They use sounds from old video games to create their music.
The idea is to use music and sound as a background.
Often music described a feeling or told a story using sounds.
But we can't see any way that they could have used sound for communication.
A small number of clocks will use sound to show the time.
We've been used to making a certain type of music and using sounds to accomplish that.
"Hollywood has always known how to use sound to control emotions, right?"
Two other films with this title, but using sound, were produced in 1930 and 1937.
There he was trained to use sound as a diagnostic aid.
Some fish may use sound to communicate with their young, and to signal danger.