The URBAN AUDIO Testfahrzeug1 is equiped with a single-stringed AudioUnit. In can be either operated while standing on the side of a road with the side door open, or during driving. While static operation the AudioUnit transforms the noise of the cars passing by to musical sounds. While driving, the AudioUnit reacts to the vibrations of the engine, the wheels and the road. Each test-drive with this van gives a specific musical picture of the drive.

The Testfahrzeug1 is out of service since August 2009