Okay I know the difference between Simple and Compound signatures. I know a compound signature the beats can be divided into 3's... I've never had a problem identifying which is simple and which is compound.. but.. why the hell does it matter?? in my college theory class the professor is making a big deal about distinguishing the two. Why does it matter if we can or not? Even though it is quite easy; I dont' see the need to even know it.