One of the best looking games, featuring one of the worst surround mixes in recent years.
Gameplay and story aside, Horizon is a weird technical feat that has me scratching my head quite a bit. The game looks absolutely fantastic, I'm on a PS4 Pro playing it on 1080p downsampled from 2160c. Game looks freaking clean!
The audio though... quality wise, it's there. I mean, just for fun I measured the stomps of the Tallnecks going down to 15hz! FIFTEEN
There's also the bgm where there's this very heavy ripple of bass that goes from ~30hz down to 20 very subtly, it's fantastic stuff! Bass heads, THIS
is the game you'd want to experience without a doubt.
Unfortunately the surround cues is a mixed bag. Sometimes, it sounds okay. But then often times it can sound wrong, which is very annoying when I'm trying to locate where enemies are. I mean, yes you can bring up the "Focus" to tag enemies. But part of why audio is so damn important in this game is because there's a stealth element to it. Stealth does not work if the surround cues does not work and this is part of why Horizon is a poorly mastered game, audio wise.
Then there's the dialog volume imbalance. If you have a 5.1 or more setup, simply pan your camera in 360-degree motion and you'll notice instantly that voices in the rear channels are often times louder than the one in the center. Then of course there's the dialog channel imbalance where it leaks to the left or right channel, causing an imaging "tear" during cutscenes.
No way to datamine the game since the files are encrypted. So can't tell for sure how their audio files were sampled and mixed sadly.
Guerilla seems to know the problem, but has made no mention of when or how they are going to fix it though. The only patch they're working on now is fixing the crashing bugs that are apparently quite frequent for some players.