Machine Head is the sixth studio album released by the English hard rock band Deep Purple. It was recorded through December 1971 in Montreux, Switzerland, and released in March 1972. Machine Head is often cited as a major influence in the early development of the heavy metal music genre. Commercially, it is Deep Purple's most successful album, topping the charts in several countries following its release. The album reached number 1 in the United Kingdom and stayed in the to p40 for 20 weeks. It reached number 7 in the United States, remaining on the Billboard 20 0for 118 weeks.

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