Professor of Musicology at the University of Illinois at Urbana-Champaign, he has been editor-in-chief of the "Journal of the American Musicological Society" between 1984 and 1986, and collaborates with various international councils and committees. His publications include "Baroque Music", "Baroque Music Anthology", "The Life and Works of Francesco Maria Veracini", "Vivaldi's Ottone in Villa: A Study in Musical Drama" and "Roman Monody, Cantata, and Opera of the Circles around Cardinal Montalvo "(2 vols.), In addition to numerous articles in specialized magazines and collaborations in the" New Grove Dictionary of Music and Musicians "and" Die Musik in Geschichte und Gegenwart ".