I found this new article about the possibility to learn in your sleep:
These investigators show for the first time that new foreign words and their translations could be associated during a midday nap with associations stored into wakefulness. Following waking, participants could reactivate the sleep-formed associations to access word meanings when represented with the formerly sleep-played foreign words. The hippocampus, a brain structure essential for wake-associative learning, also supported the retrieval of sleep-formed associations. The results of this experiment are published open access in the scientific journal Current Biology … .
Would that also explain the possibility of subliminals create actual change, when listening while sleeping`?