Arch Form
拱形曲式
「拱形曲式」（Arch Form 或 ABCBA Form）是音樂中的一種作曲結構，通過將音樂素材排列成一種鏡像自身的方式，創造出一種平衡而對稱的模式。在「拱形曲式」中，音樂內容從一個初始點進行發展，達到高潮，然後再返回，通常帶有變化，回到類似開始的點，營造出一種完成感。
「拱形曲式」通常用來在作曲中創造出一種統一感和平衡感，通過將其結構化為自身的倒影。
「拱形曲式」的結構可以表示為「ABCBA」，其中：
- A 部分介紹初始的音樂素材。
- B 部分作為對 A 部分中引入的主題的對比發展或擴展，引導到高潮。
- C 部分是作品的高潮，通常是情感的頂峰或最高張力點。
- 回到 B 部分，可能包括對早期呈現的主題的變化或發展。
- 回到 A 部分或其變體來結束，創造出一種令人感到完滿的循環結構。
「拱形曲式」可以在各種音樂流派和風格中找到。作曲家使用這種結構來創造一種平衡感和釋放感，因為在探索對比的主題和情感之後，作品回到了其開始的材料。
「拱形曲式」提供了一種獨特的方式來結構化作品，允許主題的發展、對比以及循環的音樂統一感。這是作曲家創作作品的工具，使作品既具有探索性又具有令人感到完滿的釋放感。
影片：Arch Form
Vienna Philharmonic – Barber: Adagio for Strings, Op.11 (Summer Night Concert 2019)
音樂術語資訊
詞彙類別
相關術語
導師影片（Anna Vienna Ho）
導師簡介
音樂文章
G Song by Terry Riley
As an iconic American composer, Terry Riley (born 1935) is always considered as a minimalist. However, this kind of thoughts would be ignoring part of his creativity. In fact, Riley added plenty elements in his compositions since 1970s, especially when he started collaborating with the Kronos Quartet. Riley’s composing style is very extensive, including improvisation, polyrhythm and jazz. He adopted classical elements, such as instrumentation, musical forms, structure and tonality. He also combined the elements from different periods to create unique musical textures. This research focuses on Terry Riley’s String Quartet, G Song. The research will be divided into two parts. The first part introduces Riley’s life and the background of G Song. The second part focuses on music analysis, including the musical structure “Two forms in one work”; The harmony “Unresolved Dissonance”; The rhythm “Metric Modulation”; The baroque “Canon”; The modern “Pointillism”. The purpose of this study is to discuss how Riley combined classicism and modernism into a work, and discuss why the statement “Terry Riley is considered as minimalist” would be ignoring part of his story.
