce and a still knob's chatter ignored (tests/enc_test.c).

0.23.2 - 2026-10-23

• REC: on TRACKS a REC tap arms / disarms the selected track, saying so (T3 REC ARMED / T3 REC OFF). On every other page a REC tap is REC ALL: every track armed (REC ALL, the REC LED and the SMC-Mixer's REC 1-8 lit), so each white track key plays and records its own track wherever the keys play tracks (HOME, SOUND, FX, TRACKS ...): finger-drum a whole kit live. KEYS, step record and knob motion stay the selected track's. A REC tap off TRACKS ends it and arms again the tracks armed before (T3 REC ARMED / REC OFF); on TRACKS it ends it with the selected track armed. Step record on STEP, REC held and STOP TO EDIT while a song plays are unchanged; a learned REC and the SMC-Mixer's REC act as the button on the page shown; the SMC-Mixer's REC n during REC ALL ends it and disarms track n (the others stay armed). Not saved in projects, as the arm state.
• REC no longer starts play: a REC tap (and REC ALL, a learned REC, the SMC-Mixer's REC and REC 1-8) only arms / disarms; PLAY starts the transport, and an armed track records once playing. Step record is unchanged.

0.23.1 - 2026-10-22

• Web site only (the firmware is the same as 0.23.0): the landing page and the installer count visits and installs anonymously with GoatCounter (deadactive.goatcounter.com; no cookies, no personal data); the hero shows "Installed N times" under the install button. The install is counted once, after the installer says Done, and never holds it up.

0.23.0 - 2026-10-22

The first published release since 0.16.0: it also brings everything in 0.17.0 .. 0.22.0 (CHANGELOG.md): the MD bank's 21 voices (13 TRX, 8 EFM), 151 factory presets and 128 user preset slots, the default TRX kit, the 4-slot LFO routing, accents on OCT+ and a step, the Machinedrum-style screen and its faster redraws. Projects saved by 0.23.0 don't load in older versions.

• SOUND pages: every engine as FM, ACID and BDTRX: the name on the left, its number "#NN/45" under it, VOICES, CHOKE and "+ LAYER" under that, a graph on the right. The engines with no graph of their own show their rendered hit: the voice's real sound (one hit at velocity 100, played silently in the background, never touching what you hear) as a waveform, its length labelled ("HIT / 300 MS", 100 .. 1000 ms, following the sound). It draws again when MODEL or a SOUND knob changes, over a few frames (the old picture stays until the new one is done); SAMPL shows its sample.
• Engines renamed (the names shown only: projects, presets and MIDI unchanged). MD bank: KTRX -> BDTRX, XTTRX -> TMTRX, XCTRX -> CGTRX, MATRX -> SHTRX, XTEFM -> TMEFM. MODERN bank: KBOOM -> BOOM, KPUNC -> PUNCH, SSNAP -> SNAP, SCRAK -> CRACK, HMETL -> METAL, HNOIS -> HISS, MEMB -> SKIN, SMPL -> SAMPL. User preset slots saved from them are named after the new names ("BOOM 07").
• The power-on kit (also TOOLS INIT ALL and a new project) is the TRX classic kit: KTRX, SDTRX, CPTRX, CHTRX, OHTRX, XTTRX, RSTRX, CYTRX, each on its default preset, with the same roles and MIDI notes as before (kick 36, snare 38, clap 39, closed hat 42, open hat 46, tom 45, rim 37, cymbal 49) and no choke. Saved projects load unchanged.
• HOME: the 4 boxes above PROJ show the bar of a 4-bar cycle: the current bar solid, moving with the playhead, back to the first at every PLAY (stopped: the first). They used to show the selected track's banks.
• The MODEL knob's list runs MD, MODERN, CLASSIC (KTRX .. CYEFM, KBOOM .. SMPL, K808 .. CLAVE), and the preset banks MACHINEDRUM, MODERN, CLASSIC, USER. Models keep their numbers and presets their uids, so older projects load with the same voices and presets.
• The SOUND pages show the engine's place in that list under its name, "#01/45" (KTRX) .. "#45/45" (CLAVE).
• LFO: the OCT- switch between LFO 1 and LFO 2 is gone. The LFO pages show both LFOs side by side (LFO 1 on KNOB 1-2, LFO 2 on KNOB 3-4): WAVE RATE, MORPH PHASE, TRIG MODE (the RATE MODE now has a knob; OCT+ still switches the one of the LFO turned last), and a last page, DEST: 4 slots per track, each a source (LFO 1 / LFO 2), a destination (any knob an LFO could target) and its own depth (KNOB 1 the slot, 2 SRC, 3 DEST, 4 DEPTH). Older projects load with their LFO 1 / LFO 2 routing as slots 1 / 2 (the sound, motion and MIDI LEARN unchanged); projects are saved in a new format (FDRE) that 0.22.0 cannot load.
• Accent: hold OCT+ and tap a step key (STEP, PATTERN, MOTION, SONG, TRACKS): the step accented (an off step turns on accented), or plain again. Holding a step key no longer sets the accent, so a held step is only PROB (KNOB 1) and RATCH (KNOB 2). OCT+ on its own changes the bank when it is let go; while it is held the keys show the bank's accents. The STEP hint reads [OCT+] +TAP ACCENT.
• The selected track on the keys: on HOME and every EDIT (SOUND, LAYER), FX and LFO page its white key (F3..F4) is lit, as the keys select tracks there (held keys lit too). KEYS, COMP, the step pages and GLOBAL / SAVE / GRIDS keep their own.
• OCT- / OCT+ breathe (upstream Felucca's breathing LED, #119): fading in and out, ~1.1 s, where pressing them would do something (the next / previous bank on the steps, LAYER from SOUND, the LFO pages' RATE MODE (OCT+), YES in a dialog, OK in the menu, NAME's RENAME, MIDI LEARN's DONE, the PRESETS list's LOAD and DELETE); a way back (NO, CANCEL, BACK) is lit.
• PERFORM keeps its knobs: while its screen is up (FX held, the PAGE, a layer key held) KNOB 1-4 are its macros only, also for detents that arrive while the firmware is between its two knob reads (they used to reach the page under it), and SELECT turns no page under it (a page button, HOME or an FX tap still close the PAGE).
• MENU BACKLIGHT has upstream Felucca's LED levels: OFF, DIM LO (the old ON: unlit keys and now the idle buttons at ~5 %, the step beats ~25 %), DIM HI (~10 %, beats ~30 %), INV (idle lit, active dark), INV LO / INV HI (idle at ~10 % / ~25 %). KNOB 1 steps, OCT+ steps and wraps. Saved in the settings record's palette word (bits 9..11); an older Hortator reads any level but OFF as ON, and an older record's ON loads as DIM LO.
• MENU > ABOUT credits everyone whose work is in the firmware, its research and its pages (Felucca, Mutable Instruments, DaisySP, the samples, the recovery tool, the web fonts and icons, the emulator the MD voices were measured from, with a disclaimer). The credits scroll under the logo with SELECT, a row a detent, with a scroll bar at the right; ABOUT opens at the top. LICENSING.md lists DaisySP (MIT, LICENSES/MIT-DaisySP.txt) and the research; README and the site's footer carry the same credits.

