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SynthMaster 2

Synth (Semi Modular) by KV331 Audio

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from Synthmaster One

from Synthmaster Player

SynthMaster 2 SynthMaster SynthMaster SynthMaster SynthMaster SynthMaster SynthMaster SynthMaster SynthMaster SynthMaster SynthMaster SynthMaster SynthMaster
What is it?
Operating System Availability
Operating System Latest Version 
System Requirements
CPU: 2 Ghz (SSE3)
OS: Windows 7 (64-bits) and above
AAX: ProTools 11 and above 
System Requirements
CPU: 2 Ghz (SSE3)
OS: Mac OS X 10.9 (64-bits) and above
AAX: ProTools 11 and above
License & Installation Method
Voucher / Code for redemption on other website
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For related news items, downloads and more please see the full KVR product page for
SynthMaster 2

SynthMaster 2 is an 'all-round' semi-modular software synthesizer and effect plug-in that features many different synthesis methods including VA, Additive, Wavetable, Phase Modulation, Phase Distortion, Frequency Modulation, Pulse Width Modulation, Ring Modulation, Amplitude Modulation, Physical Modeling and SFZ Sample Playback synthesis.

With its multi-synthesis oscillators, zero delay feedback filters, flexible effects routing with 11 types of high quality effects and a massive modulation architecture with 95 separate modulation sources and hundreds of modulation targets, SynthMaster is a powerful instrument for all synthesizer enthusiasts.


