gmidimonitor software package provides GTK+ application that shows MIDI events, 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 gmidimonitor
gmidimonitor is installed in your system.
Make ensure the gmidimonitor package were installed using the commands given below,
$ sudo dpkg-query -l | grep gmidimonitor *
You will get with gmidimonitor package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Sound |
| Package | gmidimonitor |
| Version | 3.6+dfsg0-1 |
| Description | GTK+ application that shows MIDI events |
| Sub Section | Sound |