Charles Ives
Sinclair is notably a specialist in the music of Charles Ives; he has "spent [his] whole adult life devoted to the music of Charles Ives." He has published A Descriptive Catalog of the Music of Charles Ives, with the Yale University Press, and served as music director for a number of PBS documentaries, including A Good Dissonance Like a Man, about Ives. He is currently an Associate Fellow of Berkeley College, and overseas the Charles Ives papers, as well as those of pianist and Ives scholar John Kirkpatrick.