Niblock's Sound Spectrums - Within Invisible Rivers (2019)

American composer and filmmaker Phill Niblock (1933) is one of minimal music's key figures. His hypnotic, visceral music - often consisting of a single, constant tone with minimal variations - makes him a drone music pioneer. His compositions are simultaneously subtle and overwhelming. At his live performances in factories, concert halls and art institutions, the audience are bowled over by the sound.