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Blues And Rock Scale Options
Here is the complete 12-bar blues progression. The turnaround contains a new chord, E, which is the V (five) chord in the Key of A Blues. There are almost an endless variety of turnarounds for the blues. This is definitely worth researching. This is one of the most common (bars 9-12).
All of the scales previously mentioned will work in some way over the turnaround, in adddition to others like E Mixo and E Bebop Dom. This is the most tense part of the blues and it kind of carries the tension of the A to D change to a new peak. Experiment!