Capture Card audio always being recorded, even when muted

[ScarletBovine]

I'm having a problem with my capture card audio in OBS. The capture card is the EVGA XR1 Lite.

I noticed in a test recording that my audio was doubled up, upon playing with settings in OBS I determined that there is audio from the card always present which I have no control over. Even if I mute the card's audio output, it is still present in the recordings.

I have tried a number of things besides muting the card and desktop audio (though it doesn't appear to be coming through that) such as turning off the tracks on the card in Advanced Audio settings, turning off monitoring, applying a -30 dB filter to the card's audio (which had no effect), and even when turning off visibility of the card in the sources list, the audio will still come through in recordings.

I have no idea where this duplicate audio is coming from; there's nothing on any active VU meters in the mixer. It isn't coming through desktop audio or monitor. This is obviously a real problem since I have no control over this audio, volume or otherwise.

Any ideas? Thanks.

 

[ScarletBovine]

Turns out that this audio comes through on scenes that don't even have the capture card added as a source. That shouldn't be happening, right? It isn't coming through Desktop Audio or Monitor. I'm at a loss.

 

[koala]

Open the properties of your capture device in OBS and scroll to the bottom. Verify the audio settings on the bottom are correct and do what you want them to be. Default is the capture card audio is directly captured into the OBS mixer without monitoring, where it will appear as extra audio source in the mixer window. You can also output it to a custom Windows audio device, which might get unexpected side effects if you route more than this audio to that device.

To further troubleshoot:
Right-click the "Audio mixer" dock of OBS and choose "unhide all" to unhide all audio sources you might have hidden and forgot about it.
Then mute every single source in that dock by clicking the speaker icon of that source, and enable track 1 for every source in advanced audio properties.
Now with every source muted, your recordings are silent, because every source is muted. Check this.
Now unmute the first audio source and check again, if your capture card audio appears on a recording.
Then mute everything again and unmute the next audio source, and check again, if your capture card audio appears on the recording.
Do this for every audio source.
Now you know on which audio source your capture card audio comes through. If this is some unexpected source, check that source configuration.

 

[ScarletBovine]

Right-click the "Audio mixer" dock of OBS and choose "unhide all" to unhide all audio sources you might have hidden and forgot about it.

This ended up being it. Turns out I added my microphone as a new source instead of using the OBS pre-existing "Mic/Aux" and that source was picking up the card because it was the default input device in Windows. It was hidden and I didn't realize it would always be active even if not added to a scene as a source.

Thanks!