Browser-based game-music sketchpad. Pick a genre, get a full arrangement (melody, chords, bass, arpeggio, pad, drums), tweak it, export WAV/MIDI. Single HTML file, Web Audio API, no build step, no dependencies, no samples — every instrument is synthesized.

Inspired by "Score Forge" from this r/aigamedev post.

Open index.html in Chrome/Edge/Firefox. That's it.

• 8 genres × 3 styles — Synthwave, Sci-fi, Postapo, Drama, Epic, Fantasy, Hip-hop, Ambient. Each style sets key, tempo, progression, instruments, drum pattern.
• 6 tracks with density (Off / Soft / Normal / Busy), instrument, octave shift, volume, mute/solo. 28 synth patches + 6 synthesized drum kits, reverb/delay sends, compressor + limiter.
• Global: tempo, swing, bars (4/8/16), key (auto or any root/mode — changing it transposes notes).
• Sections + song: create/duplicate/delete/rename sections, drag to reorder the arrangement, loop one section or play the whole song.
• Piano roll: click to add, drag to lengthen, click/right-click to delete. Scale and chord tones are tinted. Per-bar chord picker (re-voices backing), copy/paste/clear bar.
• Generators: New melody (motif with call & answer, cadence on tonic), New chords, New beat, Build backing.
• Keyboard: computer keys Z S X D C… (lower octave) and Q 2 W 3 E… (upper), chord/scale highlighting and "nice next notes" hints. Record live at the playhead or step-input when stopped.
• Export: Song → WAV, Section loop → WAV (seamless, renders two passes and keeps the second so reverb tails wrap — loops cleanly in a game engine), Song → MIDI, project save/load as JSON.
• Space = play/pause, Ctrl+Z = undo, autosave to localStorage.

sfxr-style sound-effect generator, but layered (up to 4 layers per sound, e.g. noise burst + sub drop for an explosion). Rendered offline, so what you hear is exactly what gets exported.

• 16 categories: Pickup, Coin/Gem, Laser, Explosion, Hit/Hurt, Jump, Blip/UI, Footstep, Swoosh, Powerup, Magic/Heal, Death, Alarm, Creature growl, Critter chirp, DNA splice. Each click = new random take.
• Per layer: wave (square/saw/triangle/sine/white/pink/brown noise), level, start delay, attack/sustain/punch/decay, frequency + slide (amount & curve), pitch jump (arpeggio), repeat, vibrato, FM (ratio/depth), lowpass sweep + resonance, highpass.
• Output: volume, drive, bitcrush, downsample, reverb, echo. Auto-normalized, silence trimmed.
• Mutate (bigger change), Totally random, Variations (N subtle versions — footsteps, hits) with batch WAV export. History of every take; save/load sounds as JSON.
• Export: mono 16-bit 44.1 kHz WAV.