condition (disc/cover): NM / NM - Messe De Liverpool / Pierres Réfléchies on Mantra couples Pierre Henry's mass composed for Liverpool Cathedral with a later piece whose title, "reflected stones," suggests both physical acoustics and philosophical contemplation. The mass transplants musique concrète into liturgical context; the stones return it to the laboratory.

Liverpool Cathedral's commission acknowledged Henry's status as major composer, not mere technician. The resulting mass doesn't comfort; it challenges, forcing congregants to hear sacred space anew. "Pierres Réfléchies" provides secular counterweight, reflection without religious framework. Mantra's coupling lets listeners measure the distance between church and studio, discovering how much they share.