Slackware 12.2 -> jack:
Name: jack
Version: 0.116.2
Arch: i686
Rev: 1
Size (compressed): 352 K
Size (uncompressed): 1620 K
Required Packages: alsa-lib
JACK is a low-latency audio server, written for POSIX conformant operating systems such as GNU/Linux and Apple's OS X. It can connect a number of different applications to an audio device, as well as allowing them to share audio between themselves. Its clients can run in their own processes (ie. as normal applications), or can they can run within the JACK server (ie. as a "plugin"). Homepage: http://jackaudio.org/
Download jack-0.116.2