Buy Modular Add-On: Intellijel Rubicon, get a free gift with purchase:
This product is an expansion for Softube Modular. If you do not currently own Modular, you can purchase it HERE.

The thru-zero frequency modulation of Rubicon is ideal for experimenting with FM synthesis. Rubicon is an analog VCO design masterpiece, originially created by Dave Dixon with Intellijel. It is a unique Eurorack module, now offered as an add-on module for Modular.
Please Note:
- MODULAR (cross-platform modular synthesizer) is required to run this software!
Features:
- High precision emulated Triangle core
- Switchable linear and (for the first time in any module) exponential TZFM (through-zero FM)
- Linear index VCA for dynamic control of TZFM depth
- Symmetry control (full clockwise is normal, full counter-clockwise gives reversed waveforms, centered the VCO is at 0 Hz) with CV
- 12 primary waveform types: sine, sigmoid, double sigmoid, triangle, saw, double saw, zigzag, square, pulse (center modulated), pulse (edge modulated), double pulse
- Suboctave circuit with -1 and -2 octaves. The suboctave output is affected by fm just like the main signals
- Soft sync (also known as reversing sync) with attenuator
- Hard sync with selectable reset direction (determines if the triangle starts moving up or down after a reset, very useful in LFO mode)
- Pulse-width modulation and exponential FM with dedicated attenuators
- Requires Modular
System Requirements
- macOS Big Sur 11, Monterey 12, Ventura 13
- Windows 10 (64-bit), Windows 11
- Softube account
- iLok account
- Computer with AU, VST, VST3, and/or AAX-compatible DAW host software
- Internet access (for downloading installers and managing licenses)
Supported CPU Families
- Apple macOS computers with Intel Core i3/i5/i7 