Authentic Cadence
完全終止
「完全終止」（Authentic Cadence 或 Perfect Cadence）是音樂理論中的一種音程，用來描述一種特定的和聲進行，常被視為音樂句子的結束。它通常由 V 和 I 和弦組成，即屬音階中的第五和第一和弦。這種終止創造了一種確定性和結束感，使音樂段落達到一個自然的結尾點。
完全終止是一種典型的和聲進行，具有穩定性和平衡性。它通常發生在音樂的重要轉折點或結尾處，為聽眾提供了一種感覺，表明音樂段落已經完整結束。在完全終止中，第五級和弦（V 和弦）具有強烈的張力，而第一級和弦（I 和弦）則呈現出一種釋放的感覺，這種對比創造了一種引人入勝的和聲轉換。
例如，在 C 大調中，完全終止會涉及到 G 和弦（第五和弦）到 C 和弦（第一和弦）的轉變。這種和弦進行的組合通常被用來結束樂曲的部分，表達一種情感的結束或一個段落的完結。
完全終止是音樂創作和分析中的重要概念，它不僅僅是音樂的技術元素，還能影響音樂的情感和情感表達。它與其他和聲進行一起，幫助創造出多樣性的音樂結構，並為聽眾提供引人入勝的和聲變化。
影片：Authentic Cadence
The Perfect Music Cadence - Music Theory Crash Course
音樂術語資訊
詞彙類別
相關術語
導師影片（Miss Christy）
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.
