PJSIP under ubuntu questions Unable to find default audio device(PJMEDIA_EAUD_NODEFDEV) [stat

Executive ./pjsua-i686-pc-linux-gnu
- id sip: 100@49.140.166.71 - registrar sip: 49.140.166.71 - realm = * - username 100 - password 100 - local -port 5076 - null-audio
can operate normally registered calls, and so failed to establish sound transmission when.
execution ./pjsua-i686-pc-linux-gnu
- id sip: 100@49.140.166.71 - registrar sip: 49.140.166.71 - realm = * - username 100 - password 100 - local -port 5076
call display: pjsua_media.c Error retrieving default audio device parameters: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status = 420006]
We encountered similar problems do? Seeking help Thank
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fix the problem?
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I have encountered this problem. Who knows how it please tell me what 23909475@163.com

Thx
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What would you solve the problem? Seek solutions!
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plug in your headphones to try, to voice headset
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Hello, I have encountered such problems, seek solutions! penglin913@yahoo.cn grateful! ! !
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talkback microphone should be missing it.
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Their first top down!
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Solution :: New Terminal, install libasound.so.2, which sound card driver related.
# sudo get-apt install libasound-dev
in the library or other software installation process, you may need a lot of dependent files in Ubuntu via sudo get-apt install XXX to install; via sudo get-apt remove XXX to unload, It is more commonly used two commands.
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Thank you for your support knot paste it solved now tell everyone I'm sorry forgot Austrian
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how to get, and I have a sound card driver or not ah!
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plus QQ: 2252494672