0.22.0 - 2026-10-21

• Faster screen: only what changed is sent to the display (the same look, pixel for pixel). A message popup (an SMC-Mixer knob's value, LOADED, ...) and the TEMPO popup no longer repaint the whole screen when they appear, change or end: only the popup and what lay under it. The breadcrumb sends only its text, the trig strip only the playhead's step, TRACKS only a row's level, meter mark or playhead cell, HOME's strip only the knob that moved (its LFO's dot alone). HOME's scope waits while a knob turns. A full repaint sends the screen once (it sent ~1.6 screens). E.g. an SMC knob click on TRACKS: ~6k pixels (~8 ms at the display's 12 MHz) instead of a full repaint (~99k, ~130 ms); TRACKS playing: ~0.3k pixels a frame instead of ~13-29k.
• A new screen look in the style of a classic digital drum machine's LCD, on every screen: two colours only (ink on a backlight; dither, dotted rules, inverted bars and title tabs instead of grey tones), a square pixel font drawn at 2x with no smoothing, round knob dials with their values under them, shadowed popups. Layout: an inverted top bar, a compact knob row, the graph area, a trig strip with gaps between steps, and a breadcrumb (T1>K909>SOUND). HOME: a main-screen strip under the top bar, four small knobs with values below and a large scope; TRACKS keeps everything it shows on dithered level boxes. MENU > COLOR now cycles four themes: MD RED (the default), RED ON BLACK, WHITE ON BLUE and BLACK ON GREEN (old colour settings map to the nearest). A new 1-bit logo on BOOT and ABOUT. The PRESETS popup and list, MENU, NAME, the Bluetooth page and every popup in the same style. Nothing that was on a screen before is lost.

