Only in moments of greatest climactic import does the reader of LotR "hear" osanwë. The best example is on top of Amon Hen: "Fool! Take the Ring off!" Instead, as
mark has suggested, it is most often described from the outside from the point of view of a Hobbit. Well, we have no Hobbits at our disposal in this tale, and only one Man, whose mind is an apparent battleground for osanwë. So maybe we need one of the humans present at this scene, to offer the thing from her(his) perspective?
Here's the heart of the niggle: it's
easy to write words in dialogue form to represent osanwë ... too easy. I feel like we lose something in the gain of ease. Mystery, wonder. If we describe osanwë at one remove, I bet we come up with a more evocative tale.
Or maybe we just remind ourselves that this is an RP and not bog ourselves down with all that....
