Since it's battle version, Spiral, is available in the Gold Saucer, I see no reason why Primal Timbre isn't an orchestrion yet! It's such an excellent song, it deserves more love than that!

I'm not really sure if it's a pain to add the rolls into the game or not, but I believe it'd be worth it! Just add it to the list of rewards above Spiral. The piano work is just to die for!