

The sounds for the Boombox, the Nighttime & Eclipse Ambiences, the adrenaline noise(s), and now several new themes I sorted together myself with the Facility Meltdown & the Pizza Tower Escape Music mods in mind.
OR
Boombox Song 1 ~ Down We Go by Karbonic
Boombox Song 2 ~ Sherbet Lobby by nicopatty
Boombox Song 3 ~ General Release/Before Every Load by Mike Klubnika
Boombox Song 4 ~ MARIO SING AND GAME RHYTHM 9 by TaeSkull
Nighttime Ambience ~ Blackout by nicopatty
Eclipse Ambience ~ Bloodmoon by nicopatty
NEW Adrenaline/Chase Ambience ~ Made by me!
If you can't seem to get it working upon initial install, Clementinise's CustomSounds Mod has a command you can input into the in-game Terminal on the ship, that should load the songs into your game if at first they don't show. This is also useful for if you have any friends you want to send this mod to, in that you both hear the same music. (Refer to https://thunderstore.io/c/lethal-company/p/Clementinise/CustomSounds/#:~:text=Terminal Commands%3A,all CustomSounds commands for additional info)
Just type: CUSTOMSOUNDS RELOAD into the Terminal, and it should load the music into your game. (Note; I realized this just now, but the mod won't replace the original songs. It'll instead add the new four, as well as keep the original four. One of eight of those will randomly be picked when you hit play. The Ambiences however, are completely replaced.)
Regarding the Meltdown Music, if you want it to work, you'll need to download the Pizza Tower Escape Music mod first, downloading this mod second, and then disabling the Pizza Tower Escape Music mod lastly. This mod was created as a hook to the Pizza Tower mod, so it's required to play both the Meltdown, and Late Day Escape Themes at all.
Emphasis on disabling the Pizza Tower Escape Music mod if you have this one installed and enabled alongside it; it WILL NOT WORK if they're both enabled at the same time. If you've started your game, without reading this and doing so first, I won't be held liable for if it ends up breaking something on your end. You've been warned.
Link to the Pizza Tower Escape Music mod: https://thunderstore.io/c/lethal-company/p/BGN/PizzaTowerEscapeMusic/
One final thing I figured I should also mention; I added some mp4 files for the ingame TV. This mod was meant for me and my friends, but if you'd like to see said videos, you'll need the TVLoader mod for it to work. If you don't want the videos to be there, simply locate them in: [\Users<username>\AppData\Roaming\Thunderstore Mod Manager\DataFolder\LethalCompany\profiles<profilename>\BepInEx\plugins\LaPHANTOMA-LECompany_Sounds\Television Videos] and then delete them. If you aren't using Thunderstore, then you should find the mod under: [BepInEx\plugins\LaPHANTOMA-LECompany_Sounds\Television Videos]