/usr/share/doc/libasound2-plugins/README-jack is in libasound2-plugins 1.1.1-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | JACK <--> ALSA PCM plugin
=========================
This plugin converts the ALSA API over JACK (Jack Audio Connection
Kit, http://jackit.sf.net) API. ALSA native applications can work
transparently together with jackd for both playback and capture.
ALSA apps (playback) -> ALSA-lib -> JACK plugin -> JACK deamon
ALSA apps (capture) <- ALSA-lib <- JACK plugin <- JACK daemon
This plugin provides the PCM type "jack". The typical configuration
looks like below:
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:pcapture_2
}
}
Put the above to ~/.asoundrc (or /etc/asound.conf), and use "jack" PCM
with your ALSA apps. For example,
% aplay -Djack foo.wav
The jack plugin can have two config options: playback_ports and
capture_ports. Both are compound type config, including the following
format:
{
channel port-name
channel port-name
...
}
The first argument is the channel number (zero-based) and the second
is the corresponding JACK port name.
The plugin is installed in /usr/lib/alsa-lib directory as default,
which is the default search path of additional plugins for alsa-lib.
On a 64bit system like x86-64, the proper prefix option (typically,
--prefix=/usr/lib64) must be given to configure script.
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