How do I use audio volume?

I want to have a stereo sound playing only in a certain area. I’m trying to use audio volume for this but there’s no option to insert audio on it.

Documentation has nothing about audio volumes.

Help?

An alternative to using an audio volume for this particular affect would be use the attenuation setting of a sound cue. You can set these in the sound cue asset details panel. Using this you can set a particular area that you should hear a sound, and even control its fall off. Some good documentation on the subject can be found in the following.The last link does mention audio volumes as a means to further control attenuation and a useful tip that you need to rebuild the level before any changes to the audio volume will take place.