This transcription of "Riot" is based on the version played on Herbie Hancock's "Speak Like A Child". The tune is also recorded on Miles Davis' "Nefertiti" with slightly altered structure.
The composition includes an unconventional EmMaj9 (add b6) chord, which implies E harmonic minor scale (1, ½, 1, 1, ½, 1½, ½). The bass creates a strong and active counter-melody - or more like the leading melody - to the chord at introduction and bars 10 - 13 of the melody chorus.
The chords at bars 6 - 9 of head are a rather enlightened guess - the chromatic movement through
the short progression sounds agreeable to me though. The solo section on the recording is harmonically more eventful.
I noticed a few differences----when it does the section in 3/4 the chords are a bit different....as well as the chord that precedes that section.
1st time: Dsus13 - A/G - F0 - B7/F#
2nd time: A-7 - A#0 - B-7 - Emaj7/D# proceeded by Dmaj7#5/E
The alternate melody line is from Miles Davis' "Nefertiti".
The 3/4 part harmony differs from recording to another. The given chords for the 3/4 part are from Robert Glasper's recording. On Miles' version I hear the 3/4 part changes going like: |D-11 |C7/Bb |FMaj7 |F7b5 |. On "Speak Like a Child" the 3/4 part harmony varies on each repeat.