Watch the Minor Blues 7 online guitar lesson by Brad Carlton from Bluesology 2

Since we are learning and becoming more comfortable with altered chords, we now have the opportunity to use these over the progressions in this lesson.
Here, in progression 5 the flat VI major 7th and other colorful possibilities for this chord are used in measure 9. Choices for chord substitutions are increasing adding to the palette of sound which will ensure interest and variety when comping.