Support for instantiating XAudio2 by CoCreateInstance has been removed. XAudio2Create is a flat Win32 API call and no longer creates an XAudio2 CLSID.This version supports Windows Store app development the XAudio2 API can be used in C++/DirectX Windows Store apps.XAudio2 2.8 has been updated with the following changes: We recommend to use the Windows Software Development Kit (SDK) for Windows 8 to develop against XAudio2 the Windows SDK for Windows 8 contains the necessary header and import library for statically linking against XAUDIO2_8.DLL. It is available “inbox” and does not require redistribution with an app. XAudio2 version 2.8 ships today as a system component in Windows 8, XAUDIO2_8.DLL. The ReverbConvertI3DL2ToNative function now includes the boolean sevenDotOneReverb parameter enabling 7.1 reverb.XAUDIO2FX_REVERB_PARAMETERS now includes the value SideDelay for 7.1 systems.The CreateHrtfApo function is supported in the Windows 10 version of XAudio 2.9.xWMA support is available in this version of XAudio2.New creation flags: XAUDIO2_DEBUG_ENGINE, XAUDIO2_STOP_ENGINE_WHEN_IDLE, XAUDIO2_1024_QUANTUM.XAudio2.9 has been updated with the following changes:

A redistributable version of XAudio 2.9 is also available for Windows 7 SP1, Windows 8 and Windows 8.1. XAudio2 version 2.9 ships as part of Windows 10, XAUDIO2_9.DLL, alongside XAudio 2.8 to support older applications. XAudio 2.9 (Windows 10 and redistributable for Windows 7 and Windows 8.x) On Windows, XAudio2 is provided as a Dynamic Link Library (DLL) installed into the system folders of the Operating System. On Xbox 360, XAudio2 ships as a static library that is compiled into the main game executable. XAudio2 is a cross-platform API that has shipped for use on Xbox 360 as well as versions of Windows, including Windows XP, Windows Vista, Windows 7, and Windows 8.

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