motive of which

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is presented in every phase of modulatory and rhythmic development, and the middle portion of the Reconnaissance from Schumann's Carnaval (see Supplement, Example No. 4.)

Music, just because its substance is so elusive and requires such alert attention on the part of the listener, cannot continually present new material[17] without becoming diffuse; but instead, must make its impression by varied emphasis upon the main thought. Otherwise it would become so discursive that one could not possibly follow it. From these historical facts as to the structure of music certain inferences may be drawn; the vital importance of which to the listener can hardly be exaggerated. As polyphonic treatment (the imitation and interweaving of independent melodic lines) is the foundation of any large work of music, be it symphony, symphonic poem or string quartet, so the listener must acquire what may be called a polyphonic ear. For with the majority of listeners, the whole difficulty and the cause of their dissatisfaction with so-called "classic music" is merely lack of equipment. Everyone can hear the tune in the soprano or upper voice, for the intensity of pitch makes it stand out with telling effect; and, as a fact, many of the best tunes in musical literature are so placed. But how about the tune when it is in the bass as is the case so frequently in Beethoven's Symphonies or in Wagner's Operas? Some of the most eloquent parts of the musical message are, indeed, often in the bass, the foundation voice, and yet these are entirely ignored by the average listener. Then what of the inner voices; and what—most important of all—when there are beautiful melodies in all parts of the musical fabric, often sounding simultaneously, as in such well-known works as César Franck's Symphony in D minor and Wagner's Prelude to the Mastersingers! As we face these questions squarely the need for the listener of special training in alertness and concentration is self-evident. A very small proportion of those who attend a symphony concert begin to get their money's worth—to put the matter on a perfectly practical plane—for at least 50% of the musical structure is presented to ears without capacity for receiving it. In regard to any work of large dimensions the final test is this: can we sing all the themes and follow them in their polyphonic development? Then only are we really acquainted with the work; then only, in regard to personal like or dislike, have we any right to pass judgment upon it. The absurd attitude, far too common, of hasty, ill-considered criticism is illustrated by the fact that while Brahms is said to have worked for ten years on that Titanic creation, his First Symphony, yet persons will hear it once and have the audacity to say they do not like it. As well stroll through Chartres Cathedral and say they did not think much of it!

We must now speak of the two other manifestations of the principle of repetition. Fundamentally, to be sure, they are not connected with polyphonic music; the third type, in fact,—restatement after contrast—being instinctively worked out in the Folk-Song (as will be made plain later) and definitely ratified as a structural principle by the Italian opera composer Alessandro Scarlatti in the well-known Aria da capo. These further applications of the principle of imitation are Transposition, i.e., the repetition of the melodic outline, and often of the whole harmonic fabric, by shifting it up or down the scale; and the Restatement of the original melody after an intervening part in contrast, thus making a piece of music, the formula for which may be indicated by A, B, Á. Anyone at all familiar with musical literature must have observed both of these devices for securing coherence and organic unity; in fact, the principle of restatement after contrast is at the foundation of any large work, and supplies the connecting link between the structure of the Folk-Song and that of the most elaborate modern music. A convincing illustration of the use of Transposition may be found in Schumann's Arabesque,

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and in the opening theme of Beethoven's Waldstein Sonata, op. 53.

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It was a favorite device of Beethoven to impress the main theme upon the hearer by definite repetitions on various degrees of the scale.[18] For an elaborate example of Transposition nothing can surpass the opening movement of César Franck's D Minor Symphony, the entire first part of which consists of a literal repetition in F minor of what has been previously announced in D minor.

Pieces of music which embody the principle of Restatement after Contrast are so numerous that the question is merely one of selecting the clearest examples. In the Folk-Songs of every nation, as soon as they had passed beyond the stage of a monotonous reiteration of some phrase which pleased the fancy, e.g.

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we find hardly one in which there is not a similarity between the closing measures and something which had gone before. (See Supplement, Example No. 5.) For the most elementary artistic experience would establish the fact that the only way to avoid a monotonous repetition of the same theme is to change to a different one. And the next step is equally axiomatic—that, presupposing the first theme gives pleasure on its initial appearance, it will be heard with heightened pleasure at its reappearance after intervening contrast. A psychological principle is herein involved which cannot be proved but which is self-justified by its own reasonableness and is further exemplified by many experiences in daily life. Sweet things taste the sweeter after a contrast with something acid; we like to revisit old scenes and to return home after a vacation. No delight is keener than the renewal of some aesthetic experience after its temporary effacement through a change of appeal.