Later, Conrad composed more than a dozen audio works with special scales and tuning for solo amplified violin with amplified strings. Releases included "Early Minimalism Volume 1", a four-CD set, "Slapping Pythagoras" in 1995, "Four Violins (1964)" in 1996, "Outside the Dream Syndicate Alive" with Faust, from London 1995, and "Fantastic Glissando". He also issued two archival CDs featuring the work of late New York filmmaker Jack Smith, with whom he was associated in the 1960s. He released the 1968 recording of "Joan of Arc" in 2006.