The article builds a theoretical framework to explain the functioning of moral sentiments as skills in Mozart’s concerto dialogue in piano concerto K. 466 first movement. Key elements of the model are the relation of emotional contagion and moral choice, and how the relation is realized in the concerto. The relation is founded on the concept of inner experience that has a major role in understanding the dialogical process based on an exchange between Humean ideas and expressions. The model culminates in a three-dimensional model that maps the five-stage skill-acquisition process, highlighting how the development of these skills in learning the concerto is influenced by various factors. The most central of these are emotional factors (moral sentiments) and rational factors (music analytical explanation). The primary conclusion is that morality is integral to both explanatory approaches in music analysis, reflecting its dual nature as being grounded in both rationality and sentimentalism in moral theory. Morality and its ability to tackle performance related questions has become part of music analysis.