Recent Releases
2.4.525 Jul 2025 20:05
minor feature:
lt;ul gt;.
lt;li gt;Prebuilt Windows Binaries were missing lt;code gt;SDL3.dll lt;/code gt; lt;/li gt;.
lt;li gt;SDL3 intercepting signals, causing lt;code gt;CTRL+C lt;/code gt; to not quit fluidsynth lt;/li gt;.
lt;li gt;a few flaws in the AWE32 NRPN implementation lt;/li gt;.
lt;li gt;A regression introduced in 2.4.4 broke drum preset selection for XG MIDIs lt;/li gt;.
lt;li gt;for OpenMP thread affinity crashes on Android devices lt;/li gt;.
lt;li gt;fluidsynth's systemd user daemon being unable to create lock file on some distros lt;/li gt;.
lt;li gt;fluidsynth ignoring lt;code gt;initialFilterFc lt;/code gt; generator limits lt;/li gt;.
lt;li gt;A regression introduced in 2.3.6 prevented SF2 NRPN messages from being processed correctly lt;/li gt;.
lt;/ul gt;.
lt;p gt; lt;em gt;Hint to package maintainers: Pls. make sure to install the newly added lt;code gt;fluidsynth.tmpfile lt;/code gt;, as lt;a href="https://github.com/FluidSynth/fluidsynth/blob/f8cdcb846b5c7c32a1de99db0ff69c4841142a99/contrib/fluidsynth.spec#L101C1-L101C83" gt;shown here lt;/a gt;. lt;/em gt; lt;/p gt;.
lt;p gt;Edit: Pls. note that the filename of fluidsynth's DLL is incorrect in this release. lt;/p gt;.
2.4.414 Apr 2025 02:45
minor feature:
lt;ul gt;.
lt;li gt;Support for SDL3 has been added, support for SDL2 has been deprecated lt;/li gt;.
lt;li gt;Soundfonts that are not respecting the 46 zero-sample padding-space previously sounded incorrect when lt;br gt;.
lt;code gt;synth.dynamic-sample-loading lt;/code gt; was active lt;/li gt;.
lt;li gt;Allow drum channels to profit from Soundfont Bank Offsets by no longer ignoring MSB Bank changes lt;/li gt;.
lt;li gt;Revise the preset fallback logic for drum channels lt;/li gt;.
lt;li gt;A regression introduced in 2.4.1 may have caused interrupted real-time playback when voices were using the lowpass filter lt;/li gt;.
lt;li gt;Improve multi-user experience when running fluidsynth as systemd service lt;/li gt;.
lt;li gt;ordering and dependencies of fluidsynth's systemd service lt;/li gt;.
lt;li gt;Revise fluidsynth's man page lt;/li gt;.
lt;/ul gt;.
lt;p gt;Note about cross-compilation: The CMake variable lt;code gt;FLUID_HOST_COMPILER lt;/code gt; has been superseded by the Autools convention of using environment variables like lt;code gt;CC_FOR_BUILD lt;/code gt; and friends lt;/p gt;.
lt;hr gt;.
lt;h1 gt; lt;a href="https://github.com/FluidSynth/fluidsynth/discussions/1504" data-hovercard-type="discussion" data-hovercard-url="/FluidSynth/fluidsynth/discussions/1504/hovercard" gt;Thanks for 2k stars! lt;/a gt; lt;/h1 gt;.
lt;p gt; lt;a href="https://www.star-history.com/#FluidSynth/fluidsynth amp;amp;Date" rel="nofollow" gt; lt;img src="https://camo.githubusercontent.com/c0efe3f8a1ef2d5a8a2b7889483c0a15151bb8eddec71464a91667767b3d0abe/68747470733a2f2f6170692e737461722d686973746f72792e636f6d2f7376673f7265706f733d466c75696453796e74682f666c75696473796e746826747970653d44617465" alt="Star History Chart" data-canonical-src="https://api.star-history.com/svg?repos=FluidSynth/fluidsynth amp;amp;type=Date" style="max-width: 100 ;" gt; lt;/a gt; lt;/p gt;.
