Fri Dec 14 20:07:26 EST 2018
Blues harp subverts the intention of this design with what is "perhaps
the most striking example in all music of a thoroughly idiomatic
technique that flatly contradicts everything that the instrument was
This is because by playing the C harmonica in G, or A harmonica in E,
the dominant or seventh chord is produced in place of the tonic chord,
and in the blues, all chords are typically played as dominant (seventh
or ninth) chords.