[mythtv-users] spdif passthrough toggle

[Allen Edwards]

It is actually a little more complicated although I think some of the
new HD Audio chips should be able to do it.  What you want is the
passthrough of the SPDIF untouched by alsa or pulse audio and yet you
want a stereo decode of the data stream for your TV.

I have the same setup and what I did was take an old Technics digital
decoder box and set it to stereo.  Its outputs go to the TV.  I hook
up to the spdif connection on the MB and built a level shifter out of
some resistors and a capacitor to provide the signal to the second
decoder.  The main decoder is 5.1.  These boxes have DTS and show up
on ebay occasionally. One sold recently for $120.

If anyone figures out how to do this with the internal hardware, I am
switching over.

Allen



On Wed, Jan 14, 2009 at 6:29 PM, jansenj <jansenj+myth at gmail.com> wrote:
> I've already got simultaneous PCM to analog and spdif, I just want DTS at
> times.
>
> On Wed, Jan 14, 2009 at 9:05 PM, Richard Shaw <hobbes1069 at gmail.com> wrote:
>>
>> On Wed, Jan 14, 2009 at 7:53 PM, jansenj <jansenj+myth at gmail.com> wrote:
>> > I have spdif passthrough set for surround sound to my amp, but I also
>> > have
>> > the analog hooked up directly to the TV so we don't have to have the amp
>> > turned on.  Every time I want to watch and listen to something over the
>> > TV
>> > speakers I have to go into the settings menu and deselect the
>> > passthrough
>> > settings, then when I want to go back to surround sound mode, I have to
>> > go
>> > back into the settings.
>> >
>> > I've thought about dedicating a button on the remote to toggle between
>> > two
>> > different myth config files and restarting myth frontend.  Does anyone
>> > have
>> > any better ideas that would make for a higher WAF than having to go into
>> > the
>> > audio settings everytime I want to switch back and forth?
>>
>> The ideal situation would be not to have to, but to have simultaneous
>> analog and digital output. I've seen the occasional email on the list
>> about some who have managed to get that but it seems very hardware
>> dependent.
>>
>> Actually I've been learning a bit about pulseaudio and it actually
>> shouldn't be that difficult to get simultaneous output for analog and
>> digital for PCM audio, but AC3/DTS is another story.
>>
>> Richard
>> _______________________________________________
>> mythtv-users mailing list
>> mythtv-users at mythtv.org
>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>