Polyphone is a free software for editing soundfonts in format sf2. These files contain a multitude of audio samples put together and configured so as to form musical instruments that can be used by synthesizers such as fluidsynth and played using a MIDI keyboard.

The goal of Polyphone is to provide:

a simple and efficient interface for creating and editing .sf2 files, available on Windows, Mac OS X and Linux,
tools to facilitate and automate the editing of different parameters, making it possible to handle a large amount of data.

Polyphone is licensed under GNU General Public License. Anyone may thus access the source code, and is welcome to help in the development of the program.