I found this great study on music/plants. According to the report, playing music to your plants: 1)Accelerates their growth; 2) Increases the amount of nutrients; 3) Gives a heavier fresh weight; 4) Accelerates ripening. They believe it's due to a stimulation of the plant's meridian system. Read the report here:
http://sps.nus.edu.sg/~tanshenm/2171.pdf