Melodee

On pages with four values, KNOB 1-4 change them in the order shown.

FX opens the selected track's rack. KNOB 2 chooses one of three inserts or the shared row; KNOB 1 chooses the row's effect and KNOB 4 sets its mix. OCT+ opens an active slot, or the effect list for an empty slot; on the shared row it opens SHARED. A slot at OFF has no separate page. Press FX to return to the track rack.

On an active FX 1-3 or SEND FX 1-3 page, KNOB 1 is MIX, KNOB 2 rate/time/size, KNOB 3 character/depth, and KNOB 4 TONE for ECHO, ROOM and REVERB. TONE moves from DARK (less high end), through FULL, to THIN (less low end). OCT- returns to its rack.

SHARED has three slots and RETURN. KNOB 2 picks a row, KNOB 1 its effect, KNOB 3 ROUTE (CHAIN or SPLIT), KNOB 4 its amount. In CHAIN the slot rows set their mixes and the track rack's shared row sets this track's SEND. In SPLIT each SHARED slot row sets this track's send to that slot. The RETURN row sets the shared return in either routing. OCT- from SHARED returns to the track rack. There is no FX hold layer.

Hold OCT+ for about 0.7 s on SHARED or a SEND FX slot to open the Shared FX sheet; tapping OCT+ on RETURN opens it too. KNOB 2 picks Routing or Clear shared FX. On Routing, KNOB 1 chooses CHAIN/SPLIT and OCT+ switches between them. Clear shared FX asks first, then resets all three shared slots to defaults: their effects are OFF and TONE is FULL. Routing, return level and the tracks’ sends keep their values. If every shared slot is already OFF, the screen reports NOTHING TO CLEAR instead of asking.

SYSTEM > ROUT selects the four-channel range 1-4, 5-8, 9-12 or 13-16. Only channels in that range play, and missing tracks are silent; SEL receives all channels on the selected track. The chosen DRUM channel redirects to the first drum track only inside the range. USB and TRS follow the same rules.

USB audio is one duplex device named Melodee. Host volume and mute affect computer playback, while synth recordings keep their levels. USB INPUT still chooses stereo master or four mono tracks; USB AUDIO enables either direction. Changing the layout reconnects USB.

KNOB 2 or PRESETS picks a row, KNOB 1 changes it, OCT+ steps or opens it, OCT- closes. Rows: COLOR, FONT (RUBIK or PIXEL), HOLD, LIGHTS, USB AUDIO, USB INPUT (stereo or four track stems), AUDIO CLICK, CLICK LEVEL, COUNT-IN, NOTE PREVIEW, CHORD ENTRY, AUTOSAVE, PICKER POPUPS, KNOB ACCEL, HOME SELECT, GLO SELECT, SCREEN OFF, CALIBRATION, ABOUT, SOUND DESIGNER, BACK. PICKER POPUPS OFF keeps named-value edits inline; explicit lists and action sheets still open. There is no OVERCLOCK setting; the firmware leaves the clock alone. COLOR has eight palettes: NIGHT, DAY, CONTRAST, SUNSET, OCEAN, NEON, CANDY and LO-FI.

The sound designer (from Settings or the sound sheet) starts with KNOB 1 engine, KNOB 2 start point, KNOB 3 page set, then OCT+ / OCT- or PRESETS move between stages, SELECT turns pages, SAVE compares with the original, HOME finishes.

Buttons: the button whose pages you are on is lit, idle buttons glow faintly, a layer's button blinks while its map shows. PLAY is lit while playing and breathes during count-in; REC lights when any track records, even with another track selected; it breathes when tracks are armed but none is recording. OCT- / OCT+ show the octave shift on both HOME views. On other pages or with an overlay open, OCT- is lit for Back and OCT+ lights or blinks when it can enter or confirm. Keys: lit while sounding (MIDI too), faint for playable keys (the scale with QNT OFF), patterns and track selection while SEQ is held (armed track keys breathe), the grid on DRUM tracks. Settings > LIGHTS sets the level. PLAY's green LED is not used. Stage's armed track rows have a red border: breathing while waiting, flashing on beats while recording.

