Offices of Lauds (including Ave Regina Coelorium), Vespers, and High Mass (including Orbis factor) The ambient acoustics of Notre-Dame add to the power of the stirring services sung by the choir, directed by Jehan Revert, with appropriate and sumptuous improvisations by titular organist Pierre Cochereau. Recorded in 1976 and heard frequently on Richard Gladwell’s radio program With Heart and Voice.