Good morning @Thijser ! :) It makes not much sense to fill up your question with more or less not useful comments, all I can say is that there's a pretty good chance to solve your problem ... maybe you find something here ->
freedesktop.org/wiki/Software/PulseAudio Also check whether you can change audio settings in BIOS. As a little motivation from my side, I can tell you that I once got a weird printer problem solved simply by choosing a driver for a completely different model. :)