2.4.327 Jan 2025 00:25
minor feature:
lt;ul gt;.
lt;li gt;It was discovered, that exclusive class note terminations were too slow lt;/li gt;.
lt;li gt;a regression introduced in 2.4.0 that allowed the amplitude of a voice playing in delay phase to rise infinitely lt;/li gt;.
lt;li gt;MSGS drum-style note-cut has been converted to an opt-in setting lt;a href="https://www.fluidsynth.org/api/fluidsettings.xml#synth.note-cut" rel="nofollow" gt; lt;code gt;synth.note-cut lt;/code gt; lt;/a gt; lt;/li gt;.
lt;li gt;Support for SDL2 has been disabled by default lt;/li gt;.
lt;li gt;a regression introduced in 2.4.1 that could have caused infinite audio gain output for some MIDI files under certain configurations lt;/li gt;.
lt;li gt;Silence a warning d by Systemd v254+ lt;/li gt;.
lt;/ul gt;.
lt;p gt;*It was found that SDL2 hijacks fluidsynth's lt;code gt;main() lt;/code gt; function which causes build problems on Windows, see. A PR for migrating to SDL3 is highly welcome! If you still want to compile with SDL2 support, you need to explicitly enable it using CMake flag lt;code gt;-Denable-sdl2=1 lt;/code gt;. lt;/p gt;.
2.4.231 Dec 2024 20:45
minor feature:
lt;ul gt;.
lt;li gt;audible clicks when turning off voices while using a high filter resonance lt;/li gt;.
lt;li gt;a build failure with MSYS2 and MinGW when processing lt;code gt;VersionResource.rc lt;/code gt; lt;/li gt;.
lt;li gt;a crash on startup when there are no MIDI devices available on Windows lt;/li gt;.
lt;li gt;Restore discovery of libsndfile lt;/li gt;.
lt;li gt;a race condition when loading SF3 files containing multiple uncompressed samples lt;/li gt;.
lt;/ul gt;.
2.4.105 Dec 2024 06:05
minor feature:
lt;ul gt;.
lt;li gt;Enable libsndfile to use filename with non-ASCII characters on Windows lt;/li gt;.
lt;li gt;a few commandline encoding related on Windows lt;/li gt;.
lt;li gt;build errors on Windows lt;/li gt;.
lt;li gt;clicks and pops caused when changing parameters of the lowpass filter lt;/li gt;.
lt;li gt;Minor adjustment to AWE32 NRPN behavior lt;/li gt;.
lt;/ul gt;.
2.4.015 Nov 2024 20:16
minor feature:
New Features
Implement MSGS-style Drum Note Cut (#1199)
Support KAI audio driver on OS/2 (#1332, thanks to @komh)
Add support for AWE32 NRPNs (#1346)
Add support for Polyphone's sample loop mode release (#1398, thanks to @spessasus)
Add support for SF2.04 absolute value modulators (#1391, thanks to @spessasus)
Breaking Changes
LASH support has been removed (#1285)
Musically Breaking changes
The default settings for reverb and chorus have been tuned to provide a more natural perception (#1282, thanks to @es20490446e)
The behavior of the volume envelope's delay phase was previously incorrect (#1312)
The ModLfoToVolume generator was not able to increase the volume (#1374)
Fluidsynth's default device-id was changed, allowing it to process (most) SysEX events without further configuration (#1382)
Previously, some modulators were treated in a non-standard way (#1392, #1389, #1068)
Bug Fixes
Bogus interpolation of IIR filter coefficients could have caused audible clicks and cracks (#1345) - yet there is still a potential for clicks and cracks, see #1415
2.3.530 Mar 2024 02:25
minor feature:
Add FLUID_HOST_COMPILER cmake variable
.
