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Discussion Starter · #1 ·
Hello,

Im having an issue with passing LPCM 5.1 audio from my computer to my pioneer elite reciever. What im trying to do is feed the LPCM audio(one dvi port on the 4850) to my pioneer elite reciever, which is connected to a 50in DLP. But i want to have the 50in turned off and have the other dvi connection on the 4850 going to my pc monitor. What happens is when i turn off the 50in the audio also cuts off and all i get is video on my PC Monitor. I have vista 64 bit with catalyst 8.6. i tried using the analog ports for multichannel to my pioneer but they sound bad. I believe the two front speakers have bass even though i have a sub which is not producing bass. when i do the vista sound test i hear all channels fine, so it must be an audio calibration thing. But i rather go the dual dvi route if possible. Can one port pass audio while the other feeds video?
 

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From what I've seen so far with mine, the HDMI audio driver shuts off as soon as the video path is broken (e.g. once the display is turned off). You can possibly get the same result from something like the DVI Detective which will sit between the PC and the display and send a permanent 'on' signal to the PC.
 

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Discussion Starter · #3 ·
Thats what i figured. I dont mind going the multichannel analog route. Do you know of any audio calibration software? Like i said it does not sound that good on my speakers.


Thanks
 

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Quote:
Originally Posted by joeyg2391 /forum/post/14164930


Thats what i figured. I dont mind going the multichannel analog route. Do you know of any audio calibration software? Like i said it does not sound that good on my speakers.


Thanks

HDCP. Also, there might be sync issue too...
 

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I was able to get audio from one dvi and pass video to my computer lcd with the other dvi and both dvis can pass audio for sure. My card is visiontek.

Quote:
Originally Posted by joeyg2391 /forum/post/14164852


Hello,

Im having an issue with passing LPCM 5.1 audio from my computer to my pioneer elite reciever. What im trying to do is feed the LPCM audio(one dvi port on the 4850) to my pioneer elite reciever, which is connected to a 50in DLP. But i want to have the 50in turned off and have the other dvi connection on the 4850 going to my pc monitor. What happens is when i turn off the 50in the audio also cuts off and all i get is video on my PC Monitor. I have vista 64 bit with catalyst 8.6. i tried using the analog ports for multichannel to my pioneer but they sound bad. I believe the two front speakers have bass even though i have a sub which is not producing bass. when i do the vista sound test i hear all channels fine, so it must be an audio calibration thing. But i rather go the dual dvi route if possible. Can one port pass audio while the other feeds video?
 

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Quote:
Originally Posted by rmh724 /forum/post/14166570


I was able to get audio from one dvi and pass video to my computer lcd with the other dvi and both dvis can pass audio for sure. My card is visiontek.

Great. I have VisionTek card too. Were you able to get audio on non standard resolution(anything other than 1080p, 720p, 480p) with this setup ?
 

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Audio doesn't change with video resolution so yes.

Quote:
Originally Posted by ajamils /forum/post/14166647


Great. I have VisionTek card too. Were you able to get audio on non standard resolution(anything other than 1080p, 720p, 480p) with this setup ?
 

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Discussion Starter · #9 ·
I have the same card and it doesnt work for me. What drivers are u using? I used the 8.6 and realtek 1.6
 

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Quote:
Originally Posted by rmh724 /forum/post/14166570


I was able to get audio from one dvi and pass video to my computer lcd with the other dvi and both dvis can pass audio for sure. My card is visiontek.

Hold on... are you saying that you can get audio from both DVI ports from 4850?
 

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What I would like to do is send one HDMI port to the Gefen 4x2 HDMI video switcher, and have the other HDMI port go to the Receiver for audio only.


Can the 4850 do this?


~Jay
 

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This configuration (one DVI port to AVR with the ATI dongle and the other DVI port to the display device) works fine. You can choose either clone mode or extended desktop mode (in the latter case mouse and windows could jump to the second half of the extended desktop). However PowerDVD 8 does not work in this configuration. It immediately freezes or there is no audio at best. TMT works fine.

Edited


After I rechecked audio configuration in the sound dialog box (actually I did not change anything though), PowerDVD 8 suddenly began working!! Now HDMI audio works normally with PowerDVD 8 (in both speaker mode and exclusive mode).


Clone Mode



Extended Desktop Mode






This configuration is very close to Any GeForce graphics card + GeForce 8200 HDMI audio work together perfectly . Video and audio just come from the same GPU (HD 4850) instead of two separate GPUs.






 

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I actually got three displays to work at 1080i last night. I plugged in the component connector, the straight DVI, and the HDMI connectors. I can switch between any of them and I assume I can run any two of them at once.


However, I can not test the HDMI audio because my receiver doesn't work with the HDMI adapter YET!
 

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Quote:
Originally Posted by renethx /forum/post/14170498


This configuration (one DVI port to AVR with the ATI dongle and the other DVI port to the display device) works fine. You can choose either clone mode or extended desktop mode (in the latter case mouse and windows could jump to the second half of the extended desktop). However PowerDVD 8 does not work in this configuration. It immediately freezes. TMT works fine.

Which mode do you think is better ? Clone mode or Extended desktop mode ? I'm currently using the same configuration in extended desktop mode.
 

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Quote:
Originally Posted by ajamils /forum/post/14171283


Which mode do you think is better ? Clone mode or Extended desktop mode ? I'm currently using the same configuration in extended desktop mode.

Not sure. The difference is that in clone mode the same picture as the primary display is sent to AVR, while in extended mode, the second half of desktop (a blank wallpaper) is sent to AVR. (You can see these pictures if you connect another display to AVR.) Maybe the latter consumes less power?

Edited


I did a quick power consumption test. When playing back a BD movie with TMT, the extended desktop mode consumes a couple of watts less power.
 

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I used to have the same problem with my Philips 42" LCD but here's the kicker, i recently changed to a Panasonic 42PZ80U and i no longer have this issue. I can just turn off the TV, audio stops for about 4 seconds then it resumes playing with the TV off. No skipping.
 

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Discussion Starter · #20 ·
i tested it again and audio turned off after i turned off the tv. Really hope driver update can fix this but i doubt it
 
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