Originally posted by: Sylvanas
It is my understanding that all the latest onboard audio solutions all have a minimum of EAX 2.0 (as all non Creative sound cards do) so audio in games is certainly not lackluster. I have not noticed any considerabe benefit in audio quality in games with higher spec EAX effects present on the latest X-FI's from playing Crysis/UT3 on my friends rig who has the same speaker setup.....it's subjective however I'm just noting my experiences.
It's not minimum EAX 2.0 support, but maximum. Creative is not licensing EAX3 or 4 to 3rd parties unless they manufacture Creative's own chips. And even then they can only use the latest EAX APIs on Creative's own chips. One such example is Auzentech X-Fi. a card manufactured by Auzentech, but uses Creative's X-Fi chip.
Not even the latest HD audio chip from Realtek supports anything newer than EAX2. If you've had an onboard audio and have had EAX effects enabled in games, disable them just for kicks and compare audio. If EAX3 or EAX4 mode works, chances are that the newer EAX calls are simply ignored.
I don't know any onboard audio solution that can do 3D audio effects properly and sound good while doing so. This is similar to integrated graphics, while they claim to support many, if not most effects, the support or performance is poor compared to dedicated cards.
In any case, let your ears be your judge. Enable 3D effects in games if you think they really do sound better than plain stereo. Just bear in mind that if you ever have audio issues, this is the most probable cause.
With the release of Vista things have changed much. It is my understanding that EAX will be dying, slowly but still dying. In Vista Microsoft abandoned DirectSound3D, and thus EAX is not working. Creative goes around with this issue by providing a seperate software called Alchemy that translates EAX calls to OpenAL calls. What is a mystery to me is how well do onboard HD audio chips support OpenAL, if at all.