The Sound of Music achievement will not complete. I have played a music disc in a jukebox in multiple different Meadow biomes in seed -961584262. The music disc tried was c418 - Wait.

The most recent attempt was around coords 750, 120, 2100. I have played the song in multiple locations in each of the Meadow biomes. I've tried letting the entire song play out, popping the disc out early and playing it again, etc. 

I've seen a number of people reporting this same thing.