Pro Organo

Nancy Granert, Jim Parsons, Wesley Chinn, Heather Craw, Nora Lehmann, Harvard University Choir, Murray Forbes Somerville

Lisa Edwards-Burrs, Deborah Cuffee Davis, Choir of St. Stephen's Episcopal Church, Richmond, Virginia and Neal Campbell, Neal Campbell, Robert Hodder, Michael Holland, Robin Moore, Robert Murray (tenor), Melba Williams, Virginia

Dorothy Papadakos, Dennis Yerry, Elizabeth Henreckson Farnum, Steve Gorn, Pandit Ramesh Mishra, Raimundo Penaforte, John La Barbera, Theresa Thomason, Alex Norris, Vashon Johnson, Nate Smith (drums), Gentlemen of the Cathedral Choir of St. John the Divine, New York City, Johnson Flucker

John Ayer, Memphis Boychoir, Memphis Chamber Choir

Frederick Hohman

Alan Lewis, Choir of Calvary Episcopal Church, Pittsburgh, Calvary Choristers, Charles Lirette, Lisa Buhler, Matthew Cummings, Thomas P. Smith and Alan Lewis, Thomas P. Smith

Janette Fishell

Aaron Tan

Kalle Toivio

Michael Smith (singer), Adam Charnley (singer), Ryan Mariotti (singer), Ryan Carlin (singer), Matthew McDonnell (singer), Patrick Quigley (singer), Yogeld André (singer), Patrick Parks (singer), Justin Gagnon (singer), Zachary Gustafson (singer), The Notre Dame Glee Club, Daniel Stowe