Before I leave for the weekend...again...I wanted to part with a few words of wisdom. After school, while washing my hands I had this moment of sudden brilliance. Just, pop, hey I'm smart.
While soundwaves are traveling through the air, they disrupt air molecules, jumbling them. Although the soundwaves are making them jump up and down and side to side, there's another force affecting them, gravity. So while a molecule may get bumped up, gravity is pulling it down, changing the sequence the air molecules hit one another and therefore warping the sound. So does gravity effect sound? This all takes place so quickly I doubt gravity has much pull in the matter. But still, interesting concept.