Subjective experiences of autistic adults remain under-researched, especially in the field of art. To learn more about their uses and functions of music, we interviewed 13 autistic adults and through a hermeneutic-phenomenological analysis found four overarching themes: Well-being, Identity and self-development, Connectedness, and Negative experiences. Findings show a broad and deep meaning of music in their lives, spanning from seemingly trivial functions such as making chores more enjoyable, to existential questions, such as choosing to stay alive. We discuss the often-overlooked negative effects or experiences of music, noting that positive and negative effects must always be addressed together if we are to use music to lower stress and support well-being.