Bad muzak I can handle. It's when they interrupt it every ten seconds to remind you that there's still the same number of people ahead of you that really gets my goat. And I need that goat!
On a phoneline service that I have to call about twice a month, you also get a frequent click and a second-long pause in the music, that makes you think you’ve connected to an operator. Given how the service is outright malicious to its users, it wouldn’t surprise me if that was hard coded into the system to keep callers on edge.