music modules at St Andrews?

Hi, I’m currently studying for my Nat 5s and thinking about picking Highers and what I want to do at Uni. I want to incorporate music into my degree, and I’ve been looking at options for that in Scotland. So far I’ve found Aberdeen and possibly St Andrews as options? I was wondering if anyone had any advice about doing music modules alongside arts degrees at St Andrews because their website is quite vague. Ideally I’d like to do Economics, International Relations or possibly Law alongside music.

Thanks!