• No question: quick-save (hold SAVE or SAVE + REC); autosave; PROJECT > Load; saving the template over a readable template; startup repair of foreign settings and unreadable preset banks. SEQ's 1-second pattern question is itself the confirmation: choosing a different key there copies without a second question.
• Immediate sheet edits: Delete note, Clear hit and Clear lane run as soon as you choose them; there is no confirmation screen. Init sound on the PROPHET or FM6 Store sheet also resets the current sound immediately. Hold EDIT can undo the PROPHET reset; the FM6 reset takes no undo snapshot. With autosave on, the reset can be written to the current project slot after 5 seconds stopped and idle.
• Asks first: saving over a used project or sound slot, erasing a slot, clearing a pattern, track, song or all motion, deleting a pattern or song row, PATTERNS > Copy to over a used pattern, Init sound from Stage or a sound sheet, removing a track, New song with unsaved changes, taking a jam over an existing song, and explicitly replacing protected settings/templates. Clearing one motion lane or point is immediate and undoable.

• Back up first. Export the music and sounds you need before upgrading. The web editor's Complete backup holds the current music, settings/template and projects A-D, plus all 384 shared sound slots. It uses 29 archive objects. The filename begins Melodee-backup; its internal format label still says felucca-backup. Restore it through Melodee's editor. Undo history and another firmware's data are outside this archive. The release recovery tool makes a full flash backup before erasing; keep that file too.
• Restoring an older backup. Restoring an older 28-object archive first clears the current U379-U384 bank, before any archived objects are written, although that archive contains no copy of those six slots. Legacy Prophet conversion can later fill them with spill sounds; it does not keep their current contents. Back up the current library before restoring an older archive.
• Startup writes changed. Compatible older Melodee presets migrate into the shared library; unreadable preset banks can reset without asking. Foreign settings can also be replaced automatically. Migration or cleanup progress appears before those writes. After a preset migration error, OCT+ continues with presets protected; OCT- offers a separate confirmation to wipe all user sounds. An interrupted confirmed wipe resumes next boot. Projects keep OLD FORMAT protection.
• Back up in the firmware you are leaving first, with its own tool (above). Anything below marked at risk can be written over; whether an older saved copy survives depends on how often you saved, so do not count on it.
• What installing Melodee does to the firmware you had before.
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  install (loader): App range remains 0x4000-0x92FFF. For packages containing CRSTUB/valid CRBM commit metadata: before any changed body sector, erase marker sector 0x91000; update differing stub/directory sector 0x4000 first, remaining body sectors next, marker sector last. Marker at 0x91FE0 holds CRBM magic, format 1, body length, body CRC and marker CRC. Unmarked legacy packages retain ascending write order; damaged marked packages are rejected before erase. No flash-head or musical-data relocation (For a marked CRSTUB/CRBM package, invalidate marker before differing body writes and commit marker last; legacy unmarked packages use ascending order; damaged marked package refused before erase). install (loader): After the host confirms success the loader clears the RAM update record and scans every sector from 0xFB000 down to 0x93000: a sector whose last 256 bytes start with a valid update record (bytes 6-7 = 0x5441 and a matching CRC-16) is ERASED whole. This removes Melodee's own staging record sector 0xE4000 and any other firmware's update record in that range (the stock firmware's is reported at 0xE8F00 by the Felucca map, not checked here) (Only sectors in 0x93000-0xFBFFF whose last 256 bytes hold a valid update record are erased. Current compact UPB2 banks and project extension tails stay erased; project base sectors remain within the scan. Settings at0xFC000/0xFD000 are outside this loader scan). update: When an update is started from a running Melodee: erase 0xE0000-0xE4FFF, write the package's loader from 0xE0020, verify it, write a LOADER.BIN head at 0xE0000, wait for the host's success, then write the update record at 0xE4F00 and reset. Any failure erases the area again. Melodee stages its own family's loader (marked FELUCCA-LOADER-1) or the official M-VAVE loader; the official one only if the package's flash head 0x0000-0x3FFF equals the unit's, and that loader rewrites the whole flash.bin including the head (the code's own comment) (an M-UPGRADE session from the installer or the web installer's Return to V15). every start-up: At startup ota_staged checks the loader outer/inner headers and CRCs, own identity marker, compressed-block lengths and total decompressed-length accounting. It does not decompress or validate the compressed body contents. Structurally accepted own staging is retained: if it ends before the final sector, only dirty record sector 0xE4000 is erased; if it extends into that sector, all is retained. Staging that fails these structural checks is scanned and all five sectors are erased when any byte is used. Cleanup does not run after an earlier boot maintenance error (With flash_ok and no earlier boot maintenance error: retain structurally accepted own loader staging, even if corruption inside an unchecked compressed body remains; otherwise erase dirty staging). first start-up after another firmware: Read supported legacy preset banks, convert UPB1/FM6/CZ/P5 into shared UPB2 in existing A/B objects. FM6 sidecars are embedded before source conversion. Old Prophet slots 18-25 spill into the two extra positions of former 16-slot banks, then new bank21. Only needed valid-used spill records write a destination. Missing matching bank alone does not write. Same-object FELU record with unsupported bank shape, or invalid used records inside a readable bank, causes RESETTING PRESETS and immediate A/B bank save, no question. Valid entries are preserved; unreadable entries are discarded. Foreign header mismatches have no matching commit and remain empty/unwritten. Explicit separate confirmation from a preset error writes WIPE-PENDING in bank21 then empties every preset object twice. A later boot with the marker resumes this wipe automatically (Only matching committed bank repair/conversion or required legacy Prophet spill; absent/mismatched headers by themselves are untouched. Interrupted confirmed wipe resumes). every start-up: At boot missing/foreign/invalid settings are reset, or supported legacy settings ownership/normalization saved, immediately without a question. OVERCLOCK fault saves have been removed (when defaults, ownership or normalization differ; unknown owned schemas/templates protected). every start-up: Holding OCT- and OCT+ at power-on runs the panel calibration and saves the settings (only when both buttons are held at power-on (an owner action)). every start-up: A loaded supported older Melodee BOOT project (FUN16-FUN21, standalone or nested in FBKK) can be repacked to FUN22 by default-on autosave after 5 seconds stopped and untouched, only if packed bytes differ. Same base/extension address pairs. Projects remain OLD FORMAT protected when no supported parser succeeds; they are not part of preset startup repair (A supported older BOOT project loads, default-on autosave is enabled, transport stops and packed bytes differ after five seconds untouched). update: The host recovery tool (for a unit in UBOOT) first reads the whole flash into a backup file, then writes only program sectors 0x4000-0x92FFF that differ, refusing any other address. 1.3.2's tool also accepts the unmodified official V15 FM-1.fwsc (pinned SHA-256); the same range applies (run by the owner with --write). update: Back up and return to official V15 still verifies the package, captures complete editor archive unless Skip backup is selected, asks confirmation, and installs using the official loader (same flash-head requirement). Backup capability detection now accepts 1.4 archive support independently of motion/UI versions. Rescue-loader resume requires prior-backup or skip acknowledgement. Current archive has 29 IDs, including new shared tail bank. Official V15 subsequent data writes remain unverified by this source (owner action; refuses an unverified package; from the update loader (no running Melodee) it needs the 'already backed up' or 'skip backup' box).

