Notes: C, Db, Eb, F, G, Ab, and Bb - Key: C - Category: Octatonic Scales
The C Phrygian uses eight notes per octave. Because of this same reason it is a member of the so called Octatonic -scales that have Eight-note (or Eight-tone). On the piano keyboard, it is made up of four black keys: Db, Eb, Ab, and Bb and three white keys: C, F, and G. This combination makes this scale - as well as the C Prometheus, C Prometheus Liszt, and C Prometheus Neapolitan - as great choices for composing or improvising music.
If we take a look a the key signature of the C Phrygian Scale we can find it has four flats and no sharps. Therefore, on sheet music you will find four accidentals on the score. The notes of this scale are: C, Db, Eb, F, G, Ab, and Bb.