Trash isn't the word I'd use but PCars audio mixing is bad. Engine sounds are way to loud no matter the point of view and drown everything else out. It's at a point I have to drop the audio all the way down at times. GTS sound from videos is a LOT better then what was in GT6 and I would say better then what is in PCars right now. Forza 6 is better as well of course. I'd rather have the sound to low then blaring in my ears.
You do know that you can isolate the engine audio in pCARS and adjust it independently of other sounds for personal preference, right?