Chords to I Know You Know by Esperanza Spalding
Some say it's a simple blues scale A and D:
The main progression is switching between a plain D and a Bbmaj7+5, which is just Bb and C added to the D major scale. For improvisation, this is pretty much just a D mixolydian scale.
Harmony vocals open, and the Wurlitzer enters with the chord D/C ... Interlude: | D | % | Bbmaj9+5 | % | | D | % | Bbmaj9+5 | % | A: | D | % | Bbmaj9+5 | % | | D | % | Bbmaj9+5 | % | | G#o | Gm11 | C13 | % A13 | Chorus: | D | F#7+9+5 | Bm9 | E13b11 | 1. | Bbmaj9 D(add9) | F#7+9+5 Bm7+5 | Em7 A11 D | % A6 :|| (from here it's back from the top, down to the 2. ending, which is leading on to the C-part.) 2. | % C#� C9 | C: | Bm9 Bbmaj9 | Am11 G#� | Gmaj9 F#7+5 | Em11 A#o | | Bm9 Bbmaj9 | Am11 G#� | Gmaj9 F#7+5 | Em11 | Interlude D: | Emaj9/G# | Gm6 | D/F# | Bm7 -/A | | Emaj9/G# | Gm6 | D/F# | Fmaj7 | Em9 | Bb+5 | 2x Interlude 2x Chorus C Interlude + harmony vocals
Hope this helps!
All the best,
"Jazz washes away the dust of every day life." -- Art Blakey