Ambiences or atmosphere (atmos) re-create the sense of a particular space. For example, a cathedral has a certain atmosphere which can be the product of certain background sounds in combination with the acoustics of that space, which give it its characteristic sound. Atmos also set the general tone of the space that the player is in. One example that shows the impact of ambience is ‘Limbo‘ by Playdead studios. In this case, Martin Stig Andersen (the lead audio designer for the game) also combines the ambience with music to take a similar approach used in films.
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