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The Tune 85 |
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In the above illustration notice the structure of the first period, phrase I ending with an imperfect cadence, phrase II starting as if to form a parallel period, then, with details of added interest, proceeding to modulate to the domiĀnant. The second period starts in the dominant, with a new figure forming a two-measure section answered by two more measures with a semicadence. Phrase II here is suggested by phrase II of the first period, the resemĀblance becoming closer as the final cadence approaches.
The above is a specimen of the simplest two-part structure, and should be carefully studied.
The next step is to consider three-part form. In this the first period has a full close in the tonic; the second gives a complete contrast; the third reproduces the first, with or without unessential variations. |
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