3rd position

The first eight bars follow the standard 12 Bar Blues progression. In bars 9 and 10 where we expect a V7 to iv chord (it's common for a minor blues to have a major V chord), in this song it's a bVI (flat six chord) to V7. In 2nd Position (E Harmonica) this chromatically descending chord progression (by half step) works out well as 2 to 2', 3' to 3" or 3' to 4+. In 3rd Position (A Harmonica) 3' to 3", 4 to 4', 5 to 5+ (and its octave equivalent 2" to 2+) or 2" 2 (and 5 6+) works well. Experiment with these to see which sounds best to you.

What you found yesterday was that the notes were the same between the two positions. This is another way of looking at how positions work... simply find the same notes on any other harmonica and you are playing in a "position." Look at the C harmonica now and figure out how to play this hook in 1st Position.

I7 = 2 2" 2 = C Bb C

IV7 = 4+ 3' 4+ = F Eb F

V7 = 4 4+ 4 = G F G

Or on your Bb Harmonica in 3rd Position...

I7 = 4 4+ 4 = C Bb C

IV7 = 6+ 5 6+ = F Eb F

V7 = 6 6+ 6 = G F G