Asymmetrical periods are musical phrases or sections that do not have equal lengths for their antecedent (first half) and consequent (second half). They create an unbalanced feeling in the music, adding tension or surprise.
Related terms
Symmetrical Periods: Symmetrical periods are musical phrases with equal lengths for their antecedent and consequent parts. They provide balance and predictability in music.
Phrase Structure: Phrase structure refers to how musical ideas are organized into smaller units called phrases. These phrases can be symmetrical or asymmetrical, contributing to the overall structure of a piece.
Cadence: A cadence is a musical progression that marks the end of a phrase or section. It provides a sense of resolution and closure. The placement of cadences can be influenced by the symmetry or asymmetry of the surrounding musical material.