I go to Leeds (final year) and am also a musician.
We have a LOT of music based societies varying from orchestras to jazz bands to acapella to societies designed to help you form a band. Liverpool is also a good choice for music scene, but we did used to have Live at Leeds which is a big part of the Leeds uni culture. I know a lot of people who love music who are very glad they chose Leeds.
The social life in Leeds is notoriously very very good and the campus is beautiful and one of the biggest single-site campuses in the country. I am sure you can find tours on youtube (for example:
https://www.youtube.com/watch?v=xyv_eT8e750) and maybe come and visit if you aren't far away.
Basically I would highly recommend Leeds, especially for someone who is into music. I've had a great time. I also see you may take philosophy modules; I did too and the lecturers and modules on offer are great.
Feel free to message me if you want.