Wasn't this the game that some police officers in the US engaged in? Nothing illegal about them blasting Lady Gaga or whatever is popular while they work. But if you record the audio, you're unlikely to be able to share it anywhere without explicit permission from the rightsholders.

If you have anticipate having to bluster like this... wouldn't you be better off figuring out how to live without working that job in the first place?

“That’s a violation of the non-disparagment agreement that you signed. No severance for you.”