During the band’s early years, when they were fronted by former vocalist Dallas Taylor, Underoath displayed a heavier style than their later, more well-known work, incorporating disparate influences from death and black metal. With Taylor, they released Act of Depression, Cries of the Past, and The Changing of Times.Following Taylor’s departure, Spencer Chamberlain became lead vocalist. The band then released They’re Only Chasing Safety and Define The Great Line, gaining a certified gold rating and the highest-charting Christian album on The Billboard 200 since 1997, respectively. These two albums have given them more mainstream and commercial success. They’re Only Chasing Safety marked an extreme departure from their earlier work, with extensive use of clean vocals and poppy rhythms, and a near-complete eradication of breakdowns and the use of double-bass. Define The Great Line reflected another shift in style, once again incorporating heavier styles into Underoath’s sound. While the album still featured extensive clean vocals, its use of heavier vocals, detuned guitars, and Botch-inspired guitar work paved the way for Underoath’s future.
Underoath released a live album called Survive, Kaleidoscope on May 27, 2008. Earlier that year, the band recorded a new studio album called Lost In The Sound Of Separation, which was released on September 2, 2008, peaking at number 8 on the Billboard 200.