== Diatonic ==
definition (not totally accurate ) generally given is that the white keys on a keyboard are the diatonics.
Diatonics are the predominate note scales used in modern Western music. Modern performers (especially in most forms of popular music today) have a tendency to conform their music into these scales. The eight diatonic notes of an octave in the key of C major indeed correspond to the white notes of a piano or organ keyboard from one C to the next C.