This occurs in subsections, preliminary endings, contrasting additions of subordinate themes, connecting passages with the purpose of co-ordination and subordination, transitions, and in modulatory sections of scherzos, sonatas, symphonies, etc.
Unfortunately some of the harmonies cannot be “registered” in two regions; this, at least theoretically, would justify their exclusion [from an example which does not modulate].
REMOTELY RELATED INTERMEDIATE REGIONS
The connection of regions which have no common harmonies, such as v (in C major, g) and SM (A) or bSM (Ab), dor (d) and M (E) or bM (Eb), and m (e) or M (E) and SD (F) or sd (f) offers difficulties. Their relation to the main tonality might be indirect but not remote, in spite of which their relation to one another can be as irreconcilably remote as, for instance, that of bM or bm with sm or SM.
共通ハーモニーのない領域との接続は困難さがある。例えばv領域(in C majorであればGmキー)とSM領域(同じくAキー)もしくはbSM領域(Ab領域)、
The preceding statement may be generalized as follows:
Regions, and even tonalities, whose tonics differ a major or minor second or augmented fourth (diminished fifth) have so little in common that it would seem justifiable to consider them as ” irreconcilably remote”, were it not that the imagination of a real artist is capable of overcoming even this obstacle. On the other hand, one should not forget that the progres- sions of the Neapolitan sixth chord to the tonic chord,
Ⅱ-I [or i], and to the dominant chord, II-V [i.e. progressions of a minor second or augmented fourth] are common.