Defeated Sanity is a German technical death metal band from Dachsbach, Bavaria that was conceived in 1993 by guitarist Wolfgang Teske and his son, drummer Lille Gruber. The group's lineup currently consists of Gruber, Jacob Schmidt, Josh Welshman, and Vaughn Stoffey. The band is known for their very brutal, abrasive and intricate 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.
To date the band has released six studio albums: Prelude to the Tragedy, Psalms of the Moribund, Chapters of Repugnance, Passages into Deformity, Disposal of the Dead / Dharmata, and The Sanguinary Impetus. The group also released numerous promos, demos, and splits. Influenced by bands such as Cannibal Corpse and Suffocation, their music style is mostly inspired by American extreme metal.