Translation:The orchestra was singing in a sweet harmony!
C'mon Duolingo, some simple stuff here. Singing and playing are NOT interchangeable in English. The picklist English translation is WRONG. If you let me at some of these I'd correct them for you!
In response to PhilRushton: It's true language often includes a fair degree of redundancy allowing us to "understand" (guess) mis-translations. That doesn't make it correct. It is even more of a problem if people are using the courses "back to front" which I think some do ie as well as or after learning English from Romanian, they use the site as if English and learning Romanian (which I don't do but think is a good idea).
BTW having been alerted to your post, once logged on I can't see it - anyone else have that type of problem?