Sound in dreaming...?

this is a journal i just posted... but i have a question at the end of it . :-P

last night i had a dream i was hanging out with my best friends little bro, we were on our way to the spurs game in a truck that kind of resembled my uncle's truck. His mother ended up getting frustrated with something and left us the truck...i was driving and i got a little lost and went on a ramp and there was construction. (boy) told me just improvise... and i know in reality i dont think he knows what that means...But! anyways, i ended up turning the truck somehow into a skateboard and we walked to this special school, i dont know why but we were there... what creeped me out was that in this dream... i saw this guy that i had seen before there at the school? im not sure if he was from a previous dream but i really had this sensation that i knew him really well... like i knew him in my waking life or something im not sure. but he told me to please wait... as i think right now i cant remember what he looks like but i remember the feeling of knowing him... while i was waiting there were children playing the violin... and it was breath taking to hear these kids playing... I remember the music being close to heaven, it was so beautiful... i was thinking about a question earlier if it would be possible to hear things that werent even possibly heard in your waking life? i mean your not limited to your ears? but just a little closed minded to sound in your dream... wonder if its possible?