  • Stock V15: Possibly at risk (layout reported or inferred): stock settings (and possibly patterns); stock Bluetooth data; stock voices (128 user patches, banks A-D).
  • Baud Girl FM-1+VA: Possibly at risk (layout reported or inferred): Baud Girl presets (128); Baud Girl patterns (16, with locks).
  • Felucca: At risk by itself: FM6 patches of the FM6 user presets; user presets 1-16; user presets 17-32; settings, button calibration, favourites, MIDI LEARN map. At risk by itself, under a condition: project slot A; project slot B; project slot C; project slot D; user sample slot USR3; the autosave (the music as you left it); FM6 voice bank B1-B32. At risk when you act: user sample slot USR1; user sample slot USR2.
  • SLOOP: At risk by itself: the music in progress (autosave); user sounds U01-U16; user sounds U17-U32; settings, calibration, song order, SYN1-4 kits, MIDI LEARN, theme and favourites. At risk by itself, under a condition: song section A (a whole project); song section B (a whole project); song section C (a whole project); song section D (a whole project); user sample slot USR3 (header at 0xC8000); FM6 patch bank B1-B27; user sample slot USR4 (header at 0xE7000). At risk when you act: user sample slot USR1 (header at 0xA0000); user sample slot USR2 (header at 0xB4000).
  • X0X: At risk by itself: the whole X0X project (settings, sound, all 32 patterns, song, knob motion). At risk by itself, under a condition: break loops slot 3; X0X button calibration. At risk when you act: break loops slot 1; break loops slot 2.
  • JIANT: At risk by itself: FM6 patches of the FM6 user sounds; user sounds U01-U16; user sounds U17-U32; settings, calibration, favourites, MENU options. At risk by itself, under a condition: song 1 section A (a whole project); song 1 section B (a whole project); song 1 section C (a whole project); song 1 section D (a whole project); song 7: four sections (whole projects); song 8: four sections (whole projects); which song is current, every song's rows and scenes; the music in progress (RESTORE LAST); FM6 voice bank B1-B32. At risk when you act: song 2: four sections (whole projects); song 3: four sections (whole projects) (some of it lost); song 4: four sections (whole projects) (some of it lost); song 5: four sections (whole projects) (some of it lost); song 6: four sections (whole projects).
  • FoMni: At risk by itself: FoMni setup (pages, chord buttons, lights). At risk by itself, under a condition: FoMni button calibration.
  • AMB-1: At risk by itself: AMB-1 pieces and setup. At risk by itself, under a condition: AMB-1 panel calibration.
  • ChoralRoot: At risk by itself: 32 imported DX7 voices; options, playing setup and panel calibration. At risk by itself, under a condition: recorded loop 1; recorded loop 2; recorded loop 3; recorded loop 4; recorded loop 5; recorded loop 6; recorded loop 7; recorded loop 8; recorded loop 9; recorded loop 10. At risk when you act: CZ-1 bank A (16 tones); CZ-1 bank B (16 tones); CZ-1 bank C (16 tones); CZ-1 bank D (16 tones); CZ-1 bank E (16 tones); CZ-1 bank F (16 tones); CZ-1 bank G (16 tones); CZ-1 bank H (16 tones); last global-save session; favourite marks, chord/bass type and filter; 128 saved sounds with their complete engine patches (some or all of it lost).
  • GHOULBOX: At risk by itself: FM6 patches for user sounds; user sounds 1–16; user sounds 17–32; settings and panel calibration. At risk by itself, under a condition: project A; project B; project C; project D; user sample slot USR3; music in progress (RESTORE LAST); FM6 voice bank B1–B32. At risk when you act: user sample slot USR1; user sample slot USR2.
  • M-VAVE FM-1 Open: At risk by itself: Open shared sample audio. At risk when you act: Open USER project 1; Open USER project 2; Open USER project 3; Open USER project 4; Open USER project 5; Open USER project 6; Open USER project 7; Open USER project 8; Open USER project 9; Open USER project 10; Open USER project 11; Open USER project 12; Open USER project 13; Open USER project 14; Open USER project 15; Open USER project 16; Open device preferences. Installing this firmware replaces Open’s sixteen USER projects, preferences and sample header before its first start, including the first 24 KiB of sample storage. This follows Open’s source-defined USER layout and the incoming program range; export projects and device samples before leaving Open.
