Long story short:
The audio is fine inside all the Google services. By that I mean that audio coming from Google Assistant, Youtube and Google Play Music is PERFECTLY FINE.
But once you try to use any third-party music player, and turn the EQ on, the software cannot take it and starts stuttering, as if the audio was blinking; it's cracky. This stutter often happens about 2 - 5 times in a whole song, but it may vary, as the problem are not the archives, but laggy software integration.
This problem can be replicated through any earphones, headphones, additional speakers and the in-built speaker.
Any app that's not Google Play Music suffers from this stuttering, from VLC to Jet Audio Plus, and EVERYTHING in between, I've tried them all I swear. I can't hear music like this, it completely ruins the experience, and no, I'd like to not use Google Play Music.
Is anybody else having this particular problem?