リフレイン

Psychedelic rock is a style of rock music that seeks to evoke, simulate, and expand altered states of consciousness through sound. It typically features timbral experimentation (fuzz, wah, tape delay, phasing), drones, modal or raga-influenced harmony, extended improvisation, studio-as-instrument production, and surreal, mystical, or mind-expanding lyrics. Emerging from mid-1960s counterculture, it fused garage-band energy with folk, blues, and non-Western musical ideas—especially Indian classical ragas—while embracing new studio technologies and concert light shows. Both a live and a studio art, psychedelic rock ranges from jangly, kaleidoscopic pop to heavy, hypnotic jams and cosmic soundscapes.

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.

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.