Problem exporting audio files.

Hi guys,

Whenever I try to export my FL projects to audio, what I get as a result is a muffled and bass heavy sound, completely different to what I listen when I playback my projects within FL.
This issue also happens when I capture audio directly from my system via a capture/streaming software (OBS).
However, for some reason, I can record audio with my USB mic without any damage to the sound.

Technically, I do not think that this has anything to do with FL but I have no idea whether this has a software or hardware origin.
Please note that I always had these issues on this PC.

Do any of you encounter similar problems or know how to solve this?

Musicly,

Ouams