FM-1 firmware · v0.3

fm1-chord

A chord instrument with a strumplate, scale notes, drums, looping and chord games. The seven left white keys choose chords, and the nine to their right strum them; LEAD uses all white keys for scale notes. A full synth interface sits underneath.

What it is: A strummed chord instrument with scale playing, drums, a looper and games about chords
Best for: Playing chord changes and strumming songs; learning harmony through games
Install: GitHub release or hub
Scan: Scanned, nothing harmful found · Oct 30 What we checked

What each control does on fm1-chord

TapSwipe across the panel, then tap any control to see what it does on fm1-chord.

Printable skin (PDF)Key strips (PDF)

Start here

Read from the v0.3 source.

The modes

Mode	Get there	What it does
Chord interface	Starts here; from the synth interface hold HOME and press SAVE.	Common controls across the chord pages; the selected play mode keeps the keys.
Chord home screen	Release HOME after a short press.	Shows the selected play mode, chord or notes, sound, effects and looper state.
KEY menu	Press SEL.	Key, scale, layout, chord modifiers, bass and voicing.
SOUND menu	Press FX or GLO.	Sound, envelope, effects, speaker and MIDI input.
MODE menu	Press EDIT.	Play mode, tempo, sequence, drums and game options.
PRESETS menu	Press SAVE.	P1/A, P2/B, P3/C and P4/D share saved music with the synth PROJECT slots; saving here asks no overwrite question and can damage the next preset’s chord settings.
LOOPER menu	Press SEQ.	Four event layers, loop length, metronome and clearing.
Envelope Presets	Press ENV.	A list of 7 envelope presets, applied as the choice moves.
Vibrato Choices	Press LFO.	A list of 4 vibrato choices, applied as the choice moves.
Sounds	Turn PRESETS.	A list of 38 sounds, applied as the choice moves.
Play Modes	Turn ALGORITHM.	A list of 12 play modes, applied as the choice moves.
PLAY	Turn ALGORITHM to PLAY.	Seven chord keys and a nine-key strumplate, with optional slash bass.
STRUM	Turn ALGORITHM to STRUM.	Chord keys roll their notes 200, 80 or 40 milliseconds apart, while the nine right white keys form a strumplate.
LEAD	Turn ALGORITHM to LEAD.	All sixteen white keys play separate scale notes from the tonic at C4, with polyphonic playing.
DRONE	Turn ALGORITHM to DRONE.	A chord remains after its key is released until another chord or mode replaces it, while strumplate notes still end on release.
ARP	Turn ALGORITHM to ARP.	The last held chord feeds the arpeggiator, with ARP ONLY, CHORD+ARP or RHYTHM+ARP layers and a separate strumplate.
REPEAT	Turn ALGORITHM to REPEAT.	Held chord keys pulse at the chosen rate while the strumplate plays separate notes.
SEQUENCER	Turn ALGORITHM to SEQUENCER.	White keys enter chords into a repeating four-to-sixteen-step sequence, with one beat per step.
DRUM	Turn ALGORITHM to DRUM.	The white keys repeat seven drum pads, and holding a direction repeats held pads at that direction’s rate.
DRUM LOOP	Turn ALGORITHM to DRUM LOOP.	White keys select seven loop styles with eight variations each; selecting this mode starts the loop.
CHORD HIRO	Turn ALGORITHM to CHORD HIRO.	Play the displayed chord degrees in time across ten song charts, with four timing difficulties and a practice speed.
EAR TRAINER	Turn ALGORITHM to EAR TRAINER.	Identify chords, four-chord progressions, modified chords or progressions, and intervals across six levels.
MIXER	Turn ALGORITHM to MIXER.	White keys switch the four looper layers and metronome on or off.
Hidden synth: common controls	Hold HOME on the chord interface to enter the synth interface.	Common behavior on ordinary synth pages; menu, naming, confirmation and held-button layers override these controls.

Play chords, strum and use the keys

The selected track's chord-machine mode gives the keys these jobs, including in the underlying synth interface while CHRD stays on HI; held layer buttons, the naming screen and the drum grid take over the keys.

Do this	What happens
Choose PLAY with ALGORITHM	The seven left white keys play chords and the nine right white keys form the strumplate.
Choose STRUM	A chord key rolls its notes with 200, 80 or 40 milliseconds between notes, set by STRUM speed.
Choose LEAD	Every white key plays one scale note, starting at the selected tonic around C4; several keys can sound together and there is no strumplate.
Choose DRONE	A chord stays after release and the next chord replaces it; its release envelope provides the overlap.
Choose ARP	The most recently held chord feeds the arp; ARP ONLY plays its pattern alone, CHORD+ARP adds the chord and RHYTHM+ARP pulses the chord beneath it.
Choose REPEAT	Held chords pulse at the selected rate; a key pressed during a silent gap joins the next pulse.
Play F3, G3, A3, B3, C4, D4 or E4 in DEGREE layout	These are chord degrees 1 through 7, from the selected tonic.
Choose PIANO layout	Those keys use their own letters, snapped to the selected scale, instead of counting degrees from F3.
Play F4, G4, A4, B4, C5, D5, E5, F5 or G5 in PLAY, STRUM, DRONE, ARP or REPEAT	They play strumplate notes 1 through 9, rising through the notes of the last built chord; before a chord has played, the plate uses the tonic chord.
Release a strumplate key	Its note ends, including with HOLD on or in DRONE.
Release a chord in PLAY or STRUM	Its notes end unless HOLD is on; STRUM also cancels the rest of its unfinished roll.
Release a chord in ARP	Unless HOLD keeps it, the arp follows the last chord key still held and stops when no chord remains.
Release a chord in REPEAT	Unless HOLD keeps it, that chord ends; the pulse stops when no chord remains.
Release a chord in DRONE	The chord continues until another chord or mode replaces it.
Change a direction, press INVERT or press LOCK while a plate note sounds	The current source can rebuild that plate note as a complete chord based on the plate key's own degree.

The octave buttons move the chord keyboard and strumplate together; the chord keys normally sound an octave below their printed pitches, while LEAD starts an octave above the chord keys.

Enter a chord sequence

Do this	What happens
Choose SEQUENCER	All sixteen white keys enter chords, repeating the seven degrees across higher octaves; there is no strumplate here.
Press a white key	Replaces the current step with its degree, octave and held direction, sounds the chord, then advances the entry cursor without a question.
Hold a direction and press a white key	Stores that direction with the step; the step does not retain an inversion or chord lock.
Press F#3	Replaces the current step with a rest and advances the cursor without a question.
Release a white key	Ends the live chord unless HOLD is on; the entered step stays in the sequence.
Change the key, scale, bass or voices	Playback rebuilds the sequence's chords from those current choices.

