An
octatonic scale is any eight-
note musical scale. The scale most often meant by this term is one in which the notes ascend in alternating intervals of a
whole step and a
half step, creating a
symmetric scale. In classical theory, in contradistinction to jazz theory, this scale is commonly simply called the octatonic scale (or
octatonic collection), although there are forty-two other non-enharmonically equivalent, non-transpositionally equivalent eight-tone sets possible.