ACCENT AND REGNANT HARMONY 141 



and ninth-chords may be and are produced on each 

 of the seven diatonics and are incorporated in the 

 Major mode. All these chords also appear in the 

 Minor mode in completely changed relations and 

 with completely transmuted harmonic reports of their 

 components directly caused by the changed relations. 

 In short, a given chord is one thing in Major and 

 quite another thing in Minor, as we shall see. Mean- 

 while we here note that chords like one-voice har- 

 monies fall into two divisions: consonances and 

 dissonances. Each of these two divisions of chords 

 subdivides into two varieties, namely, simple and 

 compound chords. A simple chord is built of the 

 components of one harmony: such are all the chords 

 thus far derived and presented on a previous page. 

 A compound chord is built of the components of two 

 or more harmonies: this variety of chord will be 

 explained in the proper place. In chorded music 

 regnant harmony and byharmony become regnant 

 chord and by chord. The subject of chords is resumed 

 in the next chapter. 



40. The Tone-Region, Its Diatonic Scales 



Each of music's seven octaves repeats the same 

 series or scale of tones, and forms the nucleus of a 

 tone-region. The tones of all regions are connected 

 by their harmonic threads, and the relative pitch of 

 each tone is due to harmonic relation. The seven 

 diatonics constitute the first group of tones that was 

 discovered, expressed and exploited, and the causes 

 and order of their genesis have been explained. The 

 tone-region shows the natural juxtaposition of tones. 



