In celebration of the 20th anniversary of prog-rockers Pink Floyd's classic 1979 concept album The Wall, EMI Records will release a new live version of the work, recorded in 1980 and '81.

Is There Anybody Out There? The Wall Live (Dec. 1) will contain "extra tracks not previously available on CD," according to an EMI press release. But EMI representatives said Friday (Oct. 15) they don't yet know what those tracks will be. The 1982 movie version of The Wall included several songs that were not on the original album.

An all-star live performance of The Wall, staged by Floyd bassist/lyricist Roger Waters in 1990, was captured on the album The Wall — Live in Berlin (1990). That album featured performances by Van Morrison, Bryan Adams, Sinead O'Connor and the Scorpions.

Many details of the new release, which will be a double-CD, are still sketchy, a label spokesperson said.

Longtime Pink Floyd cover designer Storm Thorgerson, known for his psychedelic style, will design new art for the album, according to EMI.

Tracks for the new live album will be compiled from Pink Floyd's '80 and '81 Wall shows in London, which were recorded on a 48-track mobile studio.

During those shows, a giant wall was constructed in front of the band as it performed. The wall came down during the finale. The shows also used puppets and animated films to help illustrate the album's story line.

The Wall, which spawned the hit single "Another Brick in the Wall Part 2" (RealAudio excerpt) and spent 15 weeks at #1 on the Billboard albums chart in 1980, was largely the work of Waters, who left the band in 1984. The album — and the subsequent movie, which starred former Boomtown Rats frontman Bob Geldof — told the tale of an alienated rock star known as "Pink."

A remastered version of the movie "The Wall," with previously unseen footage, will be released Nov. 9 on VHS and DVD.

Several Pink Floyd fans said they were excited to hear about the release, which will be the band's first since Pulse (1995), also a live album.

"The Wall show was one of the most amazing ever staged, and the live version was, in many ways, better than the studio version," English fan Phil Beckett, 46, wrote in an e-mail.