An open source semi-modular VST3 synthesizer and effect plugin.

Known issues

Context menu doesn't work in Studio One.


64-bit Windows 7+ and a CPU with AVX support.
Tested in Renoise, REAPER, Bitwig Studio and FL Studio.
Distributed as VST3, no other plugin formats supported.


When in doubt, you want the release version.
V1.1.2 | release | debug | demos | March 15, 2023 | Basic theming support (see manual).
V1.1.1 | release | debug | demos | March 12, 2023 | Bugfix release.
V1.1 | release | debug | demos | March 6, 2023 | Renamed from SevenSynth.


Read the manual:
Read the changelog:
See the github page for details and source code:
Play around with the demo projects:


For questions, feedback or constructive criticism use the github project or contact me directly at sjoerdvankreel at
Hatemail will be ignored or exposed depending on my mood.


If you were using a previous "Generic" version, delete that first. Extract the zip archive and copy the InfernalSynth folder to C:\Program Files\Common Files\VST3. Overwrite anything that may already be there. Versioned builds can coexist with other versioned builds, but there can only be one generic build installed. For windows 7 and 8, you'll also need Microsoft's VC++ redistributable package, see the X64 download over here:


Acid line
Mono lead
Demo track