major scale may be used in any system of meantone tuning, such as 19 equal temperament or 31 equal temperament, as well as 12 equal temperament. One interesting property of this scale is that for any diatonic scale, there is a relative major or minor mode, and if each of these is made harmonic major or harmonic minor, the accidental required in each "harmonic" scale is actually the same note spelled enharmonically. For example, the added accidental in C harmonic major, A (shown in first image), is enharmonically equivalent to the added accidental, G, in the relative harmonic minor of C major, A harmonic minor. Also, another enharmonic mode of the scale is the Jazz Minor b5 scale (Jeths's mode) (B in C Harmonic Major, Cb in F Jazz Minor b5). Like the familiar major, melodic minor, and harmonic minor scales, the harmonic major scale has the diatonic thirds property, which means that the interval between notes two steps apart (e.g. the second and fourth note, or the third and fifth note, etc..) are separated by a major or minor third, i.e. the interval of three or four semitones. There are only seven such scales in equal temperament, including whole tone, hexatonic from alternating minor thirds and semitones, diatonic, ascending melodic minor, harmonic minor, harmonic major, and octatonic (diminished). This property implies that chords formed by taking every other note from some consecutive subset of the scale are triadic, raising the possibility of using tertian harmony together with melodic material from such a scale. The harmonic major scale is also one of the five proper seven-note scales of equal temperament. Like five of those other six scales, it is a complete circle of thirds; starting from the tonic the pattern is MmmmMMm, where M is a major third and m is a minor third. Harmonic major is not commonly taught as a tonality, so chords borrowed from this diatonic tonality are not recognized as readily as those from the tonalities of major, harmonic minor, and melodic minor. Many popular songs have borrowed chords from the tonality of harmonic major but have not been recognized as doing so. Examples are 'After You've Gone', 'Blackbird', 'Sleep Walk', 'Dream A Little Dream Of Me'. References Further reading Peter Burt, The Music of Toru Takemitsu, Cambridge University Press, 2001, . Hewitt, Michael. 2013. Musical Scales of the World. The Note Tree. . Nikolai Rimsky-Korsakov,