Asterisks locks alsa device if chan_alsa is loaded












0















I am implementing an extension 900 which routes the audio to alsa device. I am also using mpd which plays music through alsa.



Asterisk 15, Openwrt 18.06



mpd.conf



>> cat /etc/mpd.conf 

log_file "syslog"



bind_to_address "127.0.0.1"

bind_to_address "192.168.1.18"



input {

    plugin          "curl"

}



audio_output {

    type            "alsa"

    name            "sun4icodec"

    device          "hw:0,0"

    mixer_control   "Power Amplifier"

}


Here is the section of extensions.conf related to the extension



;SIP 900

exten => 900,1,NoOp(Testing calls to speakers. Dialing ${EXTEN} from ${CALLERID})

same => n,System(kill -9 `pgrep mpg123`)

same => n,System(amixer set 'Power Amplifier' 80%)

same => n,System(/usr/bin/aplay /var/lib/myapp/sounds/tone3.wav &)

same => n,System(sleep(4))

same => n,NoOp(Testing calls to speakers. Dialing ${EXTEN} from ${CALLERID})

same => n,Dial(CONSOLE/ALSA)

same => n,Hangup()

same => n,System(sleep(1))

same => n,System(amixer set 'Power Amplifier' 80%;)

same => n,System(sleep(4))


When chan_alsa is loaded it locks the alsa device and when something is played on mpd I get the following error



aplay: main:722: audio open error: Resource busy


I came across this on a website but I am not sure how to implement this. Can please guide me how to solve this… twiddle software and/or hardware mixing




output_device = Indicates the name of the ALSA
device to use for playing sound, i.e. for listening. A device name
specified here is passed, unchanged, to the ALSA sound layer, so any
ALSA device name should work. Warning : Asterisk may lock the ALSA
device specified here for the entire duration the Asterisk process is
running. You may have to twiddle software and/or hardware mixing
settings to keep Asterisk from hogging your output device.







embedded alsa openwrt asterisk alsamixer






share



























    0















    I am implementing an extension 900 which routes the audio to alsa device. I am also using mpd which plays music through alsa.



    Asterisk 15, Openwrt 18.06



    mpd.conf



    >> cat /etc/mpd.conf 
    
log_file "syslog"
    

    
bind_to_address "127.0.0.1"
    
bind_to_address "192.168.1.18"
    

    
input {
    
    plugin          "curl"
    
}
    

    
audio_output {
    
    type            "alsa"
    
    name            "sun4icodec"
    
    device          "hw:0,0"
    
    mixer_control   "Power Amplifier"
    
}


    Here is the section of extensions.conf related to the extension



    ;SIP 900
    
exten => 900,1,NoOp(Testing calls to speakers. Dialing ${EXTEN} from ${CALLERID})
    
same => n,System(kill -9 `pgrep mpg123`)
    
same => n,System(amixer set 'Power Amplifier' 80%)
    
same => n,System(/usr/bin/aplay /var/lib/myapp/sounds/tone3.wav &)
    
same => n,System(sleep(4))
    
same => n,NoOp(Testing calls to speakers. Dialing ${EXTEN} from ${CALLERID})
    
same => n,Dial(CONSOLE/ALSA)
    
same => n,Hangup()
    
same => n,System(sleep(1))
    
same => n,System(amixer set 'Power Amplifier' 80%;)
    
same => n,System(sleep(4))


    When chan_alsa is loaded it locks the alsa device and when something is played on mpd I get the following error



    aplay: main:722: audio open error: Resource busy


    I came across this on a website but I am not sure how to implement this. Can please guide me how to solve this… twiddle software and/or hardware mixing




    output_device = Indicates the name of the ALSA
    device to use for playing sound, i.e. for listening. A device name
    specified here is passed, unchanged, to the ALSA sound layer, so any
    ALSA device name should work. Warning : Asterisk may lock the ALSA
    device specified here for the entire duration the Asterisk process is
    running. You may have to twiddle software and/or hardware mixing
    settings to keep Asterisk from hogging your output device.







    embedded alsa openwrt asterisk alsamixer






    share

























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      I am implementing an extension 900 which routes the audio to alsa device. I am also using mpd which plays music through alsa.



