[mythtv-users] Dual digital audio outputs

[Allen Edwards]

Does anyone know what is wrong with my asound.conf file?  Did I put it in
the wrong place?  I think it should work, or would have worked at
some point in the past at least.

I did a test with an asound.conf file

pcm.!default {
type plug
slave {
pcm "hw:0,1"
format S32_LE
}
}

This file worked under mythbuntu8 so I know it is valid.  But with this
file in asound.conf and ASLA default selected, I still got HDMI audio and
no spdif.  Pretty much seems like my asound.conf file was ignored and Pulse
just did its thing. Without the ability to have an alsa config file live, I
don't see how I can get this to work on two digital outputs.

Things change and stuff that used to work quits working.  I find it
frustrating and without this support group, MythTV would be unusable IMHO.

Allen

On Fri, Nov 2, 2018 at 1:28 PM John Pilkington <johnpilk222 at gmail.com>
wrote:

> On 02/11/18 19:28, Allen Edwards wrote:
> >
> >
> > On Fri, Nov 2, 2018 at 11:15 AM John Pilkington <johnpilk222 at gmail.com
> > <mailto:johnpilk222 at gmail.com>> wrote:
> >
> >     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
> >
> >
> > John, How do you have it set up to do HDMI and builtin audio at the same
> > time?  Is the built in audio digital?  I suspect mine gives HDMI and
> > analog although I have not tried it as that is not what I want.
> >
> > I tried paprefs I will spare you the details but let's just say I would
> > not recommend it.
> >
> > Allen
>
> Pity about that.  My audio devices are the GK208 nvidia HDMI2 device in
> a GT 710 card and the Built-in audio stereo in the 10-year old HP
> core2duo.  lspci shows 01:00.1 and 00:1b.0  The configuration is through
> a kde/plasma widget 'Audio Volume' with a virtual output device in its
> 'Advanced ' tab.  The details seem to have changed since my f27/28
> upgrade and may not translate to *buntu anyway :-(
>
>
>
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