well dude most composers who want more melody use more notes, but even then there might be no eg- maj7, min7, dom7, dim, sus2, sus4, add9, and similar chords, i guess these notes u might see in spanish songs where they play every note, eg: every word 1 note like that, but this also doesnt apply to all songs, well music is never ending, its been there from atleast 4000 years, so i guess it just carries on.....your second questions answer im also waiting for someone to explain. im playing from 7 years, but i play the starting chord itself. like if its Em/G, Am/F? i play em and am
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