Can't find audio device on Raspberry Pi

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Hi

First of all hello to everyone its the firs time I talk to this mailing 
list.

Please can you give me any hint on how to use Alsa instead of portaudio 
in raspberry pi?, in which  release ? 2.1 or 2.x Dev or Both.

Also on echo cancellation how it can be enabled?I thought by editing 
asterisk config was enought, is that true ?*
*

*sudo gedit /etc/asterisk/sip.conf*


echocancel=yes
echocancelwhenbridged=yes


Thank you very much

El 05/01/14 21:27, Sa?l Ibarra Corretg? ha escrit:
> On Jan 3, 2014, at 4:26 PM, Swinney C. wrote:
>
>> Hi All,
>>   
>> Is anyone aware of a way to get PJSIP to work on the Raspberry Pi so that it might just use the 3.5mm audio out? We have no need to take a mic input and so just are looking to have PJSIP as a dumb client accepting an inbound call and outputting the incoming audio stream via the 3.5 mm audio socket. At this point in time we didn?t want to add a USB (or other) sound device, however, from what I am reading below, even a USB sound device isn?t working that well.
>>   
>> Has anyone had ay greater success with the Raspberry Pi? If so, what hardware are you using?
>>   
> Hi,
>
> I did get both the audio jack and a USB device working. Compile PJSIP with ALSA backend instead of PortAudio, and make sure the sample rate is 16KHz. FOr me G722 and PCMA/PCMU codecs worked fine.
>
> Also, update your Raspberry Pi firmware to the latest available, at some point in late october they made a fix for ALSA which made the sound quality noticeably better.
>
>
> Good luck!
>
> --
> Sa?l Ibarra Corretg?
> AG Projects
>
>
>
>
> _______________________________________________
> Visit our blog: http://blog.pjsip.org
>
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