Book excerpt: In this audacious book, Ana María Ochoa Gautier explores how listening has been central to the production of notions of language, music, voice, and sound that determine the politics of life. Drawing primarily from nineteenth-century Colombian sources, Ochoa Gautier locates sounds produced by different living entities at the juncture of the human and nonhuman. Her "acoustically tuned" analysis of a wide array of texts reveals multiple debates on the nature of the aural. These discussions were central to a politics of the voice harnessed in the service of the production of different notions of personhood and belonging. In Ochoa Gautier's groundbreaking work, Latin America and the Caribbean emerge as a historical site where the politics of life and the politics of expression inextricably entangle the musical and the linguistic, knowledge and the sensorial.