yeah most of the music you like already helps you go to a certain state in your mind, just like drugs heh, so you probally already know what you like on psyches or you can expirement
I tend to like the music i got into while rolling and just modern stuff. stuff that makes me feel relaxed or good .
I must agree! Sigur Ros on LSD is unbelievably beautiful, especially Takk. I do think though that Pink Floyd, particularly Meddle (more specifically Evhoes) Dark Side and Piper At The Gates of Dawn, and Zepplin (especially Led Zepplin III) are the best music to listen to on acid than by absolute miles.