[mythtv-users] Digital Pass-through Using HDMI

[Karl Newman]

On Mon, Aug 19, 2013 at 3:42 PM, John P Poet <jppoet at gmail.com> wrote:

>
> On Mon, Aug 19, 2013 at 4:06 PM, Kenneth Emerson <
> kenneth.emerson at gmail.com> wrote:
>
>> I helped my son set up a new MythTV setup for his new home (yes, he
>> finally moved out, but no, he didn't want to leave the MythTV scene!).
>>  Figured the easiest solution was to use MythBuntu.  The setup was pretty
>> straightforward (as much as any piece of this project can be :) ).  The one
>> piece we cannot solve is the sound.  He has a Logitech 5.1 system with
>> digital coax.  Unfortunately, his MB only has analog output :(.  However,
>> his new 60" Panasonic plasma TV has audio pass-through :) .  When we try to
>> test the audio through the MythTV audio setup (he is running current 0.27)
>> we cannot get anything to "pass-through" except 2 channel stereo.  There
>> are other choices that include 5.1 but we get "No digital signal" from the
>> Logitech controller.  Has anyone else tried this or have any ideas beside
>> buying a sound card?
>>
>> -- Ken E.
>>
>
> Common problem, with probably no solution.  The TV itself only has two
> speakers, so it reports two channels as the maximum it can handle.  HDMI
> will not transmit more audio channels than the device it is attached to can
> handle...  At least that was the situation when I looked into a similar
> problem a couple of years ago.
>
> John
>

Sure there's a solution. If nothing else you could hack the EDID and tell
the kernel to override what's detected from the screen. May not be easy,
but many things are possible in Linux if you're determined enough.

Karl
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