Calabi

Calabi is a music toy you can see. Every room is a shape from the hidden dimensions of mathematics – Calabi–Yau manifolds from string theory, a Klein bottle, a four-dimensional cube, an endless fractal – and every shape moves to its own house track, made live on your phone. The maths of the music is the maths of the picture. The notes of a chord vibrate in simple ratios, and the rooms are built from them: a fifth becomes a three-armed fractal, a triangle tunnel, a knot. Change the chord and the shape changes with it. PLAY IT • Drag up and down to ride the filter – the sweep every dance record rides • Draw across the screen to play a lead; tap for a chord • A full mixer: mute, solo, levels, echo and reverb on every part • Swap drum kits, patterns and sounds, change the key and the tempo • Save your own tracks and play them in any room LET IT PLAY ITSELF • DJ mode arranges the track for…