Theatrhythm Final Fantasy is Square Enix's 3DS rhythm game that takes the Final Fantasy brand in a slightly different direction. The game plays out like traditional Final Fantasy titles, but battles are now like a rhythm game, relying on time-based actions.
Since it's been released in Japan, last month, Square Enix have started to roll out new tracks from various games in the Final Fantasy series and they can be downloaded to your Nintendo 3DS. Four of the new tracks have been revealed, coming on March 8th 2012.
Matoya no Doukutsu (FF, field stage)
Battle 1 (FFIII, battle stage)
Archylte Steppe (FFXIII, field stage)
Warera Kitareri (Final Fantasy Type-0, battle stage)
You can listen to samples of the tracks through official Japanese website.