When playing the music disks 5, Otherside or Relic, the Jukebox will play those disks at a volume not consistent with what you may have your Jukebox/Noteblock Volume setting at and instead only play at whatever the Sounds volume setting is set to. To test this I set my Jukebox/Noteblock volume to 0 and my Sounds Volume to 30. All Disks other then 5, Otherside and Relic played with not sound after letting them run for 30 seconds.