EDIT: Audio issue was resolved, it was a bug with a headset I had just refurbished and caused audio distortions with anything with low tones, I usually use studio/monitor headsets so this usually isn't an issue. Changed some settings for the audio mixing in my headset, namely unnecessary sub feed and all was well (I hate 5.1 and 7.1 headsets, usually use them in stereo mode, but this one still kept the sub feed).

Starting after the into with chapter 1 the audio quality was a little iffy, still listenable, but not quite as nice as the first release. Seems to continue through various chapters and can be a bit charring at times.