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DexedZynAddSubFX
Free

Free and open source under the GPL v3.

 Freemium

Source code is free; the Zyn-Fusion binary release is pay what you want from $45.

Windows, macOS, Linux Windows, macOS, Linux
  • Sound engine closely modelled on the DX7
  • Loads and saves DX7 and TX7 sysex patches
  • Three synthesis engines including PAD synthesis
  • Wide choice of filters and free-form envelopes
  • Needs a plugin host such as a DAW
  • Documentation is minimal
  • Ready-made Zyn-Fusion binaries are paid
  • Deep parameter set takes time to learn
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: GPL-2.0
Not stated if an account is needed No account needed
Works offline Works offline

Checked September 24, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.