I'm new in OBS so i may not have found the right option, but checked multiple combinations of audio setting and it still sounds like in this video: https://www.youtube.com/watch?v=Xun6H_COFtU&feature=youtu.be . It's in AAC format, 48khz, 128/192 bitrate, I don't remember which one was used in this vid exactly but it sounds the same when using both.