Polyphone is an open-source soundfont editor for creating musical instruments, available for Windows, Mac OS X and Linux.
- editing of sf2, sf3, sfz and sfArk file formats
- compatible with jack and asio audio servers
- built-in synthesizer, controlled by a virtual keyboard or midi signals
- automatic recognition of root keys
- automatic loop of samples
- simultaneous editing of parameters
- specific tools for musical instrument creation
- recorder to keep a trace of what is played in a .wav file
Check this page to find installers for your system.
See the documentation and forum.