An electronic improvisation trio whose fundamental concept is completely different from that of earlier, performance-based improvisation.

The members of I.S.O. are Yoshimitsu Ichiraku (playing self-made electronic instruments), who made his mark as a drummer on Omoidehatoba's CD Vuoy; sampler player Sachiko M, the former Ground-Zero member who expanded the alternative possibilities of the sampler, and whose work has included everything from solid low-fi sampling with Hoahio, to memory-free sampling focusing on sine-wave-only solos; and turntable player Otomo Yoshihide, who since the disbanding of Ground Zero has been deepening his exploration of post-sampling music.

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