[quote=crossg;2035084]Dan knows what he is talking about.
From my Onkyo manual:
[B]5.1-channel source + Dolby PLIIx Movie[/B]
These modes use the Dolby Pro Logic IIx Movie mode
to expand 5.1-channel sources for 7.1-channel playback.
[B]Neural THX 5.1/7.1[/B]
Neural-THX Surround employs psychoacoustic frequency
domain processing, which allows delivery of a
more detailed sound stage, with superior channel separation
and localization of audio elements. The Neural THX
5.1 and Neural THX 7.1 modes can expand any 2-channel
stereo source for 5.1- or 7.1-channel playback,
respectively. Use them with CD, radio, cassette, TV,
VHS, DVD, and other 2-channel stereo sources, including
video games. Neural-THX Surround can also be
used by broadcasters to encode and transmit surroundsound
content over a stereo signal, which listeners can
enjoy as either surround sound or normal stereo. XM
Satellite Radio, [B]for example, using Neural-THX Surround
on select channels, which the AV receiver/AV
amplifier can expand from 5.1 channels to 7.1 channels.[/B]
There are more listening mode that do matrix from 5.1 to 7.1.[/quote]
I stand corrected,I dug a little deeper into the Onkyo HT-R530 manual and found where it says,“Dolby Pro Logic IIx,If you’ve connected surround back speakers to the AV receiver,D Pro Logic IIx allows you to enjoy 7.1 channel playback from 2-ch or 5.1 channel music or movies.” and goes on,sorry for the bad info! I had read that myself,I also seen that in the book under listening modes where it states turning 2-ch into 7.1.