Working in Braille, often composing under his cloak on the sidewalk, he wrote in an impressively wide range of styles: percussion-driven exotica (he made his own triangular drum-and-cymbal instrument, the trimba), avant-garde jazz, folkish madrigals, Bach-like neo-Baroque rounds and canons for chamber orchestra, symphonies for full orchestra, and a layered minimalism that influenced his young collaborators Steve Reich and Philip Glass .