If you're in Game Menu while some noteblocks are playing like in a music form/other and close the menu you can hear the music glitch a bit...

Sadly, i cant show you the video from here because its 380.27MB
But if you want to see it, i have a link that will lead you to the video.
Don't worry, its dropbox so its safe.

https://www.dropbox.com/s/zkw662do9w665kt/javaw%202016-02-16%2010-11-20-569.avi?dl=0