Microsoft is making a tech-demo version of its upcoming DirectX 10.1 available via download, including a version of XAudio2, the company's cross-platform replacement for DirectSound. Users can try out both via the 468-Mbyte version of the August 2007 DirectX SDK. There's a catch, though: the August 2007 Direct3D 10.1 Tech Preview requires the Windows Vista SP1 Beta which will be available to MSDN subscribers once it is publicly released, according to Microsoft.

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