High School music composer...what are my chances?

Hello everyone!

So I am a senior in high school, and I compose music with many instruments, including piano, violin and other string instruments, and harp. So far I have composed 6 songs, and will most likely have 8 songs done by the time I apply to colleges. My grades are pretty average (my GPA is around 3.76, SAT score is 1450), but do you think that music composition would look impressive to colleges? I am planning on applying to UCs like UC San Diego, UCLA, UC Irvine, UC Berkeley, etc., along with Cal Poly, and top schools like Stanford for fun. What do you think are my chances, assuming that my college essays are pretty good?