The ability to change Mount Music instead of just switching it of

[Lexia]

You want a orchestrion for your mount?

[Glasya]

You want a orchestrion for your mount?

Sounds good.
My chocobo could do with a CD player.
If it doubles as a DVD player even better; flying through Churning Mists I could sometimes do with an inflight movie.

[Melichoir]

You want a orchestrion for your mount?

You know, I thought of that last night. Yeah, that would be a good option. Not sure if youd treat it like an item youd put in your inventory, that activates when mounted, OR if youd equip it to your chocobo but it affects all mounts. Of course, itd be a simplified orchestrion. You can choose any orchestrion music you own, but only one song is played (on loop).