# SynthMaster 2 — Power Synth

> Award-winning software synthesizer for iOS with extensive sound design features. (iPhone/iPad app by KV331 Audio.)

- Source: https://appshunter.io/ios/app/synthmaster-2/id1566704584 (this page in markdown: same URL + `.md`)
- Developer: [KV331 Audio](https://appshunter.io/developer/944155925)
- Category: Music
- Price: $4.99 with in-app purchases (on sale, was $14.99)
- Rating: 4.76/5 from 451 App Store ratings · 111 written reviews indexed
- Age rating: 4+
- Requires: iOS 15 · 918 MB
- Languages: English
- Released: 2021-06-22
- Data updated: 2026-08-30
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/synthmaster-2/id1566704584/reviews.md

## What is SynthMaster 2?

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. 

Oscillators:

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:

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.

Filters:

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.

Arp/Sequencer:

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

Effects:

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.

## Key features

- Multiple oscillator modes (Basic, Additive, Wavetable, Vector)
- Extensive modulation architecture
- 6 filter categories
- Import custom wave files
- 1000+ factory presets
- Standalone app and AUv3 plugin

## Pricing and in-app purchases

Base price: $4.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Club Sequences Vol.1 | $2.99 | one-time |
| Desktop Presets Upgrade | $4.99 | one-time |
| All Expansions Bundle | $29.99 | one-time |
| BigTone Analog Basics 02 | $2.99 | one-time |
| BigTone Analog Basics | $2.99 | one-time |
| BigTone Signature Sounds Vol.1 | $2.99 | one-time |
| NU Sounds of the World | $2.99 | one-time |
| Historical Synth Giants Vol.4 | $2.99 | one-time |
| Historical Synth Giants Vol.1 | $2.99 | one-time |
| Historical Synth Giants Vol.2 | $2.99 | one-time |
| Japan Vintage | $2.99 | one-time |
| NatLife Future Bass Sounds | $4.99 | one-time |
| Danyella EDM Expansion Vol.1 | $4.99 | one-time |
| Dawn of Electronic Music Vol.1 | $4.99 | one-time |
| Dawn of Electronic Music Vol.3 | $4.99 | one-time |
| Rob Lee EDM Expansion Vol.3 | $4.99 | one-time |
| Natlife Disco Funk | $4.99 | one-time |
| Historical Synth Giants Vol.3 | $2.99 | one-time |
| Dawn of Electronic Music Vol.2 | $2.99 | one-time |
| Nori Ubukata Art Rock Basics | $2.99 | one-time |


## What do users think of SynthMaster 2?

Overall sentiment: positive

**Pros**

- 🚀 Best synth on iPad
- 👍 Delicious sound
- 👍 Tremendously powerful synth
- 👍 Great synth with complex possibilities and great sound(s)
- 👍 Perfeito
- 👍 More synth than you'll ever need
- 👍 Amazing app
- 👍 Incredible
- 👍 Génial
- 👍 Favoloso!!!

**Cons**

- 🐛 Auswahl der Modulationsquellen funktioniert nicht richtig
- 🐛 Echt schlecht
- 🐛 Broken Preset System for a powerful synth
- 🐛 Please fix the OSC behavior on Square and Saw
- 🐛 Preset issues
- 🐛 Preset management is a buggy nightmare
- 🐛 Great sounding IOS synth, but...
- 🐛 No tempo/bpm
- 🐛 Basic functionality is broken
- 🐛 Consistent audio dropouts

**Commonly reported bugs**

- Presets not loading correctly
- Modulation not working after loading project
- Skin resets to default
- App crashes frequently

**Most requested features**

- Pitch bend/glide for imported samples
- Integration with AUM audio mixer

## Recent user reviews (10 of 111)

All indexed reviews: https://appshunter.io/ios/app/synthmaster-2/id1566704584/reviews.md

### 5/5 — Sean

*2026-07-27, version 1.1.2*

Truly the go to synth on iOS gives you access to a comprehensive set of features nothing else will. Complicated arps, loading your own samples, rich filters, massive amounts of modulation, rich analogue presets, huge selection presets. I’m not the most techy person so can be a little confused but this synth is a world not a toy. Looking forward to 3 arriving…..

### 5/5 — Nice

*2026-06-30, version 1.1.2*

Very cool, lush sounds and lots of variations and ways to manipulate sounds to one’s liking , thank you for this

### 4/5 — SynthMaster 2 not recording inside of DAW

*2026-06-12, version 1.1.2*

Hi there I am having issues since the new up date on SynthMaster 2 it is crashing often only started recently since last update which would of been week ago now n when loading my project  with my DAW the sounds I saved on SynthMaster with the project do not save n the sounds chuck me back in to the  a category of bank sounds so I lose the sounds saved in project if this makes sense plz can you fix this plz thanks

### 5/5 — Powerful Powerful Synth

*2026-06-08, version 1.1.2*

Update: Developer fixed some issues with preset system. I’m happily enjoying this versatile synth again. It is in my all time top ten synths on iOS. I love it!

