'Wave Of Sorrow' is completed after 20 years

U2 are previewing a track from their upcoming reissue of classic album ‘The Joshua Tree’ on Facebook.

‘Wave Of Sorrow’ a track the band left unfinished 20 years ago but have put together for a new deluxe edition of their 1987 album, has debuted in a short film on the Facebook application iLike.

The seven-minute film depicts Bono sitting on a couch as he gives the song’s background, sings along to the playback, and offers thoughts on the lyrics, both new and old, between verses.

He even forgets the words during the song’s fade-out, stumbling over them as he sings along and eventually bursts into laughter. “I finished that the day before yesterday,” he admits with a chuckle.

The song’s rediscovery seems to have come as a pleasant surprise even to the band members.

“I got a message from Edge last night,” said Bono of the guitarist’s first listen to the tune, “and he said that I have a future in the music business.”

‘The Joshua Tree: Deluxe Edition’ is set for release on 20 November.

–By our Los Angeles staff.

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