Lou Reed in the context of "Woody Guthrie"

Noise music (or simply noise) is a subgenre of experimental music that is characterised by its use of unwanted noise as a primary musical element. The genre has roots in early 20th century avant-garde music, but later drew influence from industrial music. It is characterized by a rejection of conventional music theory and traditional song structures, often featuring little or no melody, rhythm, or harmony. This type of music tends to challenge the conventional distinction between musical and non-musical sound.

"Noise as music" originated as an avant-garde music style in the 1910s through the work of Luigi Russolo an Italian Futurist, who published the manifesto The Art of Noises in 1913. Elements of noise music were later explored by artists in the Dada and Fluxus movements, as well as through electroacoustic music, modern classical and musique concrète. Composers such as John Cage, Edgard Varèse and James Tenney would explicitly use the term "noise" to describe some of their experimental practices. During the 1960s and 1970s, compositions such as Robert Ashley's "The Wolfman" (1964) and Pauline Oliveros "A Little Noise In The System" (1967) were among the earliest examples of contemporary noise music. While works by non-academic artists such as Lou Reed's Metal Machine Music were influential for later noise artists.

Metal Machine Music (subtitled *The Amine β Ring) is the fifth studio album by American rock musician Lou Reed. It was recorded on a three-speed Uher machine and was mastered/engineered by Bob Ludwig. It was released as a double album in July 1975 by RCA Records, but taken off the market three weeks later. A radical departure from the rest of his catalog, Metal Machine Music features no songs or recognizably structured compositions, eschewing melody and rhythm for modulated feedback and noise music guitar effects, mixed at varying speeds by Reed. Also in 1975, RCA released a Quadrophonic version of the Metal Machine Music recording that was produced by playing it back both forward and backward, and by flipping the tape over.

The album cost Reed his reputation in the music industry and has generally been panned by critics since its release. Simultaneously, it opened the door for some of his later, more experimental material. In 2008, Reed, Ulrich Krieger, and Sarth Calhoun collaborated to tour playing free improvisation inspired by the album as Metal Machine Trio. In 2011, Reed released a remastered version of Metal Machine Music.

Glam rock (also known as glitter rock) is a subgenre of rock music that developed in the United Kingdom in the early 1970s and was primarily defined by the hairstyles, makeup, and flamboyant clothing of its musicians, particularly platform shoes and glitter. Glam artists drew on diverse sources, ranging from bubblegum pop and 1950s rock and roll to cabaret, science fiction, and complex art rock. The flamboyant clothing and visual styles of performers were often camp or androgynous and have been described as playing with other gender roles.

The UK charts were inundated with glam rock acts from 1971 to 1975. The March 1971 appearance of T. Rex frontman Marc Bolan on the BBC's music show Top of the Pops—performing "Hot Love"—wearing glitter and satins, is often cited as the beginning of the movement. Other British glam rock artists included David Bowie, Mott the Hoople, Sweet, Slade, Mud, Roxy Music, Alvin Stardust, Wizzard and Gary Glitter. In the United States, the scene was much less prevalent, but US artists such as New York Dolls, Sparks, Suzi Quatro, Iggy Pop, Alice Cooper, Lou Reed and Jobriath achieved success in the UK and/or US. Glam rock declined after the mid-1970s, but influenced other musical genres including punk rock, post-punk, gothic rock and glam metal. The new romantic movement, which began as an underground fashion subculture movement in nightclubs in the late 1970s before becoming mainstream in the early 1980s, was also inspired by the visuals of the glam rock era.

The Velvet Underground was an American rock band formed in New York City in 1964. The New York Times wrote that the Velvet Underground was "arguably the most influential American rock band of our time". Though their integration of rock and the avant-garde earned them little commercial success during their initial nine-year run, they are now widely regarded as one of the most influential bands in rock music, as well as underground, experimental, and alternative music. Their provocative subject matter and experimentation were instrumental in the development of punk rock, new wave and other genres.

The group performed under several names before settling on the Velvet Underground in 1965, taken from the title of a 1963 book on atypical sexual behavior. Its classic lineup consisted of singer and guitarist Lou Reed, Welsh multi-instrumentalist John Cale, guitarist Sterling Morrison, and percussionist Moe Tucker. In 1966, pop artist Andy Warhol became their official manager. They served as the house band at Warhol's studio, The Factory, and performed with his traveling multimedia show, Exploding Plastic Inevitable, from 1966 to 1967. Their debut album, The Velvet Underground & Nico, featuring the German singer and model Nico, was released in 1967 to critical indifference and poor sales, although it has since been hailed as one of the greatest albums in music history.