I have found another rather technical document about AC3 downmix.
http://www.qualisaudio.com/documents/TechNote-4-5-6-2013.pdf
It isn't really an easy thing
Great! This must be an article for people who develop downmixing
algorithms!
When I watch a TV channel with AC3 audio and I switch the downmix on, the voice sound is getting louder on my AV receiver 5.1 setup. So this is really strange that in your case it is the opposite.
What happens if you let the Samsung TV to do the downmix? I am assuming the TV can decode the AC3.
Zitat von KnorpiWell, when I let the Samsung TV do the downmix, i. e. select the *.mkv file with the Samsung GUI and let it play, the sound is perfect!
Voices can be understood clearly, while effects still are loud, but not much too loud so that you have to quickly grab the remote and decrease the volume.
Not sure if I got you right about changing the volume with AV receiver.
Well the authors certainly would like us to listen to the movie at predefined loudness, but I think the loudness ratio between each audio channel is the thing which if kept will still produce the sound as intended.
Zitat von KnorpiI see, but I also believe that the authors made the volumes for the people who watch the movie in a cinema. At home the range of loudness should be somewhat compressed.
But when it comes to that you cannot hear the dialogues while the effects are much too loud, I believe that there must be something wrong with the downmix algorithm.
My TV shows how you can make a good downmix, while the dreambox fails to transport the dialogues or center channel correctly. But I don't know who is to blame...
Of course you are right that this is a job of the component which does the downmix.
But it will not be easy to prove it isn't done right.
Using a TV as the measurement tool is probably not the right path.
Zitat von KnorpiOk!
Comparing a movie audio which goes via two different paths without knowing how they were altered by the Samsung SW, doesn't help either.
Zitat von KnorpiSure! I also believe that there are complex dependencies. I only want a solution for my situation.
I am on the way to get an AC receiver and a surround system and I am sure that the problem will disappear then. But strictly spoken this isn't a "solution" to the downmix problem. It's just avoiding it...
So this was the second part
PiGeon