Explore one synthesis engine at a time and save simple patches before combining layers. Test MIDI response and audio routing in the intended setup.
Check the download route carefully, since the project distinguishes its open-source code and available packages from the separately priced Zyn-Fusion binary offering. No. The official page advertises a paid Zyn-Fusion binary release while linking the open-source code separately. The official description lists additive, subtractive and PAD synthesis engines.