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#63793 - 01/29/07 09:50 AM Switching multi-channel surround sound
Scott Gammans Offline
Gunslinger

Registered: 01/15/06
Posts: 27
Loc: Ashburn, VA
I've got two multichannel surround sound sources, the Toshiba HD-XA2 HD-DVD player and the Panasonic DMP-BD10 Blu-ray player. In order to enjoy the ultra-high-quality sound that the Blu-ray and HD-DVD formats offer, I have to connect both of these players to the Outlaw 990 using RCA phono connectors (Toslink and digital coaxial connections don't have the required bandwidth to carry high definition sound, and of course the Outlaw 990 doesn't accept audio signals over HDMI) and let the players decode the advanced codecs for PCM streaming to the 990.

Both of these players need to share the one set of 7.1 channel direct inputs on the Outlaw 990. And therein lies the problem. Here's what I've tried so far to deal with this conundrum:
  • Use three Radio Shack A/B switches. Worked for the DMP-BD10, but the HD-XA2's analog outputs stream out so apparently weak a signal that they couldn't get past the A/B switch--all I got was deafening silence. It wasn't the switches or cabling at fault, either--I switched the cables and A/B switch inputs to the DMP-BD10 and it worked fine.
  • Use six Y-adapters. I tried the combiner approach using six 2 female-->1 male Y-adapters where a pair of channels--one from each player--is connected to the female RCA ends of the Y-adapter. The male end is then plugged into the appropriate channel. Rinse and repeat for the other five channels. It worked, but it also lowered the signal strength on each channel so much that I had to crank up the Outlaw 990 about 5 dB to compensate, which is unacceptable--I'm already running the preamp at around -5 dB for movies... that would mean running the amp at 0 dB which risks the sound getting distorted.


So that's where I stand right now. The next thing I'm going to try is using a component video switcher. Wal*Mart, Best Buy, Zektor and others sell component video switchers that could possibly be adapted for use as 5.1 channel surround switchers, provided that each input includes a composite video connector and that connector is switched even when signals are coming in on the component video connectors. The problem here is price--some of these switchers (e.g., the Zektor) are VERY expensive (~ $500)... it might be more cost-effective to sell my Outlaw 990 and buy an AVR that does HDMI, but I really don't want to part with my 990.

If I've missed any alternatives above, let me know... otherwise I'll report back my results with the component video switcher approach.
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Outlaw 990/7700 | Rocket RS760 fronts, RSC200 center, 4 RSS200 surrounds | SVS PB12-Ultra/2 sub | ScreenPlay 333 projector | Panasonic DMP-BD10 | Toshiba HD-XA2 | TiVo HR10-250 | Lumagen VisionHDP scaler | Denon DVD-2910 DVD | Motorola QIP-6416 DVR

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#63794 - 01/29/07 11:28 AM Re: Switching multi-channel surround sound
gonk Offline
Desperado

Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
This is one of those issues that I've long wondered about - it's an issue for you, and it is or will be an issue for plenty of others as the format war continues. Four years ago, people were wrestling with the same thing because of DVD-A and SACD, but the two most common solutions at that time (Sony's TA-E9000 switch companion to the P9000 and a home-built box by Shawn Fogg) have both disappeared from the market thanks to time and the proliferation of universal players. At this point, I don't know that there is a single good and affordable solution. The closest that exists are things like this discontinued Zektor and its pseudo-replacement , neither of which will do 7.1 even assuming you don't mind the price ($260 for the current Zektor). If you could find a pair of decent component video switches, that'd be an option. Something like this would work if the digital audio connection would cooperate (not sure from the picture if it would, though).
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gonk
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#63795 - 01/29/07 12:06 PM Re: Switching multi-channel surround sound
Scott Gammans Offline
Gunslinger

Registered: 01/15/06
Posts: 27
Loc: Ashburn, VA
Actually gonk, all that I would need to be able to do as an interim solution is switch 5.1 channels. The Toshiba HD-XA2 only has 5.1 outputs, so I can just permanently plug in the surround back left and right channels from the Panasonic DMP-BD10 and only switch the remaining 5.1 channels.

It's really amazing to me that this problem is turning out to be so difficult to solve. It seems as though the consumer electronics industry has made a collective decision that switching multichannel high-definition surround sound will be accomplished solely by switching HDMI. That's great for the future, but what about legacy systems like most of us mere mortals have?
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Outlaw 990/7700 | Rocket RS760 fronts, RSC200 center, 4 RSS200 surrounds | SVS PB12-Ultra/2 sub | ScreenPlay 333 projector | Panasonic DMP-BD10 | Toshiba HD-XA2 | TiVo HR10-250 | Lumagen VisionHDP scaler | Denon DVD-2910 DVD | Motorola QIP-6416 DVR

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#63796 - 01/29/07 12:19 PM Re: Switching multi-channel surround sound
gonk Offline
Desperado

Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
I'm also surprised that there has not been more done on this front, especially after all the heartburn that people went through with DVD-A and SACD. I'd hoped that the arrival of even one of the new HD formats would have been enough in conjunction with the existing DVD-A/SACD user base to generate one or two good <$250 switching solutions. The closest I've seen is that Zektor HDS41, and I hadn't even noticed it until we got into this discussion today...
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gonk
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#63797 - 01/29/07 12:45 PM Re: Switching multi-channel surround sound
Skyblazer Offline
Gunslinger

Registered: 03/21/06
Posts: 255
Loc: Spokane, WA
but untill the universial SACD and DVD-audio players came out.. both of those audio formats were really struggling to gain acceptance by consumers. Even now several years later.. it appears DVD-audio has lost out and SACD is only a audiophile format.

