He has composed music for dance theatre and in 1995 he composed with Kris Defoort the album Variations on A Love Supreme.[1] He won the Belgian Golden Django in 1998.[1] Since September 2002, he has used the aulochrome, a new instrument created by François Louis.[1] He has taught at the Etterbeek music academy since 1989.[1] Cassol collaborated with choreographer Alain Platel to create "Requiem pour L", in which musicians and dancers "perform a new version of Mozart’s Requiem while slow-motion footage of a woman dying is projected on a screen behind them".[2]