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Ternary Form Music Definition Essay

Form Analysis

Label the phrase structure for the theme below. Indicate the smaller 'sub' structures and label the cadence(s).

Example 1

Solution


Example 2

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Example 3

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Example 4

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Small Forms - Samples

For the examples below determine the formal structure. Show formal divisions, key relationships, and structural cadences.

Example 1

Solution


Example 2

Solution


Ternary Form

A musical structure where the piece is divided into 3 distinct sections. The 1st and last sections are exactly the same as each other and so the form can be written A – B – A as below:

Each of the sections sound like complete pieces of music in themselves – you could play just the A Section of a Ternary Form piece and it would not “feel” like it must continue onto a new section. This is because it ends on a perfect/authentic cadence.
The B Section is usually written in a key that is closely related to the key of the A Section as below:

The B section also usually has a different mood to the A Section. If the A Section is upbeat and lively then the B Section will often be more subdued.
Have a look/listen to this famous example of Ternary Form – “Alla Hornpipe” by Handel from The Water Music.

      Play Ternary Form Example Example

Compound Ternary Form

This is when each of the sections (A-B-A) are subdivided into a clear Ternary Form structure as in the diagram below. Examples of Compound Ternary Form include trios and minuets.

Composing in Ternary Form

Ternary Form is a great structure to compose in because the repeated A Section gives your piece a sense of unity and balance which you don’t quite get in Binary Form. The contrasting B section will also help focus you to create fresh ideas and bring variety to your composition.
I would suggest writing an A Section (you may have already written a piece of music that would work well as an A Section in a Ternary Form piece).
Once you have finished your A Section try writing a new section, but use the different keys suggested in the Ternary Form diagram above.
Good luck!

Click Here for Music Structures Lesson 4 on Rondo Form.