Progressive rock (shortened as prog rock or simply prog; also known as classical rock or symphonic rock; sometimes conflated with art rock) is a broad genre of rock music that developed in the United Kingdom and United States throughout the mid-to late 1960s, peaking in the early 1970s. Initially termed "progressive pop", the style was an outgrowth of psychedelic bands who abandoned standard pop traditions in favour of instrumentation and compositional techniques more frequently associated with jazz, folk, or classical music. Additional elements contributed to its "progressive" label: lyrics were more poetic, technology was harnessed for new sounds, music approached the condition of "art", and the studio, rather than the stage, became the focus of musical activity, which often involved creating music for listening rather than dancing. Prog is based on fusions of styles, approaches and genres, involving a continuous move between formalism and eclecticism. Due to its historical reception, prog's scope is sometimes limited to a stereotype of long solos, long albums,
El rock progresivo (abreviado como prog rock o simplemente prog; también conocido como rock clásico o rock sinfónico; a veces confundido con art rock) es un amplio género de música rock que se desarrolló en el Reino Unido y Estados Unidos a lo largo de mediados a finales de la década de 1960, culminando a principios de la década de 1970. Inicialmente llamado "pop progresivo", el estilo fue un surgimiento de bandas psicodélicas que abandonaron las tradiciones pop estándar a favor de instrumentos y técnicas de composición más frecuentemente asociadas con la música jazz, folk o clásica. Elementos adicionales contribuyeron a su etiqueta "progresiva": las letras eran más poéticas, la tecnología se aprovechó para nuevos sonidos, la música se acercó a la condición de "arte", y el estudio, en lugar del escenario, se convirtió en el foco de la actividad musical, que a menudo implicaba la creación de música para escuchar en lugar de bailar.