rev.

A rally car takes a lap in the dark. Then it pulls up, the camera swings to the driver's window, and he says his piece. Drop in a voice clip and he says yours — the mouth follows the recording. Add a tune if you want one under it. Nothing leaves your device.

The engine is a bank of nine loops recorded at fixed revs, the two nearest crossfaded by the revs — lifted from the rally game, where it was settled after trying to synthesise it. The car, the driver and the track are generated in Blender by rev-src/build.py; there is no .blend anywhere.