[mythtv-users] surround 5.1 sound

Ma Begaj derliebegott at gmail.com
Sun Nov 4 10:09:42 UTC 2007


> 2007/11/4, Ismo Tanskanen <ismot at telemail.fi>:
> > On 11/03/2007 10:28 AM, Ismo Tanskanen wrote:
> > >  Is mythfrontend capable to send 5.1 sound out from soundcard's analog
> > >  connectors?
> >
> > Nope. AC-3 and DTS passthrough are the only ways to get digital
> > "surround" sound. (I.e. your receiver may actually be able to detect
> > Pro-Logic encoding (or similar) in the 2-channel stereo, depending on
> > many issues.) See, also, ticket #1104.
> >
> > >  I'm planning to buy cheap 5.1 speaker set to bedroom. They
> > >  don't use digital out, but connect directly to soundcard, which has 5.1
> > >  speaker outputs. SC is soundmax integrated (asus m2npv-mx)
> > >
> > >  Now, I only get sound from front speakers, even if there is 5.1 track. I
> > >  use internal player to play dvd. TV channels also transmit surround
> > >  sound often.
> > >
> > >  In living room I have dolby amplifier and I use AC3 passthrough, what is
> > >  working great. But I don't want buy separate amplifier to bedroom, I
> > >  think some kind of computer 5.1 surround set (creative, logitech etc) is
> > >  working fine for that purpose.
> >
> > You'll need to fake it with a ttable-based channel copy.
> >
> > Mike
> >
> > Can you explain this a bit more.. please.
>
> That is what wrote in my first mail.  You need something like this:
>
> pcm.20to51 {
>    type route
>    slave.pcm surround51
>    slave.channels 6
>    ttable.0.0 1
>    ttable.1.1 1
>    ttable.0.2 1
>    ttable.1.3 1
>    ttable.0.4 0.5
>    ttable.1.4 0.5
>    ttable.0.5 0.5
>    ttable.1.5 0.5
> }
>

You can fino more information here:
http://alsa.opensrc.org/index.php/Playing_stereo_on_surround_sound_setup_%28Howto%29
-- 
Glauben heißt nicht wissen wollen, was wahr ist ... Nietzsche


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