direct (A3Dspace) and reflected (A3Dverb) sound streams (A3D 2.0 can perform up to 60 first-order reflections). EAX 1.0, the competing technology at the time promoted by Creative Labs, simulated the environment with an adjustable reverb—it didn't calculate any actual reflections off the 3D surfaces. A3D was supported by 3DMark along with many other software titles of the late 1990s, including Half-Life, Unreal, Quake II, Soldier of Fortune, Jedi Knight, SiN, Quake III Arena (up to version 1.25), Unreal Tournament and Star Trek: Voyager – Elite Force. Following Aureal Semiconductor's acquisition by Creative, support for the API was discontinued. See also Sensaura DirectSound Dolby Atmos HRTF (head-related transfer function) References External links "Power struggle forced Aureal walkout" - ExtremeTech interview with Kenneth 'Kip' Kokinakis (President, CEO) Arstechnica Audio Review Vista Driver For Vortex 2 (AU8830) Chipset 3D Audio Revolution - A legacy web site featuring news about Aureal and its A3D technology. Vortex of Sound - A3D Resources - An old website with information, drivers, news etc about A3D. Audio equipment manufacturers of the United States Sound cards American companies established in 1995 American companies disestablished in 2000 Defunct computer companies of the United States Manufacturing companies based in California Technology companies based in the San Francisco Bay Area Companies based in Fremont, California Computer companies established in 1995 Computer companies disestablished in 2000 Manufacturing companies established in 1995 Manufacturing companies disestablished in 2000 Defunct companies based in the San Francisco Bay Area Creative Technology acquisitions