[mythtv-users] Dual digital audio outputs
John Pilkington
johnpilk222 at gmail.com
Fri Nov 2 18:14:35 UTC 2018
On 02/11/18 16:38, Allen Edwards wrote:
> I have tried and failed to get both HDMI and SPDIF outputs working at
> the same time. I can get either one working by using default:pulse and
> switching them with the pulse control panel but it would be nice to have
> them both working without having to get up and go to a terminal when I
> want to listen to a show with the big sound on.
>
> In my old system from 10 years ago I had two SPDIF outputs, one for the
> TV through a converter and one into the surround system. At that time
> my asound.conf file looked like this:
>
> pcm.!default {
> type plug
> slave {
> pcm "hw:0,1"
> format S32_LE
> }
> }
>
>
> I tried to follow "Simultaneous Audio Output to Independent Devices" and
> eliminate the extraneous stuff and came up with this. Note that the TV
> gets sound from HDMI and that works but I do not get sound on the
> surround system.
>
> dad at NewMyth:~$ more /etc/asound.conf
> pcm.!default {
> type plug
> slave {
> pcm "multi_dig"
> }
> }
>
> pcm.multi_dig {
> type multi
> # Define SPDIF slave
> slaves.a {
> pcm "hw:0,1"
> #tried both with and without this next line
> format S32_LE
> }
> # Define HDMI slave
> slaves.b {
> pcm "hw:1,7"
> }
> }
>
> I set Myth setup to asla:default but I only get HDMI audio. If I set
> myth to play device hw:0,1 I get audio out of the surround and if I set
> it up to Nvidia HDMI 7 I get output to the TV.
>
> I tried to look in the Alsa website and read an article on multiple
> cards and all I understood was that things are probably different now
> and nothing that used to work will work any more. Maybe that is the
> problem...
>
> I am using Muthbuntu 16. Anybody have this working on a similar system
> and care to share?
>
> Allen
Well, no, I don't have a similar system, but my fedora kde/plasma setup
has simultaneous audio to HDMI and builtin audio set up as default. My
/etc/asound.conf is effectively empty.
But searching for 'ubuntu simultaneous audio ...' gave a 2018 reference
to paprefs, Pulse Audio Preferences, a graphical utility available via
apt-get. It might do what you want.
John
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