We are told:
50th Anniversary Deluxe Edition of the Moody Blues’ Days Of Future Passed. This 2CD/DVD deluxe set includes the full original 1967 stereo mix, which is being released on CD here for the first time. Due to a damaged master tape of the original mix, the album had been remixed in stereo in 1972 and since then it is this later mix, which has been used on all CD reissues. Now that technology allows for the original master to be repaired, the album can be fully represented on CD1 of the set for the first time.
This new set also includes a 5.1 surround sound mix derived from the original 1972 Quad mix. Additionally the DVD comprises previously unreleased video footage of the band performing three key tracks from the album at MIDEM on 24th January 1968, eight weeks after its release. The 2CD/DVD set includes a poster designed by Ray Thomas.