The Future Sound of London (often abbreviated to FSOL) is a British electronic music group composed of Garry Cobain (sometimes stylised as Gaz Cobain) and Brian Dougans. The duo are often credited with pushing the boundaries of electronic music experimentation and of pioneering a new era of dance music. Although often associated with ambient music, Cobain and Dougans usually resist being typecast into any one particular genre. Their work covers many areas of electronic music, such as ambient techno, house music, trip hop, ambient dub, acid techno.

After a four-year hiatus, rumours of mental illness began to spread which turned out to be nothing more than exaggeration of Cobain's mercury poisoning from fillings in his teeth. Cobain gained much from the experience, realizing that music was a tool for psychic exploration and entertainment but also one for healing . The pair returned in 2002 with "The Isness", a record heavily influenced by 1960s and 1970s psychedelia and released under their alias Amorphous Androgynous. It was preceded by Papua New Guinea Translations, a mini album which contained a mixture of remixes of FSOL's track as well as new material from The Isness sessions. The album received mixed press due to the drastic change in sound which was inspired by Cobain's and Dougan's (separate) travels to India and immersion in spiritualism, nevertheless the majority was positive with Muzik magazine offering the album a 6/5 mark and dubbing it "...a white beam of light from heaven..." and other British publications such as The Times, The Guardian and MOJO praising the album and the band's ability to do something so completely different from what they had done before. Three years on, they followed the album with a continuation of the Amorphous Androgynous project, Alice in Ultraland. Rumoured to be accompanied by a film of the same title, the album took The Isness' psychedelic experimentation and toned it down, giving the album a singular theme and sound, and replacing the more bizarre moments with funk and ambient interludes. The album was ignored by the press, but was received more favourably among fans than its predecessor. Unlike The Isness, which featured almost 100 musicians over the course of it and the various alternative versions and remix albums, Alice in Ultraland featured a fairly solid band lineup throughout, which extended to live shows which the band had undertaken away from the ISDN cables from 2005 onwards. ...song form has just become too limited. And when I say 'psychedelic', it's not a reference to 60s music but to the basic outlook of a child, which we all have. I think this is the only salvation now. Dance music taught us how to use the studio in a new way, but we have to now take that knowledge and move on with it. This stuff, electronic music, is not dead. It's a process that is ongoing. We have to take hold of the past and go forward with it...

Answer the following question by taking a quote from the article: How did their sound change in the new millennium?
Cobain gained much from the experience, realizing that music was a tool for psychic exploration and entertainment but also one for healing .