how to configure .asoundrc to make arecord use a default device

how to configure .asoundrc to make arecord use a default device

[Jelle de Jong]

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Hello everybody,

I am having some issues making arecord use the default device for 
recording. Could somebody help me get a working .asoundrc configuration?

I attached all information in the attachment and also made temporary 
hyperlink: http://debian.pastebin.com/m52601230

It works with:
arecord -v -f S16_LE -r 44100 -D audiodevice0 ~/record0.wav
but it does not work with:
arecord -v -f S16_LE -r 44100 ~/record0.wav

background:
http://mailman.alsa-project.org/pipermail/alsa-devel/2008-November/012366.html

Thanks in advance,

Best regards,

Jelle de Jong

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------------------------------------------------------------------------

# ls -hal /dev/snd/
total 0
drwxr-xr-x  2 root root       320 2009-07-29 10:21 .
drwxr-xr-x 14 root root      4.9K 2009-07-29 12:26 ..
crw-rw----  1 root user0 116,   0 2009-07-29 10:21 controlC0
crw-rw----  1 root user1 116,  32 2009-07-29 10:21 controlC1
crw-rw----  1 root user2 116,  64 2009-07-29 10:21 controlC2
crw-rw----  1 root user3 116,  96 2009-07-29 10:21 controlC3
crw-rw----  1 root user0 116,  24 2009-07-29 10:21 pcmC0D0c
crw-rw----  1 root user0 116,  16 2009-07-29 11:26 pcmC0D0p
crw-rw----  1 root user1 116,  56 2009-07-29 10:21 pcmC1D0c
crw-rw----  1 root user1 116,  48 2009-07-29 10:40 pcmC1D0p
crw-rw----  1 root user2 116,  88 2009-07-29 10:21 pcmC2D0c
crw-rw----  1 root user2 116,  80 2009-07-29 12:26 pcmC2D0p
crw-rw----  1 root user3 116, 120 2009-07-29 10:21 pcmC3D0c
crw-rw----  1 root user3 116, 112 2009-07-29 10:37 pcmC3D0p
crw-rw----  1 root audio 116,   1 2009-07-29 10:21 seq
crw-rw----  1 root audio 116,  33 2009-07-29 10:21 timer

------------------------------------------------------------------------

# cat /proc/asound/cards
 0 [audiodevice0   ]: USB-Audio - C-Media USB Audio Device
                      C-Media USB Audio Device    at usb-0000:00:13.0-1, full speed
 1 [audiodevice1   ]: USB-Audio - C-Media USB Audio Device
                      C-Media USB Audio Device    at usb-0000:00:13.0-2, full speed
 2 [audiodevice2   ]: USB-Audio - C-Media USB Audio Device
                      C-Media USB Audio Device    at usb-0000:00:13.3-1, full speed
 3 [audiodevice3   ]: USB-Audio - C-Media USB Audio Device
                      C-Media USB Audio Device    at usb-0000:00:13.3-2, full speed

------------------------------------------------------------------------

# cat /home/user0/.asoundrc
pcm.!default {
   type plug
   slave.pcm dmixer
}
pcm.dmixer {
   type dmix
   ipc_key 2048
   slave.pcm hw:audiodevice0
}
ctl.dmixer {
   type hw
   card audiodevice0
}
pcm.dsp {
    type plug
    slave.pcm dmixer
}
ctl.mixer {
    type hw
    card audiodevice0
}

------------------------------------------------------------------------

su user0

# This is the issue. how can I configure the asoundrc so that arecord
# uses audiodevice0 by default like speaker-test already does for playing.

$ arecord -v -f S16_LE -r 44100 ~/record1.wav
ALSA lib pcm_dmix.c:947:(snd_pcm_dmix_open) The dmix plugin supports only playback stream
arecord: main:608: audio open error: Invalid argument

$ arecord -v -f S16_LE -r 44100 -D hw:audiodevice0 ~/record0.wav
Recording WAVE '/home/user0/record0.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
Hardware PCM card 0 'C-Media USB Audio Device   ' device 0 subdevice 0
Its setup is:
  stream       : CAPTURE
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 1
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 22050
  period_size  : 5513
  period_time  : 125011
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 5513
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 22050
  silence_threshold: 0
  silence_size : 0
  boundary     : 6206523236469964800
  appl_ptr     : 0
  hw_ptr       : 0
^CAborted by signal Interrupt...

