Monster Music Theme Replacement Mod [Made it, see OP]

[Abion47]

You need to make an add-on mod. This will replace anything that is in the files with the main game as long as it has the same directory path(s).

Then you need to make a custom_depth folder inside a scripts folder. This is where you edit the monster's music for their ambiance, search and hunt themes.

Then you need to make an NPC file inside a music file. Copy whatever you need into the NPC file. You only need to put in the files that you want to put into the mod, SOMA fills in the blanks of absent asset's with the main game's assets.

Open up the agent_flesher.hps file in 'custom_depth' and go to the very top. It should have a directory for the music and its volume. Edit this to your will.

After that, make sure you have the folders put into the resources.cfg file and that should hopefully help you in making the damn thing.

Really you could just do step 1 and call it good. Make an add-on mod that replaces the default music files with the desired ones.