A large part of the ontology of music is formalistic and objectivistic: it regards musical works as kinds of objects, whether abstract or concrete, which are to be understood as formal structures. The problem with this view is that this is not enough to explain our musical experience: music is not only heard and understood in terms of objects, facts or structures, but also in terms of events, activities or processes, that take place or occur here and now.
In this paper I will offer a programmatic hint of how musical ontology can accommodate this ordinary intuition. In order to do that, I will take into consideration the practice of musical improvisation. The focus on improvisation, instead of on works, is useful to reshape the discourse of musical ontology in non-formalistic and non-objectivist terms.
