Re: snd-emu10k1/audigy understand mixer controls and ac3 passthru problems

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Am Freitag, 2. Februar 2007 18:57 schrieb Peter Zubaj:
> Hi,
>
> On Fri, 2007-02-02 at 16:28 +0100, Markus Schulz wrote:
> > At first, ac3 passthru don't work _without_ ld10k1 and init_audigy
> > script. The ICE958 Optical RAW Switch goes on during playing and
> > all currently played pcm streams are off, but my receiver gets no
> > ac3 signal.
> > After starting ld10k1 and loading the initials with init_audigy
> > script everything works fine.
>
> init_audigy initialize dsp in same way as it is initialized in alsa
> driver for audigy 1. Some Audigy cards need swapped channels for ac3
> some not.

Why there are more controls after init_audigy than before.
Perhaps cause of /etc/default/ld10k1 settings? (declares some initial 
values for init_audigy script)

For example: EXTOUT_IEC958=1 -> AC3 Passthru is working after ld10k1 
startup+init_audigy?

What did you mean with swapped channels? How can i influence this with 
original driver?

> > Next i have some problem to understand the mixer controls.
> > At first there is no Mute-Control for: (independent of ld10k1
> > loaded or not) Master, PCM, PCM-*, Front, Surround, ...
> > This is a real pity.
>
> For mute control you can look in
> https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2137
> there is patch, it is old, but probably will work. It is tested only
> on my Audigy 1.

ok, thanks. i will take a look. I think this should be also possible 
with some ld10k1 patch files? With my sblive 5.1 before, i had some of 
these "XXX-Switch" patch-objects in standard ld10k1 setup (init_live).

> > Furthermore it makes no sense to me why there are all surround
> > controls are twice.
> > I have the following:
> > - PCM
> > - PCM Center
> > - PCM Front
> > - PCM Surround
> > - PCM LFE
> > - Front
> > - Center
> > - Surround
> > - LFE
>
> PCM Center, PCM Front, PCM Surround, PCM LFE are for 5.1 playback
> (surround51 device)
>
> Front, Center, Surround, LFE controls upmixing of all stereo sources
> to 5.1 (PCM + analog outputs).

ok. Upmixing means the internal 5.1 prologic decoder? Is there any way 
to use it with alsa devices?

-- 
Markus Schulz

P.S.
are you pzad from alsa-BTS?

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