Orthonotone

Orthonotone builds Extruments—expressive instruments that grow out of geometric logic rather than traditional lutherie. The flagship Extrument is the Othonoquarturnica, a rotating polytope interface whose four great circles map motion to shimmering harmonic fields. This branch contains the current public prototype and the documentation required to keep it deployable from the repository root.

What is an Extrument?

An Extrument treats mathematical structure as the chassis for musical performance. Instead of strings or keys, players navigate within a spatial graph—the faces, edges, and axes of a high-dimensional polytope. Movement along those manifolds drives synthesis, lighting, and collaborative cues. The goal is not to mimic acoustic tools, but to invite players into a responsive, spatial conversation with mathematics.

How the Othonoquarturnica Works Today

The MVP routes cursor or single-touch gestures into two primary rotation planes. Each plane powers a layered oscillator bank with filtering and stereo motion, so orbiting the shape sculpts timbre, harmony, and perceived location. Status panels expose rotation energy, master volume, and preset scenes, while the gesture panel teaches key modifiers for fine-grained control. Audio is opt-in—tap Enable Audio when prompted to wake the synth in your browser.

Current Capabilities & Goals

• Responsive Panels: Gesture, control, and status panes collapse intelligently across desktop, tablet, and mobile layouts so the canvas always stays in view.
• Rotation-Driven Audio: Motion around the polytope animates a four-layer synth with seeded rotation velocities, master volume control, and preset morphing.
• Live Roadmaps: Dedicated plans track audio evolution, interface responsiveness, and MVP milestones so contributors can jump in with clear direction.

On the Near Horizon

• Expand gesture handling to include multitouch orbits, pinch-derived depth control, and pressure-sensitive dynamics on compatible devices.
• Pair device accelerometers and gyroscopes with the rotation engine so tilting or moving a tablet can steer one or both rotation planes.
• Open collaborative pathways—networked jam sessions, shared scenes, and performance-safe presets.

Deploying This Branch

When publishing via GitHub Pages, select the repository root as the source. All assets are self-contained and use relative paths, so the build will work without additional bundling. The interactive prototype lives in polychoral-instrument-mvp.html, and this document becomes the default entry point on Pages.