Linux Audio Developers


Linux Audio Developers


JACK Rack screenshot


JACK Rack is an effects "rack" for the JACK low latency audio API. The rack can be filled with LADSPA effects plugins and can be controlled using the ALSA sequencer. It's phat; it turns your computer into an effects box.




JACK Rack requires JACK, GTK+2 and LADSPA 1.1. In order to save rack configurations, it needs libxml2. It will optionally use GNOME 2, LASH and can also use LRDF XML plugin descriptions (liblrdf relies on raptor.)

It needs a patchbay, for example jack_connect (command line, comes with JACK) or QJackConnect. If you don't have any LADSPA plugins, get some from here. Great guitar effects for LADSPA can be found in the CAPS package.


The current stable release of JACK Rack is 1.4.7.

The files are signed with Adam's GPG key, key ID B94D2E95 ( To verify that the file you've downloaded is intact, download the corresponding signature file and do:

gpg --recv-keys B94D2E95
gpgv jack-rack-1.4.7.tar.bz2.asc jack-rack-1.4.7.tar.bz2

You can get older stable releases and newer development releases from the download area.


Debian packages are available from

Planet CCRMA binary and source RPMs can be found here.


If you'd like to try out the latest development version of JACK Rack, or work on it youself, please see the Sourceforge Git page for JACK Rack for instructions on how to get a copy of the code.

You can also browse the Git tree.


Please consider donating money to the project if you are not able to donate code.
All people involved work in their spare time for it and have not received any funding for it so far.

Donate to Bob Ham

Bob has written most of JACK Rack but is not able to support it for the time being.

Donate to Leslie Polzer

Leslie did maintenance and support until 2006, adding features and fixing bugs.


You can subscribe or write to the development mailing list, jack-rack-devel, from here. There is also a low-volume list, jack-rack-announce, where releases will be announced.

You can also contact the maintainer directly at <>.

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