The Re-Recording Mixer (Dubbing Mixer in the UK) is the specialist who mixes all the audio tracks supplied by the sound editors (including 'live sounds' such as Foley) in a special Re-recording or Dubbing Suite. As well as mixing, he introduces equalization, compression and filtered sound effects, etc. while seated at a large console. Usually two or three mixers sit alongside, each controlling sections of audio, i.e., dialogue, music, effects. -
https://en.wikipedia.org/wiki/Sound_editor_(filmmaking)--------
A re-recording mixer in North America, also known as a dubbing mixer in Europe, is a post-production audio engineer who mixes recorded dialogue, sound effects and music to create the final version of a soundtrack for a feature film, television program, or television advertisement. The final mix must achieve a desired sonic balance between its various elements, and must match the director's or sound designer's original vision for the project. -
https://en.wikipedia.org/wiki/Re-recording_mixer--------
Dubbing, mixing, or re-recording is a post-production process -
https://en.wikipedia.org/wiki/Dubbing_(filmmaking)