Cosa Brava

Avant-rock is an umbrella term for rock that adopts avant-garde methods: extended techniques, atonal or post-tonal harmony, discontinuous song structures, sound collage, and non-standard instrumentation. Rather than pursuing radio-friendly hooks, it foregrounds timbre, texture, and form. Artists often treat the studio as an instrument, splice tape, deploy prepared guitars and unconventional tunings, fold in free improvisation, and import practices from modern classical music, free jazz, and experimental electronics. Rhythms may be polyrhythmic or asymmetrical; lyrics can be surreal, political, or purely phonetic. The result is rock that challenges convention while retaining some of the genre’s pulse and amplification.

Jazz is an improvisation-centered music tradition that emerged from African American communities in the early 20th century. It blends blues feeling, ragtime syncopation, European harmonic practice, and brass band instrumentation into a flexible, conversational art. Defining features include swing rhythm (a triplet-based pulse), call-and-response phrasing, blue notes, and extended harmonies built on 7ths, 9ths, 11ths, and 13ths. Jazz is as much a way of making music—spontaneous interaction, variation, and personal sound—as it is a set of forms and tunes. Across its history, jazz has continually hybridized, from New Orleans ensembles and big-band swing to bebop, cool and hard bop, modal and free jazz, fusion, and contemporary cross-genre experiments. Its influence permeates global popular and art music.