Katatonia are a Swedish metal band formed in Stockholm in 1991 by Jonas Renkse and Anders Nyström. The band started as a studio-only project for the duo, as an outlet for the band's love of death metal. Increasing popularity lead them to add more band members for live performances, though outside of the band's founders, the lineup was constantly changing, revolving door of musicians throughout the 1990s, notably including Mikael Åkerfeldt of the band Opeth for a period. After two death/doom albums, Dance of December Souls (1993) and Brave Murder Day (1996), problems with Renkse's vocal cords coupled with new musical influences lead the band away from the screamed vocals of death metal to a more traditional, melodic form of heavy metal music. The band released two more albums, Discouraged Ones (1998) and Tonight's Decision (1999), before settling into a stable quintet lineup for all of 2000's.