The composer's musical language and interpretation of the text often dictate the formal design of an art song. If all of the poem's verses are sung to the same music, the song is strophic. Arrangements of folk songs are often strophic, and "there are exceptional cases in which the musical repetition provides dramatic irony for the changing text, or where an almost hypnotic monotony is desired." Several of the songs in Schubert's Die schöne Müllerin are good examples of this. If the vocal melody remains the same but the accompaniment changes under it for each verse, the piece is called a "modified strophic" song. In contrast, songs in which "each section of the text receives fresh music" are called through-composed. Most through-composed works have some repetition of musical material in them. Many art songs use some version of the ABA form (also known as "song form" or "ternary form"), with a beginning musical section, a contrasting middle section, and a return to the first section's music. In some cases, in the return to the first section's music, the composer may make minor changes.
