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Monday, March 13, 2023

436. MELODIC PHRASES. CYCLES OF 4 DIFFERENT CHORDS WITH 3 HARMONIC TRANSITIONS VERSUS SUCH 4-CYCLES WITH 2 HARMONIC TRANSITIONS. THE TRANSITIONS SQUARE OF THE QUADRUPLE

This post is under the working hypotheses that a melodic phrase Ph (with a complete emotional meaning) has 2 parts and melodic themes symbolized by Mt1  Mt2  and usually  of opposite polarity (increasing -decreasing or vice versa)   such that Mt1 is over a chord transition C1->C2 and Mt2 over another chord transition C3->C4. The quadruplet C1 C2 C3 C4 is the harmony of the melodic phrase.  This quadruplet corresponds also to a pair of lines in 15-syllables poetry (8 syllables for Mt1 and 7 syllables for Mt2).



There are plenty many such quatruples inside a diatonic scale or diatonic chromatic tonality. E.g C1->C2 and C3->C4 may be both harmonic transitions , related by a melodic modulation. 

In such a the quadruple there are 4 direct transitions and  2 more indirect! 

We may prioritize them by the least number of chromatic transitions either direct or indirect. 

We classify such 4-cycles and discuss them below. 

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