Try Pink Floyd... :=) or The Doors, Jimi Hendrix. But IMO Jimi Hendrix and Pink Floyd are the best while tripping.If you like electonic music, then you should try SPHONGLE.
Jefferson Airplane can be a nice music for you, specially "white rabbit".

If tou want something more powerfull, you can even listem to trance music, were INFECTED MUSHROOM sould be just fine...

But you can listen all kinds of music, but try to stay away from those who are sad, and contain sad lyrics... always prefer happy music, melodic and full of sounds...

You can even use nature sounds, and they should work fine...