brENsKi wrote:
all they're doing is exactly what every band in the music industry has done to their live recordings - since live albums were "the big thing" - ie the 1970s.
True, but live recordings these days are vastly more numerous in the form of recordings which find their way online (see how many pro shot videos there are of Mumford and Sons on YouTube, for instance - an enormous amount. The available video coverage of their two tours is probably at least twice as extensive as Queen's entire touring career). Since these have very little post-production work done to them except shot assembly, and aren't given ceremonious official releases, they're generally an untouched representation of what the live show sounded like.
So, in an age where this is the predominant format in which live shows become available, and live albums are comparatively very scarce, it's easy to account for the expectation that live releases are done in an authentic way.
There's also a key difference between overdubbing and its modern day equivalent - pitch shifting - in that overdubbing isn't sonically hideous.