AiAiAI introduced The Sound Taxi as a free publicity stunt. The Sound Taxi is equipped with microphones that record it’s surrounding noise. As it made it’s way through the streets of London, a specially designed software program inside the vehicle converted the noise into unique music in real-time. Passersby heard the music via the 67 speakers built into the entire car body and the big Indian horns mounted on top of the taxi’s roof. Finally, the passengers of the sound taxi could tune-in to the converted sounds via AIAIAI headphones installed inside of the vehicle.