0.21.0 - 2026-10-19

• Presets: a preset is a voice (MODEL and the 8 SOUND knobs), in banks MACHINEDRUM, CLASSIC, MODERN (151 factory presets, below) and USER (128 slots in flash). The PRESETS encoder loads the next / previous preset onto the selected track at each detent, through every bank (empty USER slots and a capped ACID skipped), with a popup over the graph (the bank, the preset, two before and after; ~1.5 s). EDIT held ~0.4 s opens the PRESETS list (an EDIT tap and step record's EDIT as before; seven presets on screen): KNOB 1 / PRESETS move, KNOB 2 / SELECT the bank, and every move plays the preset under the cursor once on the selected track, which keeps that sound while the list is open (its key and the pattern play it). OCT+ LOAD keeps it and closes the list; EDIT or HOME closes it with the track's own sound back (preset and * too). SAVE stores the track's own sound (not the auditioned one) into the first free USER slot or the chosen one (a used one: SAVE twice), OCT- twice DELETE. USER presets are named from the voice and the slot ("SDTRX 03"); saved while playing they are written to flash at the next STOP (as MIDI LEARN's map; its own flash object). The SOUND pages show the track's preset ("PRESET HOUSEBD") with * once a SOUND knob moved (one already at its end turned further: no *), TRACKS' footer too; a track whose USER slot now holds another voice (or none) shows -. Projects keep each track's preset and mark ("FDRD": a factory preset by its own fixed number, never its place in the banks, so later banks can grow; a USER one by its slot; older projects load with no preset, their sound unchanged). SAVE while MOTION plays stores the knobs as set, not motion's values. While MIDI LEARN is on, EDIT held does nothing (the list would end LEARN).
• The factory banks: MACHINEDRUM 55 presets read from the Machinedrum's factory kits (1 to 4 per voice; none for MATRX, CLTRX), CLASSIC 56 and MODERN 40 (4 per voice, ACID and SMPL included). Every voice's default sound is its first preset: unchanged for CLASSIC and MODERN, new for the 19 Machinedrum voices with presets (KTRX SUBTHUMP, SDTRX HARDSNAP, CPEFM BUZZCLAP, ...; the list in docs/DEVICE_INSTALL.md). Generated from tools/presets.json by tools/gen_presets.py.
• No voice has a default choke group any more: HATC, HATO, HMETL, HNOIS, CHTRX, OHTRX and HHEFM used to start in group 1. CHOKE is now only the track's own setting: a MODEL change or a preset load never changes it, so the power-on kit's HATC / HATO no longer cut each other until CHOKE is set on both. Older projects keep their stored CHOKE.

0.20.0 - 2026-10-19

• BDEFM, XTEFM: an FM bass drum and an FM tom measured from a classic digital drum machine's (an emulator's renders, knob by knob; only the measured laws, no code or data of it). One voice, two measured sets: two sine operators in true FM (the carrier's frequency is modulated), one pitch envelope on both (RAMP: the start pitch x RAMP / 16, back to the pitch over RDEC; RAMP 16 flat, below it the pitch rises, from 0 Hz at RAMP 0), the deviation MOD / 16 of the carrier falling over MDEC, the modulator at MFRQ / 16 of the carrier, then the machine's 21 Hz high-pass. BDEFM TUNE DECAY RAMP RDEC, MOD MFRQ MDEC MFB (MFB the modulator's feedback: grit from ~40, noise at 127). XTEFM TUNE DECAY RAMP RDEC, MOD MFRQ MDEC CLIC: the tom's pitch, its 121 Hz high-pass, CLIC the start phase (a click at 127). XTEFM's FM is an approximation (the machine's own FM is not understood; a chaotic modulator gives its kind of grit, not its exact tone); with MOD 0 XTEFM is exact. TUNE 0 is the machine's PTCH 64 (102.6 Hz, 86.1 Hz); the defaults are the measured neutral sounds (RAMP 0: the pitch rises from 0 Hz). DECAY 107..127 is its end (0.58 s, 4 s to -60 dB, as every voice; the machine's goes on to ~1.6 s). Levels as K909, TOM. 1 voice each. After B2TRX in the MODEL list.
• SDEFM, CPEFM, RSEFM: a snare, a clap and a rim shot measured from a classic digital drum machine's FM family (an emulator's renders, knob by knob; only the measured laws, no code or data of it). Each is a sine whose frequency is modulated by noise; that FM noise is the same on every hit, as the machine's (SDEFM's NOIS layer is random per hit). SDEFM TUNE DECAY NOIS NDEC, MOD MFRQ MDEC HPF: a 290 Hz carrier, MOD the noise FM's depth (plus a weak sine at MFRQ), MDEC its decay; NOIS / NDEC a separate noise burst; HPF a one-pole high-pass. CPEFM TUNE DECAY CLPS CDEC, MOD MFRQ MDEC HPF: the same FM on an 820 Hz carrier restarted CLPS / 8 times (none below 8) at CDEC's measured period (1 .. 41 ms), then DECAY. RSEFM TUNE DECAY MOD HPF, SNAR SPTC SDEC SMOD: a 976 Hz rim and a second "snare" voice (SNAR its level, 0 = off; SPTC its pitch), each noise-modulated (MOD, SMOD); HPF at the measured corners. Every DECAY follows the machine's law to its 1.6 s end; past 5.5 s every voice fades out (the 6 s lifetime). TUNE 0 is the machine's PTCH 64; TUNE and a step's note move every pitch by semitones (RSEFM's second voice too: the machine's PTCH moves only the rim). 1 voice each. After B2TRX in the MODEL list.
• CBEFM, HHEFM, CYEFM: an FM cowbell, hat and cymbal measured from a classic digital drum machine's FM voices (an emulator's renders, knob by knob; only the measured laws, no code or data of it). CBEFM TUNE DECAY SNAP FB, MOD MFRQ MDEC: two tones 1.4805 apart, each a true-FM pair (the deviation MOD / 32.65 falling over MDEC, the modulator at MFRQ / 16 of its tone), phase feedback on the carriers (FB), SNAP a fast extra decay (4.5 ms) that lowers the rest of the hit; fixed start phases, as the machine's. HHEFM TUNE DECAY TREM TFRQ, MOD MFRQ MDEC FB: one true-FM pair whose carrier jumps to a random phase every 32 samples, then a near-differentiator (the hat's sizzle), FB fed into the carrier's phase accumulator (it stalls the tone, then turns chaotic), a tremolo restarting at each hit; choke group 1 (as HATC). CYEFM TUNE DECAY FB HPF, MOD MFRQ MDEC: four PM pairs at 1 / 1.41 / 1.80 / 2.70 x the base, the index (MOD + 7) / 13.5 falling over MDEC (0.28 .. 11 s), phase feedback on the carriers, HPF two one-pole high-passes (431 .. 3216 Hz, off at 0), the sidebands past Nyquist aliased as the machine's are; 2 voices. TUNE 0 is each machine's PTCH 64 (409.7, 577, 580 Hz); DECAY the family's law (tau 64.6 ms x 2 ^ ((DECAY - 64) / 13.5); 127 fades out from 5.5 s). Levels with COWB, HATC, CYMB. After B2TRX in the MODEL list.
• The EFM voices' DECAY: BDEFM and XTEFM end at 0.58 s (Hortator's longest decay, as KTRX: a faded sub-bass tail sounds worse than a short one); SDEFM CPEFM RSEFM CBEFM HHEFM CYEFM follow the machine's whole 1.6 s law and fade out from 5.5 s at DECAY's top (the voices' 6 s life).

