Defeated Sanity is a German technical death metal band from Dachsbach, Bavaria that was formed in 1993 originally as a side project of guitarist Wolfgang Teske and his son, drummer Lille Gruber. The group's lineup currently consists of Gruber (drums), Josh Welshman (vocals), and Jacob Schmidt (bass guitar). The band is known for their very brutal, technical and abrasive style of death metal, while at the same time maintaining almost jazz fusion style influences. Defeated Sanity's genre has also sometimes been categorized as progressive death metal.
Defeated Sanity has released six studio albums: Prelude to the Tragedy (Grindethic Records, 2004), Psalms of the Moribund (Grindethic, 2007), Chapters of Repugnance (Willowtip Records, 2010), Passages into Deformity (Willowtip, 2013), Disposal of the Dead / Dharmata (Willowtip, 2016), and The Sanguinary Impetus (Willowtip, 2020). The group also released numerous promos, demos, and splits. Influenced by bands such as Cannibal Corpse and Suffocation, their music style is mostly based on American death metal.