qsynth - Man Page

A fluidsynth Qt GUI Interface

Synopsis

qsynth [options] [soundfonts] [midifiles]

Description

This manual page documents briefly the qsynth command-line options.

Qsynth is a fluidsynth GUI front-end application written in C++ around the Qt framework using Qt Designer. Eventually it may evolve into a softsynth management application allowing the user to control and manage a variety of command line softsynths but for the moment it wraps the excellent FluidSynth.

FluidSynth is a command line software synthesiser based on the Soundfont specification.

Options

-n,  --no-midi-in

Don't create a midi driver to read MIDI input events [default = yes]

-m,  --midi-driver <label>

The name of the midi driver to use [alsa_raw, alsa_seq, jack, ...]

-K,  --midi-channels <num>

The number of midi channels [default = 16]

-a,  --audio-driver <label>

The audio driver [alsa, jack, pipewire, ...]

-j,  --connect-jack-outputs

Attempt to connect the jack outputs to the physical ports.

-L,  --audio-channels <num>

The number of stereo audio channels [default = 1]

-G,  --audio-groups <num>

The number of audio groups [default = 1]

-z,  --audio-bufsize <size>

Size of each audio buffer.

-c,  --audio-bufcount <count>

Number of audio buffers.

-r,  --sample-rate <rate>

Set the sample rate.

-R,  --reverb <flag>

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

-C,  --chorus <flag>

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

-g,  --gain <gain>

Set the master gain [0 < gain < 2, default = 1]

-o,  --option <name=value>

Define a setting name=value

-s,  --server

Create and start server [default = no]

-i,  --no-shell

Don't read commands from the shell [ignored]

-d,  --dump

Dump midi router events.

-V,  --verbose

Print out verbose messages about midi events.

-?,  --help

Displays help on command-line options.

-v,  --version

Show version information.

Files

Configuration settings are stored in ~/.config/rncbc.org/Qsynth.conf

See Also

fluidsynth(1)

Author

Qsynth is written by Rui Nuno Capela, Richard Bown, Chris Cannam, Pedro Lopez-Cabanillas.

Info

April 16, 2026