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'''Heavy metal''' is a musical genre that was developed mainly in the United States of America and the United Kingdom, heavy metal is primarily noted for an emphasis on distortion, palm muting, aggressive lyrical content, bass-heavy sounds, as well as the influence of blues scales and classical structures. Heavy Metal has also spawned numerous sub genres which omit or improve upon standard technique, or invent new one altogether, giving heavy metal as a genre an impressive variety of styles and sounds. Heavy metal's origins are both rooted in the cultural upheavals that occurred during the 1960s, such as the conflict in Vietnam and the reevaluation and mass rejection of previous social schema, and the enormous influence of bands such as [[The Jimi Hendrix Experience]], [[Led Zeppelin]], and [[Black Sabbath]] that are regarded as proto-metal as well as hard rock. Other musical influences include psychedelic rock, blues rock, and the still developing progressive rock genre. Though heavy metal initially borrowed heavily from the blues in terms of playing style, this was later largely discarded by future metal acts such as [[Judas Priest]].  

'''Heavy metal''' is a musical genre that was developed mainly in the United States of America and the United Kingdom, heavy metal is primarily noted for an emphasis on distortion, palm muting, aggressive lyrical content, bass-heavy sounds, as well as the influence of blues scales and classical structures. Heavy Metal has also spawned numerous sub genres which omit or improve upon standard technique, or invent new one altogether, giving heavy metal as a genre an impressive variety of styles and sounds. Heavy metal's origins are both rooted in the cultural upheavals that occurred during the 1960s, such as the conflict in Vietnam and the reevaluation and mass rejection of previous social schema, and the enormous influence of bands such as [[The Jimi Hendrix Experience]], [[Led Zeppelin]], and [[Black Sabbath]], which are regarded as proto-metal as well as hard rock. Other musical influences include psychedelic rock, blues rock, and the still developing progressive rock genre. Though heavy metal initially borrowed heavily from the blues in terms of playing style, this was later largely discarded by future metal acts such as [[Judas Priest]].