SynthMaster is a semi-modular software synthesizer and effect plug-in in VST, Audio Units and RTAS formats, developed by KV331 Audio.

SynthMaster features many different synthesis methods including VA, Additive, Wavetable, Wavescanning, Phase Modulation, Frequency Modulation, Pulse Width Modulation, Ring Modulation, Amplitude Modulation, Physical Modeling and SFZ Sample Playback synthesis. It has multi-synthesis oscillators, analog modelled/digital filters, flexible effects routing with 11 types of high quality effects and a massive modulation architecture with 95 separate modulation sources and 650+ modulation targets.