Despite the way they appear, the lettering on the slipcase and digipaks and the backs of the digipaks are not mottled, but a solid texture. Another one of those annoying scanning glitches... >:-(
Here's another scanning glitch: the 'Abbado Edition' lettering down the right-hand side of the front, and Abbado signature, are supposed to be in reflective gold print.
Just to avoid any potential misunderstanding: this is not the Carl Orff Carmina Burana (although it does have some of the texts in common); the music here is based on mediaeval musical manuscripts.