How The Wild Robot Makes Roz Sound Alive

Roz is built as a machine, and the team designing her movements tried an unlikely source: the breath of a person at a microphone. Randy Thom, the supervising sound designer on The Wild Robot, wanted to get away from the familiar electric whine of a screen robot. He experimented with sounds that suggested air or fluid under pressure. In a Skywalker Sound feature, he recalls recording himself breathing and blowing to see what else might fit. Listen for an air-like release around a movement, then see whether you can tell what made it. The feature tells us what Thom tried. It does not identify the recording you hear at any given moment.

DreamWorks’ film begins with a robot stranded on an island with animals. Roz, voiced by Lupita Nyong’o, eventually takes in an orphaned gosling named Brightbill. The story gives her a job she can describe in a sentence and a relationship she has no ready vocabulary for. Sound can carry some of what she has trouble putting into words. Three passages show how. There are spoilers through the migration sequence.

Hear the air in Roz’s movements

The usual motor whine can establish what a robot is in half a second. That makes sense if the sound has a small job, such as telling you that a machine in the background is switching on. Roz has to move through most of a movie. A sound that draws the same amount of attention every time she shifts her weight would leave the other sounds in the scene fighting to be heard. For her, the sound also needs to suggest the amount of work a particular movement takes.

In his Skywalker Sound feature, Thom describes trying pneumatic and hydraulic effects. Think of the brief hiss when air escapes under pressure. It has a start, a swell and a tail. You can give a small movement a quick puff or let a bigger one take a little longer to settle. A breath from a person has some of that same shape. Thom credits Foley artists Ronni Brown and Jana Vance with helping build a library of such noises. Foley is the work of performing sounds for physical actions in a film, from footsteps to the movement of objects.

Try listening in two passes. At first, follow the picture and notice what part of Roz’s body seems to be doing the work. Then back up and listen for what gives the action its weight. Some cues are easier to hear as a change in pressure than as a recognizable recording. The feature explains what the team put into the sound library. The finished mix leaves the origin of any particular puff open to the ear.

Nyong’o’s dialogue offers a second way to hear the design. Thom says re-recording mixer Gary Rizzo used subtle processing in places, including when Roz first boots up. The team found its way toward Nyong’o’s natural voice as it experimented. At startup, the processing gives you a quick sense of a machine coming online. As the performance gets more room, the pause before an answer and the weight Nyong’o puts on a word can carry more of the scene. Listen for the point at which you start paying attention to what she is trying to say.

Give the shore a moment

Thom recalls that the film’s writer and director, Chris Sanders, wanted the island to feel like a character. Thom points to his earlier work on the soundscape of Cast Away as a reference. In describing Roz’s time by the sea, Thom singles out waves washing over rocks. He points to how much a sound that ordinary can do to convey loneliness.

A useful way into those passages is to follow the water through one complete rise and retreat. Try taking your attention off Roz and giving it to one wash of water. Does your sense of the scene’s pace change? Compare the time you spend listening to the shore with the time you spend following one of Roz’s gestures. Thom’s account gives you a reason to try it: the waves were a way for his team to suggest that she was alone.

Waves can be soothing in another story. On their own they can’t tell you how Roz feels. Try asking whether the waves make you feel close to Roz or make you notice the distance around her. A line of dialogue could name the feeling in a few words. Listening without waiting for a line lets you consider what the shore might be doing on its own.

How the score helped shape the migration sequence

At his BAFTA screenwriting lecture, Sanders described Brightbill’s early milestones in plain terms. The gosling needs to learn to eat, swim and fly in time to migrate. That is the practical problem in front of Roz. Seen as part of the migration story, those milestones do two jobs. They prepare Brightbill for the journey and give Roz something concrete to teach him before it begins.

Sanders said he asked composer Kris Bowers to write the migration music without watching the picture. He then boarded the sequence to what Bowers wrote. Storyboards lay out the action in images, so that decision let the music help determine how the passage would unfold. Separately, Sanders estimates that the film has about half as much dialogue as he would normally expect in a movie of this kind. He describes that restraint as part of giving the island story time to unfold.

Listen for where the music seems to have room to finish a thought. One way to get at it is to watch the sequence first with the volume down and mark the action you can still follow. Brightbill’s practical goal is easy to see. Then put the sound back and notice where you feel the scene gathering momentum or making room for a beat to land. The difference is a way into what Bowers contributes. On a second listen, notice which change in the score you remember best after the sequence is over.

If you pick just one sequence for a second look, start with the migration flight. You already know what Brightbill has been learning, so you have some attention to spare for the score. When you go back to Roz’s startup, listen for how close that first sound seems to put you to her moving body. As the migration sequence plays, see whether your attention shifts from what Roz taught Brightbill to what the music is doing.