Atlas node · Scenes · repo-backed / needs room proof

Crowd Organ

A polyphonic instrument that translates crowd position, size, motion, and gesture into OSC-controlled voices.

Repository →

What it is

Crowd Organ treats people moving through a room as polyphonic control data. An openFrameworks host extracts voices and motion from Kinect and webcam input, sends normalized events over OSC, and leaves synthesis to the included SuperCollider patch or another listener.

What it lets people do

It lets performers or participants shape voices through position, size, motion, and gesture while keeping sensing, routing, calibration, and synthesis as inspectable layers.

What is public now

  • Project repo Implementation truth for the sensing, OSC, dashboard, and synthesis stack.
  • Public-safe description only No participant imagery or raw room capture is published here.

Evidence status

Status: repo-backed / needs room proof. The repository demonstrates implementation structure, but not a completed public installation.

Next proof object: A staged or consented 10- to 30-second room capture showing motion changing the sound without identifying participants.

Boundary note

Camera feeds, participant images, and raw room captures stay out of the public site until a staged or explicitly consented excerpt exists.

What remains unresolved

  • Validate the full host with the actual Kinect and camera rig.
  • Capture one public-safe example of crowd-to-sound behavior.

Proof objects

  • openFrameworks host Status: repo-backed. Kinect and two-webcam sensing, voice extraction, gesture detection, and OSC routing.
  • Processing dashboard Status: repo-backed. Active voices, motion grids, calibration state, and gesture telemetry.
  • SuperCollider mapping Status: repo-backed. Per-voice synthesis plus gesture-controlled registration, envelopes, and effects.
  • Validation tooling Status: repo-backed. Config validation, replay fixtures, and preflight checks.

Source trail

  • Project repo — Implementation truth.
  • Last reviewed: 2026

The Atlas is the relationship layer. Use the repository for current project-specific truth, and use studio-notes when methods, decisions, or teaching material need to travel across the fleet.

Where to go next

  • Open Scenes — Return to the pillar page for related room and participation systems.