Catapilla

English underground refers to a loose, DIY network of bands, audiences, promoters, and fanzines that coalesced in England in the late 1960s and 1970s. It fused heavy psychedelia, space-bound rock jams, anarchic proto‑punk attitude, and experimental folk and drone into an alternative to the mainstream British pop and rock industry. Rather than a single sound, it describes a culture: free festivals and communal gigs, improvised sets in squats and arts colleges, independent labels and press, and a commitment to countercultural ideals. Its music tends to favor long forms, trance‑like grooves, modal or drone harmony, tape and electronics experimentation, and lyrics steeped in surrealism, political dissent, and visionary imagery.

Progressive rock is a rock subgenre that expands the genre’s formal, harmonic, and conceptual boundaries. It favors long-form compositions, intricate arrangements, and virtuosic musicianship, often drawing on Western classical, jazz, folk, and psychedelic idioms. Typical hallmarks include multi-part suites, shifting time signatures, extended instrumental passages, recurring motifs, and concept albums that present unified themes or narratives. The sound palette commonly features electric guitar, bass, and drums alongside an array of keyboards (Hammond organ, Mellotron, Moog/ARP synthesizers, piano), woodwinds or brass, and occasional orchestral additions. Lyrics often explore science fiction, mythology, philosophy, social commentary, and introspective themes.