How do I play background music tracks?

I have an audio pack I got from the Marketplace and now I want to have the tracks be played one after another… like a sound track…

Also when I go into combat, for instance, it goes to the combat music and then after back to the normal music…

Ive looked everywhere… and nobody has what im looking for rather just playing one song on loop forever

When you play a sound with an audio component, use that audio component to then stop the sound when you need, then play another sound.