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DirectSound exposes hardware-accelerated 3D mixing for WDM audio miniport drivers that meet the following requirements:
The pin must meet the requirements listed in Supporting 2D DirectSound Acceleration in WDM Audio.
The pin should include a 3D node (KSNODETYPE_3D_EFFECTS) in its node chain. (See DirectSound Node-Ordering Requirements.)
The pin must support the KSPROPSETID_DirectSound3DBuffer property set on the 3D node.
The pin must support the KSPROPSETID_DirectSound3DListener property set on the 3D node.