McGrath,

Actually, as I remember the story (and it may be a different version than the one you learned), Orpheus journeyed to Hades and begged for Euridice's release, and sang to Hades himself, to soften the god's heart. He wasn't singing directly to his wife.

In anycase, the narrator of this song could be overhearing one lover sing to (or about) another, and compare that to the singing of Orpheus -- putting himself in the "shoes" of the other shades in the realm of the Dead, who also overheard Orpheus's singing...

Jeri? Are you there? It's your song. What do you think? Is this discussion helpful, or just distracting?