The kind I'm talking about is the files that has no other noises but the words of a normal file altered to where they sound like beeps that follow along with the words being spoken. Like the subliminal used here: http://www.warpmymind.com/Files/507/Curse-Muscle-Bound.php
So here's my questions:
1) Do subliminal messages register in the brain while awake or sleeping?
2) Does ANYTHING being said (normally spoken, subliminal, etc) actually absorb into the mind while sleeping?
3) If it does work, does the volume have to be at a certain level for maximum efficiency? A special type of headset (earphones, earbuds, etc)
4) Is there any easy way to keep the speakers in your ears/on your ears while you sleep?
I find that hypnosis actually messes up my sleep patterns, as fun as it is, I don't think I could constantly use files everyday like they should be. So I was wondering if it can be done while sleeping. Oddly enough, I don't recall having any nightmares while listening to tracks. If anything, it'd be dreams that would include things being said in the file. Although, that could be because I wind up listening to the file 2~5 times before finally falling asleep (I only use the body of files while doing this so it's much shorter than a full file). That would mean the last things entered into my mind would be the things I heard from the files.