This debut recording by the clean-voiced and agile Contrapunctus ensemble includes a genuine discovery, perhaps expected when scholar/conductor Owen Rees is in charge. Rees has built a reputation as a seeker-out of lost choral glories of the 16th and 17th centuries and here reveals a "new" work by Thomas Tallis. Previously thought to be an instrumental piece marked simply "Libera", Rees makes a convincing case that its underpinning is the plainchant antiphon, Libera nos, salva nos, indicating that Tallis intended it for voices. The choir sings it and works by Byrd, Philippe de Monte, Pedro de Cristo and Martin Peerson with admirable, firm-toned fluidity. More, please.