A dubbing mixer, also known as a re-recording mixer, is a member of a post-production team responsible for editing together dialogue, music, and sound effects to create the final soundtrack for a production.
Dubbing mixers ensure the sound in a film or television program is technically correct and as near to the director's or original idea as possible. They achieve this by performing tasks such as mixing and cross-fading the sound, using the soundtrack prepared by the music editor.
In practice, the dubbing mixer is the head of the post-production division of the sound department. In the BBC Wales era, this title has almost exclusively been held by Tim Ricketts and Mark Ferda, with a few other very occasional substitutions. Howard Bargroff would succeed them.