Johann Theo (or just Theo) creates music, games, and music for games under the alias treehann. He has been immersed in electronic music since early childhood and has published compositions on the web since 2009 where he began on 8bitcollective.

Starting with chiptune/tracker music, the treehann style has moved toward more modern directions: Influenced by producer-DJs (Ivy Lab, Lone, Submerse), pioneers (Aphex Twin, Kraftwerk), game composers (Disasterpeace, Nifflas, 4mat, Nobuo Uematsu), and a variety of math rock, jazz, and metal acts (Yvette Young, BadBadNotGood, SikTh), it explores dance, experimental sound design, hypnotizing ambiance, as well as unexpected time signatures and flavorful chords.

When he is not listening to, whistling, or writing music, Theo is inventing games for his cats, attempting to communicate with birds, compulsively organizing things, and religiously employing the Oxford comma.