I'm guessing this it the right thread to write this on.
In the video (I don't unfortunately own the songbook) Justin calls the the third chord you play in the intro a G/B but later in riff number 2 he plays the same chord again (with different fingers) but calls it a Bm.
Is Bm = G/B? I don't undertand this at all.
Does he call it a Bm because the notes in G/B are the same notes you would hear in a Bm chord? And it just happens that we're playing only a part of the Bm chord? AND those notes are the same notes you would hear in a G/B chord!? I would call it a G/B but that is just because it looks like a G/B chord.
I think need to read that music theory book since this is puzzling me.
in the second riff, when the left hand is pressing on A7 (b and d string of second fret) it seems the right hand is not playing the d string at all, but rather playing the a string. what am i missing?
I think you can just play the A7 with one finger. I guess it is just easier to remember what to play. You can just think about A7 and play it and not think about what string to put your finger. Also it probably doesnt sound terrible if you accidentally hit the d string. It might even sound cool.
PS. I'm just barely out of the beginner course so I don't have much authority to tell you this. Just my opinion.