So ive always wondered what it was, for awhile ( not as often now but still sometimes ) ill be in bed, just laying there, and before falling asleep i can begin to actually hear music as if it was in my ear, sometimes its songs i havent heard for a long time but i can still hear lyrics good and stuff until i focus on it and try to listen then it kind of fades off into silence within a second or two, but then itll go back and usually be a different song, do you think this may be some sort of hypnotic imagery thing? Just been wondering....