Howell is the composer for a majority of the episodes on South Park. For some episodes, he also serves as the supervising audio editor or the audio producer. On South Park: Bigger, Longer & Uncut, his role was supervising audio editor, and he also produced several of the songs for the movie's soundtrack.
Voices on South Park
- Uncle Murray - "Ike's Wee Wee"
- Mr. Wyland - "Cherokee Hair Tampons", "Chef Goes Nanners"
Additional South Park Roles
Howell produced the following tracks for South Park: Bigger, Longer & Uncut's soundtrack:
Howell appeared in the Goin' Down to South Park mockumentary back in 1999.
- That's My Bush! - 2001 - Sound Editor
- Team America: World Police - 2004 - Supervising Sound Editor
- Sweetwater Tides - 2004 - Sounds Mixer
- The Big Elle - 2014 - Sound Editor