Figure 1 is an improvised solo played over the 12-bar form ... as I descend the A blues scale while also touching upon the chord’s major 3rd, C#. When the progression moves to D7 in bar 5 ...

Blues scale Improvisatory ... could play an ascending staccato major arpeggio and then a trombone could answer with a slurred descending minor arpeggio. 12-bar blues structure In performance ...