Manual

1 · Layout

• Recorder bar (top) — bounces the sound engine's master output to a WAV file (see Audio bounce).
• Top bar — transport (play Space / pause Bksp / record Ent / settings Esc), tempo & metronome, and the four mode tabs: PTRN 9 STEP 0 KEYB - CTRL =. Holding a tab (or its key) switches to it only momentarily — make a change and release, and you snap back to where you were. A quick tap with no change switches permanently.
• Parts row — 8 parts, each showing its instrument name and loop length. Tapping a part selects it and triggers its sound the moment you press (in STEP / KEYB / CTRL; with REC armed the hit is also recorded). Hold SELECT to select a part silently. The grid, display and CTRL panel always show the active part; a red dot marks a part that has drifted out of sync.
• Step grid — 16 pads per page, up to 64 steps (pages Z X C V). Its meaning changes per tab (steps, pattern slots, keyboard, settings pages).
• Virtual display — shows the playing Bank · Pattern and a grid of value cells. Adjust any cell by dragging or the scroll wheel; double-click / double-tap resets it. Cells can also be driven by incoming MIDI CC, or from the keyboard: , / . move the cell selection, ; / L raise / lower the selected value.
• Buttons row (below the grid and status) — the four hold modifiers MUTE Shift · SOLO Ctrl · ALIGN ` · SELECT \, plus the four action buttons (O P [ ]) whose labels and function change per tab.
• Hold modifiers — hold and tap parts: MUTE mutes, SOLO solos, ALIGN re-syncs a part to the bar, SELECT selects without triggering. A quick tap of ALIGN alone aligns the active part. Combos: MUTE+ALIGN clears all mutes, SOLO+ALIGN clears all solos, MUTE+SELECT clears the active part's step skips.
• Latching a modifier — slide a modifier button downwards to keep it engaged hands-free (it turns yellow). Repeat the slide, tap the button, or tap empty space to release. Handy for one-handed muting or holding SOLO open on the MIDI-delay page.
• Sound panel (bottom) — the expandable sound editor for the active part, with an ALL MUTE button in its header.
• Status bar — every action is confirmed here. Read it when unsure.

2 · Transport, Tempo & Recording Arm

• Play (Space) starts the sequencer; pressing it again stops and resets every part to the start. Queued events (pattern changes) land on bar downbeats.
• Pause (Backspace) pauses in place and resumes from exactly where playback left off.
• REC (Enter) arms live recording: part hits and notes played in KEYB mode, and knob moves in CTRL mode, are written into the running sequence as steps and step locks. Live-recorded hits are quantised to the nearest step.
• Tempo — drag the tempo readout left/right (or scroll) to change BPM; on desktop, hold N and nudge with ; (up) / l (down), Shift for ±10. The metronome button (M) toggles a click with a bar accent.
• Settings (gear, Esc) opens SETTINGS mode (see section 8).

3 · STEP tab

• Tap a pad to place or remove a step. Q–I and A–K mirror the 16 pads. A removed step remembers its settings and restores them when re-placed; hold ALIGN while placing to force the part's step defaults instead. Placing a step beyond the loop end automatically extends the loop to the end of that page.
• Hold a pad — the display switches to that step's own page (STEP n — PART n): NOTE · ACCENT · GATE · PROB · OCT · VELOCITY · TIME OFST · RETRIG. Drag the cells to shape just that step (probability, micro-timing, ratchets…). The NOTE cell loops across octaves — dragging past B wraps to C and bumps OCT.
• Latch a step — hold a pad from 1–8 and slide up, or a pad from 9–16 and slide down, to keep it selected after you release, so you can adjust its parameters and cycles hands-free. Repeat the slide on the same pad, tap it again, or tap empty space to release.
• Step cycles — while a pad is held (or latched), the four page buttons become cycle toggles 1–4: choose on which repetitions of a 4-cycle loop the step sounds (e.g. only every 4th pass). A small corner notch marks cycle-restricted steps.
• Step skip — hold MUTE and tap a pad (or Shift+step key): the playhead jumps over that step entirely, shortening the loop's feel. Skipped pads turn grey; skips override the SEQ STRT/END window (those cells dim). MUTE+SELECT (or Shift+\) clears all skips on the part.
• Page duplicate / expand — hold MUTE and tap a page button to copy the filled pages into a longer loop: page 2 copies 1→2; page 3 copies 1→3 (filling 2 as well if it's empty); page 4 fills 2/3/4 from what exists (1→2,3,4; or 3=1, 4=2; or 4=2). The loop end extends to cover the copies. Steps, parameters, skips and cycles are all copied.
• A dot on a pad means the step carries step locks (see CTRL). A red dot means those locks are currently muted.

