Some drugs clearly modify music perception.:)

Rave parties are often associated with the use of "club drugs" such as ecstasy, LSD and more recently, ketamine. There is some dispute in the dance community whether raves exist anymore, with some suggesting that the last true rave existed in 1994. Some define raves as being large dance parties of over 30,000 people characterized by mainly rave goers (ravers), consuming copious amounts of illicit drugs.

Similar to drugs, the Rave Music takes you in the world of numbness. Rave Music is often related to the neo- hippie culture of the occidental societies. Rave and Trance Music is a rebel against the established orthodox political and social systems. It is form of music that supports peace, love and personal freedom.