This two-disc set, the second release on Giuseppe Ielasi’s Schoolmap label, documents one of the earliest pieces in what would come to be Radigue’s definitive style. Composed on the Buchla synthesizer at New York University in 1971, it consists of two components that are to be played simultaneously but not necessarily synchronized. Each part is presented separately in this package, one per disc, so the listener can experiment with mixing the two parts on separate CD players. Each disc also contains a more recent complete realization, the first by Radigue herself in 2001 and the second by Ielasi in 2006. Each of the two original components, called “Part 1” and “Part 2,” consists of the morphing drones so familiar to followers of Radigue’s but, unlike most of her work, both parts feature pulses throughout. The pulse is higher and faster in “Part 1,” where the pitch content generally is higher and shimmers more, while “Part 2” growls in a lower register.