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Gefen HDMI Detective Plus questions

post #1 of 9
Thread Starter 
Quick background:
  • I'm looking to upgrade to bluray and get a new AVR. However, I want my AVR to only handle audio, as I already have a DVDO VP30 handling video switching and processing.
  • I'm also wanting to allow the rest of the family to enjoy Blurays using the TV speakers (simpler for them), while I want to use the AVR for surround sound.
  • Few AVR's support a "HDMI Passthrough" mode while in Standby, so I'm trying to determine if there is another way to accomplish the goal. That would free me up to a wider selection of AVR's that I could buy.

My current plan:
  • Get an HDMI splitter, 1 output to the VP30 and 1 output to the new AVR
  • Ideally the HDMI splitter would allow one device (tv) to negotiate video while the other (avr) negotiates audio, and if the AVR was off would allow the one active device (tv) to negotiate both video and audio. However since I don't think such a device exists, ...
  • Get an EDID manager such as the Gefen HDMI Detective Plus to force the audio mode

My questions:
  • The Gefen supports a "default EDID" mode that includes the following (user manual here, below is taken from the table on page 7):
    Quote:


    Linear PCM 2
    Linear PCM 8
    Linear DTS
    Linear AC-3

    Does this mean that EDID will allow ANY of those audio track modes to be used? Or ALL available (e.g. full surround AND downmixed 2ch tracks will be sent)?
  • If the answer above is "ANY," then how does the Bluray player decide what audio format to use?
  • If the above scenario allows me to get full 8ch LPCM data from the bluray player, what will the TV do to the received signal? Will a 2ch LPCM stream ALSO be sent and the TV will listen to that? Or will this still not allow me to use the TV speakers alone when the AVR is disabled?

Thanks in advance,
..dane
post #2 of 9
The EDID is describing capabilities of the display device. I believe the short answer to your question is "Any". The BD player will decide based on its setup, and very likely also based on the disc authoring.

But I'm not sure that device will do what you want - if it's presenting the generic EDID all the time, won't it prevent the advanced audio codecs from being passed? And also, if you select that EDID generic #5, it would also seem possible that the TV could get a DTS bitstream - which most TVs don't support (but coming soon to Samsung, and hopefully others).

A couple of alternative suggestions:

1) Buy an inexpensive, second BD player for "the family", hook the HDMI directly to the TV, put it on the easiest input (if it can be named Blu-Ray, etc.), and be done. They use it with the TV speaker, and "yours" is through the AVR and the VP30...

2) Buy a Harmony or other friendly remote so anyone can utilize the surround system.

Just some ideas instead of throwing more HDMI at the problem!

Jeff
post #3 of 9
Thread Starter 
Quote:
Originally Posted by jautor View Post

The EDID is describing capabilities of the display device. I believe the short answer to your question is "Any". The BD player will decide based on its setup, and very likely also based on the disc authoring.

But I'm not sure that device will do what you want - if it's presenting the generic EDID all the time, won't it prevent the advanced audio codecs from being passed? And also, if you select that EDID generic #5, it would also seem possible that the TV could get a DTS bitstream - which most TVs don't support (but coming soon to Samsung, and hopefully others).

A couple of alternative suggestions:

1) Buy an inexpensive, second BD player for "the family", hook the HDMI directly to the TV, put it on the easiest input (if it can be named Blu-Ray, etc.), and be done. They use it with the TV speaker, and "yours" is through the AVR and the VP30...

2) Buy a Harmony or other friendly remote so anyone can utilize the surround system.

Just some ideas instead of throwing more HDMI at the problem!

Jeff

I like those ideas ... Also looking at a Denon 1910 that seems to support hdmi passthrough in standby mode..

thinking out loud I'm just trying to consider all options. I'd rather give the cooky ideas a shot than not even consider them. Sometimes the cooky-est idea leads to a breakthrough!

thanks for the ideas!!

..dane
post #4 of 9
Quote:
Originally Posted by audiodane View Post

Quick background:
  • I'm looking to upgrade to bluray and get a new AVR. However, I want my AVR to only handle audio, as I already have a DVDO VP30 handling video switching and processing.
  • I'm also wanting to allow the rest of the family to enjoy Blurays using the TV speakers (simpler for them), while I want to use the AVR for surround sound.
  • Few AVR's support a "HDMI Passthrough" mode while in Standby, so I'm trying to determine if there is another way to accomplish the goal. That would free me up to a wider selection of AVR's that I could buy.

