Jim Oblon drops some blues science, demystifying the practice of alternating between parallel minor and major pentatonics ...

The idea is to learn how the 12-bar blues structure works, starting with single notes (one per bar), and then building up to two notes, then three, then four, then with different rhythm patterns ...

Blues in simple time with four beats in the bar and mostly follows a 12 bar blues chord structure ... This was originally used in blues music to make a sound like a human cry.