Led Zeppelin IV

Led Zeppelin were an English rock band, active in the late 1960s and throughout the 1970s. Formed as the New Yardbirds in 1968, the band consisted of guitarist Jimmy Page, singer Robert Plant, bassist/keyboardist John Paul Jones, and drummer John Bonham. They are widely considered to be one of the most successful, innovative and influential rock groups in the history of music. After changing their name, the band signed a favourable deal with... Atlantic Records that allowed them considerable artistic freedom. Led Zeppelin disliked the releasing of tracks as singles, preferring their albums to be viewed as indivisible, whole listening experiences, helping to promote the concept of album-orientated rock. Their first two albums, with their heavy, guitar-driven blues rock sound, led to Led Zeppelin being regularly cited as one of the progenitors of heavy metal and hard rock, even though the band's individualistic style drew from varied sources and transcends any single music genre.
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Heavy metal is a genre of rock music that developed in the late 1960s and early 1970s, largely in the Midlands of the United Kingdom and in the... United States. With roots in blues rock and psychedelic rock, the bands that created heavy metal developed a thick, massive sound, characterized by highly amplified distortion, extended guitar solos, emphatic beats, and overall loudness. Heavy metal lyrics and performance styles are generally associated with masculinity and machismo. The first heavy metal bands, such as Led Zeppelin, Black Sabbath, and Deep Purple, eventually attracted large audiences, though many were critically reviled , a status common throughout the history of the genre. In the mid-1970s Judas Priest helped spur the genre's evolution by discarding much of its blues influence; Motörhead introduced a punk rock sensibility and an increasing emphasis on speed. Bands in the New Wave of British Heavy Metal such as Iron Maiden followed in a similar vein. Before the end of the decade, heavy metal fans became known as "metalheads" or "headbangers".
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