Orbit Choir
Karel's Welcome Home piano recordings become a circle of voices scattered around your head, blurred and out of tune. Over about six minutes they orbit inward, sharpen, and settle — you gather his whole album into a room around you, a spatial Forty Part Motet of his own music.
Use headphones — the spatial field is rendered binaurally (HRTF) and won't work on speakers.
Turn to face a voice and it gathers home faster. No phone sensor? Drag left/right or use arrow keys. A slow auto-tour plays hands-free.