In 2009 Soisong recorded their first full-length album "xAj3z", the release of which was followed by a European "Reunion Tour" and a worldwide campaign in search of the band's missing virtual vocalists featured on the record. In 2010 Soisong declared a "Split Phase 2010", during which all of the members would concentrate on their personal work; however, two independently recorded solo EPs, both entitled "Soisong", were scheduled for release. Christopherson never finalized his work for the release, but "Soisong Split" was eventually published in September 2012, nearly two years after Christopherson's death. The release consists of a CoH "Soisong" EP by Pavlov, originally recorded in 2010, and a collection of four unpublished sketches by Christopherson that were made available on the band's website.