The sequence spans four to sixteen steps and each step lasts one beat; the MODE menu chooses its length, SELECT on the home screen moves the entry cursor, and PLAY starts or stops playback.

Coming from another firmware

Pick the firmware on your FM-1 now to see what installing fm1-chord does to its data.

1 · Before you switch, back up on Stock V15

Back up first. Keep the DX7 .syx banks you loaded so you can send them again (a bank arrives over MIDI SysEx and you pick A-D). Another route: installing Baud Girl’s FM-1+VA keeps your saved stock presets, and its Device Manager can then save all 128 presets as a .syx file. FM-1+VA is closed source; install it at your own risk. It is unknown whether stock's 16 patterns come through or can then be backed up. Write down patterns you care about. To come back, you need M-VAVE's own V15 file from its download page; the installers check it byte for byte. Stock V15’s automatic pattern saves and SAVE writes may also replace ChoralRoot’s legacy sounds 1–32, VA patches, FM6 patches 1–32, CZ patches 1–32 and FM TONE patches, kept for returning to ChoralRoot 0.21 or older. Stock V15’s write locations are uncertain. Stock V15 has no backup of its own; it sends notes over MIDI, never voice data.

2 · What happens to your Stock V15 data

Possibly at risk

stock settings (and possibly patterns)

What Les checked

fm1-chord v0.3Scanned October 30, 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
A serial port, which many FM-1 firmwares keep for debugging. It can't type into your computer.

Not checked yet

Its update loader, the part that writes the firmware onto your FM-1. A person hasn't reviewed it yet.
What it does while it's running. We read the file; we don't run it.
Whether the file was built from its published source code.

StatusScanned, nothing harmful found

Les has mapped its controls for v0.3.

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

Everything else on fm1-chord

Start, play and find a page

The firmware calls the printed SEL button SCL. The encoders turn; they do not click. Play-mode key roles keep working while chord menus are open. In the hidden synth they also apply when CHRD is HI and no grid or shortcut layer takes the keys.

Change the chord with the black keys

Do this	What happens
Press F#3 (INVERT) with a chord held	Cycles its inversion through root, first and second; an unlocked inversion clears when the chord is released.
Press G#3 (LOCK) with a chord and a direction held	Records the direction's chord change and the inversion for later presses; repeating LOCK on that chord unlocks it.
Press G#3 with an inverted chord held and no direction	Locks that inversion and the plain chord; pressing LOCK again unlocks it.
Release G#3 or F#3	There is no extra release action.
Keep the direction held after pressing LOCK	The source applies that direction again to the stored change until release; UP in DEFAULT can flip the newly locked chord back, and root shifts can be doubled.
Change the selected key or scale after locking	The locked chord follows the new key and scale; its quality and relative root shift are kept.
Press A#3 (HOLD)	Toggles the latch for chords and LEAD notes; switching it off releases latched keys on the next audio block, but DRONE sustains independently and does not end when HOLD is switched off.
Release A#3	HOLD keeps its chosen on/off state.
Press a chord that HOLD already latched	Takes it back under the key without starting it again.
Hold two directions	The most recently pressed one wins; releasing it returns to the previous direction still held.
Change a direction while a chord sounds	Unchanged pitches stay sounding and the changed pitches are replaced; a STRUM roll in progress is replaced by the new chord.

Each direction uses the selected JOYSTICK table; OG has the same chord changes as DEFAULT.

Key and direction	DEFAULT / OG	EXTEND	CHROM	BORROW	AUTO-DRUM rate
C#4, UP	Swap major/minor	Swap major/minor	Minor-major seventh	Dominant seventh	Quarter notes
D#4, UP-RIGHT	Dominant seventh	Dominant ninth	Altered dominant seventh	Dominant seventh, root down two semitones	Swing eighths
F#4, RIGHT	Major/minor seventh; half-diminished for diminished chords	Added eleventh; minor eleventh for minor chords	Same quality, root up one semitone	Diminished seventh, root up one semitone	Eighth notes
G#4, DOWN-RIGHT	Major/minor ninth; half-diminished for diminished chords	Minor eleventh	Half-diminished seventh	Half-diminished seventh	Swing sixteenths
A#4, DOWN	Suspended fourth	Dominant seventh with sharp ninth	Major thirteenth	Swap major/minor	Sixteenth notes
C#5, DOWN-LEFT	Major sixth; suspended second for minor chords	Added ninth	Sixth with ninth	Minor seventh for major chords; major seventh for minor chords	Sixteenth-note triplets
D#5, LEFT	Diminished; minor for diminished chords	Dominant seventh with suspended fourth	Same quality, root down one semitone	Major chord, root down one semitone	Thirty-second notes
F#5, UP-LEFT	Augmented	Half-diminished seventh	Dominant seventh with flat ninth	Dominant seventh, root up six semitones	Swing eighths

In LEAD the direction and inversion choices do not change note pitches; in DRUM LOOP they do not change the playing loop, in MIXER they do not change the mix, and CHORD HIRO judges the degree alone.

Play slash bass

Do this	What happens
Set BASS to SLASH, hold a chord key, then press another in PLAY	The first key supplies the bass and the new key supplies the chord; earlier chords stop.
Use the same gesture in STRUM	The new chord rolls above the first held key's bass.
Release the newer chord in PLAY or STRUM	The earlier bass key returns to its own chord while still held, unless HOLD kept the newer chord.
Release the first bass key while the newer chord remains	The sounding chord is rebuilt over its own root.
Hold a chord, then press another in ARP or REPEAT with SLASH	The new chord uses the first held key's root as its bass, within the mode's arp or pulse behavior.

SLASH is the initial bass setting; LEAD plays independent notes instead of slash chords, and DRONE replaces the earlier chord when a new chord is played.

Play drums, loops and the mixer

The following white-key groups share a job in these modes; their release action ends DRUM pad repeats, leaves DRUM LOOP running, and leaves MIXER switches in their chosen state.

White keys	DRUM pad	DRUM LOOP style	MIXER action
F3, F4, F5	KICK	ROCK	Mute or unmute layer 1
G3, G4, G5	KICK 2	BREAK	Mute or unmute layer 2
A3, A4	SNARE	DUB	Mute or unmute layer 3
B3, B4	HAT CL	FUNK	Mute or unmute layer 4
C4, C5	TOM	HOUSE	No action
D4, D5	BELL	DEMBOW	No action
E4, E5	HAT OP	SWING	Metronome on/off

Do this	What happens
Hold a direction and a DRUM pad, in either order	Repeats held pads at that direction's rate shown above.
Release a DRUM pad	Releases its hit and removes that key from repeats.
Release the last direction	Stops automatic repeats while pad keys can remain held.
Choose DRUM LOOP	Starts its current style and variation automatically.
Press a white key in DRUM LOOP	Selects that key's style and restarts the loop from its beginning, using the chosen variation.
Release a white key in DRUM LOOP	The loop keeps running.
Press a white key in MIXER	Changes its layer or metronome switch at once; release adds no action.