I think we'll soon begin to see those universal players now begin omitting DVD-audio from its playability.. and only keep SACD. but that's just my .02 smile
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Outlaw Audio 990 pre amp
Adire Audio sub (SVS 12.2 driver)
CAL Alpha tube DAC
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#63798 - 01/29/07 12:59 PM Re: Switching multi-channel surround sound
gonk Offline
Desperado

Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
I don't think we'll see DVD-A support disappear, and for one simple reason - it's too easy to include. The chipsets that player manufacturers are using anyway support DVD-Audio, so that all you have to do is enable that feature in the software and you can add another bullet point to your player (not to mention getting a thumbs up from those DVD-A owners) for almost no cost whatsoever. This happened with the OPPO 971H. It actually went to market initially without DVD-A support, but they had a multichannel analog output for Dolby Digital and DTS and realized that the chipset supported DVD-A if they only enabled it in the firmware. SACD is more complex, since it uses DSD instead of PCM, but SACD support is hanging around because that format is still seeing software growth. If we ever can move to HDMI and survive the HDCP horrors that come with it, it'll be even easier for player manufacturers to continue including DVD-A because they can do it while omitting the multichannel analog outputs that SACD and DVD-A both require. It's similar to why Video CD support shows up on most DVD players: there's very little consumer interest in it, but it's so easy to do with the hardware required for a DVD player anyway that it's almost silly not to include it.
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#63799 - 01/29/07 06:59 PM Re: Switching multi-channel surround sound
Scott Gammans Offline
Gunslinger

Registered: 01/15/06
Posts: 27
Loc: Ashburn, VA
Sadly, my science experiments with using component video switchers for switching 5.1 channel surround sound were all failures. I tested three different switchers (Radio Shack's 4->2 switcher, the Philips switcher sold by Wal*Mart, and a friend's Zektor) and all of them (even the Zektor!) introduced some amount of signal strength degradation and/or audible noise into the PCM stream.

Regrettably, this leaves me with no other choice but to start looking at the various A/V receivers on the market that accept HDMI 1.1 or better, and to put the Outlaw 990 up for sale. Oh well, at least I'm still an Outlaw with my trusty 7700. And when the day comes that I replace my projector with one that is HDMI 1.3-compliant, I'll definitely give Outlaw my business if their follow-on to the 990 is HDMI 1.3 as well (I can't imagine that it wouldn't be).

Thanks gonk, for all your help with my 990 over the past ten months. It's a great preamp! I just wish it would magically sprout some HDMI inputs. frown
_________________________
Outlaw 990/7700 | Rocket RS760 fronts, RSC200 center, 4 RSS200 surrounds | SVS PB12-Ultra/2 sub | ScreenPlay 333 projector | Panasonic DMP-BD10 | Toshiba HD-XA2 | TiVo HR10-250 | Lumagen VisionHDP scaler | Denon DVD-2910 DVD | Motorola QIP-6416 DVR

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#63800 - 01/29/07 07:05 PM Re: Switching multi-channel surround sound
gonk Offline
Desperado

Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
One thing that I don't think I even looked for was the possibility of a used Sony TA-E9000ES (the multichannel analog switch that was released so that their TA-P9000 would work with multichannel SACD). It's been discontinued for a number of years, but had a huge popularity for a while among folks trying to run both DVD-A and SACD...
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#63801 - 01/29/07 07:13 PM Re: Switching multi-channel surround sound
Bill O Offline
Gunslinger

Registered: 08/14/06
Posts: 164
Loc: Missouri
Scott, what will you be asking for your 990?

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#63802 - 01/29/07 08:04 PM Re: Switching multi-channel surround sound
nfaguys Offline
Desperado

Registered: 04/09/05
Posts: 500
Loc: Maine
A very simple workaround, though probably not of much interest in this forum is a patchbay. It allows me to feed the 990 from my analog outputs of Oppo 981, Sony dvd jukebox and my hard drive machine with multi-channels. It is "normalled" to the hard drive Alesis macchine and patched as desired. Should I wish reassignment without getting to the back it's very easy. Objections would include having short patch cords in front. Fortunately Mrs. Nfaguys knew what she was getting many years ago laugh
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Living Room:
5.1 Surround and 4channel inline room
990/7700/6-KEF-107s/LFM1 x 2/ SMS Awaiting Trinnov
Millenium dts decoder;Digital Director
Players: Tascam CD01U/SonyCX455 x 3/DV955/BDP83
Old Sony 60" SXRD TV
Zone 2 (also liv-Room: listening to music while Mrs watches TV): Crown SL2 preamp/D40 Amp/Stax Headphones



My "Man-cave":
4 channel-only inline room. No TV (thank heaven)!!!
990/755/4-KEF 107s
Tascam CD01U/dts decoder/digital director
Alesis 16x4x2 mixer
Recorders Alesis HD24/ML9600/Crown CX844s/SonyDAT/Tascam DA38
Ham Radio Shack (KB1STH) ICOM/Yaesu/Drakes x 3

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