Maarten Devoldere (born in 1988) is a Belgian singer-songwriter and music producer. He began his career as a 22-year-old in the band Balthazar. In 2016, he started his solo project Warhaus. The music he played with Balthazar band he described as simply pop music. They had recorded three albums and one single and after the break they took, they intended to come back and record the fourth album to be released in early 2018. Maarten Devoldere took up on the solo project - Warhaus. His style there is described as a continuation of Leonard Cohen style but more dense with influences of Tom Waits' style and Serge Gainsbourg ballad songs. Some of the Warhaus-period songs and albums had been recorded with Devoldere's girlfriend Sylvie Kreusch, a Belgian musician who released her solo debut in 2018.