Psychedelia in the context of "Swinging London"

Psychedelics are a subclass of hallucinogenic drugs whose primary effect is to trigger non-ordinary mental states (known as psychedelic experiences or "trips") and a perceived "expansion of consciousness". Also referred to as classic hallucinogens or serotonergic hallucinogens, the term psychedelic is sometimes used more broadly to include various other types of hallucinogens as well, such as those which are atypical or adjacent to psychedelia like salvia and MDMA, respectively.

Classic psychedelics generally cause specific psychological, visual, and auditory changes, and oftentimes a substantially altered state of consciousness. They have had the largest influence on science and culture, and include mescaline, LSD, psilocybin, and DMT. There are a large number of both naturally occurring and synthetic serotonergic psychedelics.

Funk is a music genre that originated in African-American communities in the mid-1960s when musicians created a rhythmic, danceable new form of music through a mixture of various music genres that were popular among African-Americans in the mid-20th century. It deemphasizes melody and chord progressions and focuses on a strong rhythmic groove of a bassline played by an electric bassist and a drum part played by a percussionist, often at slower tempos than other popular music. Funk typically consists of a complex percussive groove with rhythm instruments playing interlocking grooves that create a "hypnotic" and "danceable" feel. Early funk, specifically James Brown, fused jazz and blues, and added a syncopated drum groove.

Funk originated in the mid-1960s, with James Brown's development of a signature groove that emphasized the downbeat—with a heavy emphasis on the first beat of every measure ("The One"), and the application of swung 16th notes and syncopation on all basslines, drum patterns, and guitar riffs. Rock- and psychedelia-influenced musicians Sly and the Family Stone and Parliament-Funkadelic fostered more eclectic examples of the genre beginning in the late 1960s. Other musical groups developed Brown's innovations during the 1970s and the 1980s, including Kool and the Gang, Ohio Players, Fatback Band, Jimmy Castor Bunch, Bootsy Collins, Earth, Wind & Fire, B.T. Express, Hamilton Bohannon, One Way, Lakeside, Dazz Band, The Gap Band, Slave, Aurra, Roger Troutman & Zapp, Con Funk Shun, Cameo, Bar-Kays and Chic.

The sitar (English: /ˈsɪtɑːr/ or /sɪˈtɑːr/; IAST: sitāra) is a plucked stringed instrument, originating from the Indian subcontinent, used in Hindustani classical music. The instrument was invented in the 18th century, and arrived at its present form in 19th-century India. Khusrau Khan, an 18th-century figure of the Mughal Empire, has been identified by modern scholarship as the inventor of the sitar. According to most historians, he developed the sitar from the setar, an Iranian instrument of Abbasid or Safavid origin.

Used widely throughout the Indian subcontinent, the sitar became popularly known in the wider world through the works of Ravi Shankar, beginning in the late 1950s and early 1960s. The advent of psychedelic culture during the mid-to-late 1960s set a trend for the use of the sitar in Western popular music, with the instrument appearing on tracks by bands such as the Beatles, the Rolling Stones, Metallica and many others.

Acid rock is a loosely defined type of rock music that evolved out of the mid-1960s garage punk movement and helped launch the psychedelic subculture. While the term has sometimes been used interchangeably with "psychedelic rock", acid rock also specifically refers to a more musically intense, rawer, or heavier subgenre or sibling of psychedelic rock. Named after lysergic acid diethylamide (LSD), the style is generally defined by heavy, distorted guitars and often contains lyrics with drug references and long improvised jams.

Compared to other forms of psychedelic rock, acid rock features a harder, louder, heavier, or rawer sound. Much of the style overlaps with 1960s garage punk, proto-metal, and early heavy, blues-based hard rock. It developed mainly from the American West Coast, where groups did not focus on the novelty recording effects or whimsy of British psychedelia; instead, the subgenre emphasized the heavier qualities associated with both the positive and negative extremes of the psychedelic experience.

Psychedelic music (sometimes called psychedelia) is a wide range of popular music styles and genres influenced by 1960s psychedelia, a subculture of people who used psychedelic drugs such as DMT, LSD, mescaline, and psilocybin mushrooms, to experience synesthesia and altered states of consciousness. Psychedelic music may also aim to enhance the experience of using these drugs and has been found to have a significant influence on psychedelic therapy.

Psychedelia embraces visual art, movies, and literature, as well as music. Psychedelic music emerged during the 1960s among folk and rock bands in the United States and the United Kingdom, creating the subgenres of psychedelic folk, psychedelic rock, acid rock, and psychedelic pop before declining in the early 1970s. Numerous spiritual successors followed in the ensuing decades, including progressive rock, krautrock, and heavy metal. Since the 1970s, revivals have included psychedelic funk, neo-psychedelia, and stoner rock as well as psychedelic electronic music genres such as acid house, trance music, and new rave.

Parliament-Funkadelic (abbreviated as P-Funk) is an American music collective of rotating musicians headed by George Clinton, primarily consisting of the funk bands Parliament and Funkadelic, both active since the 1960s. With an eclectic style drawing on psychedelia, outlandish fashion, and surreal humor, they have released albums such as Maggot Brain (1971), Mothership Connection (1975), and One Nation Under a Groove (1978) to critical praise, and scored charting hits with singles such as "Tear the Roof Off the Sucker" (1975) and "Flash Light" (1978). Overall, the collective achieved thirteen top ten hits in the American R&B music charts between 1967 and 1983, including six number one hits. Their work has had an influential effect on subsequent funk, post-punk, hip-hop, and techno artists of the 1980s and 1990s, while their collective mythology has helped pioneer Afrofuturism.

The collective's origins date back to the doo-wop group the Parliaments, formed by Clinton during the late 1950s in suburban New Jersey. By the late 1960s, Clinton had gained experience as a producer-writer for Motown Records and, inspired by artists such as Jimi Hendrix, Sly Stone, and Frank Zappa, he relocated to Detroit and enlisted musicians from his New Jersey days in his own two sister bands Parliament and Funkadelic; the first would go on to develop a commercially successful style of science fiction–inspired funk, while the second pursued a heavier sound which blended funk with psychedelic rock. The name "Parliament-Funkadelic" became the catch-all term for the dozens of related musicians recording and touring different projects in Clinton's orbit, including the female vocal spinoff groups the Brides of Funkenstein and Parlet. Financial and label issues slowed the collective's recorded output in the 1980s while Clinton and other members began solo careers, with Clinton also consolidating the collective's multiple projects and touring under names such as George Clinton and the P-Funk All-Stars. In the 1990s, their sound became the chief inspiration for the West Coast hip hop subgenre G-funk.

Hypnagogic pop (or simply h-pop) is a loosely defined style of pop and psychedelic music that evokes cultural memory and nostalgia for the popular entertainment of the past (principally the 1980s). It emerged in the mid to late 2000s out of the American post-noise underground as Gen X lo-fi and noise musicians began adopting retro aesthetics from their childhood, such as radio and soft rock, new wave music, video game music, synth-pop and R&B. Recordings were typically marked by the use of outmoded analog equipment and DIY experimentation, while distributed on cassettes and CD-R's with circulation primarily based on the Internet through blog sites.

The genre's name was coined by journalist David Keenan in an August 2009 issue of The Wire to label the developing trend, which he characterized as "pop music refracted through the memory of a memory." It was used interchangeably with "chillwave" or "glo-fi" and gained critical attention through artists such as Ariel Pink and James Ferraro. The music has been variously described as a 21st-century update of psychedelia, a reappropriation of media-saturated capitalist culture, and an "American cousin" to British hauntology.