A key figure in Welsh music for several decades, Peter Reynolds was especially active in the musical life of his hometown of Cardiff, where he taught at the Royal Welsh College of Music and Drama. He was artistic director of the Cardiff-based PM Music Ensemble, which he formed in 1991, and also the Lower Machen Festival (1997–2009). His compositions feature a number of short instrumental pieces, including Penllyn for solo piano, which was premiered in August 2016 by Duncan Honeybourne at a York Late Music concert.