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| Thread ID: 89590 | 2008-05-05 06:33:00 | htpc connected to samsung PS42C91HX Plasma TV | kersonan (13264) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 666176 | 2008-05-05 06:33:00 | Hi All Long time lurker, first time poster. I have a question i'm hoping someone can answer. I have a htpc (quick specs below) AM2 AMD CPU Windows XP SP2 Liteon Bluray drive Asus 8600 graphics 2gb ram Asus mobo and a Samsung PS42C91HX 42" Plasma screen All drivers are as new a version as i can get online. The htpc is connected to the plasma from the GF8600 via a DVI to HDMI cable for picture goodness, next to the HDMI socket on the rear panel of the plasma are 2 RCA sockets audio in left/right respectively. the manual states that they are for sound input when using the HDMI socket for picture in, but heres the kicker that this wont work if the device generating the sound is a pc. What possible reason is there for this? Its worth mentioning that the sound coming out of the tv's speakers is fine if your connecting using the old school VGA type plug and a line in/line out cable from the pc. I've emailed Samsung to ask why this is but their fairly normal canned email responses seem to be of little help, I thought someone here might know why they choose to not allow sound input from a pc when your using a DVI to HDMI cable for picture. Cheers in advance. |
kersonan (13264) | ||
| 666177 | 2008-05-05 06:41:00 | Probably because DVI doesnt support sound, even if youre using a HDMI adapter | Speedy Gonzales (78) | ||
| 666178 | 2008-05-05 06:47:00 | Hi Speedy thanks for your response. Perhaps i worded this wrong, there are two HDMI input sockets on the rear panel of the plasma, the topmost one has the two rca sockets on the left of it which are marked for and specified in the manual as sound in left/right when using the HDMI socket. the manual states this but adds the disclaimer that it wont work if the device is a pc, yep your right DVI has no ability to carry sound data like HDMI but in this case there are sockets provided for sound in. I'm interested in the technical reason why it will accept HDMI for picture and normal RCA left/right sound in unless the device is a pc. |
kersonan (13264) | ||
| 666179 | 2008-05-05 06:50:00 | Hi All Long time lurker, first time poster. I have a question i'm hoping someone can answer. I have a htpc (quick specs below) AM2 AMD CPU Windows XP SP2 Liteon Bluray drive Asus 8600 graphics 2gb ram Asus mobo and a Samsung PS42C91HX 42" Plasma screen All drivers are as new a version as i can get online. The htpc is connected to the plasma from the GF8600 via a DVI to HDMI cable for picture goodness, next to the HDMI socket on the rear panel of the plasma are 2 RCA sockets audio in left/right respectively. the manual states that they are for sound input when using the HDMI socket for picture in, but heres the kicker that this wont work if the device generating the sound is a pc. What possible reason is there for this? Its worth mentioning that the sound coming out of the tv's speakers is fine if your connecting using the old school VGA type plug and a line in/line out cable from the pc. I've emailed Samsung to ask why this is but their fairly normal canned email responses seem to be of little help, I thought someone here might know why they choose to not allow sound input from a pc when your using a DVI to HDMI cable for picture. Cheers in advance. Is there only the one set of RCA inputs for audio from a PC? My Toshiba 47" LCD has one set of RCA inputs, that are labeled PC audio, that can take sound for the HDMI input or the VGA input - You have to change a setting in the menu to tell it where the sound is coming from for the HDMI input - either digitally via HDMI or analogue from the PC audio input. Edit: Just saw your second post. That is a strange setup to not accept audio via RCA from a PC. I would have thought it would be the other way round because, as you have said, DVI to HDMI does not carry audio but any other HDMI device will have audio. |
CYaBro (73) | ||
| 666180 | 2008-05-05 07:00:00 | yes indeed there is one single set of RCA left/right sound specifically for one of the HDMI sockets. And a VGA socket with a single 3.5mm Stereo plug socket that allows you to run a cable from the line out on the pc sound card to the line in associated with the VGA socket. (this works fine but suffers the limitations associated with a VGA socket) its really odd if i connect another device to the rca sound in next to the associated HDMI socket the sound works, unplug/plug into a pc sound card it stops (realtek onboard sound btw). it seems to be able to tell that the sound input is coming from a pc and kill it. Really odd when you think about it |
kersonan (13264) | ||
| 666181 | 2008-05-05 07:07:00 | yes indeed there is one single set of RCA left/right sound specifically for one of the HDMI sockets. And a VGA socket with a single 3.5mm Stereo plug socket that allows you to run a cable from the line out on the pc sound card to the line in associated with the VGA socket. (this works fine but suffers the limitations associated with a VGA socket) its really odd if i connect another device to the rca sound in next to the associated HDMI socket the sound works, unplug/plug into a pc sound card it stops (realtek onboard sound btw). it seems to be able to tell that the sound input is coming from a pc and kill it. Really odd when you think about it The only reason I can think of that they have done this is because the PC is outputting speaker level voltage while another device with RCA would only be line level voltage. If your PC had a line out rather than using the speaker out it would most likely work. Some older sound cards used to have a line out on them as well as the speaker out. |
CYaBro (73) | ||
| 666182 | 2008-05-05 07:10:00 | Ah you may well be onto something there, i'll have a dig around and see if i can find an older pci soundcard in my stash-o-bits and see if that works. Cheers for the help, very much appreciated. |
kersonan (13264) | ||
| 666183 | 2008-05-05 09:40:00 | Looking at the "connection panel " page of the manual, 8 HDMI IN 2 - Connect to the HDMI jack of a device with HDMI output. These inputs can also be used as a DVI connection with separate analog audio inputs. An optional HDMI/DVI cable will be necessary to make this connection. When using the optional HDMI/DVI adapter, the DVI analog audio inputs on your TV allow you to receive left and right audio from your DVI device. (Not compatible with PC) - When connecting this product via HDMI or DVI to a Set Top Box, DVD Player or Games Console etc, make sure that it has been set to a compatible video output mode as shown in the table below. Failure to observe this may result in picture distortion, image breakup or no picture. - Do not attempt to connect the HDMI/DVI connector to a PC or Laptop Graphics Card. (This will result in a blank screen being displayed) it seems to indicate (as you said) you cannot use it with a PC. Having said that it indicates you should not get a picture either which you seem to get okay so yes very strange. Can't say why but possibly some sort of HDCP thing? |
mattv (11815) | ||
| 666184 | 2008-05-05 11:00:00 | yeah its a weird one for sure the whole things been a bit of a mission Add bluray drive, onboard graphics cant do it, HDCP errors blah blah off to the parts shop add GF8600 solves that prob vga cable not really up to the task off to the parts shop DVI - HDMI cable much better picture sound not working through TV add speaker set Lot of mucking about just to watch bluray discs, but thats the fun of home built media boxes :) This is more of a must know the technical reason why or it will drive me nuts sorta thing. |
kersonan (13264) | ||
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