  • FM-106: At risk by itself: octave, last selected preset and MIDI preferences. At risk by itself, under a condition: older stored user bank, if present (Beta4 does not store new edits). A valid user bank stored by an earlier FM-106 build can still be present and readable in Beta4; the bank risks listed here, if any, apply if it exists. FM-106 Beta4’s new user-sound edits are only in memory: panel save, delete and librarian bank commit do not store them, even when they report success. Read the unit into the librarian and export both user banks before switching or powering off; those exports omit sequence notes, locks and extended controls.
  • Hortator: At risk by itself: settings and panel calibration. At risk by itself, under a condition: project A; project B; project C; project D; user samples USR3. At risk when you act: user samples USR1; user samples USR2.
  • OberVave: At risk by itself: pattern 1 (its B-track sound can change if it uses a saved program; its pattern notes remain; other writes can also erase it); pattern 2 (its B-track sound can change if it uses a saved program; its pattern notes remain; other writes can also erase it); pattern 3 (its B-track sound can change if it uses a saved program; its pattern notes remain; other writes can also erase it); pattern 4 (its B-track sound can change if it uses a saved program; its pattern notes remain; other writes can also erase it); pattern 5 (its B-track sound can change if it uses a saved program; its pattern notes remain; other writes can also erase it); pattern 6 (its B-track sound can change if it uses a saved program; its pattern notes remain; other writes can also erase it); pattern 7 (its B-track sound can change if it uses a saved program; its pattern notes remain; other writes can also erase it); saved programs and global settings; pattern 8 (its B-track sound can change if it uses a saved program; its pattern notes remain).
  • Polly: At risk by itself: Polly setup and channel sounds. At risk by itself, under a condition: Optional QY70 style bank; All four Polly songs; Polly shared memory 1; Polly shared memory 2; Polly shared memory 3; Polly shared memory 4; Polly button and encoder calibration. At risk when you act: Polly shared memory 5; Polly shared memory 6; Polly shared memory 7; Polly shared memory 8; Polly shared memory 9; Polly shared memory 10; Polly shared memory 11; Polly shared memory 12; Polly shared memory 13; Polly shared memory 14; Polly shared memory 15; Polly shared memory 16.
  • Skiff: At risk by itself: user sound bank 1; user sound bank 2; settings, calibration and favourites. At risk by itself, under a condition: project A; project B; project C; project D; user sounds’ own FM6 patches; user sample USR3; last session; shared 64-pattern pool (some or all of it lost). At risk when you act: user sample USR1; user sample USR2.
• What the next firmware does to Melodee's data.
  • Stock V15: Possibly at risk (layout reported or inferred): shared user presets U289-U378; shared user presets U379-U384; shared user presets U109-U126; project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018; shared user presets U019-U036; shared user presets U037-U054; shared user presets U055-U072; shared user presets U127-U144.
  • Baud Girl FM-1+VA: Possibly at risk (layout reported or inferred): shared user presets U289-U378; shared user presets U379-U384; shared user presets U109-U126; project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018; shared user presets U019-U036; shared user presets U037-U054; shared user presets U055-U072; shared user presets U127-U144.
  • Felucca: At risk by itself: shared user presets U037-U054; settings, factory favourites, calibration, saved template. At risk by itself, under a condition: shared user presets U055-U072. At risk when you act: shared user presets U289-U378 (some of it lost); shared user presets U379-U384; shared user presets U109-U126; project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018; shared user presets U019-U036.
  • SLOOP: At risk by itself: shared user presets U109-U126; settings, factory favourites, calibration, saved template. At risk when you act: shared user presets U289-U378 (some of it lost); shared user presets U379-U384; project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018; shared user presets U019-U036; shared user presets U037-U054; shared user presets U055-U072; shared user presets U127-U144.
  • X0X: At risk by itself: shared user presets U289-U378 (some of it lost); shared user presets U379-U384; shared user presets U019-U036; settings, factory favourites, calibration, saved template. At risk when you act: project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018.
