SynthMaster One is a software synthesizer from KV331 Audio built on the same engine as its larger sibling SynthMaster, with a simplified layout and a factory preset library.
SynthMaster One at a glance
| Developer | KV331 Audio |
|---|---|
| Type | Instruments / Synth |
| Formats | VST3, VST2, AU, AAX |
| Operating systems | Windows 7 or later, macOS 10.9 or later |
| Apple Silicon | Native |
| Architecture | 64-bit |
| RAM | 2 GB or more |
| Hosts named by the developer | Pro Tools |
| Free trial | Available |
| Price on Plugin Boutique (October 2026) | €8.13 (regular €48.59) |
What SynthMaster One does
The developer states that SynthMaster One shares the engine of SynthMaster but adds features of its own, centered on a simpler layout that keeps sound design approachable. The wavetable and waveform content is broad and forms the basis of the factory presets, and the developer points to video tutorials and audio demos that show how sounds are built.
Version 1.3 adds 200 new factory presets, bringing the total to 1250, and a rich scale library for microtuning. Keyboard mapping can be set to the current scale or to a custom mapping, a piano display highlights the notes of the active scale, and the scale root note and A4 reference frequency are adjustable under the settings tab.
Key features
- Wavetable and waveform library. The library of wavetable and waveform content supplies the source material for the factory presets and for designing new sounds.
- Cloud-based data synchronization. Users can synchronize their data across platforms through cloud-based features added in version 1.3.
- Editing MIDI banks and programs. MIDI bank and program assignments can be edited directly, so presets map to the controller’s program changes.
- Custom preset attributes and styles. Presets can carry custom attributes and styles that users define, and filtering by last modified date narrows the list to recently changed presets.
- Microtuning and scale display. Keyboard mapping follows either the current scale or a custom setup, and the piano display highlights the notes that belong to the scale in use.
SynthMaster One compared with similar plugins
Babylon 2.2 from W. A. Production is a synth for Windows and macOS in VST2, AU and AAX, with no VST3 build listed. Hive 2 from u-he is offered in VST3, VST2 and Standalone and also runs on Linux. AIR Sub Factory from AIR Music Technology targets bass sound and comes in VST3, VST2, AU and AAX for Windows and macOS. Hybrid 3 from AIR Music Technology is a synth in VST3, VST2 and AU for Windows and macOS, with no AAX build listed.
| Plugin | Developer | Type | Formats | Systems | Price |
|---|---|---|---|---|---|
| SynthMaster One | KV331 Audio | Synth | VST3, VST2, AU, AAX | Windows, macOS | €8.13 (regular €48.59) |
| Babylon 2.2 | W. A. Production | Synth | VST2, AU, AAX | Windows, macOS | €5.26 (regular €118.01) |
| Hive 2 | u-he | Synth | VST3, VST2, Standalone | Windows, macOS, Linux | €149.00 |
| AIR Sub Factory | AIR Music Technology | Synth | VST3, VST2, AU, AAX | Windows, macOS | €28.76 (regular €98.18) |
| Hybrid 3 | AIR Music Technology | Synth | VST3, VST2, AU | Windows, macOS | €98.18 |
Price and availability
SynthMaster One was listed on Plugin Boutique in October 2026 at €8.13, reduced from €48.59. A free trial is offered. Prices change often, so the store page shows the current one.
SynthMaster One FAQ
Is there a working serial key or keygen for SynthMaster One?
Serial key and keygen searches are common, and the activation key is the string most often typed with the plugin name.