A Contraluz

Rock is a broad family of popular music centered on amplified instruments, a strong backbeat, and song forms that foreground riffs, choruses, and anthemic hooks. Emerging from mid‑20th‑century American styles like rhythm & blues, country, and gospel-inflected rock and roll, rock quickly expanded in scope—absorbing folk, blues, and psychedelic ideas—while shaping global youth culture. Core sonic markers include electric guitar (often overdriven), electric bass, drum kit emphasizing beats 2 and 4, and emotive lead vocals. Rock songs commonly use verse–chorus structures, blues-derived harmony, and memorable melodic motifs, ranging from intimate ballads to high‑energy, stadium‑sized performances.

Latin (as a genre label) is a broad umbrella used by the recording industry to categorize popular music rooted in Latin America, the Caribbean, and the Iberian world, often characterized by syncopated Afro-diasporic rhythms, dance-forward grooves, and lyrics primarily in Spanish or Portuguese. As a marketplace category that took shape in the mid-20th century United States, it gathers diverse traditions—Afro-Cuban, Brazilian, Mexican, and Caribbean styles—into a shared space. In practice, "Latin" spans everything from big-band mambo and bolero ballads to contemporary pop, rock, hip hop, and dance fusions produced by artists of Latin American heritage.

Murga is a carnival-rooted performance genre that blends choral singing, sharp social satire, and highly rhythmic street percussion. Typically presented by neighborhood troupes, it combines theatrical staging, elaborate costumes, and choreographed movement with a driving, snare-led groove. Although it has variants across the Hispanic world, murga is especially associated with the Río de la Plata region, where its sound crystallized into massed chorus, rapid-fire "cuplés" (satirical couplets), and set pieces that open (saludo) and close (retirada) each show. The tone ranges from festive and humorous to bitingly political, all delivered with bold vocal projection and call-and-response energy.