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
ZynAddSubFX development team

Recent releases: