I think "Sober" may be one of the more artsy tracks on Melodrama so far. The song isn't very similar to Pure Heroine musically, but it is interesting and seems to be following the stripped back vocals, chorused background vocals, and simple beat formula that many of the other songs are following. I do like the sound of it even if I couldn't have predicted it after Pure Heroine, and I'd love to know what you think about it too!