It looks like this slipped our radar entirely back in May 2011, when songwriter/producer Paul Brill collaborated with U2 on an acoustic version of “Walk On” for a documentary film called Burma Soldier.
The soundtrack came out on May 17, 2011, and the track sounds to me like it was (at the time) completely new — not a stripped down “acoustic” version of something that had been recorded before.
What’s cool is that you can listen to it for free:
And if you click that “download” link above, you’ll end up on Paul Brill’s page on Bandcamp … where there’s another “download” link that will let you grab the song at no charge.
Pretty cool. Enjoy!
(Thanks to U2valencia.com and others for tweeting about this today.)
Update, December 16
As Aaron S. explained in today’s OTR column, this is not a new version of “Walk On.” The audio is from U2’s concert in Tokyo back on November 29, 2006.