sfc (SoundFontCombi) is a midi router designed to mix the sounds of your sound devices. Up to 8 sounds can be mixed or split. There are 6 MIDI out ports and 2 MIDI in ports. Up to six different devices can be used to produce combinations of sounds like some synthesizers. The connections with your devices are automated. You can load/save your "mixes" in banks of sounds, and change it via Midi Program Change message or by the user interface.