Psychedelic rock

Psychedelic rock is a subgenre of rock music that originally emerged during the mid-1960s, inspired by psychedelic culture and primarily centered around the influence of psychoactive and hallucinogenic drugs. The music incorporated new electronic sound effects and recording techniques, extended instrumental solos, and improvisation. Many psychedelic groups differ in style with the label often applied spuriously.

Originating in the mid-1960s among British and American musicians, the sound of psychedelic rock invokes three core effects of LSD: depersonalization, dechronicization (the bending of time), and dynamization (when fixed, ordinary objects dissolve into moving, dancing structures), all of which detach the user from everyday reality. Musically, the effects may be represented via novelty studio tricks, electronic or non-Western instrumentation, disjunctive song structures, and extended instrumental segments. Some of the earlier 1960s psychedelic rock musicians were based in folk, jazz, and the blues, while others showcased an explicit Indian classical influence called "raga rock". In the 1960s, there existed two main variants of the genre: the more whimsical, surrealist British psychedelia and the harder American West Coast "acid rock". While "acid rock" is sometimes deployed interchangeably with the term "psychedelic rock", it also refers more specifically to the heavier, harder, and more extreme ends of the genre.

The peak years of psychedelic rock were between 1967 and 1969, with milestone events including the 1967 Summer of Love and the 1969 Woodstock Festival, spearheading an international phenomena that birthed a widespread counterculture and the hippie movement before declining as changing attitudes, the loss of some key individuals, and a back-to-basics approach led surviving performers to move into new musical areas. The genre bridged the transition from early blues and folk-based rock to progressive rock and hard rock, and as a result contributed to the development of sub-genres such as heavy metal. Since the late 1970s it has been revived in various forms of neo-psychedelia.

As a musical style, psychedelic rock incorporated new electronic sound effects and recording effects, extended solos, and improvisation. Features mentioned in relation to the genre include:

The term "psychedelic" was coined in 1956 by psychiatrist Humphry Osmond in a letter to LSD exponent Aldous Huxley and used as an alternative descriptor for hallucinogenic drugs in the context of psychedelic psychotherapy. As the countercultural scene developed in San Francisco, the terms acid rock and psychedelic rock were used in 1966 to describe the new drug-influenced music and were being widely used by 1967. The two terms are often used interchangeably, but acid rock may be distinguished as a more extreme variation that was heavier, louder, relied on long jams, focused more directly on LSD, and made greater use of distortion.

Music critic Richie Unterberger says that attempts to "pin down" the first psychedelic record are "nearly as elusive as trying to name the first rock & roll record". Some of the "far-fetched claims" include the instrumental "Telstar" (produced by Joe Meek for the Tornados in 1962) and the Dave Clark Five's "massively reverb-laden" "Any Way You Want It" (1964). The first mention of LSD on a rock record was the Gamblers' 1960 surf instrumental "LSD 25". A 1962 single by the Ventures, "The 2000 Pound Bee", issued forth the buzz of a distorted, "fuzztone" guitar, and the quest into "the possibilities of heavy, transistorised distortion" and other effects, like improved reverb and echo, began in earnest on London's fertile rock 'n' roll scene. By 1964 fuzztone could be heard on singles by P.J. Proby, and the Beatles had employed feedback in "I Feel Fine", their sixth consecutive number 1 hit in the UK.

According to AllMusic, the emergence of psychedelic rock in the mid-1960s resulted from British groups who made up the British Invasion of the US market and folk rock bands seeking to broaden "the sonic possibilities of their music". Writing in his 1969 book The Rock Revolution, Arnold Shaw said the genre in its American form represented generational escapism, which he identified as a development of youth culture's "protest against the sexual taboos, racism, violence, hypocrisy and materialism of adult life".

American folk singer Bob Dylan's influence was central to the creation of the folk rock movement in 1965, and his lyrics remained a touchstone for the psychedelic songwriters of the late 1960s. Virtuoso sitarist Ravi Shankar had begun in 1956 a mission to bring Indian classical music to the West, inspiring jazz, classical and folk musicians. By the mid-1960s, his influence extended to a generation of young rock musicians who soon made raga rock part of the psychedelic rock aesthetic and one of the many intersecting cultural motifs of the era. In the British folk scene, blues, drugs, jazz and Eastern influences blended in the early 1960s work of Davy Graham, who adopted modal guitar tunings to transpose Indian ragas and Celtic reels. Graham was highly influential on Scottish folk virtuoso Bert Jansch and other pioneering guitarists across a spectrum of styles and genres in the mid-1960s. Jazz saxophonist and composer John Coltrane had a similar impact, as the exotic sounds on his albums My Favorite Things (1960) and A Love Supreme (1965), the latter influenced by the ragas of Shankar, were source material for guitar players and others looking to improvise or "jam".