What is purpose of device OBS Virtual Audio in streamlabs virtual camera?

[alokmahor]

In file https://github.com/stream-labs/obs-virtual-cam/blob/08bb5df18a60b6e84bc81a01d51d4b3b9002b03d/src/virtual-source/dllmain.cpp

const AMOVIESETUP_FILTER AMSFilterA =
{
	&CLSID_OBS_VirtualA,  
	L"OBS Virtual Audio",     
	MERIT_DO_NOT_USE,      
	1,                     
	&AMSPinA             
};

What is purpose of this device?

[alectrocute]

It acts a loopback audio device to capture system audio (eg. Blackhole) but only if it's already installed on the user's machine.

[alokmahor]

It acts a loopback audio device to capture system audio (eg. Blackhole) but only if it's already installed on the user's machine.

Can we use this as virtaul mic? Like in zoom meeting I can select Streamlabs OBS Camera can I select OBS virtaul audio? So system audio can aslo be broadcasted like video is getting broadcasted using virtaul camera