Ann McMillan

Whale song is a body of bioacoustic recordings featuring the vocalizations of whales—most famously humpback whales—presented and listened to as music. Although whales have sung for millennia, the genre coalesced in the late 1960s and 1970s when high‑fidelity hydrophone recordings became widely published on albums and in documentaries. The sound world is characterized by slowly evolving phrases, haunting glissandi, pulsed rhythms, and a striking dynamic and spectral range, from infrasonic rumbles to piercing squeals. Humpback whale songs exhibit hierarchical structure (units → phrases → themes → songs), seasonal variation, and cultural transmission across populations, which listeners perceive as forms of motif development and long‑form composition. As a listening genre, whale song straddles music, science, and environmental sound art. It is used for contemplation and relaxation, has influenced ambient and new age aesthetics, and remains a touchstone for eco‑acoustic awareness.

Avant-garde music is an umbrella term for boundary-pushing practices that challenge prevailing norms of harmony, rhythm, timbre, form, and performance. It privileges experimentation, conceptual rigor, and a willingness to reframe what counts as music at all. Historically tied to early 20th‑century artistic modernism, avant-garde music introduced atonality, the emancipation of noise, and new forms of notation and process. It embraces indeterminacy, extended techniques, electronics, spatialization, and multimedia performance, treating sound as material to be sculpted, questioned, and reinvented.

Animal sounds is a non-music, documentary-focused genre centered on the unaccompanied vocalizations and behaviors of animals—such as birdsong, whale song, insect choruses, amphibian calls, and mammal vocalizations—captured in the field. Rather than emphasizing melody, harmony, or beat, works in this genre present the acoustic ecology of a place and time. Producers often favor minimal processing to preserve scientific, educational, and experiential value, though some releases organize recordings into thematic "soundscapes" (e.g., dawn chorus, coastal rookeries). The genre is commonly used for education, research, relaxation, and as raw material for ambient, electroacoustic, and sound art contexts.