As old as lyres and lutes alike, horns, whether carved from wood, animal horn, or hammered from brass or bronze, have been a staple of musical culture throughout all of known history. I like a wide variety of instruments, stretching across history, and there's some honestly fascinating examples of ancient instruments.
So it seems odd to me that there aren't more instruments, spread throughout crafting, to represent this. I have found a flute as an in-game drop, an item that caused sleep once per day, but other than that, there seems to be almost no representation for anything except stringed instruments within the crafting lists of Arelith.
Perhaps some bone/horn crafting could be turned into additional carpentry crafting recipes for crafting non-stringed instruments, and some smithing or art crafting recipes as well, for making brass or hybrid instruments such as trumpets and the like?
I think this overall would increase the diversity of play throughout Arelith, and also provide more options for bards to play things beyond just a mandolin or lute.