[Ekiga-list] Sound problems

[yannick]

Hi,

Le lundi 18 septembre 2006 à 14:36 +1000, Linda Marsh a écrit :
> Now that I understand that I'm supposed to be using my microphone the
> arecord |aplay works fine, my voice is very clear. 
> 
> I have been playing with the jitter buffer settings whilst on a
> sip:500 at ekiga.net call. Setting it to 50 seems to give the worst
> results. Setting it to about 500 is clearer but I still think people
> would have trouble understanding me talk. Increasing it beyond this had
> no further effect.
> 
> I don't have a camera so I have disabled video. This has had no effect.
> 
> 
> My ALSA Driver version is 1.0.9rc2

Hum... Since this version ALSA uses the DMIX plugin as default. This
software provides for direct mixing of multiple audio streams. This
maybe the reason of your troubles.

> My Distribution is Fedora Core 4
> My Sound card Intel 8280 ICH4 

Seems, this card can't do hardware channel mixing, DMIX is used.
> 
> Any more ideas about what I could try?

This is just a test process, not for everyday use as it will lock your
sound card each time a program use it. And after it you'll have to
reverse the changes you've made.

First disable any program using your sound card. (meaning : if you are
using KDE, go to control panel-> sound system and disable the sound
system, using gnome, go to System -> preferences -> Sounds and disable
ESD and the system sounds). Be sur no other programs use your sound
card ; Those 2 commands (respectively for OSS and ALSA) may help to
track those programs :
$ sudo lsof /dev/dsp
$ sudo lsof /dev/snd/*
(they require your root password, but will just return a list of programs using your sound car if any)
This can include any audio playback (mp3, ogg ...) video players or
sometimes volume control applet...

Once your system is clean, not using your sound card. Configure Ekiga
like this :

Go to the menu Edition -> Preferences -> Devices -> Audio Devices
- Select "ALSA" as the audio plugin
- Select "Your_sound_card_name" as output (something like intel xxxx,
NOT Default) 
- Select "Your_sound_card_name" as input


Then go to the menu Edition -> Preferences -> General -> Sound Events
- Select "Your_sound_card_name" as alternate device output

Now try a call to 500 at ekiga.net. If Ekiga complains about not able to
open audio device, it should remains at least one program using your
sound card. If Ekiga do not complain, your now using your sound card
without DMIX, if everything works OK, then i guess the problem is DMIX
and we can go to configure ALSA to hopefully works properly. If you got
the same result as before this process, then I guess the problem in not
DMIX and I need to think more about it ;).

Regards,
Yannick


> 
> On Sun, 2006-09-17 at 15:14 +0200, Damien Sandras wrote:
> > Le dimanche 17 septembre 2006 à 08:41 +0200, yannick a écrit :
> > > Hi,
> > > 
> > > Le dimanche 17 septembre 2006 à 15:28 +1000, Linda Marsh a écrit :
> > > > Can you tell me how to reverse what I have done with this arecord
> > > > command? 
> > > 
> > > Quote from 
> > > $ man arecord
> > > "arecord, aplay - command-line sound recorder and player for ALSA sound‐
> > > card driver"
> > > 
> > > This as nothing to do with Ekiga, those programs (aplay and arecord) are
> > > part of ALSA (the system wich provide drivers for sound-cards shipped
> > > with the linux kernel). See http://www.alsa-project.org/
> > > 
> > > I guess Damien ask you to test this command to see if your ALSA
> > > installation can support ekiga's requirement from ALSA. Seems your
> > > driver fails to complete the job, meaning your ALSA installation (or
> > > worst, your sound-card...) can't work with ekiga. 
> > > 
> > > What is your ALSA version ?
> > > Try this in a shell :
> > > $ cat /proc/asound/version
> > > 
> > > What is your distro ?
> > > 
> > > What is your sound card ?
> > > 
> > 
> > To summarize what Yannick said, most probably your sound hardware setup
> > is messed up. Suggestion: change your distribution and install one that
> > comes with tested software.
> > -- 
> >  _      Damien Sandras
> > (o-     
> > //\     Ekiga Softphone: http://www.ekiga.org/
> > v_/_    FOSDEM 2006    : http://www.fosdem.org/
> >         SIP Phone      : sip:dsandras at ekiga.net
> >                          sip:600000 at ekiga.net
> > 
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