I'm new to forums and OBS as well, and just got my Mirabox and was trying it out. Im not very knowledgeable about this program nor others but I can give the last log that I made.
The audio distortion seems to only happen in at least my switch since I haven't tried any other consoles. It seems all the games I've tried have this Echo distortion like another audio device is changing how it's being coded.
Pokemon Legends Arceus log. https://obsproject.com/logs/H6zOm9BLsU0fOpMV
Tears of the Kingdom log. https://obsproject.com/logs/aB0n9b8mCcXWOmBS
The audio distortion seems to only happen in at least my switch since I haven't tried any other consoles. It seems all the games I've tried have this Echo distortion like another audio device is changing how it's being coded.
Pokemon Legends Arceus log. https://obsproject.com/logs/H6zOm9BLsU0fOpMV
Tears of the Kingdom log. https://obsproject.com/logs/aB0n9b8mCcXWOmBS