Steve Reich / Richard Maxfield / Pauline Oliveros ‎– New Sounds In Electronic Music (Come Out / Night Music / I Of IV)

From wiki: Reich eventually used the voice of Daniel Hamm, one of the boys involved in the riots but not responsible for the murder; he was nineteen at the time of the recording. At the beginning of the piece, he says, "I had to, like, open the bruise up, and let some of the bruise blood come out to show them" (alluding to how Hamm had punctured a bruise on his own body to convince police that he had been beaten). The police had not previously wanted to deal with Hamm's injuries, since he did not appear seriously wounded. It is probably the earliest instance of which a member of the Nation of Gods and Earths was recorded in a piece of music, a phenomenon that would increase dramatically in the 1980s with the rise of hip hop music and culture.

Reich re-recorded the fragment "come out to show them" on two channels, which initially play in unison. They quickly slip out of sync to produce a phase shifting effect, characteristic of Reich's early works. Gradually, the discrepancy widens and becomes a reverberation and, later, almost a canon. The two voices then split into four, looped continuously, then eight, until the actual words are unintelligible. The listener is left with only the rhythmic and tonal patterns of the spoken words. Reich says in the liner notes of his album Early Works of using recorded speech as source material that "by not altering its pitch or timbre, one keeps the original emotional power that speech has while intensifying its melody and meaning through repetition and rhythm." The piece is a prime example of process music.