[mythtv-users] Analogue 5.1 Surround Sound Out

[James Buckley]

OK, further studying of the problem makes me think that I'm having the
front audio (not the center and sub) cloned over all my outputs. I'm
beginning to think ALSA isn't detecting my sound card as being
surround sound capable (but I DO have volume controls for front,
surround, center, LFE, and side). All outputs seem to be carrying the
same sound, which I think should actually be the sound on 'front'.

I wonder if ALSA incorrectly mapped my channels, or maybe there's a
bug in the driver. I'll try with a USB sound card I have (An Audigy 2
NX), but that comes with it's own problems...

On 03/01/07, James Buckley <xanium4332 at googlemail.com> wrote:
> OK, so I've been messing with the patch for past couple of days
> (managed to make a Gentoo ebuild that applies the patch _cleanly_,
> after all the gentoo patches were applied parts of the audio patch
> didn't apply cleanly, so I fixed them manually and created a new
> patch).
>
> So now I have the option to select between 'Stereo' and '6 Channel' in
> my sound setup menu. OK, so I've got it set to 6 channel obviously,
> but now when I watch a DVD which has 5.1 audio, it seems one of the
> channels is missing.
>
> I get all the sounds except voice?!? Literally, just voice is stripped
> out. I think i'm right in saying voice generally is on the center
> speaker when listening to 5.1 audio, so I'm assuming that that's the
> channel I'm missing.
>
> Anybody have any ideas? I know my description's a bit sketchy, and
> it's probably me just missing something obvious.
>
> Oh, and for anyone who wants the ebuild, I've attached it (sorry about
> the .zip format)
>
> Thanks so far, james
>
> On 02/01/07, James Buckley <xanium4332 at googlemail.com> wrote:
> > Should I be getting the Duplicate Front problem though? (even without
> > the patch).
> >
> > I'll try the patch in a minute, having exams tomorrow is making
> > revision quite a high priority...
> >
> > Thanks so far, James
> >
> > On 02/01/07, MythTV User <mythuser at mydean.com> wrote:
> > > This is what I desire as well. Last night, I was busy getting the ALSA
> > > correctly configured using this link
> > > http://www.mythtv.org/wiki/index.php/Configuring_Digital_Sound
> > >
> > > So far, the regular Front L and R are working, I have not checked the other
> > > channels yet as I ran out of time.
> > >
> > >
> > > -----Original Message-----
> > > From: mythtv-users-bounces at mythtv.org
> > > [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of James Buckley
> > > Sent: Tuesday, January 02, 2007 9:38 AM
> > > To: MythTV Users
> > > Subject: [mythtv-users] Analogue 5.1 Surround Sound Out
> > >
> > > Hello all...
> > >
> > > I was wondering how to enable 5.1 surround sound in myth? Is it as simple as
> > > editing the sound device to 'ALSA:surround51'.
> > >
> > > See me, being a poor man, cannot afford an external digital audio system
> > > (which would allow me to just enable 'AC3 Passthrough' to get surround
> > > sound). Instead I have a 5.1 surround sound speaker system (like the ones
> > > you can get for PCs). I was wondering how to get the
> > > 5.1 audio from DVDs & etc..
> > >
> > > At the moment it just seems to clone a stereo output over all my channels,
> > > and I have no option in alsamixer for setting 'Duplicate Front'.
> > >
> > > Any info would be great.
> > >
> > > Thanks in advance, James
> > >
> > > P.S., my Motherboard's an MSI K8NGM2-FID, with 7.1 and SPDIF audio out. ALSA
> > > uses the 'hda-intel' driver.
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