$ ls -hal ~/record*.wav
-rw-r----- 1 user0 user0 1.8M 2009-07-29 12:56 /home/user0/record0.wa

------------------------------------------------------------------------

su -c "speaker-test -c 2 & speaker-test -c 2 &" user0

------------------------------------------------------------------------

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Re: how to configure .asoundrc to make arecord use a default device

[stan]

On Wed, 29 Jul 2009 14:46:54 +0200
Jelle de Jong <jelledejong@powercraft.nl> wrote:

> Hello everybody,
> 
> I am having some issues making arecord use the default device for 
> recording. Could somebody help me get a working .asoundrc
> configuration?

> It works with:
> arecord -v -f S16_LE -r 44100 -D audiodevice0 ~/record0.wav
> but it does not work with:
> arecord -v -f S16_LE -r 44100 ~/record0.wav

Make audiodevice0 your default device

http://www.alsa-project.org/main/index.php/Asoundrc#The_default_plugin

Re: how to configure .asoundrc to make arecord use a default device

[Jelle de Jong]

On 29/07/09 17:28, stan wrote:
> On Wed, 29 Jul 2009 14:46:54 +0200
> Jelle de Jong<jelledejong@powercraft.nl>  wrote:
>
>> Hello everybody,
>>
>> I am having some issues making arecord use the default device for
>> recording. Could somebody help me get a working .asoundrc
>> configuration?
>
>> It works with:
>> arecord -v -f S16_LE -r 44100 -D audiodevice0 ~/record0.wav
>> but it does not work with:
>> arecord -v -f S16_LE -r 44100 ~/record0.wav
>
> Make audiodevice0 your default device
>
> http://www.alsa-project.org/main/index.php/Asoundrc#The_default_plugin

Hi Stan thanks for helping out.

In the original mail I attached my asoundrc setup it can also be found 
here: http://debian.pastebin.com/m52601230 and now here below.

pcm.!default {
    type plug
    slave.pcm dmixer
}
pcm.dmixer {
    type dmix
    ipc_key 1024
    slave.pcm hw:audiodevice0
}
ctl.!default {
     type hw
     card audiodevice0
}
ctl.dmixer {
    type hw
    card audiodevice0
}
pcm.dsp {
     type plug
     slave.pcm dmixer
}
ctl.mixer {
     type hw
     card audiodevice0
}

I am no asourdrc specialist and I always have got issues understanding 
the syntax when it comes down to more complicated setups. I know I need 
to make the audiodevice0 the default device. But how can I do this 
without losing my mixing support, how I configure it so it has dmix and 
dsnoop as default devices?

An example how to fix my asoundrc would be really helpful.

Thanks in advance,

Jelle

Re: how to configure .asoundrc to make arecord use a default device

[stan]

On Wed, 29 Jul 2009 19:14:46 +0200
Jelle de Jong <jelledejong@powercraft.nl> wrote:


> 
> Hi Stan thanks for helping out.
<snip>
> I am no asourdrc specialist and I always have got issues

Neither am I!  Ditto with the issues.  There are experts around.

> understanding the syntax when it comes down to more complicated
> setups. I know I need to make the audiodevice0 the default device.
> But how can I do this without losing my mixing support, how I
> configure it so it has dmix and dsnoop as default devices?
> 
> An example how to fix my asoundrc would be really helpful.

You're asking the wrong guy!  I just use the page I pointed you to, web
search, and trial and error to get an .asoundrc that works.  I don't
actually use one right now.

I notice that your USB device is actually interpreted as 4 cards.  Are
they each of different functionality?  You could try (as a wild guess):

> pcm.!default {
>     type plug{
>        slave.pcm dmixer
         slave.pcm drecord
      }
> }
> pcm.dmixer {
>     type dmix
>     ipc_key 1024
>     slave.pcm hw:audiodevice0
> }
 pcm.drecord {
     type dsnoop
     ipc_key 1025
     slave.pcm hw:audiodevice0
 }
> ctl.!default {
>      type hw
>      card audiodevice0
> }
> ctl.dmixer {
>     type hw
>     card audiodevice0
> }
> ctl.drecord {
>     type hw
>     card audiodevice0
> }
> pcm.dsp {
>      type plug {
>        slave.pcm dmixer
>        slave.pcm drecord
       }
> }
> ctl.mixer {
>      type hw
>      card audiodevice0
> }

All this is supposition on my part.  Maybe it will give you enough of a
hint in some way to get it working.

