Mountain

Proto-metal is the late-1960s hard, heavy strain of rock that crystallized the sonic vocabulary later codified as heavy metal. It bridges blues-rock, garage rock, and psychedelic rock with louder amplification, thicker distortion, and riff‑centric songwriting. Musically, proto-metal emphasizes power-trio or organ/guitar lineups, pentatonic/blues-derived riffs, power chords, and aggressive, often fuzz-saturated tones. Vocals can range from soulful shouts to theatrical wails, and rhythms often push straight 4/4 grooves at mid-to-up tempo with a palpable sense of weight and drive. Historically, it includes bands whose heaviest work predated metal as a named genre, as well as early albums by future metal standard-bearers. Its sound laid the groundwork for the timbre, riff language, and attitude of heavy metal and, by extension, numerous metal subgenres.

Heavy psych is a louder, denser offshoot of late‑1960s psychedelic rock characterized by fuzz‑soaked guitar tones, wah‑drenched solos, thunderous drums, and a visceral low‑end. It takes the exploratory jams and mind‑bending studio tricks of psychedelia and pushes them toward proto‑metal weight and volume. Musically, it leans on blues‑based riffs, pentatonic and modal improvisation (especially Dorian and Mixolydian), droning vamps, and feedback‑saturated climaxes. Production often favors analog saturation, tape echo, phasing, and other period effects that magnify a sense of heady, cosmic intensity. The result is a sound that bridges psychedelic freedom and hard rock punch—music that feels both trippy and physically overwhelming, laying essential groundwork for heavy metal, stoner rock/metal, doom, and space rock.

Hard rock is a loud, riff-driven style of rock music built around heavily amplified electric guitars, a powerful rhythm section, and assertive vocals. Songs typically center on memorable, blues-based guitar riffs, strong backbeats, and energetic, often shouted or belted choruses. The genre emphasizes power, groove, and visceral impact over intricate harmony or extended improvisation. Distortion, power chords, pentatonic melodies, and call‑and‑response between vocals and guitar are core traits, while lyrical themes often explore rebellion, lust, swagger, escape, and cathartic release.

Jam band is a rock-centered style defined by extended improvisation, fluid song structures, and live performance as the core creative medium. It blends elements of psychedelic rock, blues, jazz, country rock, folk rock, funk, and bluegrass, favoring modal grooves and open-ended forms over radio-length arrangements. Sets commonly feature segues between songs, dynamic builds and releases, and thematic development in real time—turning concerts into unique, unrepeatable experiences. Audience culture (taping, trading, and multi-night runs) and a festival ecosystem are integral to the genre’s identity, making the community as central as the repertoire.

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.