  • Cross-platform VST/AU/AAX: SynthMaster runs as a VST/AAX instrument/effect on both Windows and Mac OS X, and as a VST/AU/AAX instrument/effect on Mac OS X.
  • 2000 NKS Compatible Factory Presets: SynthMaster comes with 2000 factory presets from a world class team of sound designers: Arksun, BigTone, Kevin Schroeder, Yuli Yola, NatLife, Selcuk Ergen, Michael Kastrup, Rob Lee, Nori Ubukata, Ufuk Kevser, Fragment Audio, Gercek Dorman, VorpalSound, Vandalism, BluffMonkey, Ümit 'Insigna' Uy, Aiyn Zahev, Frank 'Xenox' Neumann, Teoman Pasinlioglu and Brian 'Xenos' Lee. All of those factory presets are NKS compatible, so they can easily be previewed/tweaked inside Komplete Kontrol/Maschine hardware/software.
  • Semi-Modular Architecture: For each SynthMaster instance, there are 2 layers followed by 2 global effect send buses. Each layer has its own: Arpeggiator, 2 Oscillators, 4 Modulators, 2 Filters, 4 ADSR Envelopes, 4 Multistage Envelopes, 2 2D Envelopes, 4 LFOs, 4 Sequencers and 4 Keyscalers. The modulators can modulate frequency, phase, amplitude or pulse width of the oscillators or any other modulators at audio rate, or they can be used as sub-oscillators.
  • Massive Modulation Architecture: SynthMaster has hundreds of modulation targets and 95 modulation sources including ADSR Envelopes, 2D Envelopes, Multistage Envelopes, LFOs, Sequencers, KeyScalers, Easy Parameters, MIDI Velocity, Aftertouch, Pitch Bend and MIDI CCs. The modulation matrix, has 64 available slots which can grow when necessary. There is visual filtering as well so that targets for a specific source, or sources for a specific target can be filtered and shown on the user interface.
  • Easy Parameters: SynthMaster features 8 easy knobs and 2 XY pads that can be freely assigned as modulation sources, so that the complexity of the synth engine could be hidden away and only most important parameters of a preset can be controlled by the user. The easy parameters can be globally linked to MIDI controllers, and they can be assigned automatically by SynthMaster as well.
  • Powerful Arpeggiator: The arpeggiator in SynthMaster features classic arpeggiator modes such as Up, Down, UpDown, DownUp, UpDown2, DownUp2, AsPlayed as well as Sequence, Chord, Arpeggiate and DrumKit modes. Each of the 32 steps of the arpeggiator has its own Velocity, Note Number, Note Length, Slide and Hold parameters.
  • Basic Oscillators: 'Basic' oscillators in SynthMaster are capable of synthesizing many different types of waveforms: Sine, Square, Triangle, Sawtooth, Pulse, Noise, any single cycle waveforms and multi-sampled WAV/AIFFs defined in SFZ files.
  • Additive Oscillators: An 'Additive' oscillator is actually 8 'basic' oscillators running together. Each 'basic' oscillator has its own detune, tone, phase/pulse width, frequency and waveform type.
  • Vector Oscillators: A 'Vector' oscillator consists of 4 'basic' oscillators, mixed at different ratios. The mix ratios are determined by 2 orthogonal parameters in 2 dimensions: 'X Index' and 'Y index'.
  • Wavetable Oscillators: A 'Wavetable' oscillator is similar to basic oscillator, except that the waveform can be scanned (interpolated) through up to 16 different waveforms shapes. The position of the waveform can be adjusted using the 'wave index' parameter.
  • Stereo Oscillators with Improved Unison: Oscillators in SynthMaster have stereo output. With the "voices", "voices mix", "pan spread", "detune spread" and "detune curve" parameters, each basic/wavetable oscillator can have its own unison settings which eliminates the need to enable unison for all voice elements.
  • VAnalog Filters: The 'vanalog' filters are modelled after the famous ladder filter, so they self oscillate when the filter resonance is maxed out. They have continuously variable slope, which is unique to SynthMaster. There are 3 CPU settings for analog filters: "Basic", "Normal" and "High". With the "Basic" setting, CPU can be reduced by at least 50%.
  • Zero Delay Feedback Filters: All of the 4 new filter categories (Ladder, Diode Ladder, SVF and Bite) in SynthMaster are developed using the zero delay feedback filter technology. With advanced filter parameters like input gain, drive and acid, you can get that "analog" sound from the filters.
  • Digital Filters: The 'digital' filters are biquad filters with a hard limiter in their output. The limiter features an envelope follower with attack, release and threshold parameters.
  • Multimode Filters: With the 'multimode' filter type, it is possible to switch from Lowpass to Bandpass to Highpass filter types continuously. For vanalog multimode filters, it is also possible to change the slope of the filter continuously from 0 db/oct to 24 db/oct.
  • Dual Filters: With the 'dual' filter type, two multimode filters can be run simultaneously, either in parallel, or in series. The mix ratios between the filters, and the topology (parallel/series) between them can be changed continuously, as well as the modes and cutoff frequencies of the filters.
  • Comb Filters: Comb filters are digital filters used in physical modeling synthesis.
  • Before/Inside/After Filter Distortion: A distortion stage can be inserted before, after, or even inside the filters.
  • Rich Set of Effects: SynthMaster features 11 different effect types: Distortion, LoFi, Ensemble, Phaser, 6 Band EQ, Compressor, Vocoder, Delay, Chorus, Tremolo, Reverb.
  • Flexible Effects Routing: Each of the 11 effect types can be inserted on any layer insert or on any of the 2 global effect bus inserts.
  • Microtuning: SynthMaster supports Scala tuning, so tuning can be set either for each preset or globally by loading from a Scala tuning file.
  • Preset Browser: SynthMaster features a comprehensive preset browser with separate search criteria for instrument type, preset attributes, music style or preset author.
  • Public User Library: Registered users can upload their presets to public users library, or download presets created by other registered users.
  • Multiple Skins: SynthMaster comes with different skins in different color variations. Using the included user interface editor, users can not only customize the existing skins but also can create their own custom interfaces as well.
  • Import of MIDI patterns as Arpeggiator Sequence: Monophonic or even polyphonic (chord) MIDI patterns can be imported into the arpeggiators in SynthMaster by just drag and drop of the MIDI file onto the arpeggiator view on the plug-in window.
  • Import of WAV/AIFF Multisamples as SFZ definitions: Multisamples in WAV/AIFF formats could be imported into SynthMaster as SFZ definitions, by simply drag and drop of the WAV/AIFF files onto the oscillator waveform view on the plug-in window.

A demo version of SynthMaster is available. It is identical to the standard version except for 3 limitations:

  1. Saving presets is disabled.
  2. The synth starts playing random notes after 30 minutes.
  3. Comes with 1200 factory presets (demo users can check out the remaining factory presets from the online presets browser though).

Audio demos of SynthMaster's factory presets can be listened at:



KV331 Audio has also been releasing expansions for SynthMaster, in various genres. So far, there are a total of 36 expansion banks for SynthMaster in the 'Everything' Bundle. They can be listened to at KV331 Audio's SoundCloud page:


SynthMaster Player free

KV331 Audio has recently released a free "Player" version of SynthMaster that comes with 600 factory presets. Users of this free "Player" version can purchase and use commercial preset banks released by KV331 Audio. They can also upgrade to the Player version which comes with 2000 factory presets.

{See video at top of page}

User Reviews Average user rating of 4.44 from 5 reviews Add A Review
SynthMaster 2

Reviewed By Milkman [all]
July 5th, 2023
Version reviewed: 2.9.16 on Windows

After nearly 2 years of experience with Synthmaster 2 and with the dev, KV331, I have decided to revise my review and drop it to 1 star. I wont be working with KV331 any longer.

Synthmaster 1 and 2, and soon 3, sound very nice and offer a lot of presets. When I originally purchased SM2, I knew it was buggy and had many longstanding issues (you can read about those issues on the KVR forums, inside the KV331 forum), but I chose to support the dev and try it out anyway.