0.19.0 - 2026-10-18

• KTRX: a sine kick measured from a classic digital drum machine's (an emulator's renders, knob by knob; only the measured laws, no code or data of it). TUNE DECAY SWEEP SDEC, PUNCH NOISE SUB CLIP: the pitch with its built-in drop, SWEEP's cubic rise over SDEC, a short transient at the hit; PUNCH a square first cycle; NOISE a burst; SUB half-harmonics (alternate cycles long and short, fading on their own); CLIP a hard clip at a falling threshold. DECAY and SDEC follow the measured laws, floors and ends included: DECAY 0..27 is its 7 ms floor and 109..127 its end (4 s to -60 dB, as every voice); SDEC 0..14 its 5 ms floor, 107..127 the same end. 1 voice; the SOUND graph shows the pitch and the level over 300 ms. After ACID in the MODEL list.
• SDTRX: a snare measured from the same machine's (only the measured laws). TUNE DECAY SNAP TONE, BUMP BENV CLIP: two sines frozen for the machine's first 32-sample block, A at 342 Hz with BUMP's alpha-shaped pitch blip (its time BENV's), B a block-rate comb whose F1 / F2 BENV sets from the measured table (erratic, as the machine's); TONE crossfades them; CLIP a peak-preserving tanh whose drive falls on its own (~28 ms), whatever DECAY is; SNAP the same noise on every hit (1.6..5 kHz, tau 20 ms; above 64 a 1.44 kHz ring). TUNE moves both sines by semitones (the machine's own PTCH, +-0.8 %, and TUNE, a few Hz on B, are left out). 1 voice.
• B2TRX: the same machine's second bass drum (only the measured laws). TUNE DECAY RAMP HOLD, TICK NOISE DIRT DIST: a 50 Hz sine (TUNE 0; it starts at 0 on every hit, the machine's runs free), RAMP's added pitch in Hz (the same on every note), HOLD at full level before DECAY's fall (up to seconds; shortened when a long DECAY would outlast the voice's 6 s), TICK a click into the output's saturation, NOISE a hiss, DIRT a 3..257-level quantiser and DIST a hard clip before the envelope; the output's high-pass and smoothing as measured. 1 voice.
• XTTRX, XCTRX, CLTRX, RSTRX: a tom, a conga, claves and a rim shot measured from the same machine's (only the measured laws, no code or data of it); 1 voice each. XTTRX / XCTRX (one voice, two measured sets) TUNE DECAY RAMP RDEC, DAMP DIST DTYP: a fixed click, then a sine whose RAMP adds Hz falling over RDEC; DAMP moves level from the body to the click; DIST a hard clip after the decay, DTYP making the clipped part sag; the tail cut to zero as measured (XTTRX's DECAY 114..127 is its 0.85 s end: the voice ends by 5.4 s). CLTRX TUNE DECAY DUAL ENH, TUNE2 CLICK: two pure sines (TUNE2 the second's pitch, TUNE moving both) at their measured levels; DUAL delays the first; ENH raises it; CLICK a short click. RSTRX TUNE DECAY DIST: a sine and a fixed 18 ms click under one decay; DIST warps the sine's half-cycles (stronger at low pitch). TUNE 0 is each machine's PTCH 64 (145, 173, 2045, 258 Hz); the other knobs are the machine's own.
• CPTRX and MATRX: a clap and maracas measured from the same machine (averaged renders: the voices are noise). Their own noise per hit (a hit renders the same every time). CPTRX: TUNE DECAY CLPY HARD, RATE ROOM RSIZ RTUN: noise through a 4-pole high-pass (TUNE: the machine's TONE in semitones) and a resonant low-pass (HARD), four bursts on one noise (RATE their spacing, DECAY their decay, CLPY the first three's level), a soft clip the clap never passes, and ROOM a resonant noise tail after the clip (RSIZ its length, RTUN its colour; 0: off). MATRX: TUNE DECAY ATT REV, DAMP RATL TONE HARD: noise in 32-sample grains (DAMP: more of them silent) through a 4-pole high-pass (TONE, HARD; TUNE moves it by semitones), a rattle that grows through the hit (RATL), a hold (DECAY: 14 ms + 1.45 ms a step) after an attack (ATT), REV's dip and second hold, then a cut. 1 voice each.
• CBTRX, CHTRX, OHTRX, CYTRX: a cowbell, closed and open hats and a cymbal measured from a classic digital drum machine's (an emulator's renders, knob by knob; only the measured laws, no code or data of it). The hats and the cymbal share one metal bank: seven oscillators with whole-sample periods (other phases at every hit). CHTRX / OHTRX: TUNE DECAY GAP HPF LPF MTAL (MTAL from noise to metal; DECAY a linear hold, GAP the decay after it; OHTRX's long hold dips to silence and comes back, as the machine's); choke group 1, as HATC / HATO. CYTRX: TUNE DECAY RICH TOP TTUN SIZE PEAK (RICH the oscillators' balance, PEAK a 5.2 kHz bell, SIZE the body's corners, TOP / TTUN a brighter top that fades first; 2 voices). CBTRX: TUNE DECAY ENH DAMP TONE BUMP PTCH (two tones, ENH's resonator and grit, DAMP a narrow band-pass steady from the first sample, a hold floor). Levels as HATC, HATO, CYMB, COWB. After KTRX in the MODEL list.
• The new voices' place in the MODEL list, after ACID: KTRX SDTRX XTTRX XCTRX CPTRX RSTRX CBTRX CHTRX OHTRX CYTRX MATRX CLTRX B2TRX.

