Okay, I've got a quite a few essential tripping songs but here are three of them: Aerosmith -- Lord of the Thighs Talk Talk -- I Don't Believe in You Talk Talk -- Life's What you Make It These songs are amazing without any assistance but under the influence they rule. The lyrics to Lord of the THighs don't mean much but--goddamn--the music rules. Add some songs to my list. It would be cool as hell to discover a few new ones.
pink floyd - great gig in the sky / shine on you carzy diamond (all parts) or Kashmir (london philharmonic orchestra's led zeppelin tribute c.d.)
star shpongled banner - shpongle spinning 'round - meat beat manifesto the whole Consumed cd (plastikman)...absolutely unfuckingreal patterns - speedy j blue flowers - dr. octagon anything by: Boards of Canada thomas fehlmann (from the orb) future sound of london autechre massive attack vs. mad professor (No Protection) Team Doyobi Bola shpongle Lusine
De-Loused in the Comatorium by Mars Volta is great while tripping, just listen to the whole thing and let yourself drift away in the music.