jack-rack software package provides LADSPA effects rack for JACK, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install jack-rack
jack-rack is installed in your system.
Make ensure the jack-rack package were installed using the commands given below,
$ sudo dpkg-query -l | grep jack-rack *
You will get with jack-rack package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Sound |
| Package | jack-rack |
| Version | 1.4.8~rc1-1+b1 [kfreebsd-amd64 |
| Description | LADSPA effects rack for JACK |
| Sub Section | Sound |