Lost in the Sound of Separation is the sixth studio album by American rock band Underoath. It was released on September 2, 2008, through Solid State and Tooth & Nail Records. Following the release of their fifth studio album Define the Great Line (2006), relationships between members became strained to the point they almost broke up. They decided to go on a hiatus; Lost in the Sound of Separation was recorded at Glow in the Dark Studios in Atlanta, Georgia in March and April 2008. The band produced the album with Adam Dutkiewicz and Matt Goldman, both of whom worked on Define the Great Line. The album has been described as metalcore, post-hardcore and screamo, with elements of industrial, recalling the works of Refused, At the Drive-In, and Cult of Luna.

Underoath headlined one stage at the inaugural Mayhem Festival prior to the release of the "Desperate Times Desperate Measures" at the end of August 2008. The song was released to radio on September 16, 2008; around this time, the band toured across parts of Europe, South Africa, Australia. They then embarked on a headlining tour of the United States, and closed out the year with shows in South and Central America. To open 2009, they went on a co-headlining Canadian tour with Norma Jean, before touring Europe as part of the Give it a Name festival. The music video for "Too Bright to See Too Loud to Hear" appeared on the band's Myspace profile in April 2009; it was released to radio on June 2, 2009. Underoath spent the next three months touring as part of the Warped Tour. The song Desperate Times, Desperate Measures was released as a downloadable song in the music/rhythm game Rock Band 2.

Lost in the Sound of Separation received favorable reviews from music critics, some of whom saw it as more experimental than the band's previous works, while others regarded it as a refinement of Define the Great Line. The album reached number eight on the Billboard 200 chart, selling around 56,000 copies in its first week of release. Alongside this, it topped the Top Christian Albums chart, and peaked at number 15 in Canada. It was nominated for a Grammy Award for Best Boxed or Special Limited Edition Package, and a Dove Award for Recorded Music Packaging of the Year.

Name	Status	Rating	Review
insectwhorefare
sloane
Ben Carr