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I have one communication application, now I share my desktop and audio to other people.
I use wasapi to capture the system's audio, but the captured audio contains the mix of all audio being played, so it contains other people's voice too.
If I share this mixed audio to other people, he would get echo.
Is there any api to capture the mixed audio and exclude my application's audio?
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Here is an example of loopback-mode audio capturing. It's also be a good idea to read Chrome source code directly if Chrome has a solution.
The chrome source code is too complex, I still don't know it's solution even I have cost some hours on it.
I have checked the HRESULT WASAPIAudioInputStream::InitializeAudioEngine() in chrome source code and It‘s almost the same as Capturing a Stream. And according to Loopback Recording,
WASAPI loopback contains the mix of all audio being played, regardless of the Terminal Services session the audio originated from. For example, you can run a loopback client in a service running in session 0 and capture audio from all user sessions, as well as audio being played from session 0.
Capturing all audio is a expected behavior, isn't It?
The behavior isn't I except. I hope I can capture all audio stream except my application
Have you found a solution?
Benefited to (Loopback)Capture audio: Are APO effects captured too?, the questioner points the Application loopback API Capture Sample which can exclude a process from capture.