Tortoise's almost entirely instrumental music defies easy categorization. The group gained significant attention from their early career. The members have roots in Chicago's fertile music scene, playing in various indie rock and punk groups. Formed in 1990, Tortoise was among the first American indie rock bands to incorporate styles closer to krautrock, dub, minimalism, electronica and various jazz styles, rather than the standard rock and roll and punk that had dominated indie rock for years.

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