[linux-audio-user] alsa clients plugged into jackd with jackplug

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Subject: [linux-audio-user] alsa clients plugged into jackd with jackplug
From: Esben Stien (b0ef_AT_esben-stien.name)
Date: Mon Dec 27 2004 - 00:23:28 EET

I don't think I understand this jackplug concept.

I'm trying to get an alsa client, such as aplay to play through jackd.

I've setup jackplug in /etc/asound.conf

pcm.jackplug
{
  type plug
  slave
  {
    pcm "jack"
  }
}

pcm.jack
{
  type jack
  playback_ports
  {
    0 alsa_pcm:playback_1
    1 alsa_pcm:playback_2
  }
  capture_ports
  {
    0 alsa_pcm:capture_1
    1 alsa_pcm:capture_2
  }
}

I then tell aplay to use:

#aplay -d jackplug foobar.wav

But aplay plays the file even if jackd is not started; why?. Isn't
jackplug supposed to show up in my jack connections when aplay is
playing?

I seem to be missing something vital.

Is there some way to make a "fake audio device", like hw:3,0 that alsa
applications can connect to so that I can get the audio out and then
send it through jack, process it and then send it to the real audio
device? 

-- 
Esben Stien is b0ef_AT_esben-stien.name
http://www.esben-stien.name
irc://irc.esben-stien.name/%23contact
[sip|iax]:b0ef_AT_esben-stien.name

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