My current plan:
  • Get an HDMI splitter, 1 output to the VP30 and 1 output to the new AVR
  • Ideally the HDMI splitter would allow one device (tv) to negotiate video while the other (avr) negotiates audio, and if the AVR was off would allow the one active device (tv) to negotiate both video and audio. However since I don't think such a device exists, ...
  • Get an EDID manager such as the Gefen HDMI Detective Plus to force the audio mode

They will not negotiate like this. HDMI stays active and communicates regardless of whether the device is on or off, as long as it is plugged in. If you run an HDMI splitter, then everything will be limited to 2-channel, because the source will still communicate with the TV. Using an EDID manager to send the wrong EDID won't achieve what you want. You could trick the source into thinking the TV supports high-res, but the TV will not be able to handle that and give you static noise, if anything, so this doesn't accomplish audio to the TV without manually changing this all the time which will be a major PITA.

Best route is either a 1-in 2-out HDMI switcher so the source only sees either the AVR for lossless surround or the TV for stereo PCM; or you could just add a dedicated BD player for cheap at the TV for ease of use for the family.

Or as mentioned, invest in a good remote and just program all the macros right so your family can use the system with the AVR and everything easily and it avoids this hobbled-together route.

Quote:


My questions:
  • The Gefen supports a "default EDID" mode that includes the following (user manual here, below is taken from the table on page 7):

    Does this mean that EDID will allow ANY of those audio track modes to be used? Or ALL available (e.g. full surround AND downmixed 2ch tracks will be sent)?
  • If the answer above is "ANY," then how does the Bluray player decide what audio format to use?
  • If the above scenario allows me to get full 8ch LPCM data from the bluray player, what will the TV do to the received signal? Will a 2ch LPCM stream ALSO be sent and the TV will listen to that? Or will this still not allow me to use the TV speakers alone when the AVR is disabled?

As mentioned, the source will just give you whatever the best common EDID it sees supports. If it sees 2-channel TV and a high-res AVR, it will jus give you stereo to everything. If you trick it with an EDID manager type device so it doesn't see the TV's 2-channel limits and just sees two high-res or surround capable devices, it will give you that but the TV won't handle that and will give you static in which case you've accomplished nothing.
post #5 of 9
Thread Starter 
Thanks guys for the help! Will scrap this approach and keep thinking up other crazy ideas!

..dane
post #6 of 9
Get an HDMI capable receiver, Get a Harmony, hide your other remotes and tell your family this is the only way to control everything, problem solved, hook it up however you want to.
post #7 of 9
Thread Starter 
Quote:
Originally Posted by bluewaves View Post

Get an HDMI capable receiver, Get a Harmony, hide your other remotes and tell your family this is the only way to control everything, problem solved, hook it up however you want to.

thanks... I just don't want the receiver to have to be on every time they want to watch sesame street...

cheers,
..dane
post #8 of 9
Sorry for posting in this old thread but I figured my question isn't really worth a separate one.


I just got the HDMI Detective because I had HDMI handshake problems with my HTPC -> AVR (Denon AVR-1910) -> Panasonic plasma TV setup from time to time.
Been testing the Detective a bit and it seems to have resolved my problems (can't say for sure yet since the problem didn't occur that often...).

Before I bought it I think I read somewhere (don't remember where, sorry), that this device would also get rid of the short audio dropout that occurs when you turn off the TV. Didn't work for me. While not a huge problem, it would be nice to keep the music playing while you turn off the TV, instead of losing ~1 sec of audio.
Anyway, is this even possible? Maybe I just misinterpreted something and everything's fine this way.


Please let me know, thanks!
post #9 of 9
This is for GEFEN HDMI DETECTIVE PRO users.
Can anyone enlighten me to why I can no longer play BluRay via my HTPC......its all along story but after two years of being able to play BluRay movies through my HTPC without any problem's I suddenly loose the display link... HTPC- YAMAHA RX667 RECEIVER-SAMSUNG TV , error notice on TV screen( connection problem) so I thought this must be the dreaded EDID problem anyway I connected up my GEFEN which I have owned for several years but never used it ..till now that is! after several attempts I was able to re-establish the connection link everything seem to work apart from the above problem..any advise would be most well come.
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