Taking multigenerational communities of South Los Angeles musicians as case studies, this article extends Kevin Quashie’s formulation of “black aliveness” from literary study to music study to help make sense of the perceived historical contiguity of race and genre in Black musics. Black aliveness names an ecology of being evidenced in expressive practices conditioned by—but not foreclosed upon—the outcomes of anti-Black racism in the US. This poetics of relation may be understood as the ontopoetic condition of possibility for analyses of formal structure, historiographies, or performative strategies. Participating in the discourse related to Afropessimism, black aliveness responds to the claims of an overdetermined racialized necropolitics. Rather than objectifying persons racialized as Black, this approach considers the socially distributed apparatus that produces and animates the concept of “blackness” as much as its boundless modes of expression. Beginning with the Central Avenue scene of the mid-twentieth century and moving to South Central Los Angeles, this article draws connections between communitarian art ecologies of the Pan Afrikan Peoples Arkestra, the Watts Prophets, the Multi-School Jazz Band, and contemporary genre-expanding artists Thundercat, Terrace Martin, and Kamasi Washington. Building upon insights related to the aesthetic figuring of race and genre from Black Studies, black aliveness is a relational mode of being-as-becoming that demonstrates the necessity for studies of raced music to consider intrapersonal poetics as much as the social, cultural, and ideological.