From this description it may be seen that melody is formed from an hierarchical layering of small pitch units that recombine to form larger units of the whole melody. Repetition plays an important role in the building of melodies and, indeed, in the building of all musical structures. Language is the medium by which both spoken and written concrete and abstract aspects of reality are communicated. Music is the medium by which pitches are arranged according to parameters of duration, amplitude and timbre.
Pure music communicates non-literal and abstract sounds.
When text is combined with music, or when music accompanies visual action in cinema or opera, pure music is able to participate vicariously in a literal dimension. However, pure music's essential realm of communication is one of abstract relationships of sounds to each other with no attachments to literary meanings. The subject matter of pure music is melody . Melody is the idea of music. In Western music melody is supported by all of the other basic elements of music meter, rhythm, harmony, dynamics and timbre.