be out of tune

1. To lack the proper musical pitch. People don't realize how easy it is to be out of tune when you can't hear yourself singing. Hey, man, I think your guitar's out of tune. OK, stop—you guys are out of tune, and the song doesn't sound right at all.

2. To be in disagreement with someone or something. I'm often out of tune with my family because they don't approve of my line of work. Unfortunately, the information we learned is out of tune with the doctor's claims. Of course she disagrees—the two of us are always out of tune these days.

be ˌin/ˌout of ˈtune (with somebody/something)

1 be on/not on the right musical note: They were both singing out of tune.
2 be in/not in agreement with somebody/something; be/not be happy or comfortable with somebody/something: He’s out of tune with modern ideas about education. ♢ I don’t like London — I just don’t feel in tune with city life.