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SynthMaster 3
What it is
SynthMaster 3 is a modular software synthesizer from KV331 Audio, available as a plug-in and standalone app for Windows and macOS. Its sound-generation options include VAnalog, additive, vector, wavetable, granular, phase and frequency modulation, phase distortion, pulse width and ring modulation, physical modeling, and SFZ sample playback. Each instance can contain up to 16 layers; each layer can hold up to 16 modules and 32 modulation sources. The instrument includes 3,150 factory presets, plus waveform, wavetable, and multi-sample editors. Multi-samples can be imported from WAV or AIFF files and exported in SFZ format. Each layer has a separate MIDI output channel for routing arpeggiator or sequencer MIDI to different DAW tracks. Plug-in formats are VST2, VST3, AudioUnits, and AAX. The SynthMaster 3 plan is $99, paid once and includes 6 free expansions. A free player and demo are also offered; the demo stops after 30 minutes, adds noise every minute, and limits certain exports.
For and against
For
- Includes 3,150 factory presets.
- Supports four plug-in formats and standalone use.
- Each instance can contain up to 16 layers.
- Imports WAV and AIFF multi-samples.
- Layers provide separate MIDI output channels.
Against
- Demo stops after 30 minutes.
- Demo emits noise every minute.
- Demo disables WAV wavetable and SFZ multi-sample export.
- Full plan costs $99, paid once.
The verdict
SynthMaster 3 combines modular layering, varied synthesis methods, and sample-editing tools in one instrument. The free player and demo are available, while the full SynthMaster 3 plan is $99, paid once.
Who it suits
It suits musicians and sound designers looking for a modular synthesizer with multiple synthesis methods, sample editing, and DAW plug-in or standalone use. The free player and demo offer ways to explore it, though the demo has usage and export limits.
Plans and prices
SynthMaster 3
Includes 6 free expansions · VST2/VST3/AudioUnits/AAX
Read 15 Oct 2026 · kv331audio.com
SynthMaster 3 Free Beta
One layer · one oscillator/filter/waveshaper · 4 modulation sources · 16-voice polyphony
Read 15 Oct 2026 · kv331audio.com
SynthMaster 3 upgrade from SynthMaster 2
Requires SynthMaster 2 license
Read 15 Oct 2026 · kv331audio.com
SynthMaster 3 upgrade from SynthMaster One
Requires SynthMaster One license
Read 15 Oct 2026 · kv331audio.com
SynthMaster 3 upgrade from SynthMaster 3 Player
Requires SynthMaster 3 Player license
Read 15 Oct 2026 · kv331audio.com
Everything Bundle
SynthMaster One, 2 and 3 · 60+ expansion banks · 8,000+ presets · current and future banks
Read 15 Oct 2026 · kv331audio.com
Upgrade from SynthMaster 2
For SynthMaster 2 owners
Read 4 Oct 2026 · kv331audio.com
Upgrade from SynthMaster 3 Player
For SynthMaster 3 Player owners
Read 4 Oct 2026 · kv331audio.com
Upgrade from SynthMaster One
For SynthMaster One owners
Read 4 Oct 2026 · kv331audio.com
On the record
- API and SDK
- The inspected official product, download and FAQ pages document plug-in formats and user installation but provide no public API or SDK documentation.kv331audio.com · read 15 Oct 2026
- Arpeggiator and sequencer
- Every layer has its own arpeggiator and sequencer with randomized trigger, hold and slide values and a separate MIDI output channel for DAW routing.kv331audio.com · read 15 Oct 2026
- Company founding
- KV331’s About page says Bulent Biyikoglu founded KV331 Audio in 2004.kv331audio.com · read 15 Oct 2026
- Company headquarters and size
- LinkedIn lists KV331 Audio as privately held, headquartered in Çankaya, Ankara, with 2–10 employees and a 2012 founding date.in.linkedin.com · read 15 Oct 2026
- Company legal name
- The official footer and EULA identify the company as KV331 Yazilim Limited Sirketi, also rendered as KV331 Yazilim Ltd. Sti.ec.crypton.co.jp · read 15 Oct 2026
- DAW routing
- Each layer has its own MIDI output channel so arpeggiator or sequencer MIDI can be routed to different DAW tracks.kv331audio.com · read 4 Oct 2026
- Demo limits
- The paid-feature demo stops after 30 minutes, adds noise every minute, restricts reopening saved presets to paid instances, disables SFZ/WAV exports and uses 13-bit factory samples.kv331audio.com · read 15 Oct 2026
- Documentation depth
- KV331’s downloads page exposes a SynthMaster 2.8 manual, while an independent 2026 report says written SynthMaster 3 documentation was absent and an unofficial manual was created.irzu.org · read 15 Oct 2026
- Editing views
- Layer, Track and Mix views provide single-layer editing, multi-layer performance sequencing and effects mixing.kv331audio.com · read 15 Oct 2026
- Editors
- Waveform, wavetable and multisample editors support freehand or curve editing, WAV wavetable export and SFZ multisample export.kv331audio.com · read 15 Oct 2026
- Factory content
- The current official product page lists 3,150 factory presets created by named sound designers.kv331audio.com · read 15 Oct 2026
- Factory presets
- The product page says SynthMaster 3 includes 3150 factory presets.kv331audio.com · read 4 Oct 2026
- Formats
- Desktop plug-in formats are VST2, VST3, AudioUnits and AAX.kv331audio.com · read 15 Oct 2026
- Free beta limits
- The October 2026 Free Beta is limited to one layer, one oscillator/filter/waveshaper, two mods, one operator, four modulation sources, 16 matrix entries, 16 voices and eight-voice unison.kv331audio.com · read 15 Oct 2026
- Free demo
- The demo stops after 30 minutes, emits noise every minute, and disables WAV wavetable and SFZ multi-sample export; demo presets can only be opened in the paid plug-in.kv331audio.com · read 4 Oct 2026
- Free Player
- KV331 Audio provides SynthMaster 3 Free Player downloads for Windows and macOS.synthmaster.com · read 4 Oct 2026
- Granular oscillator
- The granular oscillator reaches 16 voices with up to 32 grains per voice, or 512 grains per oscillator, with per-voice spreading and randomization.kv331audio.com · read 15 Oct 2026
- Installation footprint
- The June 2026 demo downloads are about 1.0 GB for Windows and 1.1 GB for macOS.kv331audio.com · read 15 Oct 2026
