[mythtv-users] Simultaneous AC3/DTS passthrough & stereo analog output

Michael T. Dean mtdean at thirdcontact.com
Tue Oct 23 20:09:22 UTC 2007

On 10/23/2007 03:13 PM, Ryan Steffes wrote:
> On 10/23/07, Gary Dawes <gary.dawes at gmail.com> wrote:
>> I'm in a similar boat. I'd like to have analogue to the TV, as now for run
>> of the mill programmes such as the Wifey's soaps etc, and be able to have
>> AC3 piped over digital to the receiver when I'm watching a video or DVD.
>> Like you bob, I have googled extensively. I have also followed the guides on
>> knoppmythwiki and the general myth wiki, which suggest that it is possible,
>> but the examples shown do not work for me. I have a gigabyte MB with a
>> nforce2 chipset.
>> If anybody has got this working, example configs so the various solutions
>> can be compared would be very useful.
> You should be able to accomplish yours with just the built in
> functionality in MythTV, although you may need to move to SVN (Is the
> ability to add a separate audio device for AC3 pass through in the
> release builds yet?).

Yes it's in 0.20.x (including -fixes).  It's:

Passthrough output device
Audio output device to use for AC3 and DTS passthrough. Default is the
same as Audio output device. This value is currently only used with ALSA
sound output.

>   In current SVN, you'd only need to set one
> device for regular sound, such as ALSA:analog (if you use the asoundrc
> from the wiki) and your digital device ALSA:digital for AC3 pass
> through.



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