Avant-garde metal (also known as experimental metal or avant-metal) is a type of heavy metal music. It uses many things from experimental music, such as sounds, instruments, and ways of playing music that are not normal. Avant-garde metal is inspired by progressive rock and extreme metal. It sounds similar to progressive metal.
Avant-garde metal started as a type of death metal. Some metal musicians wanted to experiment with their music. They were inspired by progressive rock. Some of the first avant-garde metal bands were Celtic Frost, Meshuggah, Sunn O))), Boris, Voivod and Helmet.
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Early arrivals were able to see experimental metal pioneers Helmet as well as retro punks the Casualties.