[{"data":1,"prerenderedAt":4},["ShallowReactive",2],{"chart:bb-bird-blues":3},"title: Bb Bird Blues\nkind: form\nsubtitle: Blues for Alice Changes\nstyle: Blues\nform: A, 12 bars\nkey: Bb\ncontext: blues\n# analysis: 2026-10-22, rules v2; Bb, blues\n\n# bar | chord | scale\n\nsection: A\n1  | BbMaj7  # tonic: the 4th is in the key\n2  | Am7b5   # iiø7 of G minor: Locrian, the key's own notes (its ♭2 is a passing note)\n2  | D7b9    # V7\u002Fvi in Bb: b9 and b13 are in the key\n3  | Gm7     # ii of the ii–V to F minor\n3  | C7      # V7\u002Fv in Bb: natural tensions\n4  | Fm7     # ii of Bb7: Dorian\n4  | Bb7     # I7 of the blues: a tonic with dominant color, Mixolydian\n5  | Eb7     # IV7 of the blues: a subdominant with dominant color, Mixolydian (the #11 is an extra color)\n6  | Ebm7    # ii of Ab7: Dorian\n6  | Ab7     # extended ii–V: a side-step, its own key\n7  | Dm7     # iii: Phrygian, the key's own notes (the ♭2 is a passing note)\n7  | G7      # extended ii–V: a side-step, its own key\n8  | Dbm7    # ii of Gb7: Dorian\n8  | Gb7     # extended ii–V: a side-step, its own key\n9  | Cm7     # ii of the ii–V to Bb\n10 | F7      # V7 of Bb: natural tensions\n11 | BbMaj7  # tonic: the 4th is in the key\n11 | G7b9    # V7\u002Fii in Bb: the b13 is in the key, the b9 from the symbol\n12 | Cm7     # ii of the ii–V to Bb\n12 | F7      # V7 of Bb: natural tensions\n",1793484797930]