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Re: [Linphone-users] Alsa makes no noise

From: Simon Morlat
Subject: Re: [Linphone-users] Alsa makes no noise
Date: Tue, 20 Sep 2005 17:16:46 +0200
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Does it work when linphone uses the oss device /dev/dsp, with the alsa-pcm-oss 
module loaded ?
Someone send me a fix around the audio processing in linphone; it will be in 
next pre3 release, it is worth that you try it.


Le Mercredi 14 Septembre 2005 19:02, Marcel Karras a écrit :
> Hello,
> On Wed, 14 Sep 2005 14:07:01 +0200
> Simon Morlat <address@hidden> wrote:
> > 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 ?
> Yes, it will. But any other frequency greater than 8000 Hz will produce
> xruns. 8000 Hz works perfect for simultaneous recording and playing.
> > Could you try with another soundcard ? I still think it's a problem with
> > this alsa driver.
> I regret, no. The DSP is a UCB1400 AC97 controller directly implemented
> into the embedded device. We got this board from a special distributor.
> (Emlix NetDCU6 - see at
> I'm also in contact with the developers at Emlix in order to solve the
> problem but they pointed me to the linphone developers. (as the Alsa
> people did before) You might be right that there's a driver problem but
> I'm not that familiar with the topic in order to find the problem inside
> the driver code.
> Regards
> - Marcel Karras

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