Checked September 2026
Matt Tytel
Helm review
SynthsFree version
Free, open-source subtractive synth with polyphonic modulation; Matt Tytel's predecessor to Vital. Best for a lightweight, no-cost open-source subtractive synth from Vital's creator. Price: Free.
Key features
- Polyphonic modulation system
- Open-source, GPL-licensed codebase
- Cross-platform standalone and plugin builds
- 32/64-bit builds available
Pros
- Fully free and open source, source available on GitHub
- Runs standalone or as a plugin across Windows/macOS/Linux
Cons
- Superseded by the developer's newer synth Vital; the page shows no recent version activity and is likely unmaintained/legacy
- No VST3 or AAX builds listed
Helm alternatives
Free spectral warping wavetable synth, the best-known free Serum alternative.
VST3supportedAUsupportedAAXnot supportedCLAPsupportedWINsupportedMACsupportedLNXsupportedFree, open-source hybrid synthesizer with extensive filters and a flexible modulation engine.
VST3supportedAUsupportedAAXnot supportedCLAPsupportedWINsupportedMACsupportedLNXsupported- FREE
Digital Suburban
Dexed
Free, open-source FM synthesizer plugin modeled closely on the Yamaha DX7.
VST3not supportedAUsupportedAAXnot supportedCLAPnot supportedWINsupportedMACsupportedLNXsupported
Sources: tytel.org