A Symbol for The Pearl

Throughout the book, The Pearl, Kino refers to hearing songs in his head. He hears songs that are happy, sad, and songs that are angry. I think that the songs symbolize Kino's emotions, because when he and Juana and Coyotito are trying to get to the city in the North, they are hiding in a cave, and the trackers had set up a camp close to where they were hiding out. One of the trackers hears Coyotito whine, and he shoots his gun in the direction of the sound. The shot killed Coyotito, and Kino started to hear the Song of Anger, or something like that.