Custom Music Help Request

So this isn't per say a question about FFXIV itself, more what I can do outside of the game to immerse myself in the Final Fantasy world more.

I love the game's music, but I also love the franchises music, especially well done remixes. What I want to do is have 3 separate playlists that I can command to play without having to do it manually. Essentially, I have a battle playlist (filled with various FF battle tracks), a boss battle playlist (same as above, only bosses) and a field music playlist (various FF overworld and field area themes). What I want to do is have a way to bring them up when it is appropriate to do so without having to tab out to a music player or interrupting the games focus window.

Anyone with any know how on how to accomplish this would receive much love and cookies! :D

The only way I know how to do this would be against the ToS of FFXIV.

I don't want to get it twisted, I'm not looking to replace any music in game. I want to mute the BGM in FFXIV, and use a media player program that can play the playlist, preferably at the press of a hotkey, for example, battle music plays when I press the key for sheathe/unsheathe weapon, and will switch back to field music music when I sheathe my weapon with another key press. with maybe my macro key for approaching a boss starting the boss playlist