Karlheinz Stockhausen's work for eight channel tape, which is comprised of 24 melodic lines indeterminately manipulated across 7 octaves, in 24 registers, in 24 tempi, each containing between 1 and 24 tones. The work begins with the retroactively determined, generated lines that represent the lowest registers and the slowest tempi, and works upwards throughout the duration of the piece. Hour 13 of