Notes: C, E, and G# - Key: C - Category: Tetratonic Scales
The C Four Semitone II uses four notes per octave. Because of this same reason it is a member of the so called Tetratonic -scales that have Four-note (or Four-tone). On the piano keyboard, it is made up of one black keys: G# and two white keys: C, and E. 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 Four Semitone II Scale we can find it has no flats and one sharps. Therefore, on sheet music you will find one accidentals on the score. The notes of this scale are: C, E, and G#.