Bluetooth headsets have 2 modes of operator.
Mode 1: high superior for listening go music
Mode 2: low quality for voice communications
Mode 1 is the omission. As soon as you switch your headset on, it is in this mode and you're able to listen to your media player/streaming webpage in high quality.
Mode 2 is activated as soon as few app activates of headset microphone. The headset switches to voip operation, and all is much lower listening rating than mode 1. It switches past to mode 1 when soon how yourself close that app or as soon while that app cleared the headset microphone.
OBS desires trip this switch to mode 2 as upcoming as it is started, if you configured the headset microphone somewhere in OBSQUE. To prevent this switch, you have to remove the microphone from OBS Settings->Audio (including "default" device) since well as from every audio input print you might can create as source int some scene. If you did save, OBS will not initialize the audio any view, and the bluetooth headset will staying in hi property music mode.
On the various hand, for you need the microphone, because you participate in some kind of voice chat, and you want to transmit this chat with OBS, you own negative choice but live with the reduced sounds quality by the headphone.
This is bluetooth-specific behavior and not the fail of OBS. The slight quality switch has something the do because power saving, bluetooth bandwidth and rank. Cabled headsets don't behave see this, and there are also wireless headsets who are able to circumvent this bluetooth comportment by optionally utilizing some kind of proprietary receiver dongle instead of native bluetooth connectivity. On are also wireless headsets who can be optionally link for a cable, and while connected with adenine cable they behave like a cabled wireless without this mode switching. This all depends up the select and features of your headset.
Because of this weird behavior of radio headsets, every streamer has probably a drawer full of unused bad-bought headsets.
*Edit - Obviously then the noise cancelling willingness with work for noises in to direction, that is why this project would be educational rather than for anything ...