Jaw droppingly good
Terry Riley really needs no introduction, he's one of the most important figures in all of 20th century music. This compilation of two previously (and separately) issued live performances captures Riley at the peak of his powers, creating an almost symphonic tapestry of swirling, hypnotic and totally enchanting modalities inspired by Indian raag (among other things) performed on organ and Prophet synthesizers, respectively. If you want music that can take you out of your mind (even without the use of chemicals) then you should check this out. Utterly original, utterly sublime, utterly Riley.