In this article I consider the relationship between natural sounds and music. I evaluate two prominent accounts of this relationship. These accounts satisfy an important condition, the difference condition: musical sounds are different from natural sounds. However, they fail to meet an equally important condition, the interaction condition: musical sounds and natural sounds can interact in aesthetically important ways to create unified aesthetic objects. I then propose an alternative account of the relationship between natural sounds and music that meets both (...) conditions. I argue that natural sounds are distinct from music in that they express a kind of alterity or “otherness,” which occurs in two ways. It occurs referentially, because the sources of natural sounds are natural objects rather than artifactual objects, such as instruments; it also occurs acoustically, because natural sounds tend to contain more microtones than macrotones. On my account, the distinction between music and natural sounds is both conventional and vague; it therefore allows music and natural sounds to come together. (shrink)