One of the brainiest guys in jazz, Brad Mehldau is likened to classical composers as often as he is boppin’ piano men; he is famous for his heady liner notes, and nearly everything he does comes with a conceptual thrust. So if Brad Mehldau is going to make a box set, it’s not going to be a straight-ahead greatest-hits or rarities roundup, something made perfectly plain by 10 Years Solo Live—an expansive four discs of on-stage keyboard meditations in which…