Answer the games

Do this	What happens
Choose CHORD HIRO	The white keys answer chord degrees across the whole keyboard; the chart has ten songs.
Press the required degree in CHORD HIRO	Scores its timing and plays the chart's chord; the chart supplies its own modification, so a held direction is not part of the answer check.
Press the wrong degree in the active window	Counts a miss for that chart chord.
Press too early, while stopped, or after that chart chord was already judged	The press is ignored.
Release a CHORD HIRO key	Does not stop its chart chord; the game sets the sounding duration.
Choose EAR TRAINER	The white keys answer degrees for six levels covering chords, progressions and intervals.
Answer in levels 3 or 4	Both the degree and the held direction must match; other chord levels check the degree, and interval levels check the interval's degree.
Answer while the trainer is waiting	Plays the answer briefly and checks it; presses while the question or result is playing are ignored.
Press F#3 in EAR TRAINER	Replays the question while waiting for an answer.
Release an EAR TRAINER key	Leaves the submitted answer unchanged.

CHORD HIRO uses timing windows of ±200, ±150, ±100 or ±50 milliseconds; EAR TRAINER moves to its next question after showing the result.

Connections and startup

Do this	What happens
Power on holding HOME + SAVE	Holding HOME and SAVE for three seconds after power-on erases saved settings, P1 to P4 snapshots, projects, user sounds and the FM6 bank, resets calibration and reboots without undo; uploaded samples remain.
Power on holding OCT− + OCT+	Starts hardware calibration; boot requests a settings save afterward without a question even if thirty seconds of inactivity cancels to the old mapping, writing only if settings differ.
Press OCT− + OCT+	Holding both octave buttons for five seconds enters the bootloader, with a countdown from two seconds; releasing either earlier cancels.
Turn MASTER	Changes overall output volume.
Press USB-C	Connects USB MIDI in and out, stereo audio capture and firmware updates, with editor and backup support present in source but no working editor route established.
Press USB-C	A working v0.3 editor or backup route has not been established; the repository contains editor source, so record important settings and capture audio externally before switching rather than relying on Save backup or P1–P4.
Press USB-C	If an editor is made operational and verified, its Restore backup asks once in the browser, then replaces included stored items, including empty slots, and loads the current synth project last without undo; interruption can leave a partial restore, and an older file without an FM6 bank leaves that bank unchanged.
Press MIDI input	Receives MIDI through the input jack with the hidden synth’s routing and clock settings; the chord SOUND menu’s MIDI IN choice does not disable incoming notes.
Press Audio output	Uses HOT or LINE output, with LINE reducing the master level by 10 dB when chosen on the SOUND menu.
Connect USB MIDI	Sends chord, arpeggiator, chord-sequence, looper and drum-loop note events over USB MIDI on each track’s channel when USB is configured and its output queue has room.
Send `factory yes` in the USB serial console	Sending factory yes through the USB serial console immediately erases settings and calibration, all P1–P4/A–D projects, user sounds and the FM6 bank, then reboots without another question or undo while uploaded samples remain.

Chord interface

Starts here; from the synth interface hold HOME and press SAVE. Common controls across the chord pages; the selected play mode keeps the keys.

Do this	What happens
Press SEL	Opens or closes the KEY menu.
Press FX / Press GLO	Opens or closes the SOUND menu.
Press EDIT	Opens or closes MODE and counts tempo taps, setting tempo from the third tap when successive gaps stay within 1.5 seconds.
Press ENV	Opens the envelope list, or returns home if that list is already open.
Press LFO	Opens the vibrato list, or returns home if that list is already open.
Press ARP	Switches ARP to PLAY or any other play mode to ARP.
Press SEQ	Opens or closes the LOOPER menu.
Release HOME	Returns to the home screen after a short press.
Hold HOME	Opens the underlying synth interface after more than 0.7 seconds.
Press SAVE	Opens PRESETS unless that menu was already showing.
Turn ALGORITHM	Chooses a play mode with wrapping and briefly shows its list; entering DRUM LOOP starts the loop.
Turn PRESETS	Chooses one of 38 sounds with wrapping, resets its envelope and attack/release overrides, and briefly shows the sound list.
Turn KNOB 1	Changes cutoff by three steps per click and turns the filter on.
Turn KNOB 2	Changes resonance by three steps per click and turns the filter on.
Turn KNOB 3	Changes attack by two steps per click.
Turn KNOB 4	Changes release by two steps per click except on the five SOUND effect rows.
Press OCT+ + OCT−	Outside SOUND and MODE, randomizes the key, scale, tempo, modifier table, bass, voices, sound, arp settings and one of the first six play modes without a question or chord-interface undo.
Release REC	After a short press, advances the selected looper layer through OFF, ARMED, REC, PLAY and OFF; PLAY to OFF discards that layer’s notes without a question, flash write or undo.
Hold REC	After more than 0.7 seconds, clears the selected looper layer without a question or undo and clears all layers if none is playing or recording.
Press PLAY/STOP	Pauses or resumes an existing looper transport outside SEQUENCER, DRUM LOOP and the games, doing nothing if no loop length exists.

Chord home screen

Release HOME after a short press. Shows the selected play mode, chord or notes, sound, effects and looper state.

Do this	What happens
Turn SELECT	Transposes the key for all four tracks, except in SEQUENCER and MIXER.
Press OCT−	Moves the keyboard octave down within −2 to +2, except in MIXER.
Press OCT+	Moves the keyboard octave up within −2 to +2, except in MIXER.
View HOME at rest	On the PLAY, STRUM, LEAD, DRONE, ARP or REPEAT home view, shows degree numbers, strumplate bars, I/L/H marks and direction dots when no key is held or latched, or held keys have no chord or LEAD notes to display, including after DRONE keys are released while the chord keeps ringing.
Read the HOME header	Shows key, scale, nonzero octave, mode, BPM, USB status and battery, with temporary value or status messages replacing the header.

KEY menu

Press SEL. Key, scale, layout, chord modifiers, bass and voicing.

Do this	What happens
Turn SELECT	Moves the menu cursor without changing the selected row’s value.
Screen	Key, scale, layout, chord modifiers, bass and voicing with the selected row and its value.

SOUND menu

Press FX or GLO. Sound, envelope, effects, speaker and MIDI input.

