Clarke worked with synthpop producer Martyn Ware (of Heaven 17 and The Human League) in 1999 as The Clarke & Ware Experiment and released the album "Pretentious". The duo collaborated again in 2001 for the album "Spectrum Pursuit Vehicle", which was created with "3D music technology" specifically designed for listening in headphones. That same year also saw the release of the Clarke-produced album "Erasure's Vince Clarke", which featured "The Peter Pan Effect", an album that he and Eric Radcliffe produced for his long-time friend Robert Marlow. Clarke wrote "Let's Get Together" for the pop girl group Girl Authority for their second album, "Road Trip". The song was originally meant to be for Depeche Mode but was never recorded by them. Clarke also co-wrote "What Do I Want From You?" with Freeform Five, for their album "Strangest Things" (2005).