2.3.412 Oct 2023 10:13
minor bugfix:
Fix a build failure when specifying CMAKE_INSTALL_LIBDIR as an absolute path (#1261, thanks to @OPNA2608)
Fix some MIDI files never finish playing (#1257, thanks to @joanbm)
Implement IPv6 to IPv4 fallback (#1208, thanks to @ivan-zaera)
Fix a build failure when using CMake's Xcode generator (#1266, thanks to @bradhowes)
Fix pipewire's Jack implementation not found by CMake (#1268, thanks to @pedrolcl)
Fix a regression causing the MIDI Player to terminate prematurely (#1272, thanks to @albedozero)
2.3.320 Jul 2023 22:44
minor bugfix:
Fix choppy sound when selecting pipewire output (#1230, thanks to @nilninull)
Fix build issues on musl-based distros (#1229)
Terminate MIDI player once internal synth-ticks overflow to prevent filling up the filesystem (#1233)
Fix a bug that allowed playing notes outside of key and velocity ranges (#1250)
2.3.021 Sep 2022 03:15
minor feature:
Add linear interpolation to convex and concave transfer functions
Co-authored-by: md1872b lt;72792887+md1872b@users.noreply.github.com gt;.
2.2.312 Sep 2021 11:25
minor feature:
FluidSynth did not build on macOS 10.5 and earlier.
Build with CMake
2.2.213 Jul 2021 03:15
minor feature:
The MIDI router now handles out-of-range parameters in a smarter manner.
Keep pedaling effective when the same note is played more than once.
Select soundfont samples by frequency instead of midi note numbers.
The sequencer's event ordering for NoteOn vel=0 events.
Libfluidsynth's import library was broken for MinGW builds.
Fluidsynth.exe short option -Q not working.
Precompiled Android binaries didn't work (#894, #897).
OpenMP detection for XCode 12.5.
Make audio.jack.autoconnect connect all available ports.
Prevent MIDI Player from continuously suppressing notes.
Fluidsynth.pc now includes private libraries for static linking.
Typos in code and documentation.
2.2.109 May 2021 17:25
minor feature:
Make ALSA the default driver on Linux.
Coreaudio driver failed to initialize on MacOS 11.
WaveOut driver failed to initialize.
COM initialization in WASAPI driver is no longer performed in the caller's context.
WASPI driver now supports reverb and chorus.
Handle SysEx GM/GM2 mode on, GS reset, and XG reset.
Old behaviour of fluid_player_join has been restored to prevent infinite loop in client code.
The Soundfont loader code has been refactored, illegal generators will now be skipped more consequently.
2.2.003 Apr 2021 03:16
minor feature:
Support loading SoundFonts 2GiB on Windows.
Major overhaul of the sequencer and its event queue
Overlapping notes can be handled
Performance improvement, since the event queue no longer blocks the rendering thread
Time scale is not limited to 1000 anymore and can therefore be used for tempo changes
.
Overlapping notes can be handled.
Performance improvement, since the event queue no longer blocks the rendering thread.
Time scale is not limited to 1000 anymore and can therefore be used for tempo changes.
The following audio drivers have gained multi-channel support
DSound
WaveOut
.
DSound.
WaveOut.
The WinMIDI driver supports multiple devices.
Handle GS DT1 SysEx messages for setting whether a channel is used for rhythm part.
Support use of UTF-8 filenames under Windows.
Improved support for overriding tempo of the MIDI player.
Handle settings-related commands in user command file before initializing other objects.
SoundFont loading has been parallelized (#746, #812, requires openMP).
The Oboe driver has gained a lower latency and other updates (#740, #741, #747).
WASAPI driver has been added.
race condition in fluid_player_callback.
Improvements to LADSPA subsystem.
2.2.0.rc119 Mar 2021 03:16
minor feature:
Rapidly changing channel panning could have caused audible artifacts. Affects all versions back to at least 1.1.2.
a use-after-free when loading malformed soundfonts. Affects all versions back to at least 1.1.2.
