3. What does a production sound mixer do? Which responsibility of a production sound mixer do you think sounds most difficult and why? A production sound mixer has many duties, he has to announce each take that is being films, he also is responsible for recording voice-overs/wild lines. In my opinion the most difficult is recording the wild lines because the dialogues and all the film lines are in your hands, it's a lot of responsibility and you need to be very organized to keep track of all the lines you need to record and make sure that everything sounds right.

The production sound mixer has various jobs around the studio, such as slating, wild lines, voice-overs, and background sound effects. Their hardest is likely slating, which requires a bit more precision than their other jobs.

Explanation:

"What does a production sound mixer do? Which responsibility of a production sound mixer do you think sounds most difficult and why?"

Straight from the lesson related to this question:

In getting sound right for a film, equipment is only part of the story. People are also needed to best use that equipment... On smaller-budget films, the filmmaker may select a production sound mixer who has his or her own equipment as this choice can save the filmmaker a considerable amount of money in sound equipment rental, and the mixer is likely to be skilled in using his or her own equipment.

In short, the production sound mixer is a person hired to mix sounds together in a film production. They have several responsibilities, such as those included in the passage below:

The responsibilities of the production sound mixer position can vary, again depending on the film's budget, needs, and size of crew. However, the production sound mixer does perform certain functions for almost every film. For example, s/he announces each take that is filmed and is responsible for slating. Slating is the use of the film slate, also called a clapboard, which shows specific information about each take, such as the date, director, production, scene number, and take number.

The production sound mixer can also be responsible for recording voice-overs, which are actors' lines that are not spoken by the actors within the scene... The sound mixer also records what are called "wild lines," which are lines that the actors repeat because the originals were not spoken or recorded clearly enough for the film's needs. He or she may not necessarily be responsible for creating the sound effects, but he or she may be responsible for recording the sound effects that someone else creates.

The production sound mixer has various jobs around the studio, such as slating, wild lines, voice-overs, and background sound effects. Their hardest is likely slating, which requires a bit more precision than their other jobs.

Quotes from FLVS.