Why is this ALSA configuration file preventing aplay and arecord from listing PCM devices?












1















In my embedded system I have this configuration file in /etc/asound.conf:



pcm_slave.sl2 {
pcm "hw:0,0"
rate 48000
channels 2
format S16_LE
}

pcm.rate_convert {
type plug
slave sl2
}

pcm.!default rate_convert


I noticed that since this file was placed in the system, aplay -L and arecord -L cannot list the PCM devices anymore. aplay -l and arecord -l are instead working as expected.



If this file is not placed in there, the list is correctly returned. What is this doing exactly? Why is this preventing aplay and arecord from listing PCM devices?










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    1















    In my embedded system I have this configuration file in /etc/asound.conf:



    pcm_slave.sl2 {
    pcm "hw:0,0"
    rate 48000
    channels 2
    format S16_LE
    }

    pcm.rate_convert {
    type plug
    slave sl2
    }

    pcm.!default rate_convert


    I noticed that since this file was placed in the system, aplay -L and arecord -L cannot list the PCM devices anymore. aplay -l and arecord -l are instead working as expected.



    If this file is not placed in there, the list is correctly returned. What is this doing exactly? Why is this preventing aplay and arecord from listing PCM devices?










    share|improve this question



























      1












      1








      1








      In my embedded system I have this configuration file in /etc/asound.conf:



      pcm_slave.sl2 {
      pcm "hw:0,0"
      rate 48000
      channels 2
      format S16_LE
      }

      pcm.rate_convert {
      type plug
      slave sl2
      }

      pcm.!default rate_convert


      I noticed that since this file was placed in the system, aplay -L and arecord -L cannot list the PCM devices anymore. aplay -l and arecord -l are instead working as expected.



      If this file is not placed in there, the list is correctly returned. What is this doing exactly? Why is this preventing aplay and arecord from listing PCM devices?










      share|improve this question
















      In my embedded system I have this configuration file in /etc/asound.conf:



      pcm_slave.sl2 {
      pcm "hw:0,0"
      rate 48000
      channels 2
      format S16_LE
      }

      pcm.rate_convert {
      type plug
      slave sl2
      }

      pcm.!default rate_convert


      I noticed that since this file was placed in the system, aplay -L and arecord -L cannot list the PCM devices anymore. aplay -l and arecord -l are instead working as expected.



      If this file is not placed in there, the list is correctly returned. What is this doing exactly? Why is this preventing aplay and arecord from listing PCM devices?







      linux audio embedded alsa






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 22 '11 at 21:23







      Luca Carlon

















      asked Nov 22 '11 at 20:47









      Luca CarlonLuca Carlon

      184112




      184112






















          1 Answer
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          Make sure the defaults.namehint.showall and defaults.namehint.extended are set to on in the /usr/share/alsa/alsa.conf file.






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            1 Answer
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            Make sure the defaults.namehint.showall and defaults.namehint.extended are set to on in the /usr/share/alsa/alsa.conf file.






            share|improve this answer




























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              Make sure the defaults.namehint.showall and defaults.namehint.extended are set to on in the /usr/share/alsa/alsa.conf file.






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                0












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                0







                Make sure the defaults.namehint.showall and defaults.namehint.extended are set to on in the /usr/share/alsa/alsa.conf file.






                share|improve this answer













                Make sure the defaults.namehint.showall and defaults.namehint.extended are set to on in the /usr/share/alsa/alsa.conf file.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Dec 15 '16 at 5:59









                Vladimir VassilievVladimir Vassiliev

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