Get ahold of random sounds, then mix them together in Audacity. Apply effects. Reverse them in time. Also, there is: bfxr / sfxr http://www.bfxr.net/ http://ww

Get ahold of random sounds, then mix them together in Audacity. Apply effects. Reverse them in time. Also, there is: bfxr / sfxr http://www.bfxr.net/ http://www.bfxr.net/