A minor scale in music theory is a scale with a scale degree at an interval of a minor third and another interval of a perfect fifth above the tonic. While this definition encompasses modes with the minor third, such as Dorian mode and the Phrygian mode, the term usually refers to the natural minor, harmonic minor, and melodic minor scales, described below, which are in most common use in western classical music (see major and minor). The natural minor scale is the same as the 6th (or Aeolian) mode of the major scale. For example, the white notes of a keyboard give a major scale from C to C. If the notes are played beginning from the sixth step of that scale, which is A, then a natural minor scale (the "relative minor" of C) is heard.