      Asterisk 15, Openwrt 18.06



      mpd.conf



      >> cat /etc/mpd.conf 
      
log_file "syslog"
      

      
bind_to_address "127.0.0.1"
      
bind_to_address "192.168.1.18"
      

      
input {
      
    plugin          "curl"
      
}
      

      
audio_output {
      
    type            "alsa"
      
    name            "sun4icodec"
      
    device          "hw:0,0"
      
    mixer_control   "Power Amplifier"
      
}


      Here is the section of extensions.conf related to the extension



      ;SIP 900
      
exten => 900,1,NoOp(Testing calls to speakers. Dialing ${EXTEN} from ${CALLERID})
      
same => n,System(kill -9 `pgrep mpg123`)
      
same => n,System(amixer set 'Power Amplifier' 80%)
      
same => n,System(/usr/bin/aplay /var/lib/myapp/sounds/tone3.wav &)
      
same => n,System(sleep(4))
      
same => n,NoOp(Testing calls to speakers. Dialing ${EXTEN} from ${CALLERID})
      
same => n,Dial(CONSOLE/ALSA)
      
same => n,Hangup()
      
same => n,System(sleep(1))
      
same => n,System(amixer set 'Power Amplifier' 80%;)
      
same => n,System(sleep(4))


      When chan_alsa is loaded it locks the alsa device and when something is played on mpd I get the following error



      aplay: main:722: audio open error: Resource busy


      I came across this on a website but I am not sure how to implement this. Can please guide me how to solve this… twiddle software and/or hardware mixing




      output_device = Indicates the name of the ALSA
      device to use for playing sound, i.e. for listening. A device name
      specified here is passed, unchanged, to the ALSA sound layer, so any
      ALSA device name should work. Warning : Asterisk may lock the ALSA
      device specified here for the entire duration the Asterisk process is
      running. You may have to twiddle software and/or hardware mixing
      settings to keep Asterisk from hogging your output device.







      embedded alsa openwrt asterisk alsamixer






      share














      I am implementing an extension 900 which routes the audio to alsa device. I am also using mpd which plays music through alsa.



      Asterisk 15, Openwrt 18.06



      mpd.conf



      >> cat /etc/mpd.conf 
      
log_file "syslog"
      

      
bind_to_address "127.0.0.1"
      
bind_to_address "192.168.1.18"
      

      
input {
      
    plugin          "curl"
      
}
      

      
audio_output {
      
    type            "alsa"
      
    name            "sun4icodec"
      
    device          "hw:0,0"
      
    mixer_control   "Power Amplifier"
      
}


      Here is the section of extensions.conf related to the extension



      ;SIP 900
      
exten => 900,1,NoOp(Testing calls to speakers. Dialing ${EXTEN} from ${CALLERID})
      
same => n,System(kill -9 `pgrep mpg123`)
      
same => n,System(amixer set 'Power Amplifier' 80%)
      
same => n,System(/usr/bin/aplay /var/lib/myapp/sounds/tone3.wav &)
      
same => n,System(sleep(4))
      
same => n,NoOp(Testing calls to speakers. Dialing ${EXTEN} from ${CALLERID})
      
same => n,Dial(CONSOLE/ALSA)
      
same => n,Hangup()
      
same => n,System(sleep(1))
      
same => n,System(amixer set 'Power Amplifier' 80%;)
      
same => n,System(sleep(4))


      When chan_alsa is loaded it locks the alsa device and when something is played on mpd I get the following error



      aplay: main:722: audio open error: Resource busy


      I came across this on a website but I am not sure how to implement this. Can please guide me how to solve this… twiddle software and/or hardware mixing




      output_device = Indicates the name of the ALSA
      device to use for playing sound, i.e. for listening. A device name
      specified here is passed, unchanged, to the ALSA sound layer, so any
      ALSA device name should work. Warning : Asterisk may lock the ALSA
      device specified here for the entire duration the Asterisk process is
      running. You may have to twiddle software and/or hardware mixing
      settings to keep Asterisk from hogging your output device.







      embedded alsa openwrt asterisk alsamixer




      embedded alsa openwrt asterisk alsamixer





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      dmSherazidmSherazi

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