Underoath will release its fourth studio album, "Lost in the Sound of Separation," on Sept. 2 via Seattle-based independent label Tooth & Nail/Solid State. The rock act will support the forthcoming set with a busy international touring schedule.

Underoath is currently performing on the Hot Topic stage on the inaugural Rockstar Energy Drink Mayhem Festival, which also features co-headliners Slipknot and Disturbed, among others. The traveling 30-date Mayhem tour launched July 9 in Seattle and wraps Aug. 19 in Buffalo, N.Y.

Between dates on the Mayhem tour, Underoath will perform a series of headlining concerts in various markets with support act the Red Chord. In September, the six-piece -- vocalist Spencer Chamberlain, guitarist Tim McTague, bassist Grant Brandell, drummer Aaron Gillespie, keyboardist Chris Dudley and guitarist James Smith -- will embark on an eight-city trek in the United Kingdom, to be followed by concerts in Germany, Italy, South Africa and Australia.

The Tampa, Fla.-based outfit is expected to headline venues in the United States, beginning Oct. 4 at the 3,000-capacity Pipeline Cafe in Honolulu. Beyond its fall North American jaunt, touring plans call for visits to Central and South America.

"Lost in the Sound of Separation" follows 2006's "Define the Great Line," which debuted and peaked at No. 2 on The Billboard 200. The set also debuted at No. 1 on the Top Christian Albums chart, where it stayed for four weeks. It has sold 399,000 copies in the United States, according to Nielsen SoundScan.