FluidSynth

FluidSynth is a real-time software synthesizer based on the SoundFont 2 specifications. FluidSynth can read MIDI events from a MIDI input device and render them to an audio device using SoundFont instruments. SoundFont files are composed of digital audio "samples" and additional instrument parameters. These files can be created or downloaded off the Internet. FluidSynth also has support for controlling effects in real time and can play MIDI files.