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.