That’s because it has to use some sort of impercise method to identify speech vs everything else, since speech is mixed in with the rest of the audio.
If speech had a dedicated channel it wouldn’t be mixed in with everything else and you wouldn’t need to use any tricks to adjust it independently.
EDIT: need more coffee, I misread the comment talking about a software solution as suggesting just putting speech in a dedicated channel. Whoops. This comment is useless.
My Denon home theater amp has a setting for this. It doesn’t work very well, but there’s a minor improvement when it’s set to medium.
That’s because it has to use some sort of impercise method to identify speech vs everything else, since speech is mixed in with the rest of the audio.
If speech had a dedicated channel it wouldn’t be mixed in with everything else and you wouldn’t need to use any tricks to adjust it independently.
EDIT: need more coffee, I misread the comment talking about a software solution as suggesting just putting speech in a dedicated channel. Whoops. This comment is useless.