What does the term "compound musical form" specifically refer to?

The term "compound musical form" specifically refers to a tonal work that is made up of other smaller forms. In music, this concept is significant because it highlights how larger compositions can be constructed from smaller, distinct musical sections or forms, such as themes, variations, or movements. This structure allows composers to create complex works that maintain coherence while integrating various musical ideas throughout the piece.

For example, in a sonata or a symphony, you often find multiple movements that can each be considered their own musical forms, yet when combined, they create a larger, unified work. This approach not only provides diversity within the composition but also allows for exploration of different themes and ideas within a structured framework. Each smaller form contributes to the overall narrative or emotional journey of the piece, illustrating how interconnected musical expressions can coexist within a broader structure.