High Quality Content by WIKIPEDIA articles! Lost in the Sound of Separation is the sixth album by American metalcore band Underoath. The album was released on August 30, 2008 in some markets, September 2, 2008 in the United States, and as late as September 19, 2008 in Italy. The album title is taken from a line of the lyrics of "We Are the Involuntary". In an interview with MTV News about the effort, the band stated it featured 11 songs that total around 42 minutes. It is the band`s last release with founding member and drummer, Aaron Gillespie.