KEYBOARD SHORTCUTS
Z S X D C V G B H N J M — Play notes C through B (lower octave)
Q 2 W 3 E R 5 T 6 Y 7 U — Play notes C through B (upper octave)
Arrow Keys — Navigate the grid (up / down / left / right)
Delete / Backspace — Clear selected cell
Space — Play / Stop
HOW TO USE
1. Select an instrument from the left panel (click to select, triangle to preview)
2. Click a cell in the tracker grid to select it
3. Press a note key (Z-M or Q-U) to place a note — it auto-advances down
4. Each column is a channel — use all 8 for layered tracks
5. Hit Space or the Play button to hear your pattern
6. Adjust BPM (tempo) and SPD (speed) in the top bar
7. Change OCT to shift which octave your keyboard plays in
THE GRID
Each cell shows: NOTE INST VOL FX
Example: C-4 01 40 means note C octave 4, instrument 01, volume 40 hex
Row numbers are in hexadecimal (00-1F = rows 0-31)
Blue highlighted rows mark beat divisions (every 4 rows)
FIZMOLOGY (EFFECTS)
Filter — Shape frequencies. Lowpass cuts highs, highpass cuts lows. Resonance adds emphasis at the cutoff point.
ADSR Envelope — Controls how notes evolve over time. Attack = fade in speed. Decay = drop to sustain level. Sustain = held volume. Release = fade out.
Distortion — Adds grit, overdrive, and harmonic saturation
Delay — Echo effect. Time = gap between echoes. Feedback = number of repeats.
Reverb — Simulates room ambience and space
Bitcrusher — Reduces bit depth for lo-fi retro sound. Lower = more crushed.
Pan — Stereo position. L = left, C = centre, R = right.
CHANNELS
Click channel headers to select. Click the o to mute/unmute a channel.
Each channel plays independently — layer drums, bass, leads and pads across all 8.
PATTERNS
Each pattern has 32 rows. Use + and - at the bottom to add/remove patterns.
The pattern order bar shows the playback sequence — click to jump between patterns.
PAT button plays just the current pattern. PLAY plays through the full order.
INSTRUMENTS
35 instruments across 5 categories, all procedurally synthesised:
DRUMS (15) — Kick, Snare, Hi-Hats, Clap, Rim, Toms, Crash, Ride, 808s, Trap Hat, Cowbell
BASS (5) — Sub Bass, Acid 303, Pluck, FM Bass, Reese Bass
LEAD (6) — Square, Saw, FM Bell, Sync, Chip, Detuned Saw
PAD (5) — Warm, Dark, Strings, Shimmer, Ambient Drone
FX (4) — Noise Sweep, Riser, Laser, Zap
SAVING & LOADING
SAVE stores your track in the browser (up to 20 slots). LOAD retrieves previous tracks.
EXPORT will render your track as a WAV file (coming soon).
SYNTH TRACKER // SYNTH-TUBE // BUILT BY KATELYN AND BEN FOR LEO