Select a Virtual device

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Hi list,

I've modified the "asound.conf" file to adjust some things I need.

In particular, I want to send audio from one application to another,
using the file plugin from alsa.

in the configuration file-->cat asound.conf...

pcm.audioplayer{
    type file
    slave null
    infile /home/carlos/audiofile.raw
}
pcm.audiowriter
{
    type file
    slave null
    file /home/carlos/audiofile.raw
}
ctl.audioplayer
{
    type file
    slave null
    infile /home/carlos/audiofile.raw
}
ctl.audiowriter
{
    type file
    slave null
    file /home/carlos/audiofile.raw
}

The problem is that I cant select any of these virtual devices. I
mean, When I try to set "audioplayer" device in the "player"
application, and thus can read from the audiofile.raw, the application
tell me:

"Sepecified audio source "audioplayer" can't be opened,  check name"

...and it tell me that valid devices are:

"default"
"HDA Intel"

just these 2 options are available.

So, how can I select any of the virtual devices I've created?

am I missing something to make the virtual devices appear properly?

thanks in advance

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