There are four different bands named Altered States, listed in order of popularity: a Japanese free/noise jazz / avant-prog group from the 90s, an 80s gothic rock band, a Bass music production trio from Manchester and a psychedelic rock band from Dallas. 1. If pure musicianship is the guiding criterion, Altered States are arguably one of the greatest guitar/bass/drums trios in the history of rock, which may strike some as an overstatement but the evidence is there for anyone willing to seek out the band's Japanese label releases.

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