a friend of mine and I are having a nifty discussion (mostly it’s me talking and him saying as much with almost no words)

about music theory, and we agreed (his words) that

“a MOVIE-MUSIC-y sound is

“a movie-music-y sound, chord roots a third apart, mixed qualities, common tones/pedal tones”

case in Point: V for Vendetta, by Dario Marinelli.

MY QUESTION IS:

when, did film soundtracks become like this, and how?

I mean, I don’t know many (any?) of the great old film soundtracks. Korngold? bernard herman, others…

classical music also “was not like this once.” (it was indeed becoming so (at least) by the time of Wagner.

when DID film soundtracks become so?