Do this	What happens
Turn SELECT	Moves the menu cursor without changing the selected row’s value.
Screen	Sound, envelope, effects, speaker and MIDI input with the selected row and its value.
Press OCT+ + OCT−	Randomizes the sound, envelope and effects and turns glide off without a question or chord-interface undo.

MODE menu

Press EDIT. Play mode, tempo, sequence, drums and game options.

Do this	What happens
Turn SELECT	Moves the menu cursor without changing the selected row’s value.
Screen	Play mode, tempo, sequence, drums and game options with the selected row and its value.
Press OCT+ + OCT−	Randomizes arp pattern, rate, layering and strum timing without changing the chord sequence or asking for confirmation.

PRESETS menu

Press SAVE. P1/A, P2/B, P3/C and P4/D share saved music with the synth PROJECT slots; saving here asks no overwrite question and can damage the next preset’s chord settings.

Do this	What happens
Turn SELECT	Moves the menu cursor without changing the selected row’s value.
Screen	Shows P1/A, P2/B, P3/C and P4/D as shared project slots, displaying the saved project name or its empty status.
Press SAVE	Immediately replaces the selected shared slot P1/A, P2/B, P3/C or P4/D and its chord settings while the synth transport is stopped, without a question or undo, and saving P1, P2 or P3 also damages the next preset’s chord settings while P4 writes beyond its working storage; chord-sequence steps and looper recordings are excluded.

LOOPER menu

Press SEQ. Four event layers, loop length, metronome and clearing.

Do this	What happens
Turn SELECT	Moves the menu cursor without changing the selected row’s value.
Screen	Four event layers, loop length, metronome and clearing with the selected row and its value.

Envelope Presets

Press ENV. A list of 7 envelope presets, applied as the choice moves.

Do this	What happens
Turn SELECT	Chooses and immediately applies a preset envelope, clearing the attack and release overrides without wrapping at the list ends.
Screen	Shows the active envelope choice until HOME is tapped, SEL, FX, GLO, EDIT, SAVE, SEQ, ENV or LFO changes the page, ALGORITHM or PRESETS opens its temporary mode or sound list, or HOME is held to enter the synth interface; temporary lists expire after 1.5 seconds without a turn, while ARP, PLAY, REC and octave buttons keep this persistent list open.
Press OCT−	Does nothing to the choice in this list.
Press OCT+	Immediately loads P1 without a question or undo, replacing the active project and chord settings if P1 is occupied; the list stays open.

Vibrato Choices

Press LFO. A list of 4 vibrato choices, applied as the choice moves.

Do this	What happens
Turn SELECT	Chooses and immediately applies a vibrato choice without wrapping at the list ends.
Screen	Shows the active vibrato choice until HOME is tapped, SEL, FX, GLO, EDIT, SAVE, SEQ, ENV or LFO changes the page, ALGORITHM or PRESETS opens its temporary mode or sound list, or HOME is held to enter the synth interface; temporary lists expire after 1.5 seconds without a turn, while ARP, PLAY, REC and octave buttons keep this persistent list open.
Press OCT−	Does nothing to the choice in this list.
Press OCT+	Immediately loads P1 without a question or undo, replacing the active project and chord settings if P1 is occupied; the list stays open.

Sounds

Turn PRESETS. A list of 38 sounds, applied as the choice moves.

Do this	What happens
Turn SELECT	Chooses and immediately applies a sound without wrapping at the list ends.
Screen	Shows the sounds with the active choice marked, returning home after 1.5 seconds without a turn or when a panel button is pressed.
Press OCT−	Closes the temporary list and moves the octave down, or changes the layer level if MIXER is selected.
Press OCT+	Closes the temporary list and moves the octave up, or changes the layer level if MIXER is selected.

Play Modes

Turn ALGORITHM. A list of 12 play modes, applied as the choice moves.

Do this	What happens
Turn SELECT	Chooses and immediately applies a play mode without wrapping at the list ends.
Screen	Shows the play modes with the active choice marked, returning home after 1.5 seconds without a turn or when a panel button is pressed.
Press OCT−	Closes the temporary list and moves the octave down, or changes the layer level if MIXER is selected.
Press OCT+	Closes the temporary list and moves the octave up, or changes the layer level if MIXER is selected.

Change key, sound, rhythm and loop settings

On each row, SELECT chooses the row and OCT− / OCT+ changes its value; the tables below name every row. The two octave buttons together randomize immediately, then a continued five-second hold enters the update bootloader.

SEQUENCER

Turn ALGORITHM to SEQUENCER. White keys enter chords into a repeating four-to-sixteen-step sequence, with one beat per step.

Do this	What happens
Turn SELECT	With the home screen showing, moves the chord-step write cursor with wrapping.
Screen	Shows sixteen chord cells, the write cursor, current playback step and active sequence length.
Press PLAY/STOP	Starts the chord sequence from its first step, or stops it.

MIXER

Turn ALGORITHM to MIXER. White keys switch the four looper layers and metronome on or off.

Do this	What happens
Turn SELECT	With the home screen showing, selects one of the four layers.
Screen	Shows each layer’s level, mute and looper state, the selected layer and the metronome setting.
Press OCT−	With the home screen showing, changes the selected layer’s level down by eight steps within 0–127.
Press OCT+	With the home screen showing, changes the selected layer’s level up by eight steps within 0–127.

PLAY

Turn ALGORITHM to PLAY. Seven chord keys and a nine-key strumplate, with optional slash bass.

Do this	What happens
Screen	Shows the chord name, degree, inversion, lock and hold indicators, sounding notes on a piano, active effects and the four looper states.

STRUM

Turn ALGORITHM to STRUM. Chord keys roll their notes 200, 80 or 40 milliseconds apart, while the nine right white keys form a strumplate.

Do this	What happens
Screen	Shows the chord name, degree, inversion, lock and hold indicators, sounding notes on a piano, active effects and the four looper states.

LEAD

Turn ALGORITHM to LEAD. All sixteen white keys play separate scale notes from the tonic at C4, with polyphonic playing.

Do this	What happens
Screen	Shows the sounding scale-note names from low to high, a piano, effects and looper states.

DRONE

Turn ALGORITHM to DRONE. A chord remains after its key is released until another chord or mode replaces it, while strumplate notes still end on release.

Do this	What happens
Screen	Shows the chord name, degree, inversion, lock and hold indicators, sounding notes on a piano, active effects and the four looper states.

ARP

Turn ALGORITHM to ARP. The last held chord feeds the arpeggiator, with ARP ONLY, CHORD+ARP or RHYTHM+ARP layers and a separate strumplate.

