什麼是奏鳴曲式

大多是在第一個樂章以及通常在如交響曲（symphony）、協奏曲、絃樂四重奏，及奏鳴曲等音樂作品型別中之其他樂章中的表現形式。奏鳴曲形式是由兩部分形式，如：通常每一個部分都會重複之巴洛克式組曲的舞曲演變而成。第二部分一開始傾向於類似第一部分但調的順序顛倒，並漸漸的增加而成為具重要份量的三部分形式。第一部分或一開始的闡述表現出通常分成兩個主旋律群之基本主旋律的樂章，而第二部分則屬調或是--如果該樂章屬小調--相對屬較大調。第二章節或接著的發展通常在前面的旋律較為自由，常常會變換各種不同的調。當返回主音調並且所有的主旋律在主音中重複時，這將引匯出最後的章節或奏鳴曲形式的再現部。奏鳴曲形式在從大約1970年到最近的二十世紀的西方藝術音樂中，是器樂曲中最常見的形式。

sonata form

Form of most first movements and often other movements in such musical genres as the symphony, concerto, string quartet, and sonata. Sonata form evolved from two-part forms such as the dances of the baroque suite, each of whose parts was generally repeated. The second part, which initially tended to resemble the first part but reversed the order of its keys, gradually grew in size to become, in important respects, a three-part form. The first part, or exposition, presents the basic thematic material of the movement, which is often divided into two thematic groups, the second being in the dominant key or-if the movement is in a minor key-in the relative major key. The second section, or development, generally treats the earlier themes freely, often moving to various different keys. It leads to the final section, or recapitulation, when the tonic key returns and all the thematic material is repeated in the tonic. Sonata form was the most common form for instrumental works in Western art music from c. 1760 to the early 20th century.