In terms of SFX, it mostly changes sounds not directly tied to realism; ergo parrying sound, critical hits, potion drinking, etc.; so it DOES
NOT changes diegetic stuff like walking, jumping, eating, building.
When it comes to music, the additions were made based on music's overall
feeling/mood conveyed, not the actual context in which those songs were
used back in FF7 (nobody wants to relive some tragedies, but we can't
leave some wonderful tracks behind either). 

To use this mod, it requires you to download Custom Audio by aedenthorn.


Installation
Download Custom Audio first to properly start this wonderful journey (it requires you to start the game once after installing it).
If you opt for manual download, just paste the \Music and \SFX folders into the \CustomAudio folder that is inside the \Plugins, that in turn is inside the \BepInEx folder. In short: \Valheim\BepInEx\plugins\CustomAudio

If you opt for Vortex, apparently it works just dandy!

Customization
You can safely delete any tracks/sfx that you deem unfit for the game. Just go to \Valheim\BepInEx\plugins\CustomAudio and delete the tracks/folders of your liking!

Compatibility
This mod replaces many of SFX and musics. It might conflict with other mods that does the same thing. I'll try to keep a somewhat updated list of mods that works fine with mine:
Alternative Bow Sounds [OK]
Beavis and Buttgoblin Sound Mod [CONFLICTS]
Haldor Voice [OK]
Valheim SFX - Beavis and Goblin [OK]
Valheim SFX Overhaul [CONFLICTS]
Wolf Silencer Addon for Realistic Animal Sounds [OK]

Intended Implementations pending:
• Change bosses dying SFX

Hope you SOLDIERs enjoy this little trip to the past!