Tracklist was revealed.
https://www.jp.square-enix.com/music...ers/tracklist/
Tracks 1-36 contain music from 4.4-4.5.
Just to tell you which music is already available:
Tracks 8 and 9, "A Dream in Flight", and "Ending", are from Masashi Hamauzu's Chocobo Dungeon work. These were used as the songs for the ending sequence of Alphascape.
Tracks 16-18 are from FFXI: COP, used in Baldesion arsenal, Eureka content.
Tracks 19-34 are from FF Tactics, used in the Orbonne Monastery raid and story sequences in this raid quest.
Others than these tracks I mentioned, the rest is all Soken and co's original work for 14.