gpe-mixer software package provides audio mixer frontend for GPE, 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 gpe-mixer
gpe-mixer is installed in your system.
Make ensure the gpe-mixer package were installed using the commands given below,
$ sudo dpkg-query -l | grep gpe-mixer *
You will get with gpe-mixer package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Sound |
| Package | gpe-mixer |
| Version | 0.50-1 |
| Description | audio mixer frontend for GPE |
| Sub Section | Sound |