Complex sentence: He founded and leads the Balanescu Quartet closely assisted by Clare Connors, and is a founding member of the Michael Nyman Band, performing on most of their albums, except between 1994 and 1998, as well as other ensembles playing Michael Nyman's music.
Split into simpler sentences: He founded and leads the Balanescu Quartet closely assisted by Clare Connors. He is a founding member of the Michael Nyman Band and has performed on most of their albums, except between 1994 and 1998 as well as other ensembles playing Michael Nyman's music.