He created some of the first meritorious works in the field of computer music, including Earth’s Magnetic Field (1970), which mapped magnetic field data to musical sounds, Speech Songs, a 1974 work that used analysis and resynthesis of human voices, The Waves (voice and computer music), Profile, and Any Resemblance is Purely Coincidental (1978), which combines live piano performance with a digitally-manipulated recording of Enrico Caruso singing the aria "Vesti la giubba".