As we can see from the diagram, there are also channels open between the players and the audience. This set of channels is called the external communication system. The need for this system is obvious. Each exchange of signs takes place within one of these systems.
How does music fit into these structures? Music functions as a conduit for communication. In which capacity it works it works is determined by the function of the utterance4.13.
The referential function is one of the most frequent functions of an
utterance. In this case the music is not only used by the speakers as a
means of self-reference but also as a means of reference to some other
outside object, as can be seen in figure 4.2 on
page .
The conative function is associated with the establishment of a channel of
communication. Music is used in different ways in the internal and the
external communication systems, as can be seen in figures 4.3
and 4.4 on pages and
The expressive or emotive function is used to communicate the feelings of
one figure either to another figure or to the public. How music fits within
this kind of speech can be seen in figure 4.5 on
page
The phatic function is employed to keep a channel of communication open. Music is often employed with this function and we can see how it is used in figure 4.6 on page 4.64.14
From this diagrams we can see that normally the dramatis
figuræ are not aware that they are singing. As music is used only to
inform the audience of certain things, it is therefore an excellent
example of what are called epic communication structures.