This is the baseline. Widely available as FLAC rips from the CD box set. Engineer Sam Okell and producer Paul Hicks worked under the supervision of George Martin and the surviving Beatles.
Example audible differences:
In FLAC, Paul McCartney’s bass guitar is not just a thump—it’s a tactile, melodic presence. The slightly overdriven, fuzzy tone separates cleanly from John Lennon’s double-tracked vocals. You’ll hear the subtle ring of Ringo’s snare drum and the panning effects that earlier pressings buried. The Beatles Abbey Road Flac
Example verification workflow (concise): This is the baseline