In Brief

* * 1/2 Roy Orbison, “King of Hearts,” Virgin. As posthumous releases of uncompleted tracks by pop stars go, this is a good, well-assembled one, though there’s no question why most of these middle-of-the-road compositions didn’t make the final cut of “Mystery Girl.” The vocal tracks Orbison left behind are predictably perfect, but the songwriting tends toward the mediocre. Only “You’re the One” is a notable addition to the canon.