The Sonata-allegro Form


As distinguished from the sonatine-form, with

its two Divisions, this larger species, based upon precisely the same

structural idea, has three Divisions,--the Exposition, a middle

Division called the Development (growing out of the brief interlude of

the sonatine-form), and the Recapitulation. The diagram (the keys of

which correspond to the plan of Beethoven, op. 14, No. 2, first

movement) is as follows:



Exposition. Middle Div. Recapitulation.

---------------------- ------------- -------------------------

Pr. Sub. Codetta. Development, Phr. Sub. Codetta

Th. Th. various keys, Th. Th. and Coda.

---------------------- ending with -------------------------

G maj. D maj. D maj. Retransition. G maj. G maj. G maj.





Compare this diagram, also, with that of the Third Rondo-form, and

note, accurately, the points of resemblance and contrast.



Compare it, further, with the diagram of the sonatine-form, on page

122. It will be observed that here the Recapitulation does not follow

the Exposition at once, as there, but that a complete middle division

intervenes, instead of the brief interlude or re-transition; from which

the student may conclude that the sonatine-form gradually grows into

the sonata-allegro form, as this interlude becomes longer, more

elaborate, and more like an independent division of the design. Or

inversely, and perhaps more correctly, the sonata-allegro becomes a

sonatine-design by the omission (or contraction) of the middle

Division.



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