2RuleSynth, free Synthesizer plugin with a unique concept and character

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2RuleSynth is a free Synthesizer VST3 plugin with a unique concept and character offering a lot of functionality to experiment with.

There are now tons of free Synthesizer plugins for macOS and Windows. I have put them together in a list that is updated regularly. Today, we welcome another one but one of the more special and weird free synths I’ve tested so far.

The developer of 2RuleSynth is 2Rule who recently released very unique free plugins such as the TwoRuleFilter. It’s a filter plugin that is capable to produce unusual filter effects including glitching. His new Synthesizer looks very classic subtractive but has a structure and sound that are worth exploring.



2RuleSynth is a new free 8-voice poly Synthesizer plugin that offers classic virtual analog synthesis in combination with FM and ring modulation. Sounds classic but the structure is different.

Each oscillator has its own filter, amp, envelopes, and LFOs. In classic synths, these parts work on the entire engine. Here every oscillator can be seen as its own voice. Thus, you can achieve more complex sounds here even if it’s “just classic subtractive synthesis”. I like it as it’s a refreshing approach to it. Each oscillator has classic waveforms including sine, saw, square and white noise. You can adjust them with four controls: waveform, mode, fine-tune, and octave. PWM is currently missing, hopefully, the developer will add it in the future.

More complex, no problem. You can activate up to three different oscillator modulations simultaneously. Available is ring modulation (RM), frequency modulation (FM), a well as waveshape distortion giving timbres with more harmonics and character. Then you have per oscillator a filter, two envelopes (filter, amp), and three LFOs with sync (amp, filter, pitch). The filter is a resonating Moog type filter with LP, HP, and BP.

2RuleSynth has a total of 4 envelopes, and 6 LFOs for setting your parameters in motion. A little downer: tons of modulation but little flexibility. The modulators are fixed and cannot be routed differently. And there is also no mod matrix. At the end of the signal, it offers an advanced chorus, and simple syncable delay, and reverb processors. Handy, the developed added a spectrum analyzer, a wave window as well a preset randomizer. With one push you can design new sounds. Often crazy sounds are the result but it’s a nice addition for it.

Sound Demo

At first glance a very special free Synthesizer plugin. It’s certainly not a premium synth like U-he Diva, Xfer Serum, Massive 2… but a fun synth. Its sound is very peculiar and weird. Also very experimental as it sounds very crazy and harsh in many places. Definitely a free synth tip.

According to the developer, it’s a beta version made in the Juce Framework and it was developed to gain experience in this environment. Updates with new features are planned which is a very welcomed news. And thanks 2Rule for this free release.

2Rule 2RuleSynth is available now as a free download for macOS and Windows. It runs as a 64-bit only VST3 plugin.

More information here: 2Rule

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