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Re: [Linphone-users] Alsa makes no noise

From: Simon Morlat
Subject: Re: [Linphone-users] Alsa makes no noise
Date: Wed, 14 Sep 2005 14:07:01 +0200
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No linphone doesn't work with stereo, as usually microphones are mono only.
Does the  arecord -f S16_LE -r 8000 |aplay -f S16_LE -r 8000 
also works with mono ?

Could you try with another soundcard ? I still think it's a problem with this 
alsa driver.


Le Vendredi 9 Septembre 2005 16:20, Marcel Karras a écrit :
> Hi,
> is linphone capable of playing stereo? In order to get any noise I had to
> set the "channels" variable in "mediastreamer/alsacard.c" manually to the
> value of 2. After this I got a ring and the "Hello, this is Simon
> speaking..." sound. ;) But: The sounds are played with many xruns, too
> quick and discontinuoued.
> By just using one channel there's no sound and the hw_params proc file
> shows the state of being in XRUN. As you can see I really got stuck and
> don't know how to solve this problem. I can play and record simultaneously
> by doing the following:
> arecord -f S16_LE -r 8000 |aplay -f S16_LE -r 8000
> If I try a higher rate than 8000 there'll be xruns. I even changed the
> "unsigned long" period variable of the au1x00.c driver to "int" without
> any effect. The alsa people pointed me to linphone as arecord/aplay works
> with 8000 Hz. Linphone uses 8000 Hz, too. Playing around with the buffers
> in "alsacard.c" makes things sounding different but there're still xruns
> and sounds tingling like 8000 Hz converted to 44100 Hz. (Donald Duck
> voices ;)
> Any further ideas?
> - Marcel

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