A cool article I heard over the weekend - with some very cool music... At almost an hour in length, the piece unfolds like a slowly shifting dream, with sections of repeated material ebbing and flowing around a cycle of 11 chords. It's scored for strings, percussion, woodwinds and voices, and takes tremendous concentration on the part of the 18 players. To this day, the work is mainly performed by the composer and his loyal group of musicians. Listen ViaNPR. Some ok videos on youtube.