Different design approaches contributed to what we see today as the prevalent design paradigm for Human Computer Interaction; though they have been mostly applied to the visual aspect of interaction. In this paper we presented a proposal for sound design strategies that can be used in applications involving affective interaction. For testing our approach we propose the sonification of the Affective Diary, a digital diary with focus on emotions, affects, and bodily experience of the user. We applied results from studies in music and emotion to sonic interaction design. This is one of the first attempts introducing different physics-based models for the real-time complete sonification of an interactive user interface in portable devices.