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PC DVI into HDMI Plasma

  #1  
Old 05-29-2010, 09:26 AM
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PC DVI into HDMI Plasma

Hi guys,

I hope this is the right place to post this question.

I recently connected a PC of mine into my Sony Plasma screen. I used a DVI - HDMI cable, now the video works fine, the only thing that isn't working is the Audio.

I've tried playing with the plasma settings and the computer settings but I just can't get audio from the HDMI cable.

So I had two questions:

1- would a DVI to HDMI cable transmit Audio as well as video?

2- Any idea why I'm having difficulty getting audio from the dvi-hdmi cable?

The computer is running windows 7 and the Plasma screen is connected to a surround sound system, but audio does not work through the TV speakers or the surround sound system speakers.

Any help or ideas would be appreciated
 
  #2  
Old 05-29-2010, 10:00 AM
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1. No.
2. DVI doesn't transmit audio.



Pin 1 TMDS Data 2− Digital red − (Link 1)
Pin 2 TMDS Data 2+ Digital red + (Link 1)
Pin 3 TMDS Data 2/4 shield
Pin 4 TMDS Data 4− Digital green − (Link 2)
Pin 5 TMDS Data 4+ Digital green + (Link 2)
Pin 6 DDC clock
Pin 7 DDC data
Pin 8 Analog vertical sync
Pin 9 TMDS Data 1− Digital green − (Link 1)
Pin 10 TMDS Data 1+ Digital green + (Link 1)
Pin 11 TMDS Data 1/3 shield
Pin 12 TMDS Data 3- Digital blue − (Link 2)
Pin 13 TMDS Data 3+ Digital blue + (Link 2)
Pin 14 +5 V Power for monitor when in standby
Pin 15 Ground Return for pin 14 and analog sync
Pin 16 Hot plug detect
Pin 17 TMDS data 0− Digital blue − (Link 1) and digital sync
Pin 18 TMDS data 0+ Digital blue + (Link 1) and digital sync
Pin 19 TMDS data 0/5 shield
Pin 20 TMDS data 5− Digital red − (Link 2)
Pin 21 TMDS data 5+ Digital red + (Link 2)
Pin 22 TMDS clock shield
Pin 23 TMDS clock+ Digital clock + (Links 1 and 2)
Pin 24 TMDS clock− Digital clock − (Links 1 and 2)
C1 Analog red
C2 Analog green
C3 Analog blue
C4 Analog horizontal sync
C5 Analog ground Return for R, G and B signals
 
  #3  
Old 05-29-2010, 11:13 AM
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Ahhhh I see,

Thank for that dude, really appreciate it, I was a bit confused because the other side is HDMI and I thought since it's HDMI then it should include Audio, guess not.

I guess I Have to connect it to a VGA cable and use a normal audio wire for sound.

Thanks for the help buddy
 
  #4  
Old 05-29-2010, 01:55 PM
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Originally Posted by Defratos View Post
Ahhhh I see,

Thank for that dude, really appreciate it, I was a bit confused because the other side is HDMI and I thought since it's HDMI then it should include Audio, guess not.

I guess I Have to connect it to a VGA cable and use a normal audio wire for sound.

Thanks for the help buddy
Why would you need to go vga? You can still use dvi to hdmi for digital video and go normal analog audio cable for the sound.
 
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Old 05-29-2010, 02:24 PM
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Some units are "smart" and will only take audio in via HDMI if it's plugged in, but most should have a audio input toggle somewhere.
 
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Old 06-01-2010, 09:04 AM
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use DVI for video and an optical for sound

if you are a surround sound buff....you will not be able to access Dolby Digital True HD or DTS-MA with an optical cable, only HDMI

you can only access Dolby Digital and DTS with an optical cable

or

you can buy a headphone to RCA converted for easy sound but so-so quality
 
  #7  
Old 06-01-2010, 09:21 AM
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damn I forgot about this thread, sorry guys.

Yeah the main reason I was going to VGA was because even when I plug an analog audio cable with the HDMI plugged in I can only access the sound when I'm on the analog channel and not the HDMI, but I think I just need to change the audio input as wrathernaut has suggested.

Thanks for the feedback guys.
 
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Old 06-01-2010, 07:31 PM
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Isn't there a DVI + audio into HDMI converter cable or module?
 
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Old 06-01-2010, 07:35 PM
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when you use dvi out from a pc or mac it doesnt disable the internal sound card on your machine. you have to run audio separately
 
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Old 06-01-2010, 07:43 PM
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Audio through the DVI port is a toughie... it really depends on your video card. Some video cards have an HDMI adapter that will send sound with the video through a standard HDMI cable. But DVI alone does not normally carry sound.
 
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Old 06-01-2010, 08:19 PM
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just take your dvi-hdmi cable, and an 1/8" stereo to RCA cable... use some duct tape to strap them together and now you have a custom cable for your application
 
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Old 06-01-2010, 08:48 PM
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I think the biggest problem is that HDMI audio is digital, all audio a computer puts out is analog (unless you got a good audio card).
Not only would you need a hdmi to dvi, but also a module to convert analog audio to digital.
Sucky.
 
  #13  
Old 06-01-2010, 08:55 PM
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there's nothing analog about the sound coming out of your computer. ultimately you have to think about where the digital signal ends and is converted to usable sound for your speakers.

a standard "analog" audio cable can support up to 24 bit 192hz... but most sound cards don't. that's were you should start looking to a nice external USB DAC
 
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Old 06-02-2010, 01:03 AM
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Originally Posted by sammy_G View Post
there's nothing analog about the sound coming out of your computer. ultimately you have to think about where the digital signal ends and is converted to usable sound for your speakers.

a standard "analog" audio cable can support up to 24 bit 192hz... but most sound cards don't. that's were you should start looking to a nice external USB DAC
Unless you're talking about the HDMI audio signal, an optical or digital coax output, then it's analog coming out of the computer.
 
  #15  
Old 06-02-2010, 08:15 AM
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O.o ok I'm a bit lost now with all this tech talk lol

I appreciate the help, I'll try and understand what all the above means and reply back if I still have problems. thanks/
 

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