[gentoo-user] Alsa SPDIF+analog at same time

[gentoo-user] Alsa SPDIF+analog at same time

[Alexander Puchmayr]

Hi there!

I'd like to have an audio signal on both the SPDIF and the analog output. I 
know that this is possible, since I had such configuration some weeks ago, but 
due to some circumstance I really can't reproduce it suddenly doesn't work 
anymore.

SPDIF itself works fine when playing AC3 or DTS streams in Mythtv, but there's 
only an analog signal when I play videos that only have MP2/MP3 streams or if 
I play music (mp3,ogg, etc) - there is no signal on SPDIF in this case.

So, how do I get back the non-AC3/DTS-Audiostreams on SPDIF?

Thanks
    Alex

Re: [gentoo-user] Alsa SPDIF+analog at same time

[Iain Buchanan]

On Mon, 2009-11-09 at 17:50 +0100, Alexander Puchmayr wrote:
> Hi there!
> 
> I'd like to have an audio signal on both the SPDIF and the analog output. I 
> know that this is possible, since I had such configuration some weeks ago, but 
> due to some circumstance I really can't reproduce it suddenly doesn't work 
> anymore.

possibly alsa / gnome updates?

> SPDIF itself works fine when playing AC3 or DTS streams in Mythtv, but there's 
> only an analog signal when I play videos that only have MP2/MP3 streams or if 
> I play music (mp3,ogg, etc) - there is no signal on SPDIF in this case.
> 
> So, how do I get back the non-AC3/DTS-Audiostreams on SPDIF?

with mplayer I used to use this command to get spdif output:
mplayer -afm hwac3 blah.avi

also, with the old (2.24?) gnome alsa mixer, I found I had to add the
spdif or IEC device (can't quite remember), and although it was a
slider, it only worked in an on or off fashion.

Not much help for you I know, but I can't run the same mixer anymore to
find out.

HTH,
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

If practice makes perfect, and nobody's perfect, why practice?

Re: [gentoo-user] Alsa SPDIF+analog at same time

[Alexander Puchmayr]

Am Dienstag 10 November 2009 00:34:44 schrieb Iain Buchanan:
> On Mon, 2009-11-09 at 17:50 +0100, Alexander Puchmayr wrote:
> > Hi there!
> >
> > I'd like to have an audio signal on both the SPDIF and the analog output.
> > I know that this is possible, since I had such configuration some weeks
> > ago, but due to some circumstance I really can't reproduce it suddenly
> > doesn't work anymore.
> 
> possibly alsa / gnome updates?
> 

Definitely not, its a dedicated mythtv box and I didn't change software 
configuration for a long time. The box does not have any gnome or kde or the 
like installed.

> > SPDIF itself works fine when playing AC3 or DTS streams in Mythtv, but
> > there's only an analog signal when I play videos that only have MP2/MP3
> > streams or if I play music (mp3,ogg, etc) - there is no signal on SPDIF
> > in this case.
> >
> > So, how do I get back the non-AC3/DTS-Audiostreams on SPDIF?
> 
> with mplayer I used to use this command to get spdif output:
> mplayer -afm hwac3 blah.avi
> 
> also, with the old (2.24?) gnome alsa mixer, I found I had to add the
> spdif or IEC device (can't quite remember), and although it was a
> slider, it only worked in an on or off fashion.
> 
I played around with some IEC settings, no effect.

Greetings, 
    Alex

Re: [gentoo-user] Alsa SPDIF+analog at same time

[David W Noon]

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On Mon, 09 Nov 2009 18:00:01 +0100, Alexander Puchmayr wrote about
[gentoo-user] Alsa SPDIF+analog at same time:

>I'd like to have an audio signal on both the SPDIF and the analog
>output. I know that this is possible, since I had such configuration
>some weeks ago, but due to some circumstance I really can't reproduce
>it suddenly doesn't work anymore.

Have you upgraded your kernel recently?

I found that the SP/DIF output stopped working when I upgraded from
2.6.29 to 2.6.30.  I might downgrade my kernel to check that it was
this that caused the SP/DIF (or TOSLink) output to stop.
-- 
Regards,

Dave  [RLU #314465]
======================================================================
dwnoon@ntlworld.com (David W Noon)
======================================================================

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Re: [gentoo-user] Alsa SPDIF+analog at same time

[Iain Buchanan]

On Tue, 2009-11-10 at 08:11 +0100, Alexander Puchmayr wrote:

> I played around with some IEC settings, no effect.

sorry, that's all I've got :(

-- 
Iain Buchanan <iaindb at netspace dot net dot au>

There is no sin but ignorance.
		-- Christopher Marlowe

Re: [gentoo-user] Alsa SPDIF+analog at same time

[Alexander Puchmayr]

Am Dienstag 10 November 2009 21:39:03 schrieb David W Noon:

> Have you upgraded your kernel recently?
> 
> I found that the SP/DIF output stopped working when I upgraded from
> 2.6.29 to 2.6.30.  I might downgrade my kernel to check that it was
> this that caused the SP/DIF (or TOSLink) output to stop.
> 
No, its still 2.6.27-gentoo-r8 built in June this year.

Greetings
   Alex