In this scene we see Wall-E and Eva Fly about space where Wall-E presents the plant that they needed to save the ship, Eva was super happy about this and hugs Wall-E where they soon go on a romantic flight around the ship dancing to the music that is playing over the scene.
Wall-E doesn't have much dialogue due to the main protagonists being robots except for when the humans talk between each other. Wall-E and Eva do use sounds to communicate but the only sounds we can really recognize is when they call each others name. In this scene we see Eva and Wall-E communicate through actions but they do call each other by their names. Further on, later in the scene we see the captain here he is communicating with the ship to learn more about earth... we also see a bit earlier two characters that pop up in the movie a couple times talk to each other for the first time thanks to seeing Wall-E and Eva. In this scene we see a good example of ambiance with props such as the fire extinguisher what is the main used item... Here it sets the atmosphere for what is happening it allows the demographic to feel more immersed in what is happening. One more really important factor is that whenever Wall-E moves you can hear the sounds of his joints rolling to allow him to move helping portray him even more as a robot.
Non- diegetic sounds include sounds like music, redubbing, ADR and foley... these are commonly included to create certain sound effects what we will cover more down below for this scene. The Wall-E clip that is provided above can be seen as a non- diegetic This is because the dialogue that is being spoken has been recorded separately and placed over where they have spoken also for majority of the scene a music plays over the clip while Wall-E and Eva dance around the spaceship. The music that is playing isn't a normal song that you find on the top charts but a song composed of different instruments and beats placed to create a certain atmosphere. More on the soundtrack the aesthetic it creates is a romantic sweet experience for the audience it shows how pure and sweet Wall-E and Eva's love for each other is, While dancing around the spaceship you see them chasing each other but not in a hurried way but more of a elegant glide that keeps in pace with the music furthering this effect.
During the clip you can see where the post production also comes into play like the silence in space this helps create a bigger impact during the scene... Post production during a scene is very hard to notice is there unless you have a good ear or you really listen, it's where anything in the sound has either been taken away from the clip or been modulated such as dialogue or ambiance it's used to portray different methods for the film. Another good example of this is when the main protagonists are talking in space their voices are more reverbed because of the setting they are in. There is also a good use of sound effects when Wall-E is using the fire extinguisher to race around in space you can clearly hear the fire extinguisher and how it pans from one ear to the other to create the illusion of it getting closer to the screen, this is also ambiance what I had talked about earlier. When the robot that controls the ships appear you can also hear the use f sound effects when he presses buttons or moves about.