Not only has he composed many significant pieces, but he has also written extensively on the topic of what he terms, “sonic art,” and contributed to the design and implementation of many software tools used in the creation of digital music.Wishart's compositional interests deal mainly with the human voice. This is most evident in his VOX Cycle, Tongues of Fire, Globalalia, Two Women, and American Triptych. He is also well known as an improvisor of extended vocal techniques. A clip from a video piece by Steina Vasulka based on one of these improvisations can be seen here.