Rack is a free software synthesizer developed by VCV. Available format(s): for Windows, macOS.
VCV Rack is the engine powering VCV modules. Add modules, connect cables, edit parameters, and save/load patches. Create generative patches with your mouse, perform with your MIDI keyboard controller, or connect it to your favorite DAW using the VCV Bridge VST/AU plugin (coming soon).
In Rack, control voltages and audio signals are equivalent, so you can modulate parameters with sonic-range VCOs to create customizable FM synths or chaotic wave-shaping oscillators. If you already own a modular synthesizer, you can enhance your setup with an audio interface or a CV-MIDI-CV interface module with Rack’s CV Interface (coming soon).
Find out more at vcvrack.com.
https://vcvrack.com/