2fb00f20a9
Hand tracking at 30fps was writing 126 params per frame to the C15 ring buffer (capacity 512), flooding it and starving arpeggiator noteOn/noteOff messages — causing stuck/dropped notes. Three-part fix: - Arpeggiator now runs in a dedicated Web Worker with direct SharedArrayBuffer access, bypassing the main thread entirely for note timing. Worker setInterval isn't subject to main thread jank. - RingBufferWriter uses CAS (Atomics.compareExchange) for multi-producer safety — both main thread (params) and worker (notes) write safely. - routeOutputs throttles synth parameter sends: dead-zone filter (0.2% change threshold) + rate cap (~20fps), reducing ring buffer pressure from ~3800 msg/s to ~50-100 msg/s of actual changes. |
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|---|---|---|
| .. | ||
| c15 | ||
| css | ||
| devlog | ||
| js | ||
| wasm | ||
| a-immersive.html | ||
| b-workbench.html | ||
| c-journey.html | ||
| designs.html | ||
| index.html | ||
| README.md | ||
| serve-coop.py | ||
| serve.sh | ||
| SPEC-shapeseq.md | ||
| TODOS.md | ||
NISPS Playground
Browser-based interactive demo of the NISPS ML engine.
Run locally
python3 -m http.server
# Open http://localhost:8000
Run the command from the playground/ directory.
What it does
- Maps 2D joystick input (X/Y) through an MLP (
[3, 32, 48, 64, 126]) to 126 outputs. - Visual mode: first 20 outputs drive a flow-field particle visualization on Canvas2D.
- Synth mode (C15): all 126 outputs control the C15 WASM synthesizer — envelopes, oscillators, shapers, filters, feedback/output mixers, cabinet, and effects.
- Supports two learning modes:
- Examples: add explicit input/output pairs and train.
- RL Feedback: give thumbs up/down while exploring outputs.
C15 synth parameters
The 126 synth parameters (js/synth/param-map.js) cover all sonically meaningful continuous parameters of the C15 engine. Excluded from the C15's 287 total params:
- Hardware routing (56) — no physical MIDI in browser
- Macro controls (12) — conflicts with direct ML control
- Scale/tuning (13) — would break pitch
- Key tracking / velocity (22) — depend on note context ML can't observe
- Envelope mod depths (19) — too many multiplicative interactions for 2-input ML
- Discrete/structural/dangerous (19) — pitch sweep, volume, switches, resets
- Secondary config (15) — curves, chirp, shaper blend, source selects
UI controls
- Output mode tabs (side panel): switch between Visual and Synth modes.
- Expand / Collapse button on the canvas: makes the visual surface nearly full-screen and compresses lower controls into a minimal view.
- Presets: quick demo mappings (
Calm/Chaos,Rainbow,Vortex) — visual mode only. - Help (
?) overlay: in-app usage guide. - Follow mode: double-click joystick in RL mode to toggle no-hold interaction.
- Keyboard in Follow mode (RL):
2= thumbs up,1= thumbs down. - Gamepad in RL:
RB= thumbs up,LB= thumbs down.
Files
index.html- page structure.css/style.css- layout and visual styling.js/app.js- app wiring and interaction logic.js/ui/- visualizer, joystick, controls, parameter display.js/nisps/- JavaScript MLP + IML core.js/synth/- C15 WASM bridge, parameter map, arpeggiator.c15/- C15 engine WASM binary and parameter definitions.