Polyphony

Definition and stakes

Portrait of W. S. B. Mathews W. S. B. Mathews,  A Popular History of the Art of Music

“ In a true polyphony not only has every tone of the leading voice a melodic character, but all the tones which sound together with it are themselves elements of other and independently moving melodies. Polyphony comprehends the most recondite elements of musical theory, but its essence consists of one leading concept—that of canonic imitation. The simplest form of this is furnished by that musical [Pg 150] construction known as "round," in which one voice leads off with a phrase, and immediately a second voice begins with the same melodic idea at the same pitch, and follows after. ”
Source: Gutenberg

Various,  The Art of Music - Vol. 7 (of 14… (1915)

“ Out of all the confusion and uncertainty attendant upon the breaking up of the old art of vocal polyphony, the enthusiasm of the new opera, the creation of a new harmonic system, the rise of an instrumental music independent of words, these men slowly and steadily secured for the harpsichord a kingdom peculiarly its own. ”
Source: Gutenberg

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