Ger Synthmaster One, an easy-to-use yet powerful wavetable Synthesizer plugin by KV331 Audio, is available for free download for a limited time.
The article title is unambiguous. Yes, a commercial synthesizer plugin is available for free download until January 4th, 2026
KV331 Audio is offering its easy-to-use wavetable Synthesizer Synthmaster One as a free download for a limited time. The regular price is $49.
Synthmaster One By KV331 Audio
Synthmaster One is an easy-to-use wavetable Synthesizer for macOS and Windows with a powerful synth engine.
The synth features two stereo wavetable oscillators with two sub-oscillators, two filters, four ADSR envelopes, two LFOs, a multi-FX processor, a 32-step arpeggiator/sequencer, and various advanced routing options.
Let’s start where the sound is produced. Yes, the two wavetable oscillators. Each oscillator has a stereo output and supports classic waveforms and single-cycle waveforms as wavetables that you can import via drag-and-drop.
Each oscillator features 17 powerful algorithms, allowing you to shape and bend your waveforms and wavetables. There is also a fully customizable 16-voice unison capable of rich supersaw-type sounds.
Also a highlight are the two super flexible sub-oscillators. They can be connected to oscillators in five modes, allowing you to use them as a standard sub-oscillator or for complex modulation.
This includes RM, AM, phase modulation (PM), and frequency modulation (FM). The filter section is also pretty impressive.
Synthmaster One features two independent filter sections, each powered by four Zero Delay Feedback filter modes: ladder, diode, state variable, and bite. Additionally, you can use advanced filter parameters to spice them up.
More Sound Design Options
On the modulation side, it features four multimode ADSR envelopes with velocity control and two multi-wave advanced LFOs. Additionally, you have modulation sources such as velocity, aftertouch, mod wheel, and more.
An easy-to-use modulation matrix manages all your modulation assignments.
Further, you can refine and boost your sounds with a multi-FX processor with six FX slots and 11 effects types: distortion, LoFi, ensemble, phaser, six band EQ, band EQ, compressor, vocoder, delay, chorus, tremolo, and reverb.
Neat is that you can freely configure the multi-FX. Each of the 11 effect types can be inserted on any layer insert or on any of the two global effect bus inserts.
Don’t forget the fun, creative arpeggiator with up to 32 steps and plenty of modes to explore. One of these is a sequencer mode that provides step-sequencer behaviour.
An extensive sound library tops it all. SynthMaster One includes 1250 factory presets from a world-class team of sound designers, and all sounds are NKS-compatible.
Synthmaster One For Free
I don’t need to tell you that this is a huge deal you shouldn’t miss. SM One is on the same level as Serum 1, Massive X, and other wavetable synths on the market. So, yes, this is a no-brainer deal you can’t ignore.
Synthmaster One by KV331 Audio is available now for free download until January 4th, 2026. It runs as a VST, VST3, AU, and AAX plugin on macOS (native Apple Silicon + Intel) + Windows.
You need a KV331 Audio account to register and activate the plugin. Existing SynthMaster One users aren’t left out either, with KV331 Audio offering credit coupons that can be used on expansion packs or bundle upgrades.
KV331 Audio also launched its Holiday sale, offering up to 60% off plugins and sound sets. For example, you can get the Synthmaster One All Expansion bundle for $39, which adds more presets to the plugin.
More information here: KV331 Audio



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