There are many different artists called Altered States: 1. A Japanese free / noise jazz / avant-prog group. 2. A gothic rock band from England. 3. A dance music production trio from Manchester. 4. A psychedelic rock band from Dallas. 1. A Japanese free / noise jazz / avant-prog trio. According to the official source the band has been around since 1989, but some band biographies place the time and place of the group's inception as 1990 in Osaka.