There is the whole flip a coin and see how you feel with the outcome strategy. My S17’s close friend is at CMU in biomedical and electrical engineering and he works VERY hard and is extremely happy there. The choice here seems to be CS primary vs. CS plus core. The music aspect seems possible in both schools, but given how much work CS entails the other question is how much time will you have to pursue your music interests, and to what extent/depth? It is tough to make the choice but the good news is that either way you end up at an amazing school which is what most college applicants hope to achieve.