- H.K. Andrews
A scale that divides the octave into six equal-tempered whole tones: C–D–E–F♯–G♯–A♯(=B♭)–C or its sole transposition, D♭–E♭–F–G–A–B(=C♭)–D♭. Since all the intervals between adjacent degrees are the same, the scale is tonally unstable, that is, a centre can be formed only by emphasizing one of its notes to give it artificial prominence. Moreover, it lacks the fundamental harmonic and melodic relationships of major–minor tonality, namely those of the dominant (perfect 5th) and the leading note (minor 2nd)....