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Function and Structure of Transitions in Sonata-Form Music of Mozart
Become a member. This organic relationship between parts marks the sonata form as a higher, more complex, type than the ternary form. The occasional designation of sonata form as compound binary form is useful in that it stresses its origins in the earlier form, but notes its added complexity.
The emphasis on contrast, even conflict, is the element that distinguishes the exposition of a sonata-form movement from the first section of an earlier binary form. The first section of a binary movement in a Baroque suite or instrumental sonata , for example, might contain two clearly differentiated themes , but the stress is on continuity and on uniformity of musical texture rather than on contrast.
Sonata Form in Minor Keys - Oxford Scholarship
In sonata form the emphasis is more dynamic; there is a stronger sense of contrast within the movement. In reality it is contrast of key, or tonal contrast, that characterizes the sonata-form exposition.
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The later segments of the exposition move decisively to a closely related but distinct key. The second key chosen is almost invariably one of the two keys most closely related to the home key. If the home key is a major key, the dominant key is chosen; if the home key is minor, the relative major is chosen.
The dominant key is the one whose keynote is five tones above that of the tonic, as C—G; the relative major has a keynote three tones above the relative minor, as A minor—C major. The exposition thus creates an opposition of tonalities or key areas that the rest of the movement—the development and recapitulation—will strive to reconcile. Compared with the contrast of keys, the question of how many themes the movement possesses is of minor structural significance.
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The thematic organization of a movement in sonata form may affect the character of the exposition, and thus of the whole movement, in two specific respects. When two themes or groups of themes are clearly differentiated, their distribution may help the listener to assimilate the cardinal points of the tonal design that is, the arrangement of keys of the movement.
When, on the other hand, such differentiation between themes is obscured or set at variance with the organization of tonalities, the very tension between thematic design and tonal scheme may greatly enhance the subtlety and interest of the form. Such tension may produce not merely an interplay of melody and key within the movement but an interplay between two interplays. Here, as in Symphony No. This restatement could appear at first to be the second subject.
But later it is followed by another distinct motive that, in terms of themes, is the real second subject. At the same time the neat, almost epigrammatic character of the second subject makes it similar to a codetta theme, which is often used to round off the exposition after both main subjects have been stated.
The second theme is thus heard as a new perspective on the tonic. Later, when the dominant key is firmly established in its own right, Mozart introduces a new subject whose tune is closely related to the first theme. In this richly ambiguous structure, the newly introduced motive would be regarded by the criterion of key, as the second subject; in purely thematic terms, it might almost be said to constitute the beginning of the codetta, or concluding section. Sonata form. Info Print Print. Table Of Contents. Submit Feedback. Thank you for your feedback.