Seppl Kretz kicked off his journey touring internationally with indie and psychedelic bands, playing synths and organ. When one of his songs landed a spot in a Super Bowl commercial, it ignited his passion for music in media, leading him into music production and supervision for advertising and film.

As a Creative Music Director, he has earned global recognition, winning prestigious awards like Cannes Lions, D&AD, Eurobest, and more. His work with brands such as Heineken, Diesel, and Schweppes has been widely acclaimed.

In 2022, Seppl co-founded Magma Music Agency with Michael Bertoldini. In just two years, the company expanded from a two-person team to a ten-member company, establishing itself as a leading force in sync, music production, and supervision, known for its avant-garde approach and devotion to excellence.