VCV Rack is a Eurorack modular synthesizer simulator.
VCV Rack is currently available as a VST2 plugin (Rack 2 Pro only) and standalone application.
This is free and open source software.
Key Features
- Multiple modules can be connected to synthesize a sound.
- By default, the software contains several VCOs, LFOs, mixers, and other standard synthesizer modules.
- Connect to other hardware and software by outputting analog CV/gate and digital USB or MIDI signals.
- Cross-platform support – runs under Linux, macOS, and Windows.
Website: vcvrack.com
Support: Manual
Developer: Andrew Belt
License: GNU General Public License 3.0 (note some plugins are proprietary)

VCV Rack is written in C++. Learn C++ with our recommended free books and free tutorials.
Related Software
| Synthesizers | |
|---|---|
| Surge XT | Hybrid polyphonic synth supporting MPE; run as an LV2 plugin, or VST |
| ZynAddSubFX | Realtime software synthesizer with many features |
| Fluidsynth | Synthesizer based on the soundfont2 specifications |
| Geonkick | Synthesizer that can synthesize elements of percussion |
| VCV Rack | Eurorack modular synthesizer simulator |
| Yoshimi | MIDI software synthesizer; fork of ZynAddSubFX |
| Dexed | Multi platform, multi format plugin synth |
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| amSynth | Two oscillator software synthesizer; subtractive synth topology |
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| terminatorX | "Scratch" on digitally sampled audio data |
| Qsynth | Qt GUI interface for FluidSynth |
| AlsaModularSynth | Realtime modular synthesizer for ALSA |
| Odin2 | VST3, CLAP, AU and LV2 synthesizer plugin |
| Bristol | Vintage synthesizer emulator |
| synthv1 | Old-school polyphonic synthesizer |
| padthv1 | Old-school polyphonic additive synthesizer |
| Borg ER-3 | Portable audio synthesizer / tone generator inspired by the Korg ER-1 |
| Actuate | Subtractive and additive synthesizer, sampler, and granulizer |
| Qwertone | Simple music synthesizer app (like a toy-piano) |
| Six Sines | Compact software synthesizer built around audio-rate inter-modulation |
Read our verdict in the software roundup.
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