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Best Demos for Dolby Pro-Logic IIx ... here is one


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#1 of 62 OFFLINE   MaxMenon

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Posted May 05 2004 - 02:03 AM

Having got my Yamaha HTR-5760 in my system for a week ... I was curious to explore the hype behind DLPIIx. I have a 7.1 setup.

Last night we watched ...

IDENTITY (2003)

This is a Dolby Digital 5.1 disc.

Absolutely stunning ... never before have I experienced this much discrete information coming from each of the four surround speakers.

To double the fun I highly recommend that you have transducers mounted under the couch ... no sub-only setup can equal this experience.

Highly recommended. Especially, if Amanda Peet catches your fancy.

Max

#2 of 62 OFFLINE   Ed Moxley

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Posted May 05 2004 - 04:39 PM

Will have to check it out.
Best movie I've seen for use of surround speakers is Master and Commander.
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#3 of 62 OFFLINE   John Garcia

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Posted May 06 2004 - 04:00 AM

Identity - average movie at best, decent sound. I would expect ANY 5.1 movie with a good mix would sound good with PLIIx, wouldn't it? Try something like Fight Club.
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#4 of 62 OFFLINE   MaxMenon

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Posted May 06 2004 - 06:56 AM

I liked Identity because I like movies that are obtuse ... kinda like "Run Lola Run" or "Lock Stock and Two Smoking Barrels" ... if you like movies that shock you to look at things from a very different angle ... then its highly recommended.

The sound of rain and thunder totally envelopes you ... if you analyze it further you realize that the surround backs are quite discrete ... a benefit of having DPLIIx.

Also ... the transducers really make scary movies scarier. Ok you younger folks might not find it too scary ... having been desensitized by video games and gory teen slasher films. I enjoyed the film.

But this thread is not about the merits of the film ... but the sound effects that are very nicely presented thanks to DPLIIx.

Max

#5 of 62 OFFLINE   LanceJ

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Posted May 06 2004 - 07:18 AM

Does DPLIIx add two more channels to the rear by somehow deriving them from the existing left and right surround channels (i.e. matrix processing)?

I'm wondering because the original DPL and DPLII were designed to generate a 5.1 sound field from (I think) specifically a stereo mix using sophisticated processing software.

Does DPLIIx "know" not to change the character of the front three channel's information? Or, does it downmix everything into a stereo mix first then reprocess it into 7.1 form? This last option would worry me.

Posted Image

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#6 of 62 OFFLINE   John Garcia

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Posted May 06 2004 - 08:09 AM

"Lock Stock and Two Smoking Barrels" - excellent flick Posted Image

PLIIx "creates" individual channels for each of the 4 rear speakers, similar to what Logic7 does, and it can be applied to most anything, not just a stereo signal, is the way I am understand it.
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#7 of 62 OFFLINE   Daryl L

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Posted May 06 2004 - 11:08 AM

DPLIIx applied to 5.1/6.1 material doesn't affect, alter or manipulate the three front channels (L/C/R) at all. It takes the Ls & Rs and decodes it into 4 surround speakers (Ls/Lb/Rb/Rs). Unfortunately I don't have DPLIIx yet.

Underworld and Blade2 have great soundtracks with quite active surrounds that you might wanna try with DPLIIx.

P.S. I saw Identity a couple of times and think its a very good movie with good acting, writing with a unique story line and an excellent sound track utilizing surrounds very effectively. :
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#8 of 62 OFFLINE   John Garcia

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Posted May 06 2004 - 11:34 AM

I know the thread is not about Identity, but while I felt it had tension and was well acted, it still did not do anything for me (I actually bought it because it was on sale for $9.99). The final ending was at least a nice twist, but the foundation was too obvious. It was a unique story the first time it was done...Agatha Christie's 10 Little Indians.

If you like this movie, you must see Memento, if you have not seen it.
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System Two: Marantz PM7200, Pioneer FS52s, Panasonic BD79
(stolen) : Marantz SR-8300, GR Research A/V-2s, Sony SCD-222ES SACD, Panasonic BD-65, PS3 60G (250G)

Everybody is a genius, but if you judge a fish by its ability to climb a tree, it’ll spend its whole life believing that it is stupid.” – Albert Einstein

 


#9 of 62 OFFLINE   Fernando Saa

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Posted May 06 2004 - 12:08 PM

I never choose DPLIIx for regular movie watching. Do you guys recommend it over the standard 5.1 or 6.1?, like LOTR the Two Towers for example. I never really tried it and I have a 7.1 system with a Yamaha RX-V2400. Right now I'm getting up and I'm gonna try it!
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#10 of 62 OFFLINE   Kevin C Brown

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Posted May 06 2004 - 12:36 PM

I also liked the surround effects of Underworld. In general, I think movies with front to back pans (along either side specifically), or pans across the back, would be the best highlighter of what DPL IIx could do.

I am still curious as to if DPL IIx can do what Logic 7 does. For example, for a front R to surround R pan, Logic 7 continues that pan to the rear R speaker. In other words, the content of the front 3 speakers aren't changed either, but Logic 7 *does* look at what's going on in the front 3 to further decide what to do for the surrounds and rears.

