The first thing to consider regarding "auditory hallucinations"—whatever specifically you mean by that—is...did you LIKE it? If you did, cool. Go for it again.
If on the other hand you would rather not have it, you can do two things. 1) Before listening to the tape, tell yourself what you want to experience, including the benefits you will receive. 2) As the recording finishes, and before you open your eyes, tell yourself the desired mental/physical state you choose to experience, i.e., mentally alert and physically relaxed.
Consider that in certain altered states, we tend to disassociate from our own internal dialog, so that our inner voice sounds like we are not generating it ourselves. To shift state, simply imagine what you want to say to yourself. Check the recent Newsweek article on SCIENCE/RELIGION describing the new science of Neuro-Theology.
