I think Doom 3 added Dolby Digital Sound (or possibly at least 5.1 audio) in a patch.
In general, Mac games skimp on the DDS and 5.1 audio from what I understand. There was a long thread in the Inside Mac Games forums about this a while back. Maybe you can find it?
I think World of WarCraft has 5.1 support, but I'm not certain.
Well, as far as that goes, 5.1 can either be Dolby Digital or Digital Theater Surround (aka DTS), or some faked simulated surround sound.
I hope it's the real thing. I'll do some digging.
Well, it didn't take long to find the patch, on filefront, where it specifically mentions 5.1 OpenAL support for OSX and external sound cards (like the FireWave I imagine?). The patch is compatible with OSX versions up to 10.4.
Plus, a link to specs on the Firewave mentions WoW and UT2k4 for Mac as having 5.1 dolby digital surround.
Hot. A great start.
Just found two more additions - UB versions of Jedi Academy and Jedi Outcast take advantage of it.
Also, apparently Quicktime supports it via Coreaudio, so if you play some movie trailers on quicktime.com that are DD encoded Like the HD Harry Potter trailer, it plays back in full DD surround!
(Via the Firewave or similar device)
From unanalog.com I found that Call of Duty 2 features OpenAL sound, Apple's page lists X2: The Threat as an OpenAL title, but doesn't specify DD. I imagine X3 might use it too. From garagegames.com I found that Dark Horizons: Lore Invasion supports OpenAL 3D audio.
From the openal.org page:
Albert's Armageddon (where it lists multiple formats it's not a given that the Mac one will use it as the Linux or windows version does)
Alien Flux
America's Army: Operations
A Tale in the Desert II
Battle Just Started
Bridge Construction Set
Escape From Monkey Island
Eternal Lands
Flight Gear
Gish
Harry Potter and the Chamber of Secrets
Legends
Marble Blast
Massive Assault
Megacorps Online
Minions of Mirth
Orbz
Planeshift
Postal 2
Scorched 3D
Stubbs the Zombie
Supertux
Think Tanks
TORCS
Tribal Trouble
Trigger
Ultratron
VDrift
Vega Strike
Wurm Online
X-Plane
Zap!
Now, clearly the presence of OpenAl can't mean these all play back in dolby 5 channel surround sound on a Firewave connected to a 5.1 speaker system does it? Probably not?
Anyone in a position to verfiy any of these?