Status: Closed (Complete)
- Interactive 3D Audio Level 2 (I3DL2) v 1.0a (pdf) 10/1999
- I3DL2 C++ Header Files (zip) 10/1999
- Interactive 3D Audio Level 1 (I3Dl1) v 1.0 (pdf) 6/1998
- 3DXP DirectSound 3.0 API (pdf) 6/1997
November 1999 -- The group focused on creating 3D Audio rendering guidelines to define more realistic audio environments. This effort lead to extensions to the Microsoft DirectSound 3.0 API to enable hardware acceleration, and to the publication in 1998 of the IASIG Interactive 3D Audio Rendering and Evaluation Guidelines (Level 1), describing "minimal acceptable" 3D audio features for all platforms. In 1999 the group documented enhancements to current 3D audio technology, such as Reverb parameters, object reflections and occlusions, and more, published as the IASIG Interactive 3D Audio Rendering Guidelines (Level 2). The I3DL2 document details the 3DWG's recommended approach to providing state-of-the art Interactive 3D audio using a pre-set reverberation to simulate a common environment for sound source and listener. Occlusion and obstruction effects are also specified. An example API implementation (two 'C' header files) is included in the specification. enumerating a recommended "DirectSound Property Set" implementation of the low level I3DL2 source and listener controls. The Property Set also includes a number of useful presets for rooms and material types for occlusions and obstructions.