20 modules in plugin

RPJ Grendel

Quadruple low frequency oscillator, inspired by XAOC Batumi

Low-frequency oscillator

RPJ Lavender

Module with 2nd order LPF, HPF, BPF and BSF


RPJ Easter

Module with 2 resonators


RPJ DryLand

Module with 1st order LPF and HPF


RPJ TheWeb

Module with 2nd order Butterworth LPF, HPF, BPF and BSF


RPJ Gazpacho

Module with 2nd order Linkwitz-Riley LPF and HPF


RPJ Estonia

Estonia is a 1st order High and Low shelving filter.


RPJ Brave

Brave is a 2nd Order Parametric EQ Filter: Non constant Q.


RPJ Essence

Essence is a 2nd Order Parametric EQ Filter with a constant Q.


RPJ LadyNina

LadyNina is a 2nd order SFV (LPF, HPF, BPF, BSF)


RPJ SugarMice

3rd order Butterworth low-pass ladder filter.


RPJ Montreal

Ideal 2nd Order RLC Filters LPF, HPF, BPF and BSF


RPJ BlindCurve

Audio Detector

Envelope followerPolyphonic

RPJ Gaza

Envelope Follower

Envelope followerPolyphonic

RPJ CircularRide

Stereo Delay


RPJ DrillingHoles




Audio player


RPJ FM Pigeon Plink

Many function VCO

OscillatorPolyphonicSynth voice

RPJ Genie

Chaos generator

Sample and hold

RPJ GenieExpander

Display for Genie Chaos generator

Sample and hold


User manual

Author: Robert Kock

Author email:

Donate to Robert Kock

Source code


License: GPL-3.0-or-later

Last updated:


Popularity: 16,499

Browse all modules from RPJ

VCV Library Instructions

  • Download and install VCV Rack.
  • Register for a VCV account and log in using Rack’s “Library” menu.
  • Add or purchase a module on the VCV Library.
  • Open the “Library” menu in Rack, click “Update all” (if updates are needed), and restart Rack once downloaded.
  • Right-click an empty rack space to launch Rack’s module browser to add a module to your patch.

All plugins on the VCV Library are available for Windows, Mac, and Linux. The “major” version (i.e. MAJOR.MINOR.REVISION) must match between Rack and its plugins. For example, Rack 2.* can only load 2.* plugins.

Missing or incorrect information in this database, such as a missing tag? Inform the plugin author(s) using the contact information on their plugin/module page.

Developers: see Adding your plugin to the VCV Library.


Purchasing plugins with the “VCV” brand supports the VCV Rack project. See VCV’s Mission Statement to learn how VCV Rack development is funded.

Prices are in US Dollars.

VCV is only responsible for VCV-branded plugins and does not completely review all third-party plugins. VCV does not provide technical support for third-party plugins. Installing plugins from unknown sources may compromise your computer and personal information.

By purchasing a plugin on the VCV Library, you agree to the End User License Agreement and Refund Policy.

Contact VCV Support for customer support and questions about the VCV Library.