Is it possible to split the sound if you have two audio devices, but without third-party software?

[orangedeal]

The MPC-HC player and foobar2000 play audio that should not be captured by OBS so that it does not appear on the recording/broadcast. There is also some game and Discrod, the audio from which should be captured by OBS. I was advised to route the sound through hardware, but I didn't listen because I thought I could do without it. I remember that they told me about the following scheme - from the linear output of the second sound card (for example, built-in Realtek), the cable will be connected to the linear input of my main (X-Fi) sound card in the PCI-e slot. What next? In the players, I should choose Realtek, and everything else will work via X-Fi and I will also listen to everything via X-Fi, including those players, the sound from which will go to the X-Fi linear input. But how can I make sure that the line-in input is not captured by OBS if everything that comes through X-Fi is captured? I plan to use Audio Output Capture or just Desktop Audio.

I'm one of those users who couldn't get Application Audio Capture to work properly, so I'll have to do without it. I also couldn't make friends with VoiceMeeter on a new system or this one because of Windows 22H2 (a description of problems and solutions that didn't help me would take up a lot of time and space).

 

[AaronD]

The wall of text is kinda hard to read. Can you draw a diagram?

In the meantime, you might get a cheap USB sound card, just plug it in, and wire it to nowhere. Send everything to there that you want OBS to pick up, and nothing else. Then Desktop Capture or Output Capture that device, Monitor it in OBS, and send the Monitor to your original sound card. Everything that you don't want OBS to pick up, also goes to your original sound card. Use the app and Windows' settings to send things to the two sound cards, not OBS.

That diagram also works with virtual sound cards, a specific type of which is called a loopback. This seems to be a popular loopback:

VB-Audio Virtual Apps

VB-Audio Virtual Cable and App's

vb-audio.com

A loopback is a virtual speaker and virtual mic as a connected pair. They behave just like a physical speaker and mic as far as any software is concerned, and appear in the same list. Whatever you send to that virtual speaker, appears in that virtual mic. So you set up OBS to receive that "mic", and send the apps that you want it to capture, to that "speaker".

Or to do things all in one place, you can use one of these:

VB-Audio VoiceMeeter Banana

VoiceMeeter Banana, the Advanced Virtual Audio Mixer by V.Burel

vb-audio.com

VB-Audio VoiceMeeter Potato

VoiceMeeter Potato, the Ultimate Virtual Audio Mixer for Windows

vb-audio.com

Two different sizes of the same thing. Each of them comes with a set of virtual speakers and mics, in addition to using physical devices as well. But these virtual devices have a mixing console in between.

Again, use the apps' and Windows settings to send each app's audio to a different place, and once you have that separation, *then* you can do something different with each one.