Tim Kiefer is one of two music composers on Adventure Time, along with Casey James Basichis. He DJs and releases music under the alias Staypuft.
Basichis and Kiefer formed the conceptual pop duo "Casey James and the Staypuft Kid" in 2007, and have since released three albums and scored the feature film Spork. In addition to Adventure Time, the two have composed for Bravest Warriors, another cartoon series created by Pendleton Ward.