My mother-in-law has a radio in her head. She enjoys audio hallucinations. Well, “enjoy” may not be the word. Sometimes, I think, she enjoys them. At other times she endures them. The real problem is she can’t turn them off. For the best part of a year now she’s been concerned that muzak is regularly playing in her apartment. She’s asked us to have a word with the management to get it turned off. Unfortunately we can’t hear it at all. It’s not playing for us.