Lou Silver Harrison (May 14, 1917 – February 2, 2003) was an American composer. He was a student of Henry Cowell, Arnold Schönberg, and K.P.H. Notoprojo (also known as K.R.T. Wasitodiningrat or Pak Cokro). Harrison is particularly noted for incorporating elements of the music of non-Western cultures into his work, with a number of pieces featuring traditional Indonesian gamelan instruments, and several more featuring versions of them made out of tin cans and other materials. The majority of his works are written in just intonation rather than the more widespread equal temperament.