Will be interesting to compare someday! Posted Image

I do have it from a very reputable source, that DPL IIx is quite an accomplishment.
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#11 of 62 OFFLINE   Fernando Saa

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Posted May 06 2004 - 01:18 PM

I couldn't get DPLIIx to work, it changes automatically to surround standard when the movie starts. What am I doing wrong?
Fer

#12 of 62 OFFLINE   Jimi C

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Posted May 06 2004 - 02:44 PM

I second underworld, the movie sucks but it sounds amazing. Also U571 has a good surround track.
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#13 of 62 OFFLINE   MaxMenon

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Posted May 06 2004 - 03:38 PM

Fernando - thats the problem with the Yamaha Rcvrs ... it will not select DPLIIx when it detects the dd5.1 or dts stream ... you need to manually set it to dd5.1+DPLIIx mode.

This has been discussed in one of threads I started a few days ago.

Max

#14 of 62 OFFLINE   MaxMenon

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Posted May 06 2004 - 03:42 PM

John - I will watch Momento again (the last time I played it ... it was too late in the night and we had guests over ... etc.).

Max

#15 of 62 OFFLINE   Roger Dressler

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Posted May 06 2004 - 04:47 PM

Kevin wrote:

>>I am still curious as to if DPL IIx can do what Logic 7 does. For example, for a front R to surround R pan, Logic 7 continues that pan to the rear R speaker.<<

PLIIx does not spread a Rs signal of the 5.1 source to Rb as L7 does. Of course as the signal pans towards Ls in the source, it will pairwise pan from Rs to Rb speakers, etc.


>>In other words, the content of the front 3 speakers aren't changed either, but Logic 7 *does* look at what's going on in the front 3 to further decide what to do for the surrounds and rears.<<

Based on everything I have read, L7 does not look at the front channels when processing 5.1 sources, but maybe my understanding is incorrect. Is there some written information on this?
Roger Dressler

#16 of 62 OFFLINE   Kevin C Brown

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Posted May 06 2004 - 06:34 PM

Roger- See if the link comes through. Kind of a long (but interesting) document, but I do remember it being in here:

http://www.lexicon.c....ID=7&FileID=49
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#17 of 62 OFFLINE   Fernando Saa

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Posted May 07 2004 - 03:27 AM

Thanks MaxMenon, after tweeking a bit I figured out how to turn DLPIIx on, and you're right, it sounds like sort of more lively!, I have to check out more movies in this new set up thanks!
Fer

#18 of 62 OFFLINE   Roger Dressler

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Posted May 07 2004 - 08:16 AM

Kevin,

Thanks for the link. I have seen this document before. I suspect the passage you are referring to is on page 6:
Quote:
The new 5 channel and 7 channel surround decoding allows the stereo music in soundtracks to be reproduced with a full stereo spread, unencumbered by the relatively narrow separation of the front speakers. Left-to surround and right-to-surround pans are also enhanced. Instead of sound jumping from a front channel to both surrounds, the left and right side speakers can function independently to facilitate smooth and fluid pans. Sounds directed to hard left and hard right (the main left and right speakers) will not appear in the side surrounds.
Or maybe this one from page 21:
Quote:
Our own LOGIC 7 effect takes decoding further with the introduction of true seven channel decoding using a stereo surround process. Steered signals are panned to the front, side and rear speakers so that surround information follows the visual movement on-screen. Ambient surround information, such as stereo music in the soundtrack, is reproduced at full bandwidth and in stereo in the rear channels. Sound effects which pan to the left or right of the listener are reproduced with full realism.
They do seem to resemble what you mentioned. But all of this is referring to their 2-ch matrix decoder, not the 5-to-7 decoder. I don't find anything in their manual to suggest their 5-to-7 decoder looks at L/C/R activity. I'm not saying it is a problem--PLIIx doesn't do it either.
Roger Dressler

#19 of 62 OFFLINE   Daryl L

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Posted May 07 2004 - 08:47 AM

Roger,

I haven't read any of this but it might have some more info within.

http://world.std.com/%7Egriesngr/

I think Sanjay over at AVSForum mentioned L7 doesn't alter the L/C/R fronts but but looks at L/R front cues to decide how the side and back signals are handled but I could be wrong (gettin old and memory sux). Posted Image


John,

Sorry, I haven't seen or read Agatha Christie's 10 Little Indians or Memento So the Identity plot was totaly new to me. I'm always been the Horror/SciFi nut, my Dads the Mystery/Western nut. I have to order him Agatha Christie, Ellery Queen & Earle Stannley Gardner paperbacks every month from Amazon. He gave me a list of 6 today. Posted Image
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#20 of 62 OFFLINE   John Garcia

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Posted May 07 2004 - 10:53 AM

My mom's the murder mystery nut, got me hooked too, and exposed me to a lot of the old-school versions of what a number of current horror movies are "freshenings" of. Identity added a few nice little twists to the 10 Little Indians theme though.

Memento is a cool/bizzare movie, because of the way it was edited - you are only given blocks of info, in reverse...each subsequent block tells you what lead up to the portion you just watched. Well done, very creative. Excellent DTS track on the special edition also.
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Everybody is a genius, but if you judge a fish by its ability to climb a tree, it’ll spend its whole life believing that it is stupid.” – Albert Einstein

 






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