Do this	What happens
Screen	Shows the chord name, degree, inversion, lock and hold indicators, sounding notes on a piano, active effects and the four looper states.

REPEAT

Turn ALGORITHM to REPEAT. Held chord keys pulse at the chosen rate while the strumplate plays separate notes.

Do this	What happens
Screen	Shows the chord name, degree, inversion, lock and hold indicators, sounding notes on a piano, active effects and the four looper states.

DRUM

Turn ALGORITHM to DRUM. The white keys repeat seven drum pads, and holding a direction repeats held pads at that direction’s rate.

Do this	What happens
Screen	Shows seven drum pads, held-pad highlights, auto-drum rate, kit and looper timing.

DRUM LOOP

Turn ALGORITHM to DRUM LOOP. White keys select seven loop styles with eight variations each; selecting this mode starts the loop.

Do this	What happens
Screen	Shows the style, variation, six drum lanes across sixteen steps, transport and looper timing.
Press PLAY/STOP	Starts the drum loop from its first step, or stops it.

CHORD HIRO

Turn ALGORITHM to CHORD HIRO. Play the displayed chord degrees in time across ten song charts, with four timing difficulties and a practice speed.

Do this	What happens
Screen	Shows the song, difficulty, upcoming chords, timing feedback, score, combo and final result.
Press PLAY/STOP	Starts a Chord Hiro song, or stops it.

EAR TRAINER

Turn ALGORITHM to EAR TRAINER. Identify chords, four-chord progressions, modified chords or progressions, and intervals across six levels.

Do this	What happens
Screen	Shows the level, listen or answer phase, result, streak and score.
Press PLAY/STOP	Starts a new Ear Trainer round.

SOUND > REVERB

Open SOUND and turn SELECT to REVERB. The REVERB row is selected.

Do this	What happens
Turn KNOB 4	Changes reverb amount by four steps within 1–127 and enables its first type if it was off.
Press OCT− / Press OCT+	Cycles OFF, ROOM, HALL, PLATE, SPRING and AMBIENT reverb types (OCT− backward, OCT+ forward).

SOUND > DELAY

Open SOUND and turn SELECT to DELAY. The DELAY row is selected.

Do this	What happens
Turn KNOB 4	Changes delay amount by four steps within 1–127 and enables its first type if it was off.
Press OCT− / Press OCT+	Cycles delay off or timing of 1/4, 1/8, 1/16, 1/16T and 1/32 (OCT− backward, OCT+ forward).

SOUND > CHORUS

Open SOUND and turn SELECT to CHORUS. The CHORUS row is selected.

Do this	What happens
Turn KNOB 4	Changes chorus amount by four steps within 1–127 and enables its first type if it was off.
Press OCT− / Press OCT+	Cycles OFF, LIGHT, WARM, WIDE and LUSH chorus types (OCT− backward, OCT+ forward).

SOUND > FLANGER

Open SOUND and turn SELECT to FLANGER. The FLANGER row is selected.

Do this	What happens
Turn KNOB 4	Changes flanger amount by four steps within 1–127 and enables its first type if it was off.
Press OCT− / Press OCT+	Cycles OFF, SLOW, JET, DEEP and METAL flanger types (OCT− backward, OCT+ forward).

SOUND > TREMOLO

Open SOUND and turn SELECT to TREMOLO. The TREMOLO row is selected.

Do this	What happens
Turn KNOB 4	Changes tremolo amount by four steps within 1–127 and enables its first type if it was off.
Press OCT− / Press OCT+	Cycles tremolo off or timing of 1/4, 1/8, 1/16, 1/16T and 1/32 (OCT− backward, OCT+ forward).

KEY > KEY

Open KEY and turn SELECT to KEY. The KEY row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes the key for all four tracks in semitone steps with wrapping (OCT− backward, OCT+ forward).

KEY > OCTAVE

Open KEY and turn SELECT to OCTAVE. The OCTAVE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes the keyboard octave within −2 to +2 (OCT− backward, OCT+ forward).

KEY > SCALE

Open KEY and turn SELECT to SCALE. The SCALE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles the ten scales for all four tracks (OCT− backward, OCT+ forward).

KEY > LAYOUT

Open KEY and turn SELECT to LAYOUT. The LAYOUT row is selected.

Do this	What happens
Press OCT− / Press OCT+	Switches between degree keys and roots based on the printed white-key letters snapped to the scale.

KEY > JOYSTICK

Open KEY and turn SELECT to JOYSTICK. The JOYSTICK row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles DEFAULT, EXTEND, CHROM, BORROW and OG chord-modifier tables (OCT− backward, OCT+ forward).

KEY > BASS

Open KEY and turn SELECT to BASS. The BASS row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles OFF, ROOT and SLASH, where the first held chord key supplies the bass for later chords (OCT− backward, OCT+ forward).

KEY > VOICES

Open KEY and turn SELECT to VOICES. The VOICES row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles the 8, 4, 2 and 1 voicing choices (OCT− backward, OCT+ forward).

KEY > VOICE LEAD

Open KEY and turn SELECT to VOICE LEAD. The VOICE LEAD row is selected.

Do this	What happens
Press OCT− / Press OCT+	Toggles voicing that brings each chord closer to the previous one.

KEY > RANDOMIZE ALL

Open KEY and turn SELECT to RANDOMIZE ALL. The RANDOMIZE ALL row is selected.

Do this	What happens
Press OCT− / Press OCT+	Randomizes the key, scale, tempo, modifier table, bass, voices, sound, pattern settings and one of the first six play modes without a question or chord-interface undo.

SOUND > SOUND

Open SOUND and turn SELECT to SOUND. The SOUND row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles the 38 sounds and resets the envelope and attack/release overrides (OCT− backward, OCT+ forward).

SOUND > ENVELOPE

Open SOUND and turn SELECT to ENVELOPE. The ENVELOPE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles seven envelope presets and clears the attack and release overrides (OCT− backward, OCT+ forward).

SOUND > ATTACK

Open SOUND and turn SELECT to ATTACK. The ATTACK row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes the attack override by four steps within 1–127 (OCT− backward, OCT+ forward).

SOUND > RELEASE

Open SOUND and turn SELECT to RELEASE. The RELEASE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes the release override by four steps within 1–127 (OCT− backward, OCT+ forward).

SOUND > FILTER WHEEL

Open SOUND and turn SELECT to FILTER WHEEL. The FILTER WHEEL row is selected.

Do this	What happens
Press OCT− / Press OCT+	Toggles the filter.

SOUND > CUTOFF

Open SOUND and turn SELECT to CUTOFF. The CUTOFF row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes cutoff by four steps within 0–127 and enables the filter (OCT− backward, OCT+ forward).

