It doesn’t matter if Idlewild is the best OutKast album, or even a good OutKast album, because it exists primarily to prove the point that Big Boi and Andre 3000 still make records together. A shame for a group that not six years ago was in its creative prime; they have since decayed to where just showing up is cause for celebration. After months of delays, there’s certainly reason to rejoice about the arrival of the group’s sixth album, Idlewild, a pseudo-soundtrack to the 1930s-themed Bryan Barber–directed vehicle of the same name. As with 2003’s Grammy-winning double disc Speakerboxxx/The Love Below, ...