Paul Halley's renowned choirs Chorus Angelicus and Gaudeamus pair up for another spectacular offering. The choirs sing with precision and clarity while incorporating a warmth and immediacy to the performance of each song. What Child Is This? comprises a selection of the new, adventurous, and less familiar sacred Christmas repertoire, much of it performed in recent years in the choirs' annual Christmas Angelicus concert series (now in its sixteenth season and broadcast annually by National Public Radio.) More than half the arrangements on the CD are Halley's work, which adds a refreshing, new sound to this mix of Christmas music. Halley's arrangements and compositions, written for these choirs and previously unrecorded, deliver the adventurous harmonies and captivating lyricism for which he is celebrated.