Symphony is a musical composition written for an orchestra. It is a complete work, in which, according to Asafiev, all the elements are as one and none of them can serve as individual, independent pieces. A composer uses an orchestra similarly to how an artist uses a palette: the diverse range of different tools allows them to concentrate on precise expression of feelings, ideas and characters.
When it comes to symphonic ballet, the dance submits to the music and follows it: a choreographer considers the tempo and the key, as well as the emotional and thematic aspects of the musical composition. The dance may also only follow the structure of the musical foundation because the choreographer is not bound to address the exact same topics and problems as the composer. There only exists one main rule – to harmonize the music and the dance, and for that purpose ballet masters may complement, enrich or deepen the compositions.