All Blues uses a head arrangement, a structure often found in jazz. A head arrangement is a chord progression which is memorised by the players.
The head arrangement in All Blues is the 12-bar chord progression. Jazz players refer to chord progressions as 'changes'.
These are the elements of the 12-bar chord progression in All Blues:
- each repetition of the 12-bar progression is known as a chorus
- each of the soloists improvises in the choruses so it is a set of variations
- the piece opens with an intro and ends with a coda
Each of the main sections is introduced by a 4-bar riff. A riff is a short repeated pattern.
- 4-bar intro (rhythm section)
- 4-bar riff (saxes and rhythm section)
- head 1 (a 12 bar head with muted trumpet playing melody)
- riff and head repeated
- four 12-bar choruses for trumpet
- four choruses for alto sax
- four choruses for tenor sax
- two choruses for piano
- one chorus (all instruments with trumpet now muted)
- head repeated
- coda (solo muted trumpet)