Structuralist approach to music, literature, and art

Probably there is nothing more than that in the structuralist approach;

it is the quest for the invariant, or for the invariant elements among superficial differences. […] to try to express in one language, that is, the language of graphic arts and painting, something which also exists in music and in the libretto; that is, to try to reach the invariant property of a very complex set of codes ( the musical code, the literary code, the artistic code). The problem is to find what is common to all of them.(Lévi-Strauss, Myth and Meaning 8-9)