I think I remember seeing a much better set of procedures, involving a special set of glasses and maybe some other equpiment that you had to build, which would actually lead to something that wasn't just a fun party trick.

Oh, this is it: http://www.makershed.com/ProductDetails.asp?ProductCode=MSBM

Also, if you want a much more painful way of achieving hallucination, experience a traumatic situation repeatedly, which is clearly preceded by a distinct sound. From personal experience I can say you will occasionally hallucinate the sound in situations where it would never sensibly occur.