Every so often I discover a piece of music software that makes me giddy with the possibilities it presents. That’s what I feel about VCV Rack. It presents the on-screen equivalent of a Eurorack modular. It has a large number of useful modules, some actually based on popular Eurorack hardware modules. It has a community of 3rd Party developers who are constantly adding new modules to the collection. And the application and most of the modules available for it are open source, supported by an enthusiastic developer community.

We don’t really need VCV Rack. There’s Reaktor, Max/MSP, Pure Data, and a number of other tools. Propellerhead Reason also uses a rack & wires visual design, but most of it’s rack devices are higher-level objects than those presented in an actual modular, real or virtual.

What makes VCV Rack fun to work with is that it doesn’t have (as e.g. Max & Reaktor) a distinction between programming and presentation. There’s no “under the hood.” You insert modules and wire them together. There’s nothing wrong with Reaktor and Max, they just require more actually programming and debugging to get something working. I write code for a living, so when I want to make music, I don’t want to think like a programmer any more.

I’ve also found it very stable, though the documentation on using the user interface is lacking. Some tips:

To wire an output that already has a wire plugged into it, hold down Ctrl (Windows/Linux) or Option(Mac)
When you right click to add a mod...