for orchestra, 4 sine-wave generators and 4 ring modulators (cond.) (undefined number of microphones; the rest of the equipment as in Work No. 16½ MIXTURE for small orchestra)
for orchestra (with corrections until 1993) (cond.) (2 x 2 micr. for 2 harps, 2 x 2 micr. for 2 pianos, 4 micr. for doubles basses, 2 x 2 loudsp., mixing console / sound proj.)