SynthMaster 2 4+

Power Synth

KV331 Audio

    • 4.8 • 320 Ratings
    • $24.99
    • Offers In-App Purchases

iPad Screenshots


*** SUMMER SALE started! Through August Synthmaster apps and in-app purchases are 60% OFF for a limited time! ***

KV331 Audio is proud to announce the availability of their award winning software synthesizer SynthMaster 2.9 on iOS platform. As being the first app developed using KV331 Audio’s new cross-platform UI framework, SynthMaster 2 runs as a standalone app or AUv3 plugin on iPads with iOS 11 and above.

SynthMaster 2 supports native resolutions of various iPad devices. User interfaces are provided for 9.7, 11 and 12.9 inch iPads in 4 different skins (Blue, White, Dark, Proto). Separate interfaces are provided for the AudioUnit plugin as well.

SynthMaster 2 comes with 1000 factory presets designed by world class sound designers such as BigTone, Nori Ubukata, NatLife and Yuli Yolo. Thanks to the comprehensive preset browsing features, users can easily filter presets by author name, bank name, instrument type or preset name and find the sounds that they are looking for.

There’s also an IAP Shop, which lets users purchase additional sounds:

1. "Desktop Presets Upgrade": This IAP adds all factory presets in SynthMaster 2.9, increasing the total preset count to 2000.
2. "All Expansions Bundle": This IAP adds all current 38 SynthMaster preset expansion banks.

Sound Engine:

At the heart of SynthMaster 2’s powerful sound engine lies its oscillators, modulators, and filters.


The oscillators can operate in 4 different modes to generate sound:

1. In Basic mode, the oscillator plays single cycle waveforms or samples. With the Oscillator Unison turned on, up to 8 voices per oscillator can be played.
2. In Additive mode, 8 Basic oscillators can be stacked up to create richer tones.
3. In Wavetable mode, the oscillator can play wavetables with up to 256 frames.
4. In Vector mode, 4 Basic oscillators are mixed in 2 dimensions.


Modulators are simply basic oscillators that can be added to other oscillators or modulate other oscillators’ or modulators’ phases. By connecting modulators to other oscillators or modulators, complex FM tones can be synthesized.

Importing Wave Files into SynthMaster:

While designing sounds, users can easily import wave files into SynthMaster 2. SynthMaster 2 can categorize those files into waveforms, wavetables or multi samples and import them accordingly.


Once the sound is generated by the oscillators it goes through SynthMaster’s filters, which can operate in 6 different categories: Digital, VAnalog, Ladder, Diode Ladder, State Variable and Bite.

Custom distortion can be applied before or after the filters as well.

Modulation Architecture:

SynthMaster 2 features a comprehensive modulation architecture with a wide range of modulation sources:

1. MIDI controls
2. Macros controls
3. 4 ADSR envelopes per layer
4. 4 Multisegmented envelopes per payer
5. 4 LFOs per layer
6. 4 Sequencers per layer
7. 4 Keyscalers per layer

There’s real-time visual feedback that lets users see how modulation sources and targets are changing when a note is being played. This is extremely helpful when designing sounds with SynthMaster 2.

New modulations can be created easily by dragging and dropping a modulation source onto a knob or slider control.

Users can easily see which controls are modulated by a modulation source by clicking on that source. Controls that are being modulated by that source will display modulation amounts. By long pressing a control, the modulation amount can be edited without the need to go through the mod matrix.


SynthMaster features a comprehensive arpeggiator / sequencer with 32 steps. Users can easily create sequences by recording steps one by one.


Each of the 2 layers in SynthMaster has 5 insert effect slots. 13 different types of effects can be instantiated in any of those slots. There are also 2 global effect send busses which can be used to create more complex effect routings.

What’s New

Version 1.0.18

- fixed a bug that causes crash on Logic Pro for iOS

Ratings and Reviews

4.8 out of 5
320 Ratings

320 Ratings

Babble on One ,


During the last app update, I suffered a loss of my prior IAP purchases… I contacted support, and a reply came quickly. I tried the suggestions made to no avail. I sent another email, and was answered just as quickly with a solution. I not only feel that the app is TOP NOTCH, but so is the customer service! It is sad that you cannot rate them any higher than 5 stars! ★︎ ★︎ ★︎ ★︎ ★︎ ∞︎ !

I’ve experienced no problems in SynthMaster Player, SynthMaster One, or SynthMaster Two! I did at first; but the fault was mine, not the app! I’ve enjoyed them all, the soundpacks that I’ve purchased, and found many of the new sounds in all of them (especially the new ones in SynthMaster Two) quite inspiring! Great stuff! Thanks to all for your hard work!✌🏻😎🎹🌴🌞

Reel man ,

Will not run in AUM

Great Synth, great sounds but, it no longer runs in AUM! I have a iPad Pro 5th generation and I’m running 15.5 os software. And it will not load in AUM. It will work only as a standalone synth. I sent tech support a crash report that they ask for and I have not heard from them since. IF YOU CANT FIX IT THEN I NEED A REFUND.


The tech team fixed the loading problem in AUM and it’s working perfect. I’m changing my rating from 1 to 5 stars! Thank You!

goldenlotus12 ,

Top notch

This is an outstanding sounding synth with a great UI. The inclusion of samples is awesome as well. All around an unexpected and impressive update and expansion to an all ready super VST.

However, of note, the presets packs are not loading correctly from past purchases of SynthMaster player and SynthMaster one. Even with restore IAP nothing is transferring for me. So I just bought them all since I had several missing from one and player that said purchasing them in SM2 does not give you access to them in the older apps at present this is a disappointing implementation of presets

In-App Purchases

Desktop Presets Upgrade
Increases factory presets count to 2000
All Expansions Bundle
Contains all 34 SynthMaster expansions
BigTone Analog Basics
BigTone preset expansion
Aiyn Zahev Expansion 1
Trance, house, dubstep and electro presets
Alonso Sound Future Rave
synth sound presets for future rave genre
Club Sequences Vol.1
Frank Neumann preset expansion

App Privacy

The developer, KV331 Audio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

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