0.18.0 - 2026-10-14

• MIDI LEARN: up to 16 CCs from any controller, each set to one knob of one track. Hold GLO (the MUTE screen) and press G4 to turn it on; turn a knob of the selected track (HOME, EDIT, LAYER, FILTER, FX, SLICER, RESON, LFO, PATTERN, TRACKS' LEVEL / LEN / PAN), then move the controller's knob: CC74 -> T3 DECAY. The footer shows what is picked and its CC. The CC moves that track's knob whichever track is selected, from USB, TRS or Bluetooth in MIDI mode (not SMC DAW mode), on any channel, over the knob's whole range (centred knobs 0 at 64, lists by step); an LFO on the knob keeps modulating around it. One CC per knob, one knob per CC; CC 0, 32 and 120..127 are never learned. While on, OCT- clears the picked knob's CC (nothing picked: CLEAR ALL LEARNED?), OCT+ ends it. Saved in the FM-1's flash (its own record, not in projects), after each change once stopped; off at power-on.
• MIDI LEARN: actions and 32 controls. While LEARN is on, PLAY, REC, ALGORITHM right / left (NEXT / PREV TRACK), FX + a black key (a PERFORM effect) and FX + a white key F3..F4 (that track's PERFORM mute) pick their action instead of doing their job; a PERFORM knob (FILTER CRUSH THROW DEPTH) picks its macro. A CC or a note is bound to an action (NOTE36 -> PLAY, CC22 -> FX R1/16), a CC to a macro (CC20 -> FX FILTER, 0 at 64). A press (a CC rising to 64 or more, a note on) taps PLAY / REC or steps the track; a PERFORM effect or mute is held while the controller's button is (as its key, FX not held) and ends on release or when the menu, a confirm, NAME or the MUTE screen comes up. A learned note plays no drum. 32 bindings (was 16); the saved 16 load as they were.

