[farshizzo]

This is not currently possible. If you want ambient sound then you will need to use the non-3D sound features. You can manually decrease the volume of the sound as you move away from the specific area. Here is how you would create a sound object:

ambient = viz.add('BusyStation.wav',loop=True)
ambient.play()

You can also set the volume using the following code:

ambient.volume(0.5) #Set volume to 50%