Entity disk music is allowed for any GM rank.
Disk music is a prop that gets spawned. It is under Entities>Star Wars Music Pack. You spawn the prop, put it where people cannot click on it, then press E on it to activate it/deactivate it.
URL Music is restricted to only Mega or Storyline Events (For any other event type, SGM+ must give permission)
To play URL music, find the song you want to play, using the link below, then right click it and select ‘copy audio address’.
Now, through the !menu find Apple's Creation followed by playurlsound command and paste the link and then click ulx playsound once.