what does this mean in a lead sheet : theres a chord and another chord on top of it in pharantheses like (Em9 Abm7 Db7#9 Gm7b5) and under this there's G13 (lines up with Em9) and C9sus (lines up with Gm7b5)
maybe parenthesis was the way someone actually played it, but the regular version was maybe what you could do if you wanted to do it simpler. looking at your example i can't imagine that those 2 options would ever work in the same place and time, but maybe it makes more sense in context