Blues scale: formula 1 ♭3 4 ♭5 5 ♭7. The minor pentatonic with an added flat 5th, the blue note that gives the blues its bite.
Blues scale: formula 1 ♭3 4 ♭5 5 ♭7. The minor pentatonic with an added flat 5th, the blue note that gives the blues its bite.