Born on the Franco-German border, specifically in the city of Strasbourg, Antoine Lang grew up in a multicultural and musically diverse environment. His journey took him to study in London and Switzerland before settling in Berlin in the late 2000s, where he formed his first indie rock band with German, French, and Australian musicians. However, as often happens in the lives of musicians, a parenthesis appeared in the form of a musical hiatus in Paris. It was during this time that the pseudonym DeSaintex was born, and he released two EPs, Je vois, je crois (2019) and Effigies (2020).