How to enable low-latency playback (Windows Runtime apps using C#/VB/C++ and XAML)
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This topic assumes that you can create a basic Windows Runtime app using C++, C#, or Visual Basic. For help creating your first app, see Create your first Windows Store app using C# or Visual Basic.
The RealTimePlayback enables the media element to reduce the initial latency for playback. This is critical for two-way communications apps. And can be applicable to some gaming scenarios. Be aware that this mode is more resource intensive and is less power-efficient.