The audience can watch a film with bad cinematography, but it cannot listen to a film with bad sound.
The Sound Recordist has one of the most important jobs on set. Sound is pivotal to making a good film.
Where there are two people in the on-set sound department, the Head of Department (HOD) is the Sound Mixer. They work with a Boom Operator.
Where there is only one person in the on-set sound department, they are the Sound Recordist.
The Sound Department works with a digital audio recorder (e.g. Zoom H4N or Zoom H6N); microphones; boom pole; and lavalier mics. They ensure that the dialogue is clear. They record additional sound for foley, with the aim of making the Sound Designer’s job easier. They keep a sound record for each take.
The Sound Mixer monitors the sound. They ensure sound levels are high enough (between -12dB and -6dB) and that sound does not peak. They work with the Script Supervisor to ensure correct records are kept on set; they may even keep their own.
The Boom Operator places the microphones to ensure best sound recording. They work with the Camera Operator to ensure the microphone is out of frame. They set up lavalier microphones on the actors.
The Sound Recordist does both of these tasks. They set up the microphone, operate the boom, record on the digital audio recorder, monitor sound, and maintain a sound record for each take.