  • JIANT: At risk by itself: shared user presets U073-U090; settings, factory favourites, calibration, saved template. At risk by itself, under a condition: shared user presets U037-U054; shared user presets U055-U072. At risk when you act: shared user presets U289-U378 (some of it lost); shared user presets U379-U384; shared user presets U109-U126; project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288 (some of it lost); shared user presets U001-U018; shared user presets U019-U036.
  • FoMni: At risk by itself: settings, factory favourites, calibration, saved template. At risk when you act: shared user presets U001-U018.
  • AMB-1: At risk by itself: settings, factory favourites, calibration, saved template. At risk when you act: shared user presets U001-U018.
  • ChoralRoot: At risk by itself: project C: patterns, song, sounds, motion, recordings; shared user presets U145-U288 (some of it lost); shared user presets U073-U090; shared user presets U091-U108; settings, factory favourites, calibration, saved template. At risk by itself, under a condition: project D: patterns, song, sounds, motion, recordings. At risk when you act: shared user presets U289-U378 (some of it lost); shared user presets U379-U384; shared user presets U109-U126; project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; shared user presets U001-U018; shared user presets U019-U036.
  • GHOULBOX: At risk by itself: shared user presets U037-U054; settings, factory favourites, calibration, saved template. At risk by itself, under a condition: shared user presets U109-U126; shared user presets U055-U072. At risk when you act: shared user presets U289-U378 (some of it lost); shared user presets U379-U384; project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018; shared user presets U019-U036.
  • M-VAVE FM-1 Open: At risk by itself: shared user presets U289-U378; shared user presets U379-U384; shared user presets U109-U126. At risk when you act: project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018; shared user presets U019-U036; shared user presets U037-U054; shared user presets U055-U072; shared user presets U127-U144; settings, factory favourites, calibration, saved template. The factory-sample write runs by itself right after the Workbench installs Open, before any project save. The source-built V12 bank erases 0x8D000–0x9FFFF without another sample question. The shipped Workbench asset was not compared with the source.
  • FM-106: At risk by itself: settings, factory favourites, calibration, saved template.
  • Hortator: At risk by itself: settings, factory favourites, calibration, saved template. At risk when you act: shared user presets U289-U378 (some of it lost); shared user presets U379-U384.
  • OberVave: At risk by itself: project C: patterns, song, sounds, motion, recordings (damaged (part of it written over)); project D: patterns, song, sounds, motion, recordings (damaged (part of it written over)); shared user presets U127-U144; settings, factory favourites, calibration, saved template.
  • Polly: At risk by itself: shared user presets U289-U378 (some of it lost); shared user presets U379-U384; shared user presets U109-U126; project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; settings, factory favourites, calibration, saved template. At risk by itself, under a condition: shared user presets U055-U072. At risk when you act: project D: patterns, song, sounds, motion, recordings; shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018; shared user presets U019-U036; shared user presets U037-U054; shared user presets U127-U144.
  • Skiff: At risk by itself: project A: patterns, song, sounds, motion, recordings; project B: patterns, song, sounds, motion, recordings; project C: patterns, song, sounds, motion, recordings; project D: patterns, song, sounds, motion, recordings; shared user presets U037-U054; shared user presets U055-U072; shared user presets U127-U144; settings, factory favourites, calibration, saved template. At risk by itself, under a condition: shared user presets U289-U378 (some of it lost); shared user presets U379-U384; shared user presets U109-U126. At risk when you act: shared user presets U145-U288; shared user presets U073-U090; shared user presets U091-U108; shared user presets U001-U018; shared user presets U019-U036.
• Who reads whose data. No other firmware reads Melodee's data, and Melodee reads none of theirs.
• Every way each write can happen, for all mapped firmwares: the flash atlas's table. Read in each firmware's source (closed ones: their docs or third-party reports); nothing was tested on a unit.

