Here is an interesting podcast with Fr. Mark Moriarty, the pastor of my home parish in St. Paul, St. Agnes Catholic Church. He interviews, Mark Pilon and Paul LeVoir, two of the men chiefly involved with the Gregorian chant Schola Cantorum. I sang in that Schola for years. Chant was fundamental in my first interest in the Catholic Faith.
The Church of Saint Agnes · Chant At Saint Agnes