THE 600-CELL — five 24-cells in one Clifford double rotation (3:5 turns)
Five voices in just pentatonic tuning, one per coloured 24-cell. Each strikes when its leading vertex surfaces — reaches maximum depth in the fourth dimension. The rotation gives only three phase classes, so there are three attack moments per turn: cell 1 alone at centre, then two mirror-pairs that strike together. Those pairs are separated by ear rather than by time — opposite sides of the stereo field, two octaves apart, and contrasting timbre — so five voices are heard in three moments. Roughly a hundred strikes per 66-second turn. The 3:5 turn ratio (a Fibonacci convergent of φ) is the loop’s audible comma. Computed from the same coordinates as the picture. Press sound to begin.