|Ternary Form (ABA form)||Theory Things William Wieland|
Sectional or Closed Ternary (A ends on tonic.)
Both A B A and A B A' are common. Da capo arias are in ternary form.
Repeat signs may occur, frequently ||: A :||: B A :||
Though A A' A'' and A B C each include three sections, A A' A'' features no contrasting middle section and A B C does not recapitulate the opening material.
Compound ternary is a three-part form in which each section is itself a binary or ternary form. Common examples include Minuet and Trio or Scherzo and Trio movements.