Upto: Table of Contents of full book "Programming and Using Linux Sound"


FluidSynth is an application for playing MIDI files and a library for MIDI applications.



fluidsynth is a command line MIDI player. It runs under ALSA with a command line

fluidsynth -a alsa -l <soundfont> <files...>

qsynth is a GUI interface to fluidsynth.

Play MIDI files

The FluidSynth API consists of

A typical program to play a sequence of MIDI files using ALSA follows. It creates the various objects, sets the audio player to use ALSA and then adds each soundfont and MIDI file to the player. The call to fluid_player_play then plays each MIDI file in turn:

#include <fluidsynth.h>
#include <fluid_midi.h>

int main(int argc, char** argv)
    int i;
    fluid_settings_t* settings;
    fluid_synth_t* synth;
    fluid_player_t* player;
    fluid_audio_driver_t* adriver;

    settings = new_fluid_settings();
    fluid_settings_setstr(settings, "audio.driver", "alsa");
    synth = new_fluid_synth(settings);
    player = new_fluid_player(synth);

    adriver = new_fluid_audio_driver(settings, synth);
    /* process command line arguments */
    for (i = 1; i < argc; i++) {
        if (fluid_is_soundfont(argv[i])) {
	    fluid_synth_sfload(synth, argv[1], 1);
        } else {
            fluid_player_add(player, argv[i]);
    /* play the midi files, if any */
    /* wait for playback termination */
    /* cleanup */
    return 0;



pyFluidSynth is a Python binding to FluidSynth.

Copyright © Jan Newmarch, jan@newmarch.name
Creative Commons License
"Programming and Using Linux Sound - in depth" by Jan Newmarch is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .
Based on a work at https://jan.newmarch.name/LinuxSound/ .

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