I would like to study contemporary music such as 80's pop, 90's rock, video game music (NES, SNES, Genesis) and more. However, my background knowledge of music theory is in tonal harmony.
I have absolutely no idea where to start. I've seen some music books with chord names above the staffs instead of Roman numerals and I'm assuming this is how to analyze contemporary music. Here's an example:
This leads me to ask a lot of questions:
1) How do you know it's a G or a Cmaj7 chord? Couldn't an inversion lead you to conclude the chord is something else?
2) How do passing tones come into play?
3) How do you know what chord goes to what? Is there some kind of guide or are the chords there simply to identify what's being played?
4) In the picture, what is a B7/D# chord?
There's also this YouTube channel which goes into detail about analyzing video game music, but I get lost easily because he goes too fast and he talks about things I haven't been exposed to.
Where do I start? What books can I read to learn about contemporary theory? Does Jazz theory help with contemporary theory?