Whilst Revolution offers an elevation control, our brains are less sensitive to locating the height of a sound
source. (There are no changes in audio delay due to elevation which is the main cue we use for location.)
The 3D effect will not work with mono speakers (such as mobile phones) although the 3D audio will mix down
to mono reasonably well.
The minimum distance from the listener is 2 metres, which gives around 6ms delay. The algorithms cannot
produce lower delays without excessive CPU load.
