Reverse Osmosis is an A Capella group formed at the University of Southern California in January 2001. They have released three albums: 2002's Aural Pleasure, 2003's Fifty Million Reverse Osmosis Fans Can't Be Wrong, and 2004's Purity Guaranteed. This fall, they will release their fourth studio effort, sisomsO. They were recently honored as finalists at the ICCA Finals in New York, where they came away scored as the number one mixed group in the world! Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.