You don't know what love is (Don Raye, 1941)

1°/ Interpretations :

- John Coltrane : youtube link
- Billie Holiday : youtube link
- Nina Simone : youtube link
- Chet Baker : youtube link  + Chet singing : youtube link.


2°/ The grid :
- Part : link missing
- Ballad, tempo 70 bpm.   
- A  A' B A' form.
- We play it using a lightly simplified grid  : on measure 19 we play Eb7 like at measure 18, rather than Eb9sus4 : 

A :
Fm7      / Db9 C7b9 / Fm  C7b9 / Db7     / Gm7b5 C7b9 / Fm6 Ab7 / Db7      / Gm7b5 C7b9 /
A' :
Fm7      / Db9 C7b9 / Fm  C7b9 / Db7     / Gm7b5 C7b9 / Fm6 Ab7 / Db7 C7b9 / Fm6        /
B :
Bbm7 Eb7 / AbMaj7   / Bbm7 Eb7 / AbMaj7  / Dm7    G7  / CMaj7   / Db9      / C7b9       /
A' :
Fm7      / Db9 C7b9 / Fm  C7b9 / Db7     / Gm7b5 C7b9 / Fm6 Ab7 / Db7 C7b9 / Fm6        /


3°/ Analysis & improvisation:
F minor progression with a switch to relative major tone (Ab) leading to a quite odd major tone a whole 3rd away (C) and back to F minor.

    I     /  trII    V  /  I    V  /  trII  / II     V   /  I     III  /     trII    / II     V  /
    I     /  trII    V  /  I    V  /  trII  / II     V   /  I     III  / trII   V   /      I     /
 sw Maj II - V - I   /   % repeat % / sw Maj3rd II - V - I /     trII    /      V    /
    I     /  trII    V  /  I    V  /  trII  / II     V   /  I     III  / trII   V   /      I     /

Tonality of F minor :

• Fm7 = I*
• Db9 = Tritonic subs of II7 (G7) = 'secondary dominant' relative V of V (C7b9). Q? : can we play II instead at comping? and at soloing?
• C7b9 = V
• Gm7b5 =II
• Fm6 = I*
• Ab7 = III (?? should not it be Ab+7 ?? is it a tritone of trII ???)

(*) Im6 and Im7 are interchangeable in this context.

• A nice page about minor harmonisation.

Tone switch to Ab Major :

• Bbm7 Eb7 / AbMaj7   = Ab II-V-I
• F minor is the minor relative scale of Ab major.

Tone switch to  C Major :

• Dm7  G7  / CMaj7    = C  II-V-I
• The introduction of C II-V-I there is not theoretically obvious. Passing from Ab II-V-I to C II-V-I can be explained this way : 
• interval of one major third above Ab, à la 'Giant Steps' Coltrane Changes. 
• Ab is the tritone of D

4°/ Arrangement :

- Theme :
Melody played by wind soloists.
2 first A sections (A and A') are played rubato, that is with elastic harmonic rythm : the combo follows the soloist for changes. If a single note spans for two chords, the soloist underlines the change rythmically by ???
The combo is back on a straight rythm pattern as from the B section.
- Choruses : ??
- Ending : ??

5°/ Solos :

No remark.


6°/ Play-alongs :

 - Band-In-A-Box : link mising.