libasound2-plugin-equal software package provides equalizer plugin for ALSA, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libasound2-plugin-equal
libasound2-plugin-equal is installed in your system.
Make ensure the libasound2-plugin-equal package were installed using the commands given below,
$ sudo dpkg-query -l | grep libasound2-plugin-equal *
You will get with libasound2-plugin-equal package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Libraries |
| Package | libasound2-plugin-equal |
| Version | 0.6-2 |
| Description | equalizer plugin for ALSA |
| Sub Section | libs |