I started working in studios (as a musician) in the late '60's so can't go back quite that far, but over the years can remember going into the booth to see the latest innovations. After the dawn of digital we were no longer allowed in the booth, along with the fact that engineers seemed to care less about the quality of individual pickups as they would 'fix it in the mix' which of course was a lie to shut us up.
One statement from the video that rang a bell was referring to that type (50's) of recording as more "honest". Imagine how the pops field would change without the likes of Melodyne or VocalCorrect (or whatever it's called); compressors, limiters, and EQ that were not so simple to apply.
Not saying we should go back to the 50's, but maybe try to be a little less reliant on all the toys, bells, and whistles as while they can produce a slick product they also warp everyone's, especially those in production and the final listeners', sense of what is 'real', and also distracting studio musicians from recording music by demanding (or creating) unrealistic levels of precision which cannot be reproduced live on stage.
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