Re: how to configure .asoundrc to make arecord use a default device

[Jelle de Jong]

On 29/07/09 19:51, stan wrote:
> On Wed, 29 Jul 2009 19:14:46 +0200
> Jelle de Jong<jelledejong@powercraft.nl>  wrote:
>
>> Hi Stan thanks for helping out.
> <snip>
>> I am no asourdrc specialist and I always have got issues
>
> Neither am I!  Ditto with the issues.  There are experts around.
>
>> understanding the syntax when it comes down to more complicated
>> setups. I know I need to make the audiodevice0 the default device.
>> But how can I do this without losing my mixing support, how I
>> configure it so it has dmix and dsnoop as default devices?
>>
>> An example how to fix my asoundrc would be really helpful.
>
> You're asking the wrong guy!  I just use the page I pointed you to, web
> search, and trial and error to get an .asoundrc that works.  I don't
> actually use one right now.
>
> I notice that your USB device is actually interpreted as 4 cards.  Are
> they each of different functionality?  You could try (as a wild guess):
>
>> pcm.!default {
>>      type plug{
>>         slave.pcm dmixer
>           slave.pcm drecord
>        }
>> }
>> pcm.dmixer {
>>      type dmix
>>      ipc_key 1024
>>      slave.pcm hw:audiodevice0
>> }
>   pcm.drecord {
>       type dsnoop
>       ipc_key 1025
>       slave.pcm hw:audiodevice0
>   }
>> ctl.!default {
>>       type hw
>>       card audiodevice0
>> }
>> ctl.dmixer {
>>      type hw
>>      card audiodevice0
>> }
>> ctl.drecord {
>>      type hw
>>      card audiodevice0
>> }
>> pcm.dsp {
>>       type plug {
>>         slave.pcm dmixer
>>         slave.pcm drecord
>         }
>> }
>> ctl.mixer {
>>       type hw
>>       card audiodevice0
>> }
>
> All this is supposition on my part.  Maybe it will give you enough of a
> hint in some way to get it working.

I don't know how you got it working but i tried several similar setups, 
and I ether get syntax error, working recording with broken playing, or 
working playing with broken recording. :( see:
http://debian.pastebin.com/m37d09000

I really hope somebody can show a cut and paste .asoundrc that I can use 
for testing.

Thanks in advance,

Jelle

Re: how to configure .asoundrc to make arecord use a default device

[stan]

On Wed, 29 Jul 2009 20:29:08 +0200
Jelle de Jong <jelledejong@powercraft.nl> wrote:


> I really hope somebody can show a cut and paste .asoundrc that I can
> use for testing.

Someone sent me this link of pre-configured .asoundrc files.

http://home.roadrunner.com/~infofiles/asoundrc.examples.html

Maybe one of those will work for you.

Re: how to configure .asoundrc to make arecord use a default device

[Jelle de Jong]

On 29/07/09 20:52, stan wrote:
> On Wed, 29 Jul 2009 20:29:08 +0200
> Jelle de Jong<jelledejong@powercraft.nl>  wrote:
>
>
>> I really hope somebody can show a cut and paste .asoundrc that I can
>> use for testing.
>
> Someone sent me this link of pre-configured .asoundrc files.
>
> http://home.roadrunner.com/~infofiles/asoundrc.examples.html
>
> Maybe one of those will work for you.

Thanks for the hint. i saw that page before sometime in the past :-)

The asym plug seems to be what whe want :D I am testing it now.

pcm.!default {
     type asym
     playback.pcm {
         type plug
         slave.pcm "dmixer"
     }
     capture.pcm {
         type plug
         slave.pcm "drecord"
     }
}
pcm.dmixer {
     type dmix
     ipc_key 1024
     slave.pcm hw:audiodevice0
}
pcm.drecord {
     type dsnoop
     ipc_key 2048
     slave.pcm hw:audiodevice0
}
ctl.!default {
     type hw
     card audiodevice0
}

Anybody that sees some missing things here? I needs to work with oss, 
alsa and gstreamer alsasinks.

Best regards,

Jelle