I recently tried using my Headset’s inbuilt mic, which after plugging in started giving me audio feedback by default. I have it turned “OFF” in Windows’ Settings yet it still seems to give off audio feedback in my headset, but because Synapse 3 doesn’t recognize the Blackshark V2 X, (it’s on the 3.5mm jack, making it analog) I can't turn it off. 

Is there any other way to bypass Razer Synapse and turn the audio feedback off?