Form.-

Whereas the majority of popular styles lend themselves to the song form, classical music can also take on the form of the concerto, symphony, sonata, opera, dance music, suite,étude, symphonic poem, and others.

Classical composers often aspire to imbue their music with a very complex relationship between its affective (emotional) content and the intellectual means by which it is achieved. Many of the most esteemed works of classical music make use of musical development, the process by which a musical idea or motif is repeated in different contexts or in altered form. Thesonata form and fugue employ rigorous forms of musical development.