Harle is a founding member of the PC Music collective alongside A.G. Cook and has continued to be an integral figure in the development of the hyperpop sound, writing and producing for artists such as Charli XCX, Caroline Polachek, Claire, Rina Sawayama, 100 gecs, and Perfume Genius. His music is often credited as the more chart-friendly work from PC Music. In 2021, Harle released “Harlecore” on Mad Decent, a high-concept rave album which takes place in a virtual multi-room club inhabited by four fantastical DJs. The album has a much stronger EDM, rave sound than his previous work with A.G. Cook.