Changes

e--------------------------------------5--8-- b--------------------------------5--8-------- g-----------------------5--7--8-------------- d-----------------5--7----------------------- a--------5--6--7----------------------------- e--5--8-------------------------------------- A C D D# E G A C D D# E G A C Notice from our blue note analysis above, the scale uses the m3 and m7, and incorporates the d5 - these are the common blue notes. Since the blue notes replace the M3, P5, and M7 of the major scale, the blues scale can actually be played over a major or minor key with the same root, although it will clash with the major scale if the blue notes aren't expressed as striving towards their major counterparts. == Blues Progression ==The most common blues progression is the 12-bar blues, which consists of 12 measures, each featuring 1 chord per measure. Typically, the first four bars establish the I chord as the tonic. The next two bars introduce the IV chord before returning to the I chord for 2 more measures. Then we either get two bars of V or 1 bar of V followed by a bar of IV, before returning back to I for the last 2 measures.  1 2 3 4 5 6 7 8 9 10 11 12 I - I - I - I - IV - IV - I - I - V - V - I - I I - I - I - I - IV - IV - I - I - V - IV - I - I I - I - I - I - IV - IV - I - I - V - IV - I - V I - I - I - I7 - IV - IV7 - I - I7 - V - IV - I - V7 The last 4 bars are often called the turnaround, involving the V - IV - I or V - IV - I - V progression, which leads back into the beginning of the entire 12 bar progression. The V - IV - I progression is called the ''Blues Turnaround''.