Stereo upmix to 5.1 in MeGui

[Selur]

Wasn't sure if it would have been better to post this in the newbie section, so plz move it if it's better placed there. :)

MeGui offers three options to do a stereo to 5.1 upmix.

1. via SuperEQ
2. via Sox
3. with center channel dialog

As far as I understood, 1.&2. basicly do the same thing:
They use an equalizer (Super EX or Sox) with some preset configuration to do the upmix. So far so good. Comparing 1&2, 1 normally gives the better results but takes more time in analyzing and rearranging the audio.

Is this right so far?

---
As far as I unterstood, 3. tries to filter the dialogs out of the stereo signal and puts them in the center channel.

But how is this compared to option 1&2 quality wise?
Which option should one choose 1., 2. or 3. ?

:thanks:

Cu Selur

Ps.: Plz, don't post about the usefulness of such an upmix in general. thx. (I did try to find an answer through the search, but didn't find anything useful, but this might be because of my lack of understanding the whole audio thing. :) )

[check]

There are three options because there is no objective way to measure quality.
On the usefulness (or otherwise) of upmixing, why not just do it on playback? You will save a lot of space then.

[Selur]

Plz, don't post about the usefulness of such an upmix in general.
On the usefulness (or otherwise) of upmixing, why not just do it on playback? You will save a lot of space then.
Thanks,...

There are three options because there is no objective way to measure quality.
Fine, so you want to say that there's is now way to tell which of the options will probably deliver better output? That's sad, I was hoping for some feedback from people using these methods and that can at least give some general advice. :(

So does anyone know if I understood 3. right?

Cu Selur