Guthrie mentioned in interviews working on The Wall in 5.1 as far back as 2011. It was brought up during The Wall Immersion release as well as the WYWH and Amused to Death SACD releases. The Wall was slated to be worked on next while Guthrie remarked that he would like to work on Animals. He also mentioned the problematic state of the original multitracks. Here we are 8 years later with Animals in 5.1 slated to be released this year and no word about The Wall in years. It's not such a huge leap to assume that The Wall project has been problematic, perhaps it still is, when Animals has been done and dusted in the interim. If there were other multitrack options available Mr. Guthrie would know better than anyone.
http://www.brain-damage.co.uk/album...review-and-interviews-including-james-gu.html
Is Pink Floyd's The Wall Immersion edition going to have a 5.1 Surround Mix?
James: My understanding is that EMI plan to stick to their release schedule for the 'Why Pink Floyd?' campaign, which means there wouldn't be time to include a 5.1 mix in 'The Wall' Immersion Box. I
will be doing a 5.1 mix of The Wall for release on SACD, but we don't have a planned release date for that yet.
The original multitrack tapes are in pretty bad shape, so the project will take some time. I'm currently working on a Blu-ray release of 'The Wall' Movie.
By "the original multitrack tapes being in pretty bad shape" - are you referring to the Ampex (or other brand) reel tapes manufactured post 1978 that can gum up tape machines and shed magnetic oxide?
James: Yes. Half-way (ish) through the 70s, and unbeknownst to all of us in the studio world, the tape manufacturers changed the formula of the glue that bonds the oxide to the backing of the tape. I'm told that the original glue contained whale oil, so they had to change to a synthetic oil and that synthetic oil unfortunately causes the glue to break down over time, producing a gummy substance that seeps through the oxide making the tapes unplayable. Fortunately, a bright spark bravely discovered that you could bake the tapes and then safely play them a few times. But, that's not the only challenge when it comes to restoration - Edits, or tape splices, and the breakdown of the glue in the splicing tape that holds those edits together, have caused huge problems. I made hundreds of edits on both the 2" and the ¼” tapes of 'The Wall', so you start to get an idea of how time-consuming the restoration can be.
Additionally, there was a manufacturing period of 2 or 3 years where the tapes were particularly unstable. Of course, they appeared fine at the time. Both 'The Wall' and 'The Final Cut' albums are recorded on the peak of that bad tape.
Are any other Floyd multitrack tapes, in your experience, suffering from this particular problem?
James: Everything after 1976 or 1977 is susceptible to the problem. Even the tape we are using now. And it's not just the multitrack tapes that are affected – the ¼” and ½” masters are in the same predicament.
Some more interviews where he mentioned working on The Wall in 5.1
http://soundbard.com/building-the-5...-surround-sound-plans-at-academic-conference/
During the Q&A portion, Guthrie confirmed he’d like to do more Pink Floyd 5.1 mixes, but that it often comes down to a matter of the time available on his and the band’s collective schedules, so “don’t hold your breath.” That said, he was willing to concede that
The Wall seems to be the most likely next candidate in the 5.1 queue, but the album he’d be most interested to do in surround is
Animals.
http://enjoythemusic.com/magazine/music/1015/James_Guthrie_Interview.htm
One thing Guthrie can confirm is his next surround assignment: "I'm going to be starting a 5.1 mix of
The Wall soon — the original studio album, that is," he reports. "And we have discussed
Animals." No timetable on when
The Wall in 5.1 will be completed for release as of yet, but rest assured, we'll be right on top of it.
http://www.superdeluxeedition.com/news/pink-floyd-the-wall-5-1-coming-to-sacd-says-james-guthrie/
Pink Floyd engineer James Guthrie has confirmed that he will be mixing
The Wallalbum in 5.1 Surround and that this mix will appear on SACD (Super Audio CD), although there is no release date planned as yet.