0.17.0 - 2026-10-13

• SELECT turns the pages: SELECT does what PRESETS did (a section's pages, HOME 1/3 to COMP 2/3 and 3/3, the page under PERFORM, the menu's cursor, the Bluetooth page's rows), except on HOME's TRACKS mode, where it sets the tempo. PRESETS does nothing; ALGORITHM still picks the track.
• HOME has two modes: TRACKS (the mixer: TRACK LEVEL LEN PAN, the steps on the keys) and HOME (the scope, the selected track's knobs, the compressor after it). A HOME tap on HOME switches between them, from elsewhere it opens the one last shown; power-on shows TRACKS. REC no longer opens TRACKS.
• REC arms on every screen: a REC tap arms / disarms the selected track (arming while stopped starts play; STOP TO EDIT during a song). Kept: step record on STEP with KEYS on and stopped, and REC held for CLEAR TRACK on SEQ, DELETE ROW / CLEAR SONG on SONG. REC is no longer the mute modifier.
• The MUTE screen (GLO held): the eight tracks as boxes, filled = heard, outline = muted, a waiting mute blinking, the key under each; the white keys F3..F4 toggle them, the top C# / D# set MUTE: NOW / NEXT BAR. A GLO tap still opens GLOBAL. Replaces REC held + a key.
• The last project loads at power-on: every SAVE to flash remembers its slot; at power-on (not in safe start) it loads, stopped. If it can't, LOAD FAILED: SLOT n / START NEW PROJECT?: YES forgets the slot, NO asks again at the next power-on; both carry on with the power-on kit.
• PERFORM knob effects stay on: FILTER, CRUSH, THROW and DEPTH keep working after FX is let go or the PERFORM page closes, on every page, until turned back to 0 on the PERFORM screen (or TOOLS INIT*). An amber FX in the top bar shows while any is on. The black keys' effects still stop when let go.
• Metronome: GLOBAL 3/3 METRO OFF / LOW / MID / HIGH (a device setting, not in projects). While playing, a click on every quarter note, higher on the bar's first, after the PERFORM effects and at the MASTER volume, on the speaker, the headphones and USB audio.
• CPU: voices are shed at 95 % of an audio block (was 85 %). PRIO per track (EDIT, after CHOKE): HIGH / LOW, a LOW track's voices go first at a shed and at the voice cap (a held ACID note still last). A red CPU icon shows in the top bar for 2 s after a shed.
• Project format FDRC (for PRIO): older projects load as before, every track PRIO HIGH; projects saved by this build can't be read by 0.16.0. Project data only in RAM (a slot whose flash save failed) is not carried over.
• Key backlight: MENU BACKLIGHT OFF / ON (a device setting, default OFF). ON: every unlit key glows at about 5 %, the unlit steps 1, 5, 9 and 13 of the bank shown at about 25 %, marking the beats on every screen where the keys are the selected track's steps (STEP, PATTERN, MOTION, SONG; HOME's TRACKS mode while no track is armed); lit keys stay full, the buttons unchanged. The LEDs are dimmed by the 10 kHz key scan: PWM over 20 scan frames (22 ms), 25 % lit every 4th frame (~230 Hz), 5 % in 1 frame of 20 (~45 Hz).
• Device settings: the last project, METRO and BACKLIGHT are kept in spare bits. Going back to an older Hortator with any of them set: its SPEAKER EQ reads FLAT.
• Bluetooth version: the Bluetooth page gains AUTOSTART OFF / ON (after BLUETOOTH; KNOB 1 right ON / left OFF, OCT+ toggles; saved when the menu closes; default OFF). ON: 5 s after power-on, Bluetooth starts by itself as if BLUETOOTH ON were chosen, and reconnects to the remembered device. Not in a safe start (SEQ held). If the last Bluetooth start before this power-on did not complete or ended in a fatal error, it is skipped and the top bar says BT AUTOSTART SKIPPED; BLUETOOTH ON by hand still works. Kept in the palette word's bit 8 of the settings, by both versions: going back to an older Hortator with AUTOSTART ON resets its display settings (COLOR, SPEAKER EQ, ZOOM, KNOB ACCEL, USB LEVEL, PERFORM) to their defaults once (its COLOR check).
• Frozen baseline moved to frozen-base-8 (user decision 2026-10-12): the frozen main.c gains one line, the key backlight's hook in the TIMER5 scan ISR right after fm1_input_tick() (led_dim_tick(), firmware/src/led_dim.c), the only way to dim LEDs while the audio ISR renders. frozen-base-8 = frozen-base-7 + that line + the file it calls; gate 2a accepts main.c differing from drum-v0.16.0 by exactly that line (nothing else).

