With a mix of the exploratory and the thunderously heavy, Atlanta, Georgia's O'Brother make post-rock with serious mood swings. Working in the vein of bands like Sigur Rós, True Widow, and Mogwai, their sound is a full exploration of the quiet/loud dynamic, drifting languidly between ethereal atmospherics and shoegaze-influenced walls of sound. The band made its debut in 2006 with the In Comparison to Me EP, followed in 2009 by the Death of Day EP, which was the first release to feature the full lineup of Tanner Merritt, Johnny Dang, Michael Martens, and Anton Dang. Tirelessly...