Thanks to Adam Bartlett from The Chant Café for sharing Frank La Rocca’s beautiful rendition of O magnum mysterium. He writes,

The O magnum mysterium is a one of the most beloved ancient Christmas texts in the Christian tradition. It is properly found in the liturgy as a responsory for Matins of Christmas, but through the choral settings of Victoria, Palestrina, Poulenc, and – perhaps most popularly in our time – Morten Lauridsen, it has become a standard part of the Christmas choral repertoire, especially for Midnight Mass.