• On Mac OS X (10.6+ package), FluidSynth is automatically loaded when using FMOD as the audio plugin.

• On Linux, FluidSynth uses one of its own audio drivers to play music (“pulseaudio” by default). The default driver can be configured. 1.9.10

• FluidSynth is not available on Windows at the moment.

To verify that the plugin is in use, look for the “Audio configuration” printed in doomsday.out. It should contain a mention of FluidSynth being used as a Music interface. The command-line option

1. imusic fluidsynth

forces the engine to use FluidSynth for music playback.

You must set the cvar music-soundfont to the full path of an SF2 soundfont file. The first time you set the cvar, it takes until the start of the next song for the SF2 to be taken into use, i.e., it won't happen immediately.

If a MUS/MIDI song is already playing with an SF2 soundfont, changing the value of music-soundfont will immediately have an effect and the MIDI music continues to play using the new soundfont.

If a MUS/MIDI song is playing with an SF2 soundfont and you clear music-soundfont or change it to a .DLS file, the current music will stop and when the next song starts, it will play through another music interface (if available; e.g., FMOD with .DLS).

The FluidSynth plugin supports Mac OS X and Linux, but not Windows (needs GLib 2 library).

A streaming sample is similar to standard samples (sfxsample_t) with the exception that instead of having a direct pointer to the sample data, it has a callback function through which the sample data is returned on demand. The existing audio drivers need to be modified to support streaming samples.

For distribution packaging, GLib and its dependencies must be included as shared libraries/dependencies.

The plugin can be compiled in one of two ways:

• System-wide libfluidsynth on UNIX. The plugin will output audio on its own (assuming the system-wide libfluidsynth has been compiled with a suitable output driver).
• Embedded FluidSynth synthesizer that outputs PCM sample data using Doomsday's main SFX interface. In this mode, FluidSynth does not have audio output capabilities of its own.¹⁾

• qmake

  CONFIG

  option deng_fluidsynth determines whether audio_fluidsynth is built is not enabled by default.

• uses the libfluidsynth present on the system
• outputs audio on its own; music volume controls the FluidSynth synthesizer gain

• supports FMOD as the audio playback target
• needs streaming samples; music volume controls the stream sample's volume
• deng_embedfluidsynth build option not enabled by default

<references/>

• Project using FluidSynth: http://www.doomworld.com/v​b/source-ports/55307-modif​ied-prboom-for-producing-v​ideos/