According to Fr. John Zuhlsdorf's post (January 7, 2011), Mass will be celebrated in the “Extraordinary Form” with music provided by the St. Mary’s (Norwalk, CT) Schola Cantorum: Palestrina’s Missa sine nomine, motets by Palestrina and Victoria, and all the proper Gregorian chants. David Hughes directs the Schola.
Martin Mosebach is author of the celebrated volume, The Heresy of Formlessness: The Roman Liturgy and Its Enemy (San Francisco: Ignatius Press, 2006), published with a Foreword by Fr. Joseph Fessio, S.J.
Stuart Chessman, "Visit of Martin Mosebach" (The Socity of St. Hugh of Cluny, January 13, 2011).