SOUND > RESONANCE

Open SOUND and turn SELECT to RESONANCE. The RESONANCE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes resonance by four steps within 0–127 and enables the filter (OCT− backward, OCT+ forward).

SOUND > HI-PASS

Open SOUND and turn SELECT to HI-PASS. The HI-PASS row is selected.

Do this	What happens
Press OCT− / Press OCT+	Toggles the high-pass filter.

SOUND > LFO

Open SOUND and turn SELECT to LFO. The LFO row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles OFF, LOW, MED and HIGH vibrato (OCT− backward, OCT+ forward).

SOUND > GLIDE

Open SOUND and turn SELECT to GLIDE. The GLIDE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles OFF, SHORT, MEDIUM and LONG glide (OCT− backward, OCT+ forward).

SOUND > DRIVE

Open SOUND and turn SELECT to DRIVE. The DRIVE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles OFF, TUBE, DRIVE, DIST and FUZZ distortion (OCT− backward, OCT+ forward).

SOUND > TAPE

Open SOUND and turn SELECT to TAPE. The TAPE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles OFF, LOFI, VINYL and TAPE coloration (OCT− backward, OCT+ forward).

SOUND > STEREO

Open SOUND and turn SELECT to STEREO. The STEREO row is selected.

Do this	What happens
Press OCT− / Press OCT+	Toggles stereo processing.

SOUND > SPEAKER

Open SOUND and turn SELECT to SPEAKER. The SPEAKER row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles FLAT, LOWCUT and BASS+ speaker processing, whose change alone does not schedule a save (OCT− backward, OCT+ forward).

SOUND > OUT LEVEL

Open SOUND and turn SELECT to OUT LEVEL. The OUT LEVEL row is selected.

Do this	What happens
Press OCT− / Press OCT+	Switches HOT output and LINE output with a 10 dB reduction.

SOUND > MIDI IN

Open SOUND and turn SELECT to MIDI IN. The MIDI IN row is selected.

Do this	What happens
Press OCT− / Press OCT+	Toggles the displayed MIDI IN choice, which neither disables incoming MIDI notes nor survives save and recall reliably in v0.3.

SOUND > RANDOMIZE SOUND

Open SOUND and turn SELECT to RANDOMIZE SOUND. The RANDOMIZE SOUND row is selected.

Do this	What happens
Press OCT− / Press OCT+	Randomizes the sound, envelope and effect choices and switches glide off without a question or chord-interface undo.

MODE > MODE

Open MODE and turn SELECT to MODE. The MODE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles the twelve play modes (OCT− backward, OCT+ forward).

MODE > TEMPO

Open MODE and turn SELECT to TEMPO. The TEMPO row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes tempo by one BPM within 40–240 (OCT− backward, OCT+ forward).

MODE > STRUM SPEED

Open MODE and turn SELECT to STRUM SPEED. The STRUM SPEED row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles SLOW, MEDIUM and FAST chord roll timing (OCT− backward, OCT+ forward).

MODE > ARP PATTERN

Open MODE and turn SELECT to ARP PATTERN. The ARP PATTERN row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles UP, DOWN, UP/DOWN, DOWN/UP, RANDOM and FINGERPICK (OCT− backward, OCT+ forward).

MODE > ARP RATE

Open MODE and turn SELECT to ARP RATE. The ARP RATE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles 1/1, 1/2, 1/4, 1/8, 1/16, 1/16T, 1/32, SWING 8 and SWING 16 (OCT− backward, OCT+ forward).

MODE > ARP LAYER

Open MODE and turn SELECT to ARP LAYER. The ARP LAYER row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles ARP ONLY, CHORD+ARP and RHYTHM+ARP (OCT− backward, OCT+ forward).

MODE > SEQ LENGTH

Open MODE and turn SELECT to SEQ LENGTH. The SEQ LENGTH row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes the chord-sequence length in four-step increments within 4–16 without clearing the hidden steps (OCT− backward, OCT+ forward).

MODE > DRUM KIT

Open MODE and turn SELECT to DRUM KIT. The DRUM KIT row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles the four drum kits (OCT− backward, OCT+ forward).

MODE > LOOP STYLE

Open MODE and turn SELECT to LOOP STYLE. The LOOP STYLE row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles ROCK, BREAK, DUB, FUNK, HOUSE, DEMBOW and SWING drum-loop styles (OCT− backward, OCT+ forward).

MODE > LOOP VARIATION

Open MODE and turn SELECT to LOOP VARIATION. The LOOP VARIATION row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles ORIG, GHOST, BUSY, SYNCOPATED, FILL, HALF-TIME, DOUBLE-TIME and PERC variations (OCT− backward, OCT+ forward).

MODE > HIRO SONG

Open MODE and turn SELECT to HIRO SONG. The HIRO SONG row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles the Chord Hiro songs (OCT− backward, OCT+ forward).

MODE > DIFFICULTY

Open MODE and turn SELECT to DIFFICULTY. The DIFFICULTY row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles the Chord Hiro timing difficulty (OCT− backward, OCT+ forward).

MODE > PRACTICE SPEED

Open MODE and turn SELECT to PRACTICE SPEED. The PRACTICE SPEED row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes practice speed by 10 percent within 50–100 percent (OCT− backward, OCT+ forward).

MODE > EAR LEVEL

Open MODE and turn SELECT to EAR LEVEL. The EAR LEVEL row is selected.

Do this	What happens
Press OCT− / Press OCT+	Cycles the Ear Trainer levels (OCT− backward, OCT+ forward).

MODE > RANDOMIZE PATTERN

Open MODE and turn SELECT to RANDOMIZE PATTERN. The RANDOMIZE PATTERN row is selected.

Do this	What happens
Press OCT− / Press OCT+	Randomizes arp pattern, rate, layering and strum timing without changing the chord sequence or asking for confirmation.

PRESETS > P1

Press SAVE and turn SELECT to P1. P1 shares its saved music with synth PROJECT A; the separate chord settings are affected by the preset-save fault.

Do this	What happens
Press OCT−	Does nothing on the selected preset row.
Press OCT+	Loads P1 immediately without a question or undo, replacing the active project and chord settings; an empty slot only reports EMPTY.

PRESETS > P2

Press SAVE and turn SELECT to P2. P2 shares its saved music with synth PROJECT B; the separate chord settings are affected by the preset-save fault.

Do this	What happens
Press OCT−	Does nothing on the selected preset row.
Press OCT+	Loads P2 immediately without a question or undo, replacing the active project and chord settings; an empty slot only reports EMPTY; saving P1 can leave this preset’s chord settings invalid, causing defaults on recall.

PRESETS > P3

Press SAVE and turn SELECT to P3. P3 shares its saved music with synth PROJECT C; the separate chord settings are affected by the preset-save fault.