0.16.0 - 2026-10-11

• ACID: every step holds a note, SLIDE and TIE (format FDRB; older projects load and play as before, but projects saved by this build can't be read by 0.15.0); drum tracks play their steps transposed; ACID, a 303-style bass voice (TUNE DECAY CUTOF RESO ENVMD ACCNT WAVE GATE), plays them with accent, slide and tie on up to two tracks ("ACID: 2 TRACKS MAX"). KEYS (an SCL tap): the keys play the selected track chromatically, OCT- / OCT+ the octave (-2 to +2; LAYER from EDIT and the LFO pages' OCT buttons need KEYS off, the STEP bank stays on KNOB 1, TRACKS keeps OCT as its bank); KEYS notes send no MIDI out; an ACID note (or a tied chain) over 5.5 s is cut. Live record (a REC tap on TRACKS arms the track, and starts the transport when stopped): a key writes the nearest step, a held key TIEs the later steps, a legato overlap SLIDEs (TIE / SLIDE on ACID tracks only). Step record: KEYS on, STEP page, stopped, a REC tap (KNOB 1..4 STEP NOTE TIME FLAG, EDIT a rest; REC, PLAY or leaving the page ends it). A loaded project keeps ACID on its first two ACID tracks, the others return as their power-on kit drum. A step the white keys turn on takes the last KEYS note on an ACID track, C4 on a drum (the last note resets on LOAD and on clearing the pattern). An ACID track's STEP page is a piano roll, the note shows in the footer; ACID's SOUND page shows its filter and the note's shape.
• A new start screen, CRT COLLAPSE: the HortatoR logo squashed through five dithered frames into one white scan line that bursts sideways, in the chosen COLOR (assets/boot.png, made by tools/boot_variants.py --ship; the study's other screens: tools/boot_variants.py OUTDIR). The logo, there and on ABOUT, is now UnifrakturMaguntia (SIL OFL).
• Releases can carry two versions: the plain firmware and the same build with Bluetooth MIDI. The web installer offers a choice (the plain one by default), the release a second file hortator-X.Y.Z-bluetooth.fwsc (BLE=1 tools/publish.sh; first used for the Bluetooth version with parts 2, 3 and 5).
• Bluetooth MIDI (the Bluetooth version only): MENU (HOME held) > BLUETOOTH turns Bluetooth on (off at every power-on), scans, lists the devices found (BLE-MIDI ones first) and connects to the one picked. It remembers it (saved) and reconnects whenever it is in range, also after a power-on once BLUETOOTH is ON; KNOB 1 left on DEVICE forgets it. MODE (saved): AUTO (SMC DAW for a device named SMC…, else MIDI), SMC DAW, MIDI. BT CONNECTED / BT LOST in the top bar. The console's ble stays for testing.
• The M-VAVE SMC-Mixer in its DAW mode: faders 1–8 = the track levels (pickup: a fader acts once it reaches the level; the mixer blinks it until then), knobs 1–4 = the selected track's first four knobs, MUTE / SOLO / REC / SELECT per track, PLAY / STOP / REC, BANK / CHANNEL ◀ ▶ the track; its LEDs show the mutes, solos, armed tracks, the selected track and the transport. Fader and knob moves record as motion on the selected track while armed.
• MIDI mode: the device's notes on the drum channel play the tracks, as USB and TRS; GLO CLK BLE follows its clock (a project saved with CLK BLE loads with CLK INT in the plain version).
• SOLO (from the SMC-Mixer): while any track is soloed only the soloed ones are heard; not saved, cleared by INIT, and cleared (nothing cut) when the SMC-Mixer disconnects or MODE leaves SMC DAW, as the FM-1 has no unsolo. Leaving SMC DAW while connected turns the mixer's LEDs off.
• MODE and the remembered device are kept in spare bits of the device settings, in both versions. Going back to an older Hortator after picking a device: its SPEAKER EQ reads FLAT.

0.15.0 - 2026-10-09

• Bluetooth MIDI, part 1 (a separate build, FELUCCA_BLE=1; the normal firmware does not contain it, gate 5): the JieLi BLE stack fits the app slot (424 KB, 157 KB free), runs in the main loop in 5 ms slices, and is driven from the USB console: ble start / scan / list / connect N / stop, ble for its status. Off at every power-on. Tested on the FM-1 with the M-VAVE SMC-Mixer: connected and receiving, no audio glitches, an update and UBOOT with Bluetooth on. Received MIDI is counted, not played yet (part 2). Docs: docs/ble/FIT.md, docs/ble/DEVICE_STEPS.md.
• Build: every build stops unless the update loader is the pinned one (tools/frozen_base.txt); a Bluetooth build also stops on its update-path and no-BT-at-boot gates.

0.14.0 - 2026-10-08

• FM: a 2-operator FM percussion model (TUNE DECAY INDEX RATIO, MDEC SWEEP FBK VEL): bells, metallic toms, woodblocks, zaps, FM kicks; 2 voices; the SOUND graph shows the ratio's sidebands.
• SEQ: the white keys are the selected track's steps on every SEQ page (STEP, PATTERN, MOTION, SONG) and on TRACKS (tap on / off, hold accent, OCT+ / OCT- the bank); ALGO or TRACKS' KNOB 1 picks the track. TRACKS mutes: REC held + a key (+ top C# / D#: now / next bar), was OCT- held.
• PERFORM: the knobs are the macros whenever the PERFORM screen shows (a held layer key no longer let them edit the page under it).
• FILTER: a filter on every track (FX > FILTER: TYPE OFF LP BP HP NOT, CUT, RESO, ENV, DECAY), after RESON, before DIST; each hit sweeps it by ENV (accents further); LFO DEST F.CUT / F.RES. Projects: format FDRA (older ones load with the filter OFF). BENCH: filter, compressor and sidechain cases.
• COWB: TUNE now moves its pitch (its own 540 / 800 Hz oscillators, the band-pass follows); before, it only moved the filter over fixed partials. At TUNE 0 it sounds as before.

0.13.1 - 2026-10-08

• Recovery from a Mac with no extra hardware: when the FM-1 stops answering both the web installer and M-UPGRADE, tools/rescue/fm1_uboot.py backs up its flash and puts M-VAVE's stock V15 back through the chip's boot mode ([docs/RECOVERY.md](docs/RECOVERY.md)). The installer page and the README link to the guide. No firmware change.

0.13.0 - 2026-10-08

• PHYS (upstream Felucca 1.0's physical models, MIT DaisySP): MEMB, a struck drum head as a drum model (TUNE DECAY TONE HEAD on HOME; POS, BEND, STICK; toms, timpani, tabla), and MODAL, a bell / bar / plate body as a RESON model (STRCT from harmonic to bell, DECAY its ring time as STRNG's; 2 tracks at most). The RESON MODEL knob now skips a model that is full. No project format change.
• BENCH: the console's bench yes plays the performance cases on the FM-1; tools/fm1_bench.py compares them with the host's (render time, CPU %, per case: every model, RESON model, the heavy kits and their FX).
• The start screen and ABOUT show the HortatoR logo (UnifrakturCook Bold, SIL OFL); the "untested" labels are gone.

