The National Audio Theatre Festivals, Inc. (NATF) is a US-based organization sponsoring a yearly, five-day workshop on radio drama, voice-over and the audio arts, as well as other special training. Participants take classes on subjects such as voiceover and voice acting, audio engineering, Foley and special effects, audio playwriting and podcasting, and more. The workshop is helmed by professionals in the field and is frequently held in the small city of West Plains, Missouri.