ZynAddSubFX is a fully featured musical software synthesizer for Linux, MacOS, BSD, and Windows. ZynAddSubFX exposes a wide array of synthesis parameters to make it flexible tool for sound design and a fun experience for playing instruments.


  • Polyphonic with support for legato and mono playing modes.
  • Three synthesizer engines:
    • Additive Synthesis for classic synth sounds composed of a variety of voices with powerful modulation. This exposes modulators ranging from LFOs and envelopes to oscillator modulators for FM, PM, and AM.
    • Subtractive Synthesis for creating variable bandwidth harmonics from filtered white noise.
    • PAD synthesis for creating beautiful pads and other instruments.
  • Powerful waveform generator with up to 128 sine/non-sine harmonics.
  • A variety of filters including analogue modeled filters, formant filters, and state variable filters.
  • Envelopes can have ADSR (or ASR, etc..) modes or can be free modes (with any shape).
  • Effects for Reverb, Echo, Chorus/Flange, Phasing, Wave-shaping, Equalizing, Dynamic Filtering with flexible signal routing.
  • Instruments can be organized in kits, which allows you to make drum kits or layered instruments; this makes possible to use more than one instrument for a single part. It is possible to choose what items from the kit should be processed by the Part’s effects.
  • Randomness settings to create subtle differences in each sound to help create that familiar analogue warmth.
  • Microtonal capabilities with any scale, up to 128 notes per octave, and key mapping.
  • Extensive MIDI/Audio driver support including JACK, ALSA, OSS, and PortAudio.
  • Session Management Support via LASH/NSM.
  • Plugin Support via DSSI/LV2/VST.
  • Over 1100 high quality instruments included.
Software type
LV2 plugin
VST2 plugin
VST3 plugin
Software language
Software features
Virtual keyboard
Audio input
Audio mixing
Audio FX
ZynAddSubFX development team

Recent releases Release Date
ZynAddSubFX 3.0.6 22 Jan '22
ZynAddSubFX 3.0.6-rc5 21 Dec '21
ZynAddSubFX 3.0.6-rc4 31 Jul '21
ZynAddSubFX 3.0.6-rc3 26 Mar '21
ZynAddSubFX 3.0.6-rc2 24 Mar '21
ZynAddSubFX 3.0.6-rc1 11 Jan '21
ZynAddSubFX 3.0.5 15 Apr '19
ZynAddSubFX 3.0.4 10 Mar '19
ZynAddSubFX 3.0.3 2 Dec '17
ZynAddSubFX 3.0.2 21 Jul '17