One thing I consider of note is what Ringo had to say when he heard George Martin’s mix of The Beatles first album: "Where’s me kick?" George Martin was not a Rock ’n’ Roll producer, and I think the groups early albums (pre-Rubber Soul) suffered for it. The vocals are imo mixed far too high, the drumset emasculated. The bass frequencies on early Beatles albums are noticeably rolled off, presumably to prevent mistracking of the styluses on most teenagers hi-fi’s. I don't consider the sound of Beatles LP’s to be sacrosanct, but I'm also not interested in the Giles Martin redo's. Abbey Road was released over fifty years ago, and I didn't much care for it then. I don't care if I never hear it again.
I remember being startled by the change in sound from the Rubber Soul album to the "Paperback Writer"/"Rain" single, and loving it. That change was even more pronounced in the Revolver album. Rock ’n’ Roll was getting tougher (The Yardbirds leading the way), and The Beatles were starting to sound kinda tame. Lots of the British Invasion groups didn’t keep up, and got left behind.
I have read that Rubber Soul was the last album recorded using valve (tube) electronics, Revolver being made on solid state. And of course Geoff Emerick was the new recording engineer for that album as well. The drumset sound on Revolver is drastically different from that on Rubber Soul; much brasher, and far louder in the mix. The guitar sounds are much different too, the Gretsch and Rickenbackers replaced with Epiphone Casino’s, the Vox amps with Fenders.
