Prelude No. 6 chord names by bar number 1 (whole tone scale chord) 2 (octatonic/symmetrical scale chord) - - - - - - - - - - - - - (bars 3 - 18 use part of the Hamilton sequence) 3 EbM7/D 4 EbM7/D 5 EbM7/D 6 EbM7/D 7 EbM7+5/D 8 EbM7+5/D 9 Eb7+5/Db 10 Eb7+5/Db 11 CmM7 12 Cm7 13 BM7+5 (F## spelled G for convenience) 14 B7+5 (F## spelled G) 15 Am7b5/C (A half dim.) 16 AbM7/C 17 AbmM7 (Cb spelled B) 18 AbmM7 (Cb spelled B) - - - - - - - - - - - - - 19 Bb7sus 20 Bb7sus 21 Ebm7 (add 9, 11, 13, the note G) 22 Ebm7 (add 9, 11, 13) (or DbM7/Ebm)