Cadences

Complexity : 2/10 (simple)

Cadences are points of rest - musical punctuations.

There are 4 types of cadences - perfect, imperfect, interrupted, plagal.

Perfect Cadence (full-close): V followed by I. This is the musical equivalent of a full-stop. It should be arranged rhythmically from weak to strong.
Inverted perfect cadences are also possible. V7b-I, V7c-I, V7d-Ib. The last is the most common, but all are good. These can be used for intermediate phrase ends.

Plagal Cadence : This is IV followed by I, and is another form of final cadence. Its rhythm is also weak to strong.

Interrupted (Deceptive) Cadence : This is V followed by VI. It is non-final. It is the musical equivalent of a comma. Musical rhythm may be strong to weak or weak to strong depending on context.

Imperfect Cadence (half-close) : Occurs in various forms, but the second chord must be V. Typically, the progressions in use are
Major : I-V, II-V, IV-V, VI-V, Ib-V, IIb-V, IVb-V
Minor : Same as above. II-V and IIb-V is not available here.
This is a musical semi-colon and is frequently used in the course of a sentence at the end of a subsidiary phrase. The rhythm may be weak to strong or strong to weak based on context.