Thanks to PT user dyland23 who writes:
"A while back a buddy of mine was working up at the barn assisting a video crew who was interviewing Trey about "Time Turns Elastic" for a DVD that i guess fell through.
My friend managed to rip the audio of Trey playing the song on acoustic guitar and sent it to me to check out before the big debut in Nashville.
Apparently during the interview at The Barn, Trey talked about doing this song with Phish so given the big announcement yesterday I figured it would be a good time to let it out. Enjoy!"