frescobaldi software package provides Qt4 LilyPond sheet music editor, 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 frescobaldi
frescobaldi is installed in your system.
Make ensure the frescobaldi package were installed using the commands given below,
$ sudo dpkg-query -l | grep frescobaldi *
You will get with frescobaldi package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Editors |
| Package | frescobaldi |
| Version | 2.0.5+ds1-1 |
| Description | Qt4 LilyPond sheet music editor |
| Sub Section | Editors |