Adapter drivers should not register themselves in this category.Ī SysAudio client can treat a filter factory for a virtual audio device similarly to a filter factory for a hardware or software component. SysAudio reserves the registry category KSCATEGORY_AUDIO_DEVICE exclusively for its virtual audio devices.
The KsStudio utility in the Windows Driver Kit (WDK) is an example of an application that bypasses SysAudio and allows users to construct filter graphs manually.įollowing PnP device enumeration, SysAudio takes stock of the registered audio hardware and software components in order to determine how to construct the various audio filter graphs that its clients might require.Īfter determining the list of filter graphs that it can build from the available hardware and software components, SysAudio registers these graphs as virtual audio devices for playback, recording, MIDI input/output, and mixing. SysAudio's clients include DirectSound and the WDMAud system driver, which serves as the interface between WDM audio drivers and the audio-specific Microsoft Windows Multimedia APIs waveIn, waveOut, midiIn, midiOut, mixer, and aux (described in Microsoft Windows SDK documentation). The system audio driver (SysAudio) uses the available hardware and software components to determine the filter graphs to build.įor more information about the system audio driver, see SysAudio System Driver. – Apple M1 Silicon CPUs.Virtual audio devices represent the filter graphs that render and capture audio content. Minimum requirements Operating systems supported Whether you need to transmit video over VLC, edit live-to-air with renderless playback on Adobe Premiere, or output real-time audio and video frame buffer from Final Cut Pro, our suite provides easy-to-use plugins that integrate NDI into the apps and software you already use.
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