No obituary I’ve seen for the record producer Teo Macero (1925-2008) has mentioned that he was also a composer, though the Times notes that he studied with Henry Brant. I offer the only piece I’ve heard of Macero’s, One-Three Quarters (sic): a six-minute quarter-tone piece for two pianos and ensemble from 1968. It’s pretty cool. It was on an Odyssey vinyl disc, with Ives’s Quarter-Tone Pieces and other 24tet works.
As a just-intonationist, I officially disapprove of quarter-tone music and would never write any, but I harbor a secret affection for it anyway. My music starts to sound all too normal after awhile, but quarter-tone music just never stops sounding weird.
UPDATE: Tom Hamilton sends a link to recordings of Macero’s music. I always feel bad making a big deal out of a composer just after he dies. That’s why I’ve devoted the bulk of my musicology work to living composers while they’re around to appreciate it.