This chapter provides an overview of VCV Rack. VCV Rack is a standalone software, meant to emulate a modular Eurorack system. It can also host VST instruments employing a paid module called VCV Host. Right-clicking on an empty portion of the rack provides the module browser. Core modules are the only modules provided with Rack by default. The AUDIO module is the interface to the outer world. It allows signals in and out the rack. A sound card and audio driver must be selected. As any good electronics engineer or practitioner should have experience with the oscilloscope, VCV Rack fans and developers should know how to properly observe signals using an oscilloscope module. The paid VCV modules have a lot of cool examples offering a graphical user interface similar to popular DAW plugins.