In-game communication between users (New category in Windows 10) Movies, video with dialog (Replaces ForegroundOnlyMedia)ĭefault category for media playback (Replaces BackgroundCapableMedia) In Windows 10 there are nine audio stream categories. In order to inform the system about the usage of an audio stream, applications have the option to tag the stream with a specific audio stream category. The following table shows the audio categories in Windows 10. Audio drivers will be able to define different type of audio formats and processing, based on the stream type. Supporting additional modes is optional.ĭedicated modes for speech, movie, music and communications. Skype, Lync)Īudio device drivers need to support at least the Raw or Default mode. Music audio playback (default for most media streams) This mode defines the default audio processing. An application can request a raw stream that is completely untouched and perform its own signal processing. Raw mode specifies that there should not be any signal processing applied to the stream. The modes are summarized in the table shown below. OEMs and IHVs can determine which modes they want to implement. Windows defines seven audio signal processing modes. Signal Processing Modes and Audio Categories Signal Processing Modesĭrivers declare the supported audio signal processing modes for each device.Īudio categories (selected by applications) are mapped to audio modes (defined by drivers). Register the driver resources (interrupts, threads), so that they can be protected by the OS in low latency scenarios.įor more information, see Low Latency Audio.Improve the coordination for the data flow between the driver and the OS.Declare the minimum buffer size that is supported in each mode.In order for audio drivers to support low latency, Windows 10 provides the following 3 new features: In addition, streams will be prioritized, in order to ensure that high priority streams (e.g. ![]() The audio stack supports multiple packet sizes and dynamic packet resizing, in order to optimize the tradeoff between latency and power based on the user’s scenario. If a driver supports 3ms audio buffers, then the roundtrip latency is ~10ms. In addition, if the driver has been updated to take advantage of the new low latency DDIs that use small buffers to process audio data, then the latency will be reduced even more. Without any driver changes, applications in Windows 10 will experience 4.5-16ms lower latency. In Windows 10 work was done to reduce the latency in the OS. The total latency of a device is the sum of the latencies of the following components: ![]() Having low audio latency is very important for several key scenarios, such as the following. Signal Processing Modes and Audio CategoriesĪudio latency is the delay between that time that sound is created and when it is heard. Here are the new audio features in Windows 10. This topic provides a high level summary of what's new in audio for Windows 10.
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