[{"data":1,"prerenderedAt":4},["ShallowReactive",2],{"chart:september-song":3},"title: September Song\ncomposer: Kurt Weill\nstyle: Ballad\nkey: C\nform: AABA, 32 bars\n# analysis: 2026-10-31, rules v2; C\n\nsection: A1\n# area: C major (A1 1–9)\n1  | F7      # IV7 in C, not resolving: the #11 is in the key\n2  | Fm7     # ii of Bb7: Dorian\n2  | Bb7     # back door bVII7 to CMaj7: the #11 is in the key\n3  | CMaj7   # tonic: the 4th is in the key\n3  | Dm7     # ii: Dorian, the key’s own notes\n4  | Em7     # iii: Phrygian, the key's own notes (the ♭2 is a passing note)\n4  | Am7     # ii of D7sus: Dorian\n5  | D7sus   # II7sus4 before its dominant: Mixolydian, the 4th is a chord tone here\n5  | D7      # extended dominant: V7 of G7sus\n6  | G7sus   # V7sus4 before its dominant: Mixolydian, the 4th is a chord tone here\n6  | G7      # V7 of C: natural tensions\n7  | CMaj7   # tonic: the 4th is in the key\n7  | G7sus   # V7sus4 resolving down a fifth: Mixolydian, the 4th is a chord tone here\n8  | CMaj7   # tonic: the 4th is in the key\n9  | CMaj7\n# area: F minor (A1 10 – A2 6)\n10 | C7      # V7 of F minor: b9 and b13 are in the key\n@ending 1 7 8\n@ending 2 9 10\n\nsection: B\n1  | Fm6     # tonic minor sixth chord: melodic minor, the raised 7th is a tension\n2  | Fm6\n3  | F#dim7  # passing diminished: a rootless dominant ♭9; not functioning diatonically: the symmetric scale\n4  | F#dim7\n5  | Fm6     # tonic minor sixth chord: melodic minor, the raised 7th is a tension\n6  | Fm6\n7  | F#dim7  # passing diminished: D7♭9 without its D, the G7sus's dominant; not functioning diatonically: the symmetric scale\n8  | G7sus   # static sus: Mixolydian\n\nsection: A2\n1  | F7      # I7 in F minor, not resolving: the b13 is in the key\n2  | Fm7     # ii of Bb7: Dorian\n2  | Bb7     # back door bVII7 to CMaj7: natural tensions\n3  | CMaj7   # a non-tonic major chord: Lydian\n3  | Dm7     # a borrowed minor chord: Dorian, its own key\n4  | Em7     # a borrowed minor chord: Dorian, its own key\n4  | Am7     # ii of D7sus: Dorian\n5  | D7sus   # VI7sus4 before its dominant: Mixolydian, the 4th is a chord tone here\n5  | D7      # extended dominant: V7 of G7sus\n6  | G7sus   # II7sus4 before its dominant: Mixolydian, the 4th is a chord tone here\n# area: C major (A2 6–8)\n6  | G7      # V7 of C: natural tensions\n7  | C6      # tonic: the 4th is in the key\n8  | C6\n",1793575900090]