Tones in a Half-Whole Diminished Scale : Root, Minor 2nd (m2), Minor 3rd (m3), Major 3rd (M3), Tritone, Perfect 5th (P5), Major 6th (M6), Dominant 7th (d7),
An octatonic scale is any eight-note musical scale. However, the term most often refers to the symmetric scale composed of alternating whole and half steps, as shown at right. In classical theory (in contrast to jazz theory), this scale is commonly called the octatonic scale (or the octatonic collection), although there are a total of 42 enharmonically non-equivalent, transpositionally non-equivalent eight-note sets.
