Igorrr is a French experimental music project led by Olivier Wittersheim, known for blending mathcore, death metal, jazz, and electronic music into chaotic yet meticulously arranged compositions. The project emerged in the late 1990s and has released several albums including 'Nervous Light of Unseen Objects' (2014) and 'Spiritually Uncontrolled Art' (2017), gaining a cult following for its unpredictable and virtuosic approach to extreme music.