Step 4: For an F blues scale, we need one last tweak: a sharpened fourth degree. This means we take the fourth degree of the scale, raise it in pitch by one semitone and add this note to the scale.

Blues. Take a minor pentatonic scale and add an extra note - the sharpened 4th degree - to get the blues scale. The C blues scale, therefore, goes C Eb F F# G Bb. Although you can play a standard ...