The number of allowed LADSPA effect units has been increased.
2.1.816 Mar 2021 03:15
minor feature:
Rapidly changing channel panning could have caused audible artifacts. Affects all versions back to at least 1.1.2.
a use-after-free when loading malformed soundfonts. Affects all versions back to at least 1.1.2.
The number of allowed LADSPA effect units has been increased.
2.2.0.beta109 Feb 2021 03:16
minor feature:
a regression introduced in 2.1.0 prevented chorus from being audible when fluid_synth_process() was used.
a regression introduced in 2.0.6 prevented the MIDI player from restarting playback after all files have been played.
a double-free violation introduced in 2.0.0 after executing the info shell command.
2.1.730 Jan 2021 11:25
minor feature:
a regression introduced in 2.1.0 prevented chorus from being audible when fluid_synth_process() was used.
a regression introduced in 2.0.6 prevented the MIDI player from restarting playback after all files have been played.
a double-free violation introduced in 2.0.0 after executing the info shell command.
2.1.604 Jan 2021 03:25
minor feature:
Polyphony is ever exceeded, or.
Voices are still playing while their SoundFont is being unloaded.
a heap-based use-after-free.
2.1.521 Sep 2020 05:45
minor feature:
Loading DLS may have failed in certain setup environments.
a build failure with GCC 4.8.
2.1.414 Jul 2020 10:05
minor feature:
an uninitialized memory access possibly triggering an FPE trap.
Several regressions introduced in 2.1.3:
Fluid_synth_start() failed for certain presets
a NULL dereference in jack driver
a stack-based overflow when creating the synth
.
Fluid_synth_start() failed for certain presets.
a NULL dereference in jack driver.
a stack-based overflow when creating the synth.
2.1.327 May 2020 13:05
minor feature:
a cross-compilation failure from Win32 to WinARM.
While fluid_player is seeking (#634, #646).
a NULL pointer dereference if synth.dynamic-sample-loading is enabled.
a NULL pointer dereference in delete_rvoice_mixer_threads().
a NULL pointer dereference in the soundfont loader.
Dsound driver playing garbage when terminating fluidsynth.
Avoid memory leaks when using libinstpatch.
2.1.207 Apr 2020 03:15
minor feature:
Fluidsynth now exits with error when user-provided command-line arguments are out-of-range.
Add verbose error logging to opensles and oboe drivers.
a memory leak in oboe driver.
a NULL dereference in the fluidsynth commandline program.
2.1.118 Feb 2020 13:25
minor feature:
a regression introduced in 2.1.0 caused the jack audio driver to not correct a sample-rate mismatch.
Pkg-config is now being to used to find readline.
Various typos in the documentation.
a memory leak in the file renderer.
Leaking memory when sequencer clients were not explicitly unregistered.
a heap-based use-after-free in jack driver.
The linker possibly not finding libinstpatch.
2.1.001 Dec 2019 04:05
minor feature:
an implicitly declared function caused a pointer to int truncation in CoreAudio driver.
a stack-based overflow in CoreAudio driver.
2.0.915 Nov 2019 03:25
minor feature:
an implicitly declared function caused a pointer to int truncation in CoreAudio driver.
a stack-based overflow in CoreAudio driver.
2.1.0.rc128 Oct 2019 05:45
minor feature:
Incorrect behavior of fluid_sample_set_sound_data().
Voices being mixed incorrectly, causing audible crackle esp. at sample-rates 48kHz.
Make sure that defining NDEdisables assertions.
2.0.729 Sep 2019 03:15
minor feature:
Broken audio output when reverb was active after synth creation.
Deconsole messages not being visible for debuilds on Windows.
2.0.625 Sep 2019 21:39
minor bugfix:
fix an uninitialized memory access, which could have led to NULL dereference or heap corruption in an out-of-memory situation
fix a use-after-free when calling fluid_player_stop()
fix the MIDI player not outputting any sound after stopping and restarting the playback (#550)
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