Using AudioRender device as Input for AudioGraph UWP

问题

I have a fully functional AudioGraph system in place for a realtime voice chat. You can select the AudioCapture and AudioRender devices before and during the chat however I'd also like to be able to use Audio from the AudioRender devices for input on the AudioCapture graphs. How can I go about that?

I currently have tried just selecting the device with the device Id however it gives the error: "DeviceNotAvailable".

for

CreateAudioDeviceInputNodeResult result = await ingraph.CreateDeviceInputNodeAsync(MediaCategory.Media, nodesettings.EncodingProperties, selectedDevice);

selectedDevice being

selectedDevice = await DeviceInformation.CreateFromIdAsync(InputDeviceID);

回答1:

Derive from official document remarks segment,

Call FindAllAsync, passing in the value returned by GetAudioCaptureSelector, to get the list of DeviceInformation objects representing the available capture devices. For more information, see Audio graphs.

Windows.Devices.Enumeration.DeviceInformationCollection devices = await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(Windows.Media.Devices.MediaDevice.GetAudioRenderSelector());

For more please refer Audio graphs document.

来源：https://stackoverflow.com/questions/53026841/using-audiorender-device-as-input-for-audiograph-uwp