Mind-altering Sounds

A workmate 'o mine stumbled on this software called SBaGen which uses your computer's soundcard to generate Sequenced Binaural Beats. From one of the accompanying text files:

The basic idea of binaural beats is that by applying slightly different frequency sine waves to the two ears, a beating affect is created in the brain itself, due to the internal wiring of the brain. If, in the presence of these tones, you relax and let your mind go, your mind will naturally synchronize with the beat frequency. In this way it is possible to accurately lead the brain to various states, according to the frequencies that you apply.

Groovy.