A quick question: Do we have any record or reliable way of knowing what Roman music sounded like?

It's obviously simple enough to know which instruments they played, but I would like to know how their music was structured. Along these lines I would love to know what kind of musical scoring system the Romans used and if any of this music survived into modern day. The types of occasions where music was played would also be highly intresting. Did the Romans have "Marching" and military themed music the way we do now?