Do this	What happens
Press OCT−	Does nothing on the selected preset row.
Press OCT+	Loads P3 immediately without a question or undo, replacing the active project and chord settings; an empty slot only reports EMPTY; saving P2 can leave this preset’s chord settings invalid, causing defaults on recall.

PRESETS > P4

Press SAVE and turn SELECT to P4. P4 shares its saved music with synth PROJECT D; the separate chord settings are affected by the preset-save fault.

Do this	What happens
Press OCT−	Does nothing on the selected preset row.
Press OCT+	Loads P4 immediately without a question or undo, replacing the active project and chord settings; an empty slot only reports EMPTY; saving P3 can leave this preset’s chord settings invalid, causing defaults on recall.

LOOPER > LAYER 1

Press SEQ and turn SELECT to LAYER 1. Selected event layer; its recordings exist in working memory only.

Do this	What happens
Press OCT−	Immediately clears layer 1’s recorded notes in working memory without a question, flash write or undo.
Press OCT+	Advances layer 1 through OFF, ARMED, REC, PLAY and OFF, discarding its recorded notes on PLAY to OFF without a question or undo.

LOOPER > LAYER 2

Press SEQ and turn SELECT to LAYER 2. Selected event layer; its recordings exist in working memory only.

Do this	What happens
Press OCT−	Immediately clears layer 2’s recorded notes in working memory without a question, flash write or undo.
Press OCT+	Advances layer 2 through OFF, ARMED, REC, PLAY and OFF, discarding its recorded notes on PLAY to OFF without a question or undo.

LOOPER > LAYER 3

Press SEQ and turn SELECT to LAYER 3. Selected event layer; its recordings exist in working memory only.

Do this	What happens
Press OCT−	Immediately clears layer 3’s recorded notes in working memory without a question, flash write or undo.
Press OCT+	Advances layer 3 through OFF, ARMED, REC, PLAY and OFF, discarding its recorded notes on PLAY to OFF without a question or undo.

LOOPER > LAYER 4

Press SEQ and turn SELECT to LAYER 4. Selected event layer; its recordings exist in working memory only.

Do this	What happens
Press OCT−	Immediately clears layer 4’s recorded notes in working memory without a question, flash write or undo.
Press OCT+	Advances layer 4 through OFF, ARMED, REC, PLAY and OFF, discarding its recorded notes on PLAY to OFF without a question or undo.

LOOPER > BARS

Press SEQ and turn SELECT to BARS. The BARS row is selected.

Do this	What happens
Press OCT− / Press OCT+	Changes the first loop’s length setting from FREE to 1–8 bars.

LOOPER > METRONOME

Press SEQ and turn SELECT to METRONOME. The METRONOME row is selected.

Do this	What happens
Press OCT− / Press OCT+	Toggles recording metronome clicks.

LOOPER > CLEAR ALL

Press SEQ and turn SELECT to CLEAR ALL. The CLEAR ALL row is selected.

Do this	What happens
Press OCT− / Press OCT+	Immediately clears all four looper recordings and stops their transport without a question, flash write or undo.

Shared slots and preset-save faults

P1 is PROJECT A, P2 is B, P3 is C and P4 is D. Saving from either interface replaces the same saved music; a synth PROJECT save leaves the separate chord settings unchanged. PRESETS shows the stored project’s name.

Saving P1 damages P2’s saved chord settings, P2 damages P3’s, and P3 damages P4’s, so loading the affected next preset can use default chord settings; there is no question or undo, and P4 also writes beyond its assigned working storage with effects that have not been established. The autosave packer has a related memory-write fault whose wider effects have not been established. Do not rely on these presets as a backup.

Save, record and back up

P1/A, P2/B, P3/C and P4/D share their saved music with synth PROJECT A–D, including key, scale and tempo but excluding keyboard octave, chord-sequence steps and looper recordings; their separate chord settings are unreliable because of the preset-save fault, and startup also replaces restored live chord settings with defaults.

A working v0.3 editor or backup route has not been established; the repository contains editor source, so record important settings and capture audio externally before switching rather than relying on Save backup or P1–P4.

If an editor is made operational and verified, its Restore backup asks once in the browser, then replaces included stored items, including empty slots, and loads the current synth project last without undo; interruption can leave a partial restore, and an older file without an FM6 bank leaves that bank unchanged.

Do not treat the looper’s recording indicator as proof that every note was kept: a layer silently drops later note events after its capacity is reached.

Looper capacity. Each layer holds up to 160 note-on or note-off events; once full, recording silently leaves later events out.

Looper lifetime. Chord looper recordings and chord sequencer steps live in working memory and are not part of P1–P4; record audio externally before switching off.

Leaving the chord sequencer. Changing mode while the chord sequence runs records one pass into a looper layer only when no loop exists and the current live layer is off; otherwise the sequence stops.

Arming and finishing a loop. The first recording starts on the second short REC press, finishes on the next press in FREE length or after the chosen bar count, and later armed layers start at the loop boundary; playback moves the live instrument to the lowest unused layer.

Speaker save. Changing SPEAKER alone does not trigger chord-state autosave; a separate settings save, such as leaving the hidden synth menu, is needed to keep it.

Recalled output level. OUT LEVEL is not reliably saved or recalled because its value falls outside the chord-settings block; choosing its row applies the output reduction, while preset recall does not apply that reduction.

MIDI input switch. MIDI IN changes the displayed choice but does not disable incoming MIDI notes, and its value lies outside the saved chord-settings block, so recall is unreliable.

OCT+ in the envelope or vibrato list. OCT+ unexpectedly loads P1 while the ENV or LFO list is open, replacing the active project and chord settings without a question or undo; use SELECT to choose within these lists.

What stopped means for flash writes. The save guard waits for the hidden synth transport and song order, but does not check the chord sequencer or chord looper; flash erases can briefly silence audio while those run.

Autosave memory fault. The same chord-settings packer overruns its temporary working storage during autosave; the wider effects of this memory fault have not been established.

Use the hidden synth

Hold HOME for more than 0.7 seconds. Its menu, sequencer, sound-saving and shortcut controls follow; hold HOME and press SAVE to return to the chord interface. A synth project does not contain the separate chord sequencer or chord looper recordings.

Hidden synth: common controls

Hold HOME on the chord interface to enter the synth interface. Common behavior on ordinary synth pages; menu, naming, confirmation and held-button layers override these controls.

