[lucasgw]

Also, many cultures have microtonality as the basis of melody. Makam in Turkish/Ottoman classical music, Qawwali in Pakistani Sufi music, both Carnatic and Hindustani music from Inda, Tuvan from Mongolia, etc. A great recent example is Aphex Twin's most recent album - Syro - which is pretty much end-to-end quarter-tone and microtonally based.