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saa7134 TV Tuner card audio problems

Awesome, I've got sound!

--- hermann pitton <v4l (at) arcor.de> wrote:

> Hi Noel,
> 
> Am Freitag, den 10.03.2006, 16:18 -0800 schrieb Noel
> Smith:
> > Thanks, as soon as I read your post, I realized
> what i
> > think I did.  I think my problem was that I had
> > installed the v4l-dvb from www.linuxtv.org, and I
> > think that's when I got the sound working that one
> > time, but I didn't know exactly what got it
> working
> > right.  Since then I had done and update to the
> system
> > using yum, and I'm guessing that actually brought
> me
> > back a step.  I've now installed v4l-dvb again,
> and
> > now I'm able to modprobe saa7134-oss and in dmesg
> it
> > shows that it's loaded DMA sound and registered
> dsp1
> > and mixer1.  So, I'm a step closer, at least I
> think I
> > am.  I still am not getting audio from the tuner
> card.
> >  When I run MythTV and select watch TV I still
> just
> > get a click from the speakers and then quiet
> noise.
> 
> there is a general problem with mythtv and all v4l1
> only apps and the
> v4l2 saa7134 driver.
> Mythtv uses v4l1 mute calls and such go through the
> v4l1-compat layer to
> talk with the v4l2 saa7134 driver and there is an
> undiscovered bug.
> Because of this, people were using some "v4lctl
> volume mute off" command
> from xawtv-3.9x all the time. We know the bit
> meanwhile that makes
> digital audio always available, which could help on
> this issue, but it
> is set to mute again since many new cards,
> especially cardbus types,
> don't have any analog audio out anymore and to keep
> the digital audio
> always open disables also automute on channel
> switching and they get
> some annoying noise burst all the time then.


I was able to get audio working with MythTV by
installing xawtv and then using the command:
v4lctl volume mute off
then when I opened mythfrontend audio worked great.


> 
> > At this point, I'm not really sure if I need to
> get a
> > better mixer program that can getting the audio
> from
> > one to the other or if I need to find a command
> that
> > works to transer the audio from dsp1 to dsp.  I've
> > tried:
> > sox -t al -r 32000 -b -c 2 /dev/dsp1 -t al
> /dev/dsp
> > 
> > but, when type that and press <enter>, it just
> sits
> > there and seems like it locks up the audio, and I
> end
> > up having to close the konsole window as it seems
> to
> > never finish the command and bring me back to a
> > prompt.  Anyone have any suggestions as to my next
> > step?
> 
> Install mercurial as this happily still should work
> with Fedora kernels.
> The new alsa stuff had several minor issues, quite
> normal when starting
> such major projects, and they are still mirrored in
> the recent Fedora
> kernels. The oss=1 option doesn't work anymore and
> to get saa7134-oss
> and saa7134-alsa you have to enable it in Kbuild.
> Even some few days old
> 2.6.16-rc5-git11 only supports one saa7134 alsa
> device, but mercurial
> has no problems with four.


I've installed mercurial, but I'm new to Linux and I'm
really not sure what all this is for.  I'm assuming
that I'm wrong, but from what I've seen, the only
thing that I know mercurial is used for is to get
things like v4l-dvb.  I'm sure that as time goes on
and I get more comfortable with Linux I'll learn more
about it and have a better idea what some of the
different programs are used for.


Thank you for all your help.  I'd been trying to get
the audio working on this machine for about 2 weeks
and am extremely happy to be done with that part of
it. So, now I'm onto the next step of setting up the
remote control, which hopefully won't be as big a
problem.

Again thanks,
Noel Smith


> 
> Something like this works for me.
> /usr/local/bin/mencoder -v tv:// -tv
>
driver=v4l2:device=/dev/video0:width=640:height=480:chanlist=europe-
>
west:alsa:adevice=hw.1,0:audiorate=32000:amode=1:forceaudio:volume=70:immediatemode=0:norm=PAL
> -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=3600 -vf
> pp=lb -oac mp3lame -lameopts cbr:br=128:mode=0 -o
> test.avi
> 
> And with alsa oss compat enabled this should still
> do as well.
> "sox -c 2 -s -w -r 32000 -t ossdsp /dev/dsp1 -t
> ossdsp -w -r 32000 /dev/dsp"
> 
> Others tested sox already with genuine alsa devices
> too.
> (guess we still might have some SECAM-L audio bug
> too)
> 
> Cheers,
> Hermann
> 
> 
> > 
> > --- hermann pitton <v4l (at) arcor.de> wrote:
> > 
> > > Am Donnerstag, den 09.03.2006, 17:54 -0800
> schrieb
> > > Noel Smith:
> > > > Well, at this point I'm wondering if my best
> bet
> > > is to
> > > > start fresh by completely reinstalling Fedora
> Core
> > > 4. 
> > > 
> > > Don't do.
> > > 
> > > The transient period of still working saa7134
> oss=1
> > > and out factored
> > > saa7134-oss and saa7134-alsa modules is missing.
> > > 
> > > The Fedora guys have simply enough to do always
> and
> > > kicked this out for
> > > now. Either you try to get a recent mercurial
> > > compiled on your stuff or
> > > a recent 2.6.16.x-git.x.
> > > 
> > > It is not much related to Fedora Core 4 at all.
> > > 
> 
> 
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