The best hemi sync, in my opinion, is a 6 CD set 'Journeys out of the body' and you can download it here.

Click Here...

We use this in the Practical Astral Projection Intensive, a 5 week course we run a few times a year. A new one is just starting and we are still taking people for this current course, should you be interested. Click Here...

The idea is to learn how to stay conscious during the first CD, called 'meditation'. When you can do this, you move to Condition A CD, then to B, C, D...with D being the full mind awake body asleep state ideal for OBE

peace, robert