 The group initially included calligrapher and light artist Marian Zazeela (who married Young in 1963), Angus MacLise, and Billy Name.In 1964 the ensemble comprised Young and Zazeela, John Cale and Tony Conrad (a former Harvard mathematics major), and sometimes Terry Riley (voices).Since 1966 the group has seen many permutations and has included Garrett List, Jon Hassell, Alex Dea, and many others, including members of the 60s groups.