"Spem in alium," not just the greatest of Tallis's compositions but one of the greatest of all time, is based on a liturgical text, written for 40 independent voices, and was first performed in England in 1573. A work for 40 voices is not one that would usually be associate with the legendary all male sextet The King's Singers. Through modern recording technology, flexibility and experimentation, the six have become 40, a true harmonic convergence that occurs when the pairs high, sweet voices throw the sound across the space between them until finally all voices join for a full culmination of the work. "Spem" is a stunningly beautiful piece, although very short, eight minutes and 22 seconds to be precise, and we listened to it several times to truly appreciate it. The piece is followed by a 6-minute interview with the Singers, who discuss the experience of recording it. A short sublimely beautiful piece, recorded by one of the world's finest choral ensembles. SACD