Bug Report OBS messing with my microphone?

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xD4rkFire

Member
I have a Samson C01U mic I use for streaming that runs off of the Windows Audio drivers. I have it set in my control panel to 45% volume but the moment I start up OBS, it changes the microphone's volume in Windows to 100%. This makes the microphone pick up a lot of background noise and you would think "oh, just turn the volume back down then". Well, the problem with that is that when I turn the volume back down to where it was before, the mic is extremely quiet.

i.e. At the same volume, the microphone pre-opening OBS picks up sound just fine but once the microphone volume is changed back to that same level after opening OBS, it's very quiet.

I think this may have to do with OBS changing something with the Windows Audio drivers. When I uninstall the Windows Audio drivers for the microphone and reinstall them, the mic works fine again.

Another thing is that IIRC, OBS does audio in stereo only but my microphone records in mono. I'm not sure if this is what is causing the problem though. If it is, couldn't OBS just take the mono mic signal and mix it into the two stereo channels?
 
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HomeWorld

Developer
Usually microphones have only one channel, OBS does the upmix to 2 channels internally. It may be the case where the mic output is using 2 channels but only one channel carries the audio signal (left or right, can't remember), if that is happening in your case, go to obs settings -> audio and enable Force Microphone/Auxiliary to Mono.

As for the volume thing, it's something outside of OBS scope, OBS does not change the volume for any audio devices, so yeah, it could be the mic drivers/software that's doing that.
 
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xD4rkFire

Member
It sounds like you may be onto something HomeWorld. I'm not on my streaming computer right now but I'll get back to you once I've tested it.

Another thing that I thought might be causing the issue is that I have the "Mic/Aux Boost (multiple)" set to 2, but I'm not sure if that would actually alter what volume my microphone is set to in Windows. Though even then, that wouldn't explain why the microphone gets set to 100% seeing how I started at 45% and if OBS did actually (it probably didn't) change the volume based on the mic boost, it should only be at 90% (45*2).
 
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