• Updating or going back. The current editor reads preceding complete backups. The supplied v1.3.2 cannot read v1.4.1 shared preset banks, FUN22 projects or the TPLL template. With autosave on, merely loading an older project can rewrite it as FUN22 after 5 seconds stopped and idle. Normal first startup converts a supported v1.3.x template to TPLL during the settings repair. Back up with the previous firmware before updating if you may return. In v1.3.2 these projects show OLD FORMAT and are protected; the unreadable template is protected too. Compatibility with v1.4.0 was not checked. Projects and templates keep their track count; older formats load with four tracks. Early PROPHET banks at 0x89000 are still ignored.
• Backup limitation read in source. A nondefault voice BUDGET is packed into the saved settings. The current backup settings validator still accepts only the old USB-setting range, so that settings object can be refused during restore. Nothing here was tried on a unit.
• Returning to official V15. The updated installer accepts Melodee 1.4's backup capability, saves a backup before asking to flash, and still offers Skip backup. Stock cannot read Melodee's music and can overwrite it. The return does not require installing 1.4.1 first if you already run 1.4.0.
• Startup and the second core. Current downloads use both cores. Fault checks can retire the second core until power-off; an early crash starts the next session on one core. There is no OVERCLOCK menu or current Single core download. The boot stub can request the retained update loader after an interrupted update; the first installation's boot-sector write still needs uninterrupted power.

Mapped from keremimo/melodee at v1.4.1 (1cccd69), 2026-10-16. This refresh was read in the release source; nothing was tested on a unit. Historical check notes in the JSON describe v1.3.2. The sources are in melodee.json. Melodee is GPL-3.0-only, by Kerem Kilic (Ellic Studio), based on Felucca by Leo Kuroshita (Hügelton Instruments). This is an independent guide written in our own words, not affiliated with Melodee, Felucca, Hügelton Instruments or M-VAVE.