### 4/5 — Great sounding IOS synth, but…

*2026-06-05, version 1.1.2*

It’s a great sounding synth, but it’s totally broken when it comes to round-trip functionality in Logic between iOS and Mac. So uninstalled…
In response to dev reply…. Yes you’re right, my rating was a bit harsh, so I’ve upped it to 4 stars.

### 3/5 — Can’t use in AUM

*2026-05-16, version 1.0.22*

I have SynthMaster 1, 2 and SynthMaster 3 player.. they all sound great and are fabulous synths, but only SynthMaster 1 works in AUM, why is that. AUM is one of my primary work environments and is really frustrating to not be able to use the newer versions a particular synth in an environment that worked on the first version. Did you piss off the AUM folks and they won’t let you in anymore?

### 5/5 — Best synth on iPad

*2025-12-24, version 1.0.22*

Simply the best synth I own on iOS, I own a bunch korg, Zenbeats and a whole lot of iOS synths but this one brings the closest desktop sound to my ear and I am all smiles, thank you! Btw grab the desktop presets too, you won’t regret, this is a keeper! :)

### 5/5 — Toller Synth mit komplexen Möglichkeiten und super Sound(s)

*2025-12-20, version 1.0.22*

Viele abwechslungsreiche und gute Presets als Ausgangspunkt. Wenn man möchte, kann man sehr in die Tiefen des Sounddesigns einsteigen mit diesem Synth. Sehr gut die Möglichkeit, dass man nach Registrierung sogar seine bereits für die Mac/PC-Version gekauften Soundsets auch für die iOS-Version herunterladen und nutzen kann ohne weitere Kosten - ganz komfortabel vom Browser aus. Eigene Sounds lassen sich ebenfalls synchronisieren. Das erleichtert es doch enorm, zwischen mobil und Desktop zu arbeiten. Freue mich, dieses nette Plugin auch mobil dabei haben zu können!

### 5/5 — Perfeito

*2025-12-14, version 1.0.22*

Sintetizador incrível

### 5/5 — More synth than you’ll ever need

*2025-11-23, version 1.0.22*

Hands down the most comprehensive synth app around. They cover any and every genre. You can either shop through the expansions to match your tastes, or just buy the affordable bundles and browse through those great presets to your hearts content.

## Frequently asked questions about SynthMaster 2

### What does SynthMaster 2 do?

SynthMaster 2 is a powerful software synthesizer for iOS that allows users to create a wide range of sounds. It functions as a standalone app and an AUv3 plugin, offering extensive sound design capabilities for music production and sound design.

### What are the key features of SynthMaster 2?

Key features include multiple oscillator modes (Basic, Additive, Wavetable, Vector), a comprehensive modulation architecture with various sources, six filter categories, the ability to import custom wave files, and over 1000 factory presets. It also supports standalone operation and AUv3 plugin functionality.

### How much does SynthMaster 2 cost?

The app itself is free to download. Additional presets and expansion banks can be purchased through in-app purchases. The 'Desktop Presets Upgrade' adds all factory presets, and the 'All Expansions Bundle' includes all current expansion banks.

### What devices is SynthMaster 2 compatible with?

SynthMaster 2 runs on iPads with iOS 11 and above. It supports native resolutions for 9.7, 11, and 12.9-inch iPads and offers separate interfaces for the AudioUnit plugin.

### Who is SynthMaster 2 for?

This app is designed for musicians, sound designers, and electronic music producers who want a versatile and powerful synthesizer on their iOS devices. It's suitable for both beginners exploring sound creation and experienced users looking for advanced synthesis tools.

## Version history (last 5 releases)

### 1.1.2 — 2026-06-03

BUG FIXES:

1. When a file is being moved, the destination file should not be deleted if source doesn't exist
2. When the FX tab is shown, the correct global/layer fx should be made visible according to user's selection of Layer1/Layer2/FX Bus 1/FXBus 2
3. When loading MIDI Programs from MidiPrograms.xml file, presets should be searched by name as well

### 1.0.24 — 2026-05-29

NEW FEATURES:

1. Added Import/Export MIDI Mappings
2. Added "Map CC74 to CC1" setting to Settings Dialog
3. When user runs the AUv3 before the standalone, a warning message is displayed now

BUG FIXES:

1. SynthMaster2AU might crash during instantiation
2. FavouritePresets.txt file should be moved to user documents folder
3. MidiPrograms.txt file should be moved to user documents folder
4. When global parameter MIDI Mapping is added/removed, all AUv3 instances should be notified

### 1.0.22 — 2024-12-19

Fixed a bug that causes slow loading of some presets.

### 1.0.21 — 2024-01-22

fixed SynthMaster 2 Audio Unit not being displayed on Logic Pro

### 1.0.20 — 2024-01-18

fixed the crash that occurs on devices prior to iOS15

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## More apps by KV331 Audio

- [SynthMaster Player](https://appshunter.io/ios/app/synthmaster-player/id944155926)
- [SynthMaster One](https://appshunter.io/ios/app/synthmaster-one/id1254353266)
- [SynthMaster One for iPhone](https://appshunter.io/ios/app/synthmaster-one-for-iphone/id1490902617)
- [SynthMaster 3 Player](https://appshunter.io/ios/app/synthmaster-3-player/id6757864669)

All apps by KV331 Audio: https://appshunter.io/developer/944155925

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*