Universal Audio Sound Cards & Media Devices Driver

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SYSVAD Audio Sample

System Virtual Audio Device Driver Sample (SYSVAD)

Universal Audio Sound Cards & Media Devices Driver

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The SYSVAD driver highlights many important features of the WDM audio architecture. These are working implementations with source code that can serve as a starting point for writing a custom driver for a proprietary audio device.

The sysvad solution file contains the following projects.

TabletAudioSample
The TabletAudioSample project demonstrates how to develop a WDM audio driver that exposes support for multiple audio devices. Some of these audio devices are embedded (speakers, mic arrays) in the system while others are pluggable (headphone speaker/mic, Bluetooth headsets speaker/mic). The driver uses WaveRT and audio offloading for rendering devices. The driver uses a 'virtual audio device' instead of an actual hardware-based adapter and highlights the different aspects of the audio offloading WDM audio driver architecture. For more information about the Windows audio engine, see Hardware-Offloaded Audio Processing (Windows Drivers).
EndpointsCommon
The EndpointsCommon project contains common code to both the tablet and phone. For more information, see Universal Windows Drivers for Audio.
SwapAPO
The SwapAPO project demonstrates how to develop audio processing objects. It includes sample code that demonstrates how to register and unregister audio processing objects, and also shows how to customize a Control Panel property page to reflect the available features in the processing object. For more information, see Windows Audio Processing Objects.
KeywordDetectorAdapter
The KeywordDetectorAdapter project demonstrates how to develop a keyword detector adapter. For more information, see Voice Activation.

Download and extract the Sysvad audio sample from GitHub

The SYSVAD audio sample is available on the Windows Driver Samples GitHub.

You can browse the Sysvad audio sample here:

Follow these steps to download and open the SYSVAD sample.

a. You can use GitHub tools to work with the samples. You can also download the universal driver samples in one zip file.

b. Download the master.zip file to your local hard drive.

c. Select and hold (or right-click)Windows-driver-samples-master.zip, and choose Extract All. Specify a new folder, or browse to an existing one that will store the extracted files. For example, you could specify C:DriverSamples as the new folder into which the files will be extracted.

Sound Card Driver Download

d. After the files are extracted, navigate to the following subfolder.

C:DriverSamplesAudioSysvad

Open the driver solution in Visual Studio

In Microsoft Visual Studio, Select File > Open > Project/Solution... and navigate to the folder that contains the extracted files (for example, C:DriverSamplesAudioSysvad). Double-click the Sysvad solution file to open it.

In Visual Studio locate the Solution Explorer. (If this is not already open, choose Solution Explorer from the View menu.) In Solution Explorer, you can see one solution that has six projects.

Archived Audio Samples