Marten Joustra composed music for Psygnosis / Traveller's Tales games. He worked with Andy Blythe on all projects, the duo being later known as Swallow Studios. Their speciality is jazz, although they also wrote in other genres.

Aside VGM, they wrote music and songs for the UK TV show Dick and Dom in da Bungalow, which aired between 2002 and 2006. A soundtrack CD of this music was released.