The duo of Guillaume Grosso and Jeremy Duval is a French electronica duo. Eschewing the absurdly sophisticated clicks and cuts and dementedly chiselled drills of their contemporaries, Principles instead take the emotional route, and develop an accurate and refined cocoon of vintage synthesizers, spanners, majestic basslines and, as jacked as it may sound, Wagner-like harmonies. Self confessed music geeks, the duo has toiled in the least glamorous section of the advertising industry, in the northern city of Lille.