Abstract Sounds, Ecologies, Musics poses exciting challenges and provides fresh opportunities for scholars, scientists, environmental activists, musicians, and listeners to consider music and sound from ecological standpoints. In times of mounting human and planetary crises, Sounds, Ecologies, Musics challenges disciplinarity and broadens the interdisciplinary field of ecomusicologies by probing its contested keywords: sound, music, culture, society, environment, nature. The authors consider music and sound in natural and built environments, in various ecological and environmental frameworks, and in relation to traditional, Indigenous, and Western scientific ecological knowledges. Diverse ecologies are illustrated in the methodological, terminological, and topical variety of the chapters as well as the contributors’ disciplinary backgrounds and selected sources. These theoretical and practical studies expand sonic, scholarly, and political activism from the diversity-equity-inclusion agenda of social justice to embrace the more diverse and inclusive agenda of ecocentric ecojustice.