Notes: C, D, Eb, F#, G, A, and B - Key: C - Category: Octatonic Scales
The C Lydian Diminished 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 two black keys: Eb, and F# and five white keys: C, D, G, A, and B. 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 Lydian Diminished Scale we can find it has one flats and one sharps. Therefore, on sheet music you will find two accidentals on the score. The notes of this scale are: C, D, Eb, F#, G, A, and B.