1970 was an important year in Eliane Radigue's musical life, since it was the year just before she acquired her ARP 2500 synthesizer. In the last year that she dedicated to feedback, several milestone pieces saw the light of day: Omnht, a wonderful sound installation for three out-of-phase tape loops and wall-mounted loudspeakers; Labyrinthe Sonore (premiered at Mills College in collaboration with Pauline Oliveros, Maggie Payne, and William Winant); Opus 17, one of her first compositions in fixed duration (according to Rhys Chatham, a decisive piece that would change his own compositional career); and Vice-Versa, etc., which appears to be her very last feedback loop composition. Originally, only 10 signed and numbered copies of this little box set were releasedÑ needless to say, this is a work that has been nearly forgotten! The work is now reissued as a double CD, with the tape played respectively forwards and backwards at four different speeds, corresponding to the standards of the tape recorders of the time. This will allow dedicated listeners to experiment with simultaneous playback of the work's different versions, recreating the conditions of the original installation. CD 1: Onward 9,5. Onward 19. Onward 38. Onward 76. Backward 9,5. Backward 19. Backward 38. Backward 76. CD 2: Simultaneous.'