the blues scales are.scale down 6 (5) (4) (4b) 4 (3b) (2) up (2) (3b) 4 (4b) (4) (5) 6which is second position.and in third position the notes are. up (4) 4 (3b) (3 (2) (2b) (1) down (1) (2b) (2) (3 (3b) 4 (4).
Blues scale is a selection of notes in a Key that have a Bluesy sound, They would be mostly Notes at the lower end of the Diatonic harp which would include bends to, They can also be moved 1 octave up on the harp to the higher end.