Q: If you have, how do you feel about measures 5-6 of the original Underground Theme, i.e. the melodies and chords - they seem to make very little sense. Your thoughts?
A: i'm assuming you are talking about the bass based theme, originating in "super mario brothers" for NES, and replicated across the majority of the mario franchise for the underground themes. the original version has no chords in it, and most versions i've heard do not have chords in it. for the first 4 bars, it seems to vaguely imply C7 and F7, but the part after that seems to not imply any particular chords. in envokes a sense of disoriented burrowing, which does fit the context