0.12.0 - 2026-10-07

• SONG + NAME (upstream Felucca 1.0's song chain and naming): SEQ > SONG plays up to 16 rows of {project A..D, repeat x1..x16} with the sounds loaded now (each row: that project's steps, LEN / DIV / SWING / SRC and motion; a row lasts its longest track; LOOP ON / OFF; STOP brings the current pattern back). Projects get names (the PROJECT page's NAME knob opens the NAME screen: keys type phone-style, KNOB 1 / 2 cursor and character; SAVE saves as before); slots shown as A..D. Saved with the project (format FDR9; older projects load with no song and no name).

0.11.0 - 2026-10-07

• MOTION (upstream Felucca 1.0's motion recording): with a track armed (REC on TRACKS) and playing, its sound knobs turned are recorded per step and played back with the pattern (a value holds until the knob's next event; the patch comes back at the loop start and on STOP; the LFOs keep modulating on top). SEQ > MOTION: PLAY ON / OFF, the event count, CLEAR. 128 events for the 8 tracks, saved with the project (format FDR8; older projects load without motion).

0.10.0 - 2026-10-07

• PERFORM (upstream Felucca 1.0's FX hold layer): hold FX, then the black keys play master effects while held (REPEAT 1/8 1/16 1/32, REVERSE, TAPE STOP, LPF, HPF, FREEZE, OCT UP, OCT DN), the white track keys mute their track while held, KNOB 1..4 are FILTER / CRUSH / THROW / DEPTH (SHIMMER with OCT); a tap on FX still opens the FX pages (now on the release). MENU > PERFORM PAGE: holding FX opens a PERFORM screen that stays (keys and knobs work without FX) until another screen is chosen. REPEAT / REVERSE start on the 1/16 (the MIDI clock's when following); the buffer is the slicer's (743 ms). Nothing changes when the layer is idle.

0.9.0 - 2026-10-07

• MIDI clock in (upstream Felucca 1.0, adapted from contributions by ChanceTheMaker and keremimo): GLOBAL CLK INT / USB / TRS; the steps (every division), Grids, the slicer, synced LFOs and the delay follow the source's tempo, its Start / Continue / Stop drive the transport (step 0 on the first pulse; stops if the clock stops for 0.5 s).
• Exact step timing: each track carries its step-length remainder, so divisions never drift against each other (e.g. a 1/16 and a 1/4 track at 120 BPM) or against an external clock.

0.8.0 - 2026-10-07

• USB audio input (upstream Felucca 1.0, UAC1): the FM-1 records into a DAW over its USB cable (16-bit stereo, 44.1 kHz; the headphone signal, SPEAKER EQ included). MENU USB LEVEL: MASTER (the recording follows the volume knob) or FIXED (always full level; the knob sets only the speaker / headphones, upstream 1.0.2 #42). Frozen baseline frozen-base-6.

0.7.0 - 2026-10-07

• Sound pack (upstream Felucca 1.0.2): MENU SPEAKER EQ FLAT / LOWCUT / BASS+ (the bass heard through its harmonics on the small speaker); SPRING reverb (shown SPRNG) beside ROOM on the new REVERB page (TYPE SIZE DAMP; chorus on its own CHORUS page); slow divisions 1/2, 1/1, 2BAR, 4BAR on PATTERN DIV and delay TIME, division knobs ordered by length. Projects are FDR7 (older ones load with ROOM).

0.6.0 - 2026-10-07

• TRS MIDI input on by default: notes from the jack play like USB's; clock bytes are queued for the coming MIDI clock feature (upstream Felucca 1.0, stage 2 step 4, frozen baseline frozen-base-5).

0.5.0 - 2026-10-06

The first numbered version: everything on main so far.

• Drum machine on Felucca: 8 tracks, drum models (808 / 909 kicks and snares, samples, FM and more), step sequencer with per-track length, swing, live recording, quick mutes, MUTE NEXT BAR.
• M2: step PROB / RATCH, Grids (Mutable Instruments) pattern generator as a track source.
• M3: Streams compressor with sidechain ducking keyed by a track, COMP GHOST (MUTE / KEEP / HIDE).
• Two LFOs per track (10 waves with morph, SYNC / Hz / TIME rates, one destination each).
• RESON: per-track resonator insert (STRNG / PIPE / CHORD).
• PRESET knob turns the current section's pages; the regrouped EDIT / COMP / FX pages.
• From upstream Felucca 1.0-1.0.2: safe fixes (calm knob acceleration, swing cap, STOP TO SAVE, installer resume); key debounce and encoder fix (#23); TIMER5 nesting; USB-MIDI driver; storage hardening (sequence wrap, slot check, no truncated loads, full header read-back) and the erase order that keeps a save silent.
• Project format FDR6; older projects are converted on load.

CHANGELOG.md on GitHub ↗