SynthMaster One

SynthMaster One is a wavetable software synthesizer for desktop and iOS. It is best suited to producers who want to shape and extend wavetable sounds in a DAW or as a standalone instrument. Desktop is the stronger choice for deeper use; the iPhone app offers a free but narrower starting point.

Overview

KV331 Audio pairs an approachable workflow with a desktop engine that reaches beyond preset playback. Each desktop instance combines oscillators, filters, envelopes, LFOs, a sequencer and effects, while support for imported wavetables and MIDI patterns gives sound designers ways to bring their own material into the instrument.

The mobile app retains the wavetable focus and can run as an AudioUnits V3 instrument in compatible iOS DAWs. It is not a like-for-like desktop replacement: it has 16-voice polyphony and 650 presets, against 32 voices and 1,250 presets on desktop.

Key features

Expandable wavetable library: Import wavetable files or place them in the SynthMaster One Waveforms folder. That makes the instrument more useful to producers who want to work with their own waveforms instead of relying only on the included library.

Desktop sound engine: Each instance has two oscillators, two sub oscillators, two filters, four ADSR envelopes, two LFOs, a 16-step arpeggiator/sequencer and 11 effect types. The breadth supports sound shaping and sequencing in one instrument, though this full engine is paired with the desktop's higher price.

MIDI patterns and tuning: Drag MIDI patterns into the arpeggiator and use Scala tuning files. These features suit users who want to incorporate existing patterns or non-standard tuning into their workflow.

Preset and data sync: KV331 Audio says presets, waveforms, samples, favourites and MIDI programs can be synchronized across machines and platforms. That is useful for moving a working library between compatible setups.

iOS DAW and file support: AudioUnits V3 support allows multiple instances in compatible DAWs such as GarageBand, Cubasis and Beat Maker. On iOS 11 or later, the Files app can import and export presets, waveforms and scales.

Pricing

The free SynthMaster One iPhone Only App costs nothing. It runs on iPhone, not iPad, and includes 650 presets with 16-voice polyphony. It is a sensible way to explore the instrument without paying, but the device restriction and reduced voice count make it a limited choice for users who want a larger mobile setup.

The SynthMaster One iOS Universal App costs $9.99, paid once and runs on iPhone and iPad. It removes the iPhone-only restriction, but remains at 16 voices and 650 presets, so it does not match desktop capacity.

The SynthMaster One desktop version costs $49, paid once for Mac and Windows. It includes 32-voice polyphony and 1,250 factory presets, making it the best fit for producers who want the fuller sound engine and library. The desktop demo includes 650 factory presets, disables preset saving and stops working after 15 minutes; it is useful for an initial evaluation, but not sustained work.

Platforms

SynthMaster One is available for iOS, macOS and Windows. The desktop version runs as a VST instrument on Windows and Mac, an Audio Unit instrument on Mac, and a standalone application on Windows. On iOS it runs as an Audio Unit instrument, with multiple instances supported in compatible DAWs.

Who it's for

Choose SynthMaster One if you want a wavetable instrument with an expandable waveform library, detailed desktop sound engine and MIDI-pattern workflow. The iOS versions fit users who want the same broad synthesis focus on a phone or tablet, provided they accept fewer voices and presets. If you need iPad support without paying, the free iPhone-only edition is not the right fit; if you need the desktop voice count and preset library, neither iOS app is a substitute.

Pros and cons

Pro: Desktop instances combine oscillators, filters, modulation, sequencing and 11 effect types, giving sound designers a broad toolkit in one instrument.

Pro: Wavetable imports, Scala tuning and drag-and-drop MIDI patterns support workflows that go beyond the factory presets.

Pro: The free iPhone app provides a no-cost route into the instrument's wavetable approach.

Con: The iOS editions have half the desktop voice count and 600 fewer presets, a material reduction for users who want the full desktop capacity.

Con: The free app runs only on iPhone, while the iPad-compatible universal edition costs $9.99, paid once.

Con: The desktop demo cannot save presets and stops after 15 minutes, limiting its usefulness for extended evaluation.

Alternatives

Browse software synthesizers to compare other instruments. For a free, open-source option that runs on Linux, macOS, the web and Windows, consider Cardinal; its builds include built-in modules, but adding modules to an existing build is not possible.

DefleMask is another alternative. Vital may suit users seeking a free synth with full synth features, 75 presets and 25 wavetables, or a $5 a month subscription with store credit and subscriber-only packs. Choose VCV Rack for a free, open-source modular route, or Dexed for free software under GPL v3. Repro is a paid alternative at €149, paid once, with two synths in one product; it requires host software or a DAW, and its demo emits crackling sound. Helm is a free or pay-what-you-want standalone or plugin option for Linux, Mac OSX and Windows. Sonic Pi is free and open source for Linux, macOS, the web and Windows.

Verdict

SynthMaster One is a strong fit for producers who want desktop wavetable sound design with imported waveforms, MIDI-pattern support and a substantial built-in engine. Its desktop edition is the clearest recommendation for that work; choose the free iPhone app to try the mobile version at no cost. Look elsewhere if you need an iPad app for free or a mobile edition with desktop-level voice count and presets.