14704 · Choir Glass
Hum a harmony into the glass
A rose window of sixteen of Karel's real piano takes. Hum a note and the takes whose harmony consonates with your voice light up and swell — sustain it, and the lit panes become a chord of his own recordings. Your voice only steers the glass; you never hear the mic.
Tip: sustain one note to build a chord of lit takes, then slide a semitone to watch panes hand off. With no mic, hold keyboard keys A W S E D F T G Y H U J as the twelve pitch classes.
Read the design notes
A separate microphone AnalyserNode extracts the pitch class you hum by autocorrelation. That signal is control only — it is never connected to the catalog audio graph, to createSafeMaster, or to the speakers, so you never hear your own voice through the app.
Each pane loops one of Karel's real takes. Its live harmony comes from loadTrackAnalysis — the chord under the playhead gives a root, third, and fifth. A pane's swell is the best consonance between your sung note and those chord tones: unisons, fifths, fourths, thirds, and sixths ring; seconds, sevenths, and the tritone recede. Every audible sound is one of the sixteen verified recordings, routed through a single createSafeMaster.
Metaphor: a medieval rose window / Gothic light. Lineage: Pauline Oliveros' Deep Listening. Research tie: arXiv:2608.04378 (co-creation agents that listen via hierarchical world models, Aug 2026).
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