guitarix-lv2 software package provides Guitarix - LV2 plugins, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install guitarix-lv2
guitarix-lv2 is installed in your system.
Make ensure the guitarix-lv2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep guitarix-lv2 *
You will get with guitarix-lv2 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Sound |
| Package | guitarix-lv2 |
| Version | 0.35.2-1 |
| Description | Guitarix - LV2 plugins |
| Sub Section | Sound |