After the release of their first 12" in 1991, Stefan and Dimitri Van Elsen have continued to release material with numerous labels. Each of the distinct styles of music which they create is released under names including Trans-4m, Brain Pilot, and Sounds Unlimited.

Their diverse interests combine to fuel the creation of a wide range of sounds and moods.

After achieving cult-status with their first ambient full CD, Sublunar Oracles, Trans-4m released a secondalbum Clustered, in 1995.

Brain Pilot are forging new sounds in 'listening techno'. In all its manifestations, the music of Stefan and Dimitri evolves to explore different rhythms and time signatures.
Brain Pilot has performed their live set at selected events in Europe and Australia.