asmixer software package provides AfterStep audio mixer, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install asmixer
asmixer is installed in your system.
Make ensure the asmixer package were installed using the commands given below,
$ sudo dpkg-query -l | grep asmixer *
You will get with asmixer package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Sound |
| Package | asmixer |
| Version | 0.5-14 |
| Description | AfterStep audio mixer |
| Sub Section | Sound |