This package has been marked as deprecated, and it's suggested another
alternative is used.

Undertale Sound Pack
[Indev] Replacing nearly every sound effect with those from Undertale/Deltarune
By Panton
This mod requires the following mods to function

BepInEx-BepInExPack
BepInEx pack for Mono Unity games. Preconfigured and ready to use.
Preferred version: 5.4.2100
no00ob-LCSoundTool
Let's you easily load audio files, replace in game audio, send audio over the network and log any audio playback into console.
Preferred version: 1.3.2
Clementinise-CustomSounds
Let's you easily load audio files (With LCSoundTool) and replace any in game audio clip.
Preferred version: 2.1.2README
[INDEV, WHICH MEANS BEING TESTED STILL! NOT EVERYTHING HAS CHANGED, AND I MAY NEED TO TWEAK WITH THE AUDIO!]
Anyway, the title's self explanatory.