[mythtv-users] All TV plays back as stereo and not surround over HDMI

Nick Rout nick.rout at gmail.com
Mon Jan 14 00:06:55 UTC 2013


On Mon, Jan 14, 2013 at 1:01 PM, Brendon Costa <brendon.j.costa at gmail.com>wrote:

> Hi all,
>
> I have a Myth setup using a combined frontend/backend setup using
> mythbuntu 12.04.1 (running mythtv 0.25 I think)
>
> I have had it setup for maybe 6 months now using stereo + video over HDMI
> to my receiver. I recently however setup surround speakers for 5.1 and am
> trying to get surround to work.
>
> I have read all sorts of instructions about this and it is a confusing
> mess of what does/doesn't work with conflicting instructions in all sorts
> of places. I am able to get surround channels working in ALSA using the
> speaker-test:
> speaker-test -Dhdmi:CARD=NVidia,DEV=0 -c6
>
> when i use the frontend setup, I can set to 5.1 and the speaker tests work
> (well in both the speaker-test and frontend test the channel mapping is
> incorrect, but I think I can fix that later). The issue is that all
> recorded TV seems to always playback in stereo only.
>
> I read a few instructions, some say use the 5.1 config in the the mythtv
> frontend setup and other instructions say set to stereo and it will do
> passthrough of the DTS etc to the reciever. Neither gave me surround
> (unless I specified to up-convert the stereo to 5.1, which is not what I
> want). If i have the option I would like to enable passthrough.
>
> Can anyone help with this problem?
>
> I wonder if the recordings are only recording stereo somehow?
>
> I can provide any debug information fairly easily that is requested.
>
> Thanks for any help in advance,
> Brendon.
>


use mediainfo on some of your recorded files to establish what audio they
contain.
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