Originally Posted by The_K_Man
(Another soul brainwashed into believing peak is everything..)
To my mind, that's not at all what they are suggesting.
There's just too many factors involved. For example the speed / density of the arrangement, plus the amount of and consistency of the bass in the mix can have a big impact on RMS readings.
Also, unweighted RMS is a mathematical average of amplitudes regardless of frequency - and this is not how our hearing works. The human perceives some frequencies as significantly louder sounding than others, even if they are played back at the same sound pressure level.
These are just a few of the reasons why RMS level does not necessarily correlate to how loud a listener might perceive it to be.
I wouldn't suggest an RMS value meaningless - but I think Huntley is correct in suggesting that it cannot be relied upon as am accurate measure of perceived