"Antonio Huerta" wrote in message
...

-- Games like Bioshock use EAX 2.0-5.0, which is a fancy way of saying
that the game engine generates directional sounds and pumps through
2-5 speakers. Quality of sound reproduction improves. (One of the
features of EAX is that the sound can reflect several time in a
corridor from a stone wall or other material, and one can hear that.)

Another EAX feature is audio 'occlusion'... i.e., sounds coming through
some sort of barrier such as a wall sound are filtered such that the low
frequencies make it through the wall, but not the high frequencies. Stand
outside hangar's wall in BF2, for example, and you can hear the low muffled
rumble of grenade explosions and whatnot going off inside the hangar, but
not alot of the high-pitched popping of small arms fire.