3D Sound - no rolloff? I'm trying to use the rolloff effect in 3D sound, but am having trouble. I have a near sensor which is triggering properly, but no matter where the character stands in my scene, there is no rolloff to the sound -- it's either on or off. Here's the settings. I can't find any decent documentation on this, and the properties don't seem particularly intuitive. 

These are my settings:
A more detailed documentation on the 3D sound options you find in the Wiki on Sound Actuator it illustrates the meaning of the cone and all the options.

A older post mentions that 3D sound only works with mono (WAV) files. if this still applies you could convert your sound with a tool like Audacity.

I edited the file from the post mentioned above and needed to adjust some values in order to hear anything and uploaded it here.