And a codetta or coda is sometimes added to the whole.
The Song with Trio is thus seen to correspond to the Three-Part Song-form, upon a larger scale.

The several _Parts_ of the latter become complete _Song-forms_.

An important distinction, to which especial attention must be directed, is the _completeness_ of the contents of each song-form, and their fairly distinct _separation_ from each other, in the Song with Trio.

The significance of these traits will become apparent to the analytic student, as he progresses along the line of form-evolution into the still larger designs.
LESSON 12 .-- The following examples all belong to the Song with Trio.
They should be analyzed as usual, each Song separately, defining the Parts, their form, and other details, as minutely as possible.

Careful analysis is the first condition of intelligent interpretation; and the more complete the analysis, the fuller and more authoritative the interpretation:-- Beethoven, pianoforte sonatas: op.