The communication of emotions is crucial to social relationships and plays a fundamental role in maintaining the social order between people. In this chapter we are looking at the communication of emotions through two expressive modalities that make use of sound as a mean of communication, i.e. speech and singing. Throughout the text we argue in favor of the idea that the vocal expression of emotions reflects physiological aspects associated to the emotion itself that is expressed; that there are many similarities between the expressive patterns found in speech and in singing; and that the singing is expressive bacause it has traces of expressive patterns of speech.