install timidity on linux

The goal of that project is to install timidity+ on a linux dedicated server through SSH so it can be able to convert some .KAR or .MIDI files into .MP3 with a command line. I guess the user needs also to add soundFont so the conversion can be done. A simple 1 line PHP script to convert a MIDI to KAR should be provided. Finally I need a simple doc that describes me the process of doing that task so I am able to deploy it to another server.