MusicTheory Master Class:
Regarding the use of the German 6th chord; It is easy to pick out of a crowd. It does stick out so that one can hear exactly what it is doing in relation to the progression ii V I. But when we see it, as the cloner of a dominant 7th chord, we often are too busy rendering an interpretation of Mozart or of Beethoven and have no time to contemplate and put on thoughts upon the omnibus.
"since the Pythagoreans found the mathematical laws of acoustic harmony, music has been considered as a branch of knowledge as well as an art."