Well, this is kinda just immersion and ambience, but!
How cool wouldnt it be, if some civilian elves walked around with harps and flutes, playing a few notes instead of doing a voiced line? And hobbits playing some stringed instruments at their inns? And the bells! The bells of dale! Ah, the bells!
On the other side, horns and drums. Something akin to noteblocks, but louder, and reaching further. We could really hammer in our approach as we come to raid. Or send alarms along the road that enemies are approaching. Perhaps the "instrument" is just an amplifier, for noteblocks setting a tone/melody..
One can dream right?