Ambient Sound Actor
The Ambient Sound Actor (icons pictured at left) can be used for many purposes such as ambient looping sounds as well as non-looping sounds.
Generally, the Ambient Sound Actor conforms to the real world where the closer you are to a sound, the louder it will appear. By comparison, a sound that is normally loud, may appear soft if it is further away.
If the Ambient Sound Actor is set to Auto Activate, it will immediately begin to play once it is created (at the beginning of play or on spawn), even if the player is not in a position to hear it. The sound asset the Ambient Sound Actor points to will only play once per trigger unless specified as Looping in the Sound Wave or defined as part of a Sound Cue asset.
You can add an Ambient Sound Actor to your level in several ways:
The first is by selecting the Ambient Sound Actor from the Modes panel under All Classes and dragging and dropping it into your level as seen below.
You can also highlight a Sound Wave or Sound Cue in the Content Browser and in your level, right-click to bring up the context menu and select Place Actor.
Lastly, you can simply left-click and drag a Sound Wave or Sound Cue from the Content Browser into your level.