Really anything man. 60's music works...The Beatles, The Doors, etc. Animal Collective is good as well. Recently I listened to MGMT's album "Congratulations" during an acid trip...it blew me away! It's like the whole thing was made to mess with ya while tripping. The order of the track list is very important. This was awesome during my trip as well for some reason haha. It's a French sailor singing...there's no music with it. https://www.youtube.com/watch?v=k71zTwPyi14"]https://www.youtube.com/watch?v=k71zTwPyi14