Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Restoration tips: HD matrix surround™
#11
Just found this after making my own semi-redundant post. Tongue

Just wanted to let you know, I have a Fireface 800 at home; good audio interface in the $1000 range. Can theoretically capture at 192kHz/24bit, but with a 48kHz source I think 48kHz/24bit is entirely sufficient. Up to 8 channels. So it would be a piece of cake to do a high quality "HD matrix surround" restauration; if the decoder supports it, even with symmetrical virtually noise-free cables. Don't own any decoder myself though. If anyone feels like sending me one over for testing/doing a "HD matrix surround" for them, that'd be an option.

Personally I'm using foobars "free_dsp_surround" so far, pretty satisfying to me. (although I have no direct comparison).

I also found a SurCode Pro Logic II software decoder, but haven't tried it out yet. Seems to be an "official" thing. And some people claim that it's compatible with the original Pro Logic.

Anyway, I'm not a huge fan of the "upmixing" of the surround channel. I feel the fairest way to treat it is to simply split it up to two channels without any fancy upmixing. In the end, it's supposed to be in the back. Best I can think of would be some kind of psychoacoustic modelling thingy that makes it sound like it comes from behind when it really comes from LB and RB.

Update: Unit arrived. Seems to work as advertised. See my post "Look what I just snagged off eBay" for further details. Smile
Reply
Thanks given by:
#12
Added some note to the first post.

Idea: would be nice to make a comparison using different surround decoders; but the best way to produce an "uncontaminated" (by various factors as different sources, D/A and A/D converters, cables etc) comparison would be to use A SINGLE source connected to various decoders that would be recorded by A SINGLE capture card.

Now, who has more than one surround decoder AND a 4ch capture card?!?
Sadly my projects are lost due to an HDD crash... Sad
Fundamental Collection | Vimeo channel | My blog
Reply
Thanks given by:
#13
No need for a 4 channel card spoRv, simply run the 4 channels through a matrix encoder and capture the 2 channel output  Tongue
Reply
Thanks given by:
#14
(2021-08-24, 11:24 AM)zoidberg Wrote: No need for a 4 channel card spoRv, simply run the 4 channels through a matrix encoder and capture the 2 channel output  Tongue

Why I didn't think it by myself?!? Happy
Sadly my projects are lost due to an HDD crash... Sad
Fundamental Collection | Vimeo channel | My blog
Reply
Thanks given by:
#15
Found another post from the gread Disclord:

Quote:when the Special Edition of The Abyss had its short theatrical rerelease, I was lucky and got to hear a 'shoot-out' between Dolby Pro-Logic in the CP-65 cinema processor, the Aphex ESP-7000, the Shure HTS -5300 and the Fosgate DSL-2. The Dolby CP-65 came in dead last and sounded so slow in its attack times that you could often hear sounds moving just slightly behind the visual action - the Fosgate, while being co-designed by Jim Fosgate, Peter Scheiber and the Tate inventor, Martin Willcocks, and supposedly having adaptable time constants that continuously varied from a fast attack time of 3ms to a slow of 25ms was also, surprisingly, slow sounding with a blurred soundstage and had a lot of dialog sibilance spill to the surround channel - it also had a front soundstage that wandered L to R based on CF content. The clear winner was the Shure HTS-5300 which sounded like a fully discrete 4-track magnetic film and not a matrix - and like the Involve Surround Master, the Shure's channel separation specs are not particularly impressive - from 15 -25db depending on direction, but the Shure engineers knew how to apply the attack/decay times, etc. to achieve such stunning results. The Aphex was just barely behind the Shure, due mostly to some minor sibilance splatter. The theater was a Dolby SR equipped theater and so did not have the capability of playing stereo surround, so we couldn't check that type of playback.

So, a consumer Dolby Stereo decoder, the HTS-5300 - a non Pro-Logic one I might add, since Shure used their own patented Acra-Vector logic system, and a completely non-Dolby licensed decoder, the Aphex, beat the 'official' CP-65 decoding system for Dolby MP encoded surround titles - and by such a wide margin that it sounded like we were comparing matrix to true discrete sound.

As "our" Dolby SDU4 use basically the same hardware of CP-65, we lost the Dolby battle... Big Grin

I wonder if there are other "something"-logic based hardware decoders around, that could be up to the task...

I found these on eBay that seem interesting - on paper they have good technical features, but how they sound?

SSI Surround Sound System 4000 II - with "Dynamic logic"
NEC PLD-310 - it has a big graphic display similar to the Shure HTS-5300
Sadly my projects are lost due to an HDD crash... Sad
Fundamental Collection | Vimeo channel | My blog
Reply
Thanks given by:
#16

ADMIN NOTE:
some posts from this thread were moved into a new one; you can find it here: https://forum.fanres.com/thread-4362.html

Sadly my projects are lost due to an HDD crash... Sad
Fundamental Collection | Vimeo channel | My blog
Reply
Thanks given by:


Possibly Related Threads…
Thread Author Replies Views Last Post
  Restoration tips: PaNup™ spoRv 66 52,041 2021-11-03, 04:42 PM
Last Post: spoRv
  Restoration tips: De-logo Patch Technique™ spoRv 13 8,987 2021-11-02, 11:12 AM
Last Post: Hitcher
  Capture tips: grab laserdisc video and multiple audio in one pass spoRv 0 207 2021-08-27, 01:35 PM
Last Post: spoRv
  Restoration tips: UAR - Ultimate Aspect Ratio spoRv 39 39,570 2019-02-03, 03:12 AM
Last Post: CaveDoctor
  Restoration tips: DaLucc™ spoRv 4 4,462 2019-01-16, 01:48 AM
Last Post: CaveDoctor
  Restoration tips: De-Dutch™ spoRv 5 4,179 2018-04-12, 02:55 AM
Last Post: spoRv
  Restoration tips: analog capture spoRv 9 9,052 2018-03-29, 05:02 PM
Last Post: Jetrell Fo
  Restoration tips: the Slice Technique™ spoRv 1 4,716 2018-03-07, 07:42 AM
Last Post: spoRv
  Restoration tips: Overlap matching spoRv 14 12,444 2017-09-06, 07:46 AM
Last Post: spoRv
  Restoration tips: Soft+Open Matte™ (a.k.a. YAO™) spoRv 15 12,841 2017-07-01, 04:03 AM
Last Post: spoRv

Forum Jump:


Users browsing this thread: 1 Guest(s)