It's never a good sign when an album of covers winds up making you yearn to hear the originals. The theme here is that Canadian-born lang sings songs by other natives -- Neil Young's ''After the Gold Rush'' and Joni Mitchell's ''Case of You,'' for example. Her technique is, as always, impeccable; what's missing are distinctive arrangements or emotional interpretations of the material that would stake lang's own claim to these songs.