Do this	What happens
Turn SELECT	Changes the tempo from 40 to 240 BPM.
Release SEL	Opens the last SCL page visited, or advances through that family when it is already open.
Hold SEL	Opens the SCL SET shortcut map after the menu’s 0.3 to 0.6 second hold time, saving its first-use hint state without a question once stopped.
Release FX	Opens the last FX page visited, or advances through that family when it is already open.
Hold FX	Opens the FX HOLD shortcut map after the menu’s 0.3 to 0.6 second hold time, saving its first-use hint state without a question once stopped.
Release GLO	Opens MIXER, then cycles through GLOBAL and SYSTEM on further taps.
Hold GLO	Opens the GLO SET shortcut map after the menu’s 0.3 to 0.6 second hold time, saving its first-use hint state without a question once stopped.
Release EDIT	Opens the last EDIT page visited, or advances through that family when it is already open.
Hold EDIT	Opens the EDIT SET shortcut map after the menu’s 0.3 to 0.6 second hold time, saving its first-use hint state without a question once stopped.
Release ENV	Opens the last ENV page visited, or advances through that family when it is already open.
Release LFO	Opens the last LFO page visited, or advances through that family when it is already open.
Release ARP	Opens the last ARP page visited, or advances through that family when it is already open.
Release SEQ	Opens or advances through STEP, PATTERN, PHRASES, SONG, CHANCE and MOTION.
Hold SEQ	Opens SONG after holding for 0.7 seconds.
Release HOME	Returns to the synth HOME page after a short tap.
Hold HOME	Opens or closes the synth menu after holding for 0.7 seconds.
Hold HOME, press SAVE	Returns to the chord interface.
Release SAVE	Opens USER for saving a sound, then cycles through the save pages on further taps.
Hold SAVE	After 0.7 seconds, swaps the last sound or phrase load with its undo copy, preserving later edits outside that load and leaving saved slots unchanged.
Turn ALGORITHM	Selects track 1 to 4.
Turn PRESETS	Does nothing on synth pages other than HOME and PRESETS, where it browses sounds.
Press OCT−	Moves the keyboard down one octave within three octaves of its starting range.
Press OCT− + OCT+	Returns the keyboard octave shift to zero.
Press OCT+	Moves the keyboard up one octave within three octaves of its starting range.
Release REC	Arms or disarms live recording for the selected track and starts playback when armed while stopped, without saving to flash.
Press PLAY/STOP	Starts the patterns or stops playback, using the song order when SONG is open.
Press F3 / Press G3 / Press A3 / Press B3 / Press C4 / Press D4 / Press E4 / Press F4 / Press G4 / Press A4 / Press B4 / Press C5 / Press D5 / Press E5 / Press F5 / Press G5 / Press C#4 / Press D#4 / Press F#4 / Press G#4 / Press A#4 / Press C#5 / Press D#5 / Press F#5 / Press F#3 / Press G#3 / Press A#3	Plays the selected track through its octave, scale and engine key mapping; CHRD HI uses the chord-machine key roles instead.
Release F3 / Release G3 / Release A3 / Release B3 / Release C4 / Release D4 / Release E4 / Release F4 / Release G4 / Release A4 / Release B4 / Release C5 / Release D5 / Release E5 / Release F5 / Release G5 / Release C#4 / Release D#4 / Release F#4 / Release G#4 / Release A#4 / Release C#5 / Release D#5 / Release F#5 / Release F#3 / Release G#3 / Release A#3	With CHRD HI off, releases this key’s note on its original track; with HI on, uses the selected chord-mode release behavior, including releasing a black-key direction rather than a note.

Synth NAME editor

Choose a save action, or tap EDIT on USER or PROJECT. A twelve-character name editor; white keys type and black keys edit, with no sounding notes.

Do this	What happens
Turn SELECT / Press SEL / Press FX / Press GLO / Press EDIT / Press ENV / Press LFO / Press ARP / Press SEQ / Press SAVE / Turn ALGORITHM / Turn PRESETS / Turn KNOB 3 / Turn KNOB 4 / Press REC	Does nothing while naming.
Screen	Shows the slot, twelve-character name field, typing groups and editing shortcuts.
Turn KNOB 1	Moves the naming cursor.
Turn KNOB 2	Cycles the character at the cursor or adds one at the end.
Release OCT−	Closes naming without writing anything.
Press PLAY/STOP	Stops playback if it was started elsewhere while naming, and never starts it here.
Press F3	Types or cycles AB in letter mode, or types 1 in number mode; repeated taps within 0.8 seconds cycle the group.
Press G3	Types or cycles CD in letter mode, or types 2 in number mode; repeated taps within 0.8 seconds cycle the group.
Press A3	Types or cycles EF in letter mode, or types 3 in number mode; repeated taps within 0.8 seconds cycle the group.
Press B3	Types or cycles GH in letter mode, or types 4 in number mode; repeated taps within 0.8 seconds cycle the group.
Press C4	Types or cycles IJK in letter mode, or types 5 in number mode; repeated taps within 0.8 seconds cycle the group.
Press D4	Types or cycles LM in letter mode, or types 6 in number mode; repeated taps within 0.8 seconds cycle the group.
Press E4	Types or cycles NO in letter mode, or types 7 in number mode; repeated taps within 0.8 seconds cycle the group.
Press F4	Types or cycles PQ in letter mode, or types 8 in number mode; repeated taps within 0.8 seconds cycle the group.
Press G4	Types or cycles RS in letter mode, or types 9 in number mode; repeated taps within 0.8 seconds cycle the group.
Press A4	Types or cycles TU in letter mode, or types 0 in number mode; repeated taps within 0.8 seconds cycle the group.
Press B4	Types or cycles VW in letter mode, or types - in number mode; repeated taps within 0.8 seconds cycle the group.
Press C5	Types or cycles XYZ in letter mode, or types . in number mode; repeated taps within 0.8 seconds cycle the group.
Press D5	Types or cycles 123 in letter mode, or types _ in number mode; repeated taps within 0.8 seconds cycle the group.
Press E5	Types or cycles 456 in letter mode, or types / in number mode; repeated taps within 0.8 seconds cycle the group.
Press F5	Types or cycles 789 in letter mode, or types # in number mode; repeated taps within 0.8 seconds cycle the group.
Press G5	Cycles 0, hyphen and period in letter mode, or types + in number mode.
Press C#4 / Press C#5	Deletes the character before the cursor.
Hold C#4 / Hold F#4 / Hold A#4 / Hold C#5 / Hold F#5 / Hold F#3 / Hold A#3	Repeats this naming edit after 0.45 seconds, then every 0.09 seconds.
Press D#4 / Press D#5	Switches between letter and number typing.
Press F#4 / Press F#5 / Press F#3	Moves the naming cursor left.
Press G#4 / Press G#3	Inserts a space.
Press A#4 / Press A#3	Moves the naming cursor right.