Audio sounds alright to me and the voices are pretty clear, so maybe it's just the version I'm listening to.
But, I'll see what I can do (spoilered for those who haven't watched the trailer yet):
Emet-Selch?: "And so, you venture forth unto the unknown...
Emet-Selch?: "A fate beyond the horizon that cannot be divined, a future undefined and in flux."
Tataru: "Have a safe journey! And please, please, be careful!"
Emet-Selch?: "That which lives, is destined to die. Love, leads to loss. Every begininng has an ending."
Emet-Selch?: "Treasure every moment, every step of your descent. And there, in the depths where souls and stars rest, find your 'truth'."
Alphinaud: "Maybe we don't belong here, but neither do they. Not out here in the wind and the cold."
'Lady of Light'(Venat/Hydaelyn?): "That bloom, will be your guide, test and proof of your conviction."
'Lady of Light'(Venat/Hydaelyn?): "In darkness, seek joy. Walk free, and bear the light for others to follow."
Unknown girl (one of the Magus Sisters?): "Come. Let me relieve you of your burden. You've suffered enough."
Alisaie: "The sky burns! The Final Days are truly upon us!"
Unknown man (Neva?): "Bereft of hope, and now dignity.... T'was a grand, glorious dream we shared."
Unknown man 2 (Alphinaud?): "I.. won't... lose them! Not a one!"
Alisaie?: "(Are we?).. truly so powerless, that our only choice is to flee?"
Zenos?: "We've come too far to back down now..."
Zenos: "Whereever is 'so suffering and despair..., you appear... to fufil your duty as defender of this Star."
Alphinaud: "There must be a way to restore things to the way they were!"
Fandaniel: "To reclaim the perfect paradise we once had!"
Unknown man (Fandaniel? Zenos?): "It will be ours again! A world free of sorrow!"
Emet-Selch: "Let the curtains fall upon this, the Final Chapter, in the tale of the Star!"
Alphinaud: "To have you at my side, it means more to me than you know. Thank you, from the bottom of my heart."
Alphinaud: "Given what lies ahead, I did not wish to leave for later, that which I could do today."
Alphinaud: "After all, tomorrow is never promised."
Hopefully I got it all, but there were a couple of parts I wasn't 100% sure of, so your malmage may vary.
EDIT: Bah, sniped! :P