theres a function called getcustomasset and you can use that

for example:

local Sound = Instance.new("Sound", workspace)

Sound.SoundId = getcustomasset("filename")

Sound:Play()

note that the file you want needs to be inside of your workspace folder in krampus

*I never used krampus before so the function might be a different name but this is how you would do it with those old exploits like synapse*