I immediately noticed that SM2's modwheel did not work unless I clicked it onscreen, and the "midi learn" feature would crash the plugin in Cubase. Manual assignment within SM2 also failed. I tried various ways to fix this including reaching out to the dev, but I was never able to solve it and the dev ignored my questions.

Recently the dev emailed all customers about Synthmaster3, and offered a new upgrade deal. I considered this, but wanted to make sure the modwheel issue was resolved before spending more $$, so I asked questions on the dev's forum here on KVR. The issue was denied, it was blamed on Bitwig (I started using Bitwig 6 months ago), and then finally it was very curtly blamed on VST3.

In the end, I have no idea if this issue still exists in SM3, but it certainly exists in SM1 and 2 and I am not interested in working with this developer anymore. The responses to my questions and then later to my frustration were inappropriate and dishonest, and I dont have time or patience for dishonest devs. Im done with KV331.

Read Review
SynthMaster 2

Reviewed By Faydit [all]
April 27th, 2022
Version reviewed: 2.0 on Windows

One of the best sounding and most flexible synthesizer plugins, which I know.

Almost too many features, but of course you do not need to use them all, alone the existing presets sound very good. I've also bought some more vintage based expansions, which also up to now did not disappoint me.

More than fair price for the quality and features.

Read Review
SynthMaster 2

Reviewed By vata44 [all]
November 3rd, 2021
Version reviewed: 2 on Windows

I absolutely love this synth. I am always drawn to it when looking for a sound or to design a sound. I love the layout, sound, and flexibility. It is quite deep. It allows .WAV file imports, but the only thing is it missing imo is a rompler library with a real Piano and Strings. I know this isn't the aim of the product so I am not disappointed, but if they added this in the future it might be the only thing I ever used.

I think the effects section is great as well, the only thing I would hope for is a ValhallaShimmer-esque reverb.

I like that you can use the Synth as an FX unit as well, but it would be helpful if they had a different GUI for the FX only version. I understand that would probably be a tremendous amount of work, but it would really set it apart and make the FX version less cluttered and more usable.

If you want to buy a virtual synth, I would put this HIGH on my list. I own Diva, Zebra, Lush 101, Korg, and the whole NI suite, but I always come back to Synthmaster and Synthmaster One.

Response from kv331 from KV331 Audio on November 4th, 2021

Hi there, thank you very much for encouraging words! Don't forget to download our latest v2.9.10 update, it has a serious usability improvements, critical bug fixes, and new content (factory presets and skins), and it is the most stable version to date.

Read Review
SynthMaster 2

Reviewed By Triplefox [all]
August 26th, 2021
Version reviewed: 2.9.9 on Windows

I just upgraded from Synthmaster One + Synthmaster Player to the Everything bundle and have had the prior two for some years and often bring them out.

Synthmaster is a true "jack of all trades, oftentimes better than master of one". It's established and stable, and its utility as a preset box is enormous, even before getting the expansions. I readily admit to rarely deep-diving the UI, because, while I've been toying with filters and envelopes for 20 years at this point, the presets basically always have something I want. The licensing is, relative to the scale of the product, very hassle-free, unlike most of the big players in plugins. Not only does it have presets, but it also has macro knobs for each preset, so no extra configuration step is needed to get some expressive playing. These are all qualities that are boring yet important when one's attention moves away from noodling and towards quickly producing tracks. Synthmaster plus your multisample rompler library of choice is a fine instrument palette, and anything on top is getting into extra-credit territory and is relatively less important than the studio recording work and effects plugins in making a well-rounded production.

The sound quality is something I've sometimes dinged Synthmaster for and it did keep me away in the past - in a head-to-head demo it's just a little more polite and thin than competitors, on average - but it has only gotten better with time and it's always had a lot of tweakability, and it successfully avoids the trap of glossy over-effected presets that you have to immediately strip down to their bare bones to actually use. For the most part, you can bring quality up to par by cranking the engine quality and doing a little more mixing work to give it some distortion, EQ, transient punch or a touch of reverb. It's just not quite on the level of the high-end analog modellers when doing exposed, filter-intensive patches(yet), and that's the kind of thing that, if it really does concern you that much, you may just want to get real analog gear instead.

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SynthMaster 2

Reviewed By ksertb@hotmail.com [all]
August 3rd, 2021
Version reviewed: 2 on Windows

It is amazing! It can do almost each and every synthesis (hence the name Synthmaster) and the workflow is great. Just try to imagine the sound you want and simply count on Synthmaster. %99 you get the sound you like with high quality.

It also comes with so many presets, more than you can imagine.

Bear in mind that it very affordable in the competition. So please check it out. You will not regret it.

Read Review

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