Pepper's Lonely Hearts Club Band: 50th Anniversary Edition is an expanded reissue of the 1967 album Sgt.

He said that he began working on the mix in December 2016 with engineer Sam Okell, who had similarly been involved in other Beatles legacy-related projects.

[1] Created using modern and vintage technology, the 2017 mix retains more of the idiosyncrasies that were unique to the original mono version of Sgt.

The first of these offers alternate takes of the album's songs and of the non-album single tracks "Strawberry Fields Forever" and "Penny Lane".

[4] The Beatles' company Apple Corps and Universal Music hosted a preview of the new stereo mix on 10 April 2017.

[7] Coinciding with the 50th anniversary, Geoff Edgers of The Washington Post interviewed Richard Goldstein, who, in his initial review of Sgt.

"[12] Rolling Stone's Mikal Gilmore described the effect as a "long overdue epiphany", since "Popular music's most elaborate and intricate creation – and one that helped end the mono era – wasn't made to be heard in stereo.

And in general, where there was whimsy (the bête noire of most Pepper agnostics) the power of solid drums and central voices irons it out.

"[15] In his review for Uncut, Michael Bonner said that "The Beatles never worked with such unified purpose again, but what this Pepper boxset captures is the fun, intense, playful ferment; the triumph, in other words.

"[20] David Quantick, reviewing for Classic Rock, wrote: "Purists may balk at some of the perceived liberties Giles Martin has taken (splitting and panning drum parts or backing vocals for starters), but he's by no means claiming this is the definitive version of the album, and has clearly acted in the interests of the material.