[mythtv-users] Nvidia 8400GS SPDIF/HDMI pass through.. how?

Roy Lofthouse lofty69 at gmail.com
Tue Oct 6 12:22:42 UTC 2009


2009/10/6 Bill Williamson <bill at bbqninja.com>:
> On Tue, Oct 6, 2009 at 8:51 PM, Roy Lofthouse <lofty69 at gmail.com> wrote:
>> 2009/10/6 Nick Rout <nick.rout at gmail.com>:
>>> On Tue, Oct 6, 2009 at 9:25 AM, Dan Ritter <dsr-myth at tao.merseine.nu> wrote:
>>>> On Mon, Oct 05, 2009 at 08:47:42PM +0100, Roy Lofthouse wrote:
>>>>> I'm running a pure dvi cable, but will test with a dvi-hdmi cable
>>>>> tomorrow.  I'm starting to think it's a hardware issue.  My SPDIF
>>>>> header only has three pins and I went off the connector that was
>>>>> already there (Black/Red and White wires).
>>>>
>>>> DVI doesn't carry sound. Only a cable that is HDMI from one end
>>>> to the other will carry sound.
>>>
>>> Untrue. The audio and video are muxed into one stream. DVI will carry
>>> that stream whether or not it has audio, its just that displays with a
>>> DVI port don't have any logic to extract the audio. However a DVI to
>>> HDMI cable will fix that.
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>>
>> Thanks to all who replied.. turns out it was just the connector that
>> needed the pins changing.. I was loathe to do this again as the first
>> time I did the system would not power up... so I left the GND and
>> swapped the SPDIF over to the only other connector and voila!
>>
>> Only things is I had to disable AC3 and DTS passthrough to get some of
>> my vids sounds to work.
>
>
> You were very very lucky.  That other pin was +5v to power an optical
> diode for optical out.  Be sure to read your motherboard manual before
> trying something like that rather than randomly picking pins or you
> could fry your video card.
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I would have if the board had one, also the connector had no labels..
so a guess it had to be.  The board is an old fujitsu scaleo e
thing... so if anyone is doing this in future the gnd is the one
nearest the power supply and the spdif is the middle one.


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