Notes: C, D, Eb, E, F, Gb, G, A, and Bb - Key: C - Origin: African - Category: Decatonic Scales
The C Blues Nine-Note uses ten notes per octave. Because of this same reason it is a member of the so called Decatonic -scales that have Ten-note (or Ten-tone). On the piano keyboard, it is made up of three black keys: Eb, Gb, and Bb and six white keys: C, D, E, F, G, and A. This combination makes this scale - as well as the C Blues Enneatonic, C Blues Heptatonic, and C Blues Hexatonic - as great choices for composing or improvising African music.
If we take a look a the key signature of the C Blues Nine-Note Scale we can find it has three flats and no sharps. Therefore, on sheet music you will find three accidentals on the score. The notes of this scale are: C, D, Eb, E, F, Gb, G, A, and Bb.