hexter software package provides Yamaha DX7 modeling DSSI plugin, 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 hexter
hexter is installed in your system.
Make ensure the hexter package were installed using the commands given below,
$ sudo dpkg-query -l | grep hexter *
You will get with hexter package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Sound |
| Package | hexter |
| Version | 0.6.2-3+b2 [kfreebsd-amd64], 0 |
| Description | Yamaha DX7 modeling DSSI plugin |
| Sub Section | Sound |