Smash TV… How do I go about getting music from it?

And by Smash TV, I do not mean the SNES version. I’m going for the arcade music. This means either from the actual arcade rom of it, the midway arcade treasures version of it, or the xbox live arcade version of it.

I can’t mearly just hold a mic up to it or rig my computer to record it because as anyone who has played the game knows, there’s constant action going on. So how do I go about getting the music out of this chaotic game? I really need it.

I assume you guys must have some way to get the music out of an arcade rom, right? I hope so at least. That’s how I’d most prefer to get it.