On the display — SEQUENCER PART

The display shows SEQUENCER PART N: eight cells shaping the active part's timing and pitch. All are draggable / scrollable, double-tap resets:

• SEQ STRT / SEQ END — the part's loop window (1–64 steps; also draggable on the range bar). They dim when step-skips override them.
• SEQ DIR — playback direction. SPEED — per-part speed multiplier (polyrhythms).
• TRANSP — transposes every note in the part, and its note default by the same amount, so steps you place afterwards follow the transpose. One drag notch or wheel click = ±1 octave; hold MUTE for ±1 semitone. Double-tap returns it to 0.
• SEQ OFST — rotates the sequence; the grid shows the shifted result. SWING — off-beat shuffle.
• MIDI DLY — note-echo amount.

MIDI DELAY page — hold SOLO

Hold (or latch) SOLO in the STEP tab and the display becomes the MIDI DELAY page for the part: DLY TIME (echo division) · DLY FB (feedback) · PITCH FB (±12 st per echo — pitched delays that spiral up or down) · MIDI DLY. Release SOLO to return. Latch SOLO to keep the page open and adjust it hands-free.

Holding a step pad switches the display to that step's own parameters; holding a part button shows the part's PART DEFAULTS — the values every new step is seeded with: NOTE · ACCENT · GATE · PROB · OCT · VELOCITY · TIME OFST · RETRIG (NOTE loops across octaves). Set a default probability or retrig here and new steps inherit it.

Action buttons

4 · PTRN tab — banks, patterns & looper

• 8 banks × 64 patterns. The parts row becomes the bank picker; the grid shows that bank's pattern slots (lit = has data).
• Tap a slot — stopped: loads immediately. Playing: queues the change for the next bar downbeat (slot blinks, status confirms). The display always shows what is actually playing, while you browse freely.
• Which is which: a blinking dot always marks the pattern that is playing; a box marks the one you have selected. The playing pattern — and the bank that holds it — always show in yellow; any other selected pattern or browsed bank shows in red.
• Cued editing — hold SELECT and tap a slot to select without loading. In the STEP tab that selected pattern is now editable while a different one keeps playing — there is no playhead on it, and the display's Bank · Pattern turns red to show it is not the one playing. Your edits save to the selected pattern and leave the playing one untouched.
• LOOP 1/4 · 1/8 · 1/16 · 1/32 — hold an action button to loop the playing material at that length; release to resume exactly where playback would have been. Loops can be layered: with several held, the most recent one sets the rate, and releasing it falls back to the previous.
• A pattern change made while looping waits in the background — the loop is untouched; on release the new pattern enters on the next bar.

On the display — VELOCITY MIXER

• The display becomes a velocity mixer: one cell per part (0–100%) scaling that part's output level/velocity — a quick performance mixer while switching patterns. With the drum machine active each fader is labeled with that part's instrument. Drag, scroll or drive it with incoming CC.
• The header always shows the Bank · Pattern that is playing, independent of what you are browsing.

5 · KEYB tab

• The grid becomes a playable keyboard for the active part; the first two page buttons shift the octave, the other two shift the key window.
• Virtual display — KEYBOARD: VELOCITY · SCALE · ARP · RATE · OCTAVE · ROOT · RANGE · GATE. Scale and root lock the keys to a scale; the ARP cells configure the arpeggiator (mode, rate division, octave range, gate — RATE/RANGE/GATE dim while ARP is off). ROOT loops around the twelve notes without changing octave. Each cell has its own assignable input-CC number.
• ROLL 1/4 · 1/8 · 1/16 · 1/32 — hold an action button while holding notes to repeat them at that division.
• With REC armed and the transport running, played notes are written into the sequence at the current position. With the transport stopped, the arpeggiator free-runs while keys are held and re-syncs on play.

6 · CTRL tab — parameters & locks

• On the display: 8 parameter cells for the active part. With the internal drum machine this is SOUND CTRL — the part's sound parameters, always starting with VOL · PAN · REV SND · DLY SND plus attack, decay and type-specific cells. In MIDI mode it's MIDI CTRL — 8 assignable CCs sent to the part's output (CC numbers editable here or in Settings).
• Each cell has a global value — drag it any time; this is the value that plays wherever no lock exists.
• Step lock: hold a step pad — the display retitles to LOCK — STEP N and the cells now show that step's values — then drag a cell: that value plays only on that step; the next unlocked step snaps back to the global value. Locked cells are highlighted; double-click a held cell to remove its lock. A held step can be latched (slide up on 1–8 / down on 9–16) to edit its locks hands-free.
• Quick tap a step pad in CTRL to jump to the STEP tab and toggle that step there — no need to switch tabs first.
• With REC armed, turning cells while playing records locks as automation.

Part setup & sound types (drum machine)

• Hold a part button in CTRL (with the drum machine active) to open its PART SETUP panel: scrub TYPE through the nine engine voices, set VOICE to MONO or POLY, and — when TYPE is SAMPLE — tap the SAMPLE cell to load your own audio file. On touch the panel latches open for one-handed use; tap the part again to close it.
• The types: KICK · SNARE · TOM · PERC · CLAP · HH (classic analog-style drum voices with pitch, decay and tone), FM (FM percussion/melodic voice), CHRD (a 3-oscillator chord voice with detune spread) and SMPL (load your own audio, with playback speed and a crusher).
• Each type brings its own parameter set to the CTRL cells — so what you lock per step depends on the sound type.

FX hold panels

• Hold MUTE in the CTRL tab → MASTER FX — DIST + EQ: DIST (tap OFF/ON) · VOL · GAIN · CHAR, and EQ (tap OFF / PRE / POST drive) · LO · MID · HI bands.
• Hold SOLO → SEND FX — RVRB + DLY: RVRB (tap through HALL / ROOM / PLATE / SPRING) · DECAY · DAMP · RTRN, and DLY (ANALOG / DIGITAL / TAPE / PING-PONG) · TIME · FDBK · RTRN.
• These hold panels behave like every other cell: drag, scroll-wheel, double-click to reset — and incoming MIDI CC edits them too while the panel is held open.

Action buttons

Lock mutes and hold are live performance states — they are never saved with patterns.

7 · Sound engine & FX

• In SETTINGS, the SELECT button becomes the mode toggle: DRUM MACHINE (internal sound engine on; parts named after their instrument) or MIDI CONTROLLER (engine off, parts named PART 1–8; MIDI out still works).
• Each internal part has a sound editor (bottom panel — click to expand): voice type and mono/poly, volume, pan, tune, attack, decay, tone, extra oscillator tunings for CHRD, sample loading, and reverb/delay sends. Its header carries an ALL MUTE button. Type and voice are also reachable from the PART SETUP panel (hold a part button in CTRL).
• Master FX — a distortion stage (volume, gain, character) with an independent 3-band EQ that can sit pre or post drive, plus a send reverb (four algorithms, decay, damping, return) and a send delay (four algorithms, time, feedback, return). All of them are hands-on from the CTRL tab via the MUTE / SOLO hold panels. Combined with PITCH FB on the MIDI-delay page, note echoes can spiral up or down in pitch.

8 · Settings & MIDI

• The gear button (Esc) opens SETTINGS mode. The grid becomes settings pages — page 1: MIDI IN, page 2: CC IN, page 9: MIDI OUT, page 10: CTRL CC OUT — and the buttons row is repurposed: ABOUT · DONATE · MANUAL links, the DRUM MACHINE / MIDI CONTROLLER toggle, and the file buttons (section 10).
• MIDI IN / MIDI OUT pages — pick the global device and channel. Tap a part to set a per-part override (device and channel, or inherit global). The global output channel can be Auto: each part sends on its own channel 1–8.
• CC IN page — the 8 MIDI CC numbers that drive the display cells in every mode (double-click a cell for the factory number). CTRL CC OUT page — per part, the 8 CC numbers the CTRL tab sends in MIDI mode.
• Incoming CC is mapped to whatever the display currently shows — the sequencer cells in STEP, the MIDI-delay page under SOLO, the CTRL cells in CTRL, the keyboard/arp cells in KEYB, the velocity mixer in PTRN, even the held FX panels.
• Audio rate — the top-right of the display shows the current audio sample rate. If it turns red and reads low (typically a Bluetooth headset that opened the audio in hands-free mode), the sound loses its top end and the hi-hat can go quiet. Reconnect the device or reload; the app also re-opens the audio at full rate when it can.
• Notes, echoes and CTRL CCs are sent per part over the part's output routing.

9 · Audio bounce

• The recorder bar captures the master output — all parts, panning, sends and master FX; the metronome click is excluded. BOUNCE while playing arms and starts on the next bar; pressing STOP lets the bar finish first — takes are exact whole bars, ready to loop. Press stop twice to cut immediately.
• From a stopped transport, BOUNCE starts playback and captures from the very first step.
• SAVE WAV names and exports the take: a small dialog lets you type a filename first (16-bit stereo WAV). On iPhone/iPad it offers Save to Files / share. PREVIEW auditions the take first, no save needed.

10 · Projects & saving

• In SETTINGS, the four action buttons become: FILE SAVE O — opens a dialog to name the file, then exports the whole project (all banks, patterns, sounds, settings); FILE LOAD P imports one; FILE NEW [ resets everything. On iPhone/iPad, FILE SAVE offers Save to Files / share.
• Patterns always save themselves — every edit (steps and knob moves alike) is committed back to the pattern's slot automatically. There is no save button for patterns; use PTRN COPY (hold) only to copy a pattern to other slots.
• AUTO-SAVE ] (on by default) additionally keeps the whole project persisted in the browser, so it survives a reload. Turning it off clears the stored data.

11 · Install & offline

• Install it — add the app to your home screen (your browser's Add to Home Screen, or the Install prompt in Chrome/Edge) to run it fullscreen, with no address bar, and scaled to fit the screen with no scrolling.
• Works offline — once installed it runs with no connection. It updates only when a new version is published: you'll see a small Update ready chip on launch — tap it to switch to the new version.
• iPhone / iPad silent switch — the ring/silent switch mutes Web Audio. If you hear nothing after pressing play, take the phone out of Silent Mode (the app reminds you the first time).
• Installed on iOS the app keeps its own storage, separate from the browser tab, so a project saved in one is not visible in the other.

12 · Keyboard quick reference

On desktop, the small key hints under each button always show the current mapping.