The wordless, often unwritable sound of the vox confusa is usually contrasted with the verbal, writeable sound of the vox articulata. The former was held to be irrational and meaningless; the latter, rational and significant. This chapter will examine the role which the vox confusa played in Augustine’s thought. It will argue that, in his later works, we encounter a wild(er) Augustine who appears to be more willing than his earlier self to recognise and exploit the vox confusa in a theological context.