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74.251.7.13
In Reply to: RE: Marantz SR4002 7.1 AV Receiver w/ HDMI 1.3 posted by townsend on January 28, 2008 at 19:32:27
Can it add 2 channels of audio to 5.1 PCM soundtracks (usually via Pro-Logic IIx overlay)? If not, some movies will only play in 5.1, while others will play in 7.1 -- and who wants 5.1 after you've experienced 7.1?
Follow Ups:
And what is lost if I only have a 5.1 setup playing a 7.1 movie ? Seems I lose two (2) channels of audio info or does the player "fold" the two extra channels into the rears ???
The player should fold the rear surround info into the side channels so no information should be lost.
The sound should be more envoloping with better localising of information behind you when that is required.
It's a nice plus but you can do without it (you can do without surround at all if you have to) and it does require a room where you have more space behind you than you need to get a 5.1 channel system in place.
David Aiken
The 5 speakers are in the ITU configuration(?) but I suspect it might be better (and extremely costly) to add two sidefill speakers and/or rear center(s) for movie soundtracks.
Guess I also need to look at the spec requirements for 5.1 and 7.1 soundtracks. What forces the player/receiver to "fold" 7.1 into 5.1? This seems a fairly nontrivial task for PCM, TrueHD and DTS HD MA soundtracks.
"What forces the player/receiver to "fold" 7.1 into 5.1?"
Simply the fact that you tell the receiver you have a 5.1 system rather than a 7.1 system. It's already doing similar sorts of things if you tell it you don't have a centre speaker or if it's a 5.1 soundtrack and you've told it you have a 6.1 or 7.1 system. I suspect all that gets done to fold 7.1 to 5.1 is that the rear surround info is added to the side surround channel on that side.
David Aiken
Well, I still tend to run a lot of native 5.1 stuff in 5.1 though my system is 6.1.
I vacillate between using the extra channel all the time and using it only for 6.1 soundtracks (don't have a hi def source so no native 7.1 tracks available to me). I tend not to notice any downsides to listening to 5.1 soundtracks in 6.1 but I don't think the gain is as much as with a native 6.1 track, and I sometimes decide to go purist and listen to the soundtrack in however many channels it was actually mastered in. I'm currently in a purist mood but last week I wasn't.
So I'll plead guilty some of the time. :-)
David Aiken
Like you I can listen to 5.1 in 6.1. I have done direct comparisons of the two and 6.1 is more enveloping and more of an acoustic "bubble" than
5.1.
I've tried direct comparisons too. I certainly do find it more enveloping but I don't find the effect as strong as I do when the movie has a genuine 6.1 channel soundtrack. I can take it or leave it with 5.1 soundtracks and, as I said, I do swap between taking it or leaving it with them. I never feel that way when the movie has a 6.1 sound track.
David Aiken
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