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performing-orthonotone-polychoral-instrument

Guides agents through launching, playing, sculpting, and capturing performances with the Orthonotone polychoral instrument MVP. Use when generating music, soundscapes, or live demos from this repository.

personAuthor: jakexiaohubgithub
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Performing Orthonotone Polychoral Instrument

Contents

Stage setup

  1. Serve the project – run any static server from the repo root (npx http-server . is sufficient) and open polychoral-instrument-mvp.html in a Chromium-based browser for best WebAudio timing.
  2. Prime Playwright harness (optional) – npm install once, then npm run check to ensure the QA hooks remain healthy before and after your session.
  3. Warm the audio graph – click Enable Audio in either the toolbar or System section of the Controls panel. Browsers insist on a user gesture before sound.
  4. Set your monitoring level – adjust Master Volume immediately; presets and snapshots respect the level currently set.

Performance quickstart

  • Canvas focus – keep the canvas in view (toggle Focus Mode if panels crowd the stage). The hypercube visualization reacts to the same modulation that drives the synth.
  • Baseline scene – start from Neutral Lattice or Prismatic Bloom in Quick Scene to align with the sound you want. Custom tweaks always begin from the current selection.
  • Check system status – expand the Live State Vectors panel for meters showing axis energy, edge resonance, and face harmonic bloom. Use these readouts to balance the mix while improvising.
  • Keep audio alive – if silence returns after inactivity, tap Enable Audio again; the button mirrors the AudioContext state.

Control surface map

State Space

  • Quick Scene selector: instant morph targets (Neutral, Drift, Bloom, Pulse).
  • Snapshots: name and store mixes for instant recall mid-set.
  • Dimension / Morph / Grid / Fidelity sliders: reshape the rendered hyper lattice and corresponding harmonic density.

Timbre Architecture

  • Line Thickness, Shell Width, Tetra Density: sculpt the visual-acoustic shell; thicker values emphasize lower resonances.
  • Color Shift & Glitch Intensity: paint spectral hue and sprinkle jittered overtones.

Rotation Velocities

  • Six sliders (XY…ZW) drive base angular speed in radians/sec. Pair them with gestures for evolving drones versus rhythmic pulses.

System Suite

  • Master Volume controls output gain post-fader.
  • Enable Audio toggles the synth graph.
  • Symmetry Snap recenters rotation for crystalline chords.
  • Reset State returns sliders to defaults while leaving audio on.
  • Freeze Rotation halts motion for sustained pads.
  • MIDI Bridge connects controllers, enabling external modulation.
  • Tempo Sync buttons follow external MIDI clock or rephase the internal clock.

Gestural choreography

  • Pointer drags: default drags modulate XY/YZ/XZ; hold Shift for XW/YW, Alt for XZ/ZW, Ctrl / ⌘ for fine isoclinic blends.
  • Touchscreens: second finger emulates Shift, third finger unlocks Alt; no hardware keyboard required.
  • Motion input (beta): enable via Gesture panel for accelerometer blending; calibrate neutral tilt before performing.
  • Focus Mode & Hide Panels: reclaim screen real estate mid-performance without losing panel state.

Scene design and snapshots

  1. Choose or sculpt a starting scene via Quick Scene.
  2. Dial lattice parameters (Dimension/Morph/Grid/Fidelity) to set harmonic density.
  3. Shape timbre with Shell/Line/Tetra and Color/Glitch controls.
  4. Balance rotation speeds so Status panel meters pulse in complementary patterns (e.g., pair XY with XZ for shimmering fifths).
  5. Store the state: enter a descriptive name and click Save Snapshot; it appears in the snapshot list for one-click recall.
  6. Annotate experiments – log notable parameter sets in audio-upgrade-turn2-core-dsp.md or related plan docs so future performers can reproduce them.

Tempo and groove engine

  • Clock Division & Rhythm Pattern choose internal sequencer grids (Quarter, Eighth, Triplet, Sixteenth; Drive Pulse, Syncopated Lift, Euclidean Five, Ambient Bloom, Custom Sculpt).
  • Groove Swing introduces humanized delay; values above 0.3 create loping polyrhythms.
  • Pattern Sculptor appears when Custom Sculpt is selected—paint per-step intensities, use Euclidise for evenly spaced hits, Humanise for slight randomness, or Clear to reset.
  • MIDI Clock Follow syncs modulation to external gear; monitor Tempo Sync and Clock Phase in the Status panel to verify lock.

Recording and sharing takes

  1. Screen capture – use system-level screen/audio recorder (e.g., QuickTime, OBS) to capture both visuals and sound; ensure desktop audio is routed from the browser.
  2. Snapshot setlists – before recording, queue snapshots in performance order for rapid transitions.
  3. Document presets – after recording, export slider values by copying the QA report (Status → QA Diagnostics → Copy Report) to archive performance settings.
  4. Share context – attach relevant plan doc links or commit hashes when distributing audio/video so collaborators can align with the build you used.

Troubleshooting cues

  • No sound after enabling: confirm Master Volume > 0 and the Status panel shows AudioContext "Running". Reload the page if the context gets stuck in "Suspended".
  • Gestures feel unresponsive: check if Freeze Rotation is active, or if axis sliders are pegged at zero. Recenter with Reset State.
  • Panel clutter: toggle Hide Panels then reopen only what you need; Focus Mode hides panels but keeps toggles docked.
  • MIDI not detected: ensure browser permissions allow MIDI, press Connect MIDI again, and verify device appears in the dropdown.

Reference atlas