A rhythmic cadence is a characteristic rhythmic pattern that indicates the end of a phrase. A cadence is labelled more or less “weak” or “strong” depending on its sense of finality. While cadences are usually classified by specific chord or melodic progressions, the use of such progressions does not necessarily constitute a cadence—there must be a sense of closure, as at the end analyzing classical form caplin pdf a phrase. Harmonic rhythm plays an important part in determining where a cadence occurs.
Cadences are strong indicators of the tonic or central pitch of a passage or piece. Edward Lowinsky proposed that the cadence was the “cradle of tonality”. In music of the common practice period, cadences are divided into four types according to their harmonic progression: authentic, plagal, half, and deceptive. Typically, phrases end on authentic or half cadences, and the terms plagal and deceptive refer to motion that avoids or follows a phrase-ending cadence.
A seventh above the root is often added to create V7. The Harvard Concise Dictionary of Music and Musicians says, “This cadence is a microcosm of the tonal system, and is the most direct means of establishing a pitch as tonic. It is virtually obligatory as the final structural cadence of a tonal work”. A perfect cadence is a progression from V to I in major keys, and V to i in minor keys.