Seems that we missed the news that RightMark has a new tool out called 3DSound version 1.0. In general RightMark Audio analyzers are independent audio measurements open-source projects developed by the iXBT.com / Digit-Life team. This is the first public version and a pre-release one:

DirectSound-diagnostics: the conclusion is hardware supported functions for the selected DirectSound-device; check of presence of EAX1, EAX2, EAX3 support; subjective test of DirectSound3D positioning, with vertical plane support; EAX2, EAX3 reverb, occlusions and obstructions; CPU utilisation test at various number DirectSound- and DirectSound3D-buffers, and also with EAX2 reverb; special statistical data processing of CPU utilization, with average and dispertion values.

Download RightMark 3DSound v1.0