Uses binaural beats to create opiate-like effect in your brain.

Tried this for the full 30 minutes, it definitely had an effect on me.  I started to get really heavy after about the 8 minute mark.  Your mind becomes very fixed on the subtle discrepancies in vibration. 

At the 15 minute mark I began to have really heavy eyes and by 22 minutes I started going in and out of dream like states, completely awake but nodding in and out.

By the end my eyelids were very heavy and my arms were like jelly.  I had a slight but very noticeable nausea.  Afterwards I listened to my Moonlight Sonata recording in A432hz just to give my ears a comfortable adjustment.

Certainly an interesting notion.  Using sound-waves and frequencies to alter brain patterns and consciousness.  I would be very curious to see what this binaural effect would have on the mind utilized in a more musical way, with melody and rhythm.

-B