Three of the songs in this pack are broken due to typo's in the script.
(Hi Louis, Scatman's world, Sing now!)

FIX FOR THE BROKEN SONGS:
open steamapps/common/workshop/108600/3013056633/mods/truemusic_addon/media/scripts
open the "TCGSoundsTCBoombox3013056633.txt" file.

Find the entries for each song where it designates the file to play. They look like this:
file = media/yourMusic/TCBoombox/___________.ogg,

change "Scatman's World" to "Scatmans World" (remove apostrophe)
change "Sing Now!" to "Sing Now" (remove exclamation mark)

finally open media/yourMusic/TCBoombox
change the name of the media file for "Hi, Louis" to "Hi Louis" (remove comma)

i only have a few other music mods and it only happens to scatman songs

i checked the media files in the steamapps workshop folder and they play fine in media player

idk why but some songs are working fine (ski-ba-bop, popstar, everything changes)
but some songs are just silent when you click play (hi louis, scatmans world)

scatmans world wont start annd its the best song on the album :/ :/