fluidsynth - Online in the Cloud

PROGRAM:

NAME

FluidSynth - a SoundFont synthesizer

SYNOPSIS

fluidsynth [options] [ SoundFonts ] [ midifiles ]

DESCRIPTION

FluidSynth is a real-time MIDI synthesizer based on the SoundFont(R) 2 specifications. It
can be used to render MIDI input or MIDI files to audio. The MIDI events are read from a
MIDI device. The sound is rendered in real-time to the sound output device.

The easiest way to start the synthesizer is to give it a SoundFont on the command line:
'fluidsynth soundfont.sf2'. fluidsynth will load the SoundFont and read MIDI events from
the default MIDI device using the default MIDI driver. Once FluidSynth is running, it
reads commands from the stdin. There are commands to send MIDI events manually, to load or
unload SoundFonts, and so forth. All the available commands are discussed below.

FluidSynth can also be used to play a list of MIDI files. Simply run FluidSynth with the
SoundFont and the list of MIDI files to play. In this case you might not want to open the
MIDI device to read external events. Use the -n option to deactivate MIDI input. If you
also want to deactivate the use of the shell, start FluidSynth with the -i option:
'fluidsynth -ni soundfont.sf2 midifile1.mid midifile2.mid'.

Run fluidsynth with the --help option to check for changes in the list of options.

OPTIONS

fluidsynth accepts the following options:

-a, --audio-driver=[label]
The audio driver to use. "-a help" to list valid options

-c, --audio-bufcount=[count]
Number of audio buffers

-C, --chorus
Turn the chorus on or off [0|1|yes|no, default = on]

-d, --dump
Dump incoming and outgoing MIDI events to stdout

-E, --audio-file-endian
Audio file endian for fast rendering or aufile driver ("-E help" for list)

-f, --load-config
Load command configuration file (shell commands)

-F, --fast-render=[file]
Render MIDI file to raw audio data and store in [file]

-g, --gain
Set the master gain [0 < gain < 10, default = 0.2]

-G, --audio-groups
Defines the number of LADSPA audio nodes

-h, --help
Print out this help summary

-i, --no-shell
Don't read commands from the shell [default = yes]

-j, --connect-jack-outputs
Attempt to connect the jack outputs to the physical ports

-K, --midi-channels=[num]
The number of midi channels [default = 16]

-l, --disable-lash
Don't connect to LASH server

-L, --audio-channels=[num]
The number of stereo audio channels [default = 1]

-m, --midi-driver=[label]
The name of the midi driver to use. "-m help" to list valid options.

-n, --no-midi-in
Don't create a midi driver to read MIDI input events [default = yes]

-o Define a setting, -o name=value ("-o help" to dump current values)

-O, --audio-file-format
Audio file format for fast rendering or aufile driver ("-O help" for list)

-p, --portname=[label]
Set MIDI port name (alsa_seq, coremidi drivers)

-r, --sample-rate
Set the sample rate

-R, --reverb
Turn the reverb on or off [0|1|yes|no, default = on]

-s, --server
Start FluidSynth as a server process

-T, --audio-file-type
Audio file type for fast rendering or aufile driver ("T help" for list)

-v, --verbose
Print out verbose messages about midi events

-V, --version
Show version of program

-z, --audio-bufsize=[size]
Size of each audio buffer

SETTINGS

All settings are non-realtime (have no effect if set after startup), except for those
indicated as realtime.

SYNTHESIZER

synth.audio-channels INT [min=1, max=128, def=1]
Number of audio channels (DOCME!).

synth.audio-groups INT [min=1, max=128, def=1]
Number of audio groups (DOCME!).

synth.chorus.active BOOL [def=True]
Chorus effect enable toggle.

synth.cpu-cores INT [min=1, max=256, def=1]
Number of CPU cores to use for multi-core support.

synth.device-id INT [min=0, max=126, def=0] REALTIME
Device ID to use for accepting incoming SYSEX messages.

synth.dump BOOL [def=False]
No effect currently.

synth.effects-channels INT [min=2, max=2, def=2]
No effect currently.

synth.gain FLOAT [min=0.000, max=10.000, def=0.200] REALTIME
Master synthesizer gain.

synth.ladspa.active BOOL [def=False]
LADSPA subsystem enable toggle.

synth.midi-channels INT [min=16, max=256, def=16]
Total MIDI channel count (must be multiple of 16).

synth.midi-bank-select STR [def='gs' vals:'gm', 'gs', 'xg', 'mma']
MIDI Bank Select message style.

synth.min-note-length INT [min=0, max=65535, def=10]
Minimum duration for note events (work around for very short percussion notes).

synth.overflow.age FLOAT [min=-10000, max=10000, def=1000]
Weigthing (on overflow) for a voice's duration.

synth.overflow.percussion FLOAT [min=-10000, max=10000, def=4000]
Weighting (on overflow) for a voice being on the drum channel.

synth.overflow.released FLOAT [min=-10000, max=10000, def=-2000]
Weighting (on overflow) for a voice that has been released, i e note off and no
sustain pedal.

synth.overflow.sustained FLOAT [min=-10000, max=10000, def=-1000]
Weighting (on overflow) for a voice that has been sustained, i e note off, but
sustain pedal held down.

synth.overflow.volume FLOAT [min=-10000, max=10000, def=500]
Weighting (on overflow) for a voice's volume.

synth.parallel-render BOOL [def=True]
Enables low-latency audio rendering response, even if synth is otherwise busy.
Should always to be true for usage by fluidsynth executable.

synth.polyphony INT [min=1, max=65535, def=256] REALTIME
Voice polyphony count (number of simultaneous voices allowed).

synth.reverb.active BOOL [def=True]
Reverb effect enable toggle.

synth.sample-rate FLOAT [min=22050.000, max=96000.000, def=44100.000]
Synthesizer sample rate.

synth.threadsafe-api BOOL [def=True]
Serializes access to the synth API. Must always to be true for usage by fluidsynth
executable.

synth.verbose BOOL [def=False]
Print received MIDI events to stdout.

GENERAL AUDIO

audio.driver STR
Audio driver to use. Default and valid options depend on available drivers.

audio.input-channels INT [min=0, max=2, def=0]
Not used currently? (DOCME).

audio.output-channels INT [min=2, max=32, def=2]
DOCME

audio.period-size INT [min=64, max=8192, def=64]
Period size for audio buffers. Used by many audio drivers.

audio.periods INT [min=2, max=64, def=16]
Count of audio buffers. Used by many audio drivers.

audio.realtime-prio INT [min=0, max=99, def=60]
Realtime priority to assign to audio thread or 0 to disable high priority
scheduling. Only used by some audio drivers (currently 'alsa' and 'oss').

audio.sample-format STR [def='16bits' vals:'16bits','float']
Audio output format, to select format for those drivers which support 16 bit or
floating point.

AUDIO DRIVER SPECIFIC

audio.alsa.device STR [def='default']
ALSA audio driver output device.

audio.coreaudio.device STR [def='default']
CoreAudio driver output device. Valid options depend on system.

audio.dart.device STR [def='default']
OS/2 Dart audio driver device.

audio.dsound.device STR [def='default']
Device to use for DirectSound driver. Valid options depend on system.

audio.file.endian STR [def='auto' vals:'auto','big','cpu','little']
File renderer or file driver byte order selection. 'auto' selects the default for
the selected file type. 'cpu' uses the CPU byte order. Limited to 'cpu' if no
libsndfile support.

audio.file.format STR [def='s16' vals:'double','float','s16','s24','s32','s8','u8']
File renderer or file driver audio format. Limited to 's16' if no libsndfile
support.

audio.file.name STR [def='fluidsynth.wav']
Output file name for file renderer or file driver.

audio.file.type STR [def='auto' vals:'aiff','au','auto','flac','oga','raw','wav']
Output file type for file renderer or file driver. 'auto' attempts to determine
type from file extension in audio.file.name. Limited to 'raw' if no libsndfile
support. Actual options will vary depending on libsndfile library.

audio.jack.autoconnect BOOL [def=False]
If enabled, then FluidSynth is automatically connected to Jack system audio output
ports.

audio.jack.id STR [def='fluidsynth']
Client ID to use when connecting to Jack.

audio.jack.multi BOOL [def=False]
TRUE to enable multi-channel output.

audio.jack.server STR [def='']
Jack server name. Blank for default.

audio.oss.device STR [def='/dev/dsp']
OSS driver output device.

audio.portaudio.device STR [def='PortAudio Default']
PortAudio driver output device. Available options depends on system.

audio.pulseaudio.adjust-latency BOOL [def=True]
Increases the latency dynamically if PulseAudio suggests so.

audio.pulseaudio.device STR [def='default']
PulseAudio driver output device.

audio.pulseaudio.media-role STR [def='music']
PulseAudio media role information.

audio.pulseaudio.server STR [def='default']
PulseAudio driver server.

GENERAL MIDI

midi.driver STR
MIDI driver to use. Default and valid options depend on available drivers.

midi.realtime-prio INT [min=0, max=99, def=50]
Realtime priority to assign to MIDI thread or 0 to disable high priority
scheduling. Only used by some MIDI drivers (currently 'alsa_seq', 'alsa_raw' and
'oss').

MIDI DRIVER SPECIFIC

midi.alsa.device STR [def='default']
ALSA raw MIDI driver device.

midi.alsa_seq.device STR [def='default']
ALSA sequencer MIDI driver device.

midi.alsa_seq.id STR [def='pid']
ALSA sequencer client ID. 'pid' will use process ID as part of the client name.

midi.coremidi.id STR [def='pid']
Client ID to use for CoreMIDI driver. 'pid' will use process ID as port of the
client name.

midi.jack.id STR [def='fluidsynth-midi']
Jack MIDI driver client ID.

midi.jack.server STR [def='']
Jack MIDI driver server. Blank to use default.

midi.oss.device STR [def='/dev/midi']
OSS MIDI driver device.

midi.portname STR [def='']
Port name used for CoreAudio and ALSA sequencer drivers.

midi.winmidi.device STR [def='default']
Device for Windows MIDI driver.

MISCELLANEOUS

player.reset-synth BOOL [def=True]
TRUE to reset synthesizer MIDI state between MIDI songs.

player.timing-source STR [def='sample' vals:'sample','system']
Selects timing source for MIDI sequencer. 'system' uses the system timer. 'sample'
uses the sample clock (amount of audio output, events synchronized with audio).

shell.port INT [min=1, max=65535, def=9800]
Shell command server TCP/IP port number to use.

shell.prompt STR [def='']
Shell prompt string.

SHELL COMMANDS

GENERAL

help Prints out list of help topics (type "help <topic>")

quit Quit the synthesizer

SOUNDFONTS

load filename
Load a SoundFont

unload number
Unload a SoundFont. The number is the index of the SoundFont on the stack.

fonts Lists the current SoundFonts on the stack

inst number
Print out the available instruments for the SoundFont.

MIDI MESSAGES

noteon channel key velocity
Send a note-on event

noteoff channel key
Send a note-off event

cc channel ctrl value
Send a control change event

prog chan num
Send program-change message

select chan sfont bank prog
Combination of bank-select and program-change

channels
Print out the presets of all channels.

AUDIO SYNTHESIS

gain value
Set the master gain (0 < gain < 5)

interp num
Choose interpolation method for all channels

interpc chan num
Choose interpolation method for one channel

REVERB

reverb [0|1|on|off]
Turn the reverb on or off

rev_preset num
Load preset num into the reverb unit

rev_setroomsize num
Change reverb room size

rev_setdamp num
Change reverb damping

rev_setwidth num
Change reverb width

rev_setlevel num
Change reverb level

CHORUS

chorus [0|1|on|off]
Turn the chorus on or off

cho_set_nr n
Use n delay lines (default 3)

cho_set_level num
Set output level of each chorus line to num

cho_set_speed num
Set mod speed of chorus to num (Hz)

cho_set_depth num
Set chorus modulation depth to num (ms)

MIDI ROUTER

router_default
Reloads the default MIDI routing rules (input channels are mapped 1:1 to the synth)

router_clear
Deletes all MIDI routing rules.

router_begin [note|cc|prog|pbend|cpress|kpress]
Starts a new routing rule for events of the given type

router_chan min max mul add
Limits the rule for events on min <= chan <= max. If the channel falls into the
window, it is multiplied by 'mul', then 'add' is added.

router_par1 min max mul add
Limits parameter 1 (for example note number in a note events). Similar to
router_chan.

router_par2 min max mul add
Limits parameter 2 (for example velocity in a note event). Similar to router_chan

router_end
Finishes the current rule and adds it to the router.

Router examples

router_clear

router_begin note

router_chan 0 7 0 15

router_end

Will accept only note events from the lower 8 MIDI
channels. Regardless of the channel, the synthesizer plays the note on ch 15
(synthchannel=midichannel*0+15)

router_begin cc

router_chan 0 7 0 15

router_par1 1 1 0 64

router_add
Configures the modulation wheel to act as sustain pedal (transforms CC 1 to CC 64
on the lower 8 MIDI channels, routes to ch 15)

AUTHORS

Peter Hanappe <[email protected]>
Markus Nentwig <[email protected]>
Antoine Schmitt <[email protected]>
Josh Green <[email protected]>
Stephane Letz <[email protected]>

Please check the AUTHORS and THANKS files for all credits

DISCLAIMER

SoundFont(R) is a registered trademark of E-mu Systems, Inc.

Aug 26, 2010 FluidSynth(1)

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