Yeal, I hear voices and other audibles often during the trance state, both during meditation and the inbetween sleep/awake state at night. To me they seem to come from different sources, mostly hypnogoic. The most common is random incoherent talk and laughter. Also fairly common are shouts directed to me. I mostly ignore everything except teaching voices. Usually they are hard to understand, but sometimes they are more clear and sometimes the being that is teaching is visible. If the teachings are from a higher "me" or a separate being is really academic to me, I find them important.