Cause if that's the case, then why not just replace the bass completely, or the guitar, or even her vocal? I mean where does this end? Seems like that's a slippery slope. And whose fault is it if the engineer/producer cannot get good enough sounds such that they would NEED to make replacements in the first place? What, they going to blame it on the drummer for not having his kit tuned up enough? Then why didn't they take care of that before they started recording?
You're right, it is a slippery slope. The digital world allows us as mixers to tamper infinitely with the source, which can really open
a Pandora's box of tastelessness...
Please correct me if I'm wrong, but your questions seem to imply that relatively recent innovations like drum replacement/augmentation and vocal tuning somehow inherently "contaminate" a mix if they are used...
In studying the history of audio, it seems that this is the objection that has faced just about every innovation that has come along. Right from close-micing techniques, through using equalisation to multi-track recording - all have, at one time or another been accused of interfering with the "authenticity" and "integrity" of music. Why, I read recently where George Massenburg faced much resistance when he first introduced parametric equalisation - from established engineers who felt that the very use of such was somehow a concession to not getting the sound right "at the source"....
Now, we might laugh those viewpoints now, but is this resistance to modern digital tools not just a case of history repeating itself just a little bit?
To illustrate why it's difficult to support the "authenticity" argument, let's take (for example) the "modern" drum recording method of close mics + overhead (established for a good 40+ years now). Honestly, when you stand in the room with a drummer playing acoustically, does it sound anything like the sounds we have heard on record for the past 40 years? Why not? Because the engineer has gated, equalised and compressed those close mics and overheads within an inch of their lives to get that sound... Yet, we somehow have come to accept that sound as "authentic". In fact, the sound stopped being truly authentic the moment it entered the microphones... But the reason we do it is because it
sounds great - Does the drummer care that it doesn't sound exactly like his kit in the room?
Hell no! He loves it because it
pounds, it sounds exciting, and it sounds explosive.
Is it any more "authentic" at a live concert? Nope -mics>mixing desk>processing>amplification>speakers.
The fact is, an artist usually wants to be presented in the most flattering light possible - and it is the mix engineer's job to use the tools he/she has on hand to accomplish that goal. They want a finished product they can listen to over and over thousands of times without cringing...
That said, I'm not denying that modern digital mix tools afford the potential to produce the most horrible, tasteless and artificial monstrosities, but let's face it - that has always been the case. An engineer dismissing the use of an audio tool on the basis that it has been used incorrectly in the past is somewhat akin to a chef dismissing the use of a knives because they have often been used to murder people.
In the end, it all comes down to
taste - Technical skills are something that can be taught to almost anyone. Beyond that, mixing is a complex series of highly subjective artistic decisions, and in this regard, it seems Fab has given us all just enough rope to either tie up and present the package beautifully - or to hang ourselves!