I have a friend in my FC that was able to change the music from the default FC House theme to use one from Stormblood and I was wondering how I am able to do it.

I've noticed there's a housing item that looks like the item used to make in the GSM Stormblood Quests. The Chronometer. So I don't know if that can be used to change the music or whatnot or I'm missing something.
Though considering in the description it mentions TIME and not MUSIC I don't think that's the case which leaves me pondering what to do. I looked it up on a search engine and got no results on what I was looking for.

I like to change from the default music to something else. Can someone point me in the right direction on how to do this.