I recall one of the TOTO guys indicating that the keyboard bends in the solo section, where entire chords bend, couldn't be done live at the time, so they set different pitch bends and did each note of the chords separately.
 
Bob Bone
 

That was inspiring, depressing and fascinating all at once.  

Toto is FULL of talent.  That is where the music starts.  If you have the talent, this translates into good groove which can be recorded and mixed easier. 
Steve Lukather did a live concert with Larry Carlton and the playing on that is incredible.
Jeff Porcaro remains one of my favorite drummers (May he rest in peace).  His talent level is WAY above mine and I am awe struck at how easy he makes it seem.  Google and watch him break down how he came up with and played Rosanna on You Tube.

patm300e
Jeff Porcaro remains one of my favorite drummers (May he rest in peace).  His talent level is WAY above mine and I am awe struck at how easy he makes it seem.  Google and watch him break down how he came up with and played Rosanna on You Tube.

That video is quite interesting (I just looked that up). He makes something fairly intricate seem effortless. (The first 8 seconds of that video are dark.)

If those Rossanna stems didn't totally ruin your day, these might:
 
Vocals only from Abbey Road:
http://tomcaswell.net/2015/06/15/the-beatles-isolated-vocal-tracks-abbey-road-medley/
 
Isolated strings and synth tracks for Here Comes the Sun:
http://tomcaswell.net/2016/02/18/the-beatles-isolated-strings-synth-tracks-here-comes-the-sun/
 
Isolated vocals and some guitar that wasn't used in Here Comes the Sun:
http://www.openculture.com/2012/01/here_comes_the_sun_the_lost_guitar_solo_by_george_harrison.html
 
One more interesting bit...this one's Randy Bachman explaining how to play the opening chord in "A Hard Day's Night", which has been a mystery to many a guitarist.
http://www.openculture.com/2011/12/guitarist_randy_bachman_demystifies_the_opening_chord_of_a_hard_days_night.html
 
 

bitflipper
 
 
Vocals only from Abbey Road:
http://tomcaswell.net/2015/06/15/the-beatles-isolated-vocal-tracks-abbey-road-medley/
 
 

not bad!
LOL
 
but does not touch this:
https://www.youtube.com/watch?v=v_wLNqUz7pM
 

It's all good.
 
Jesse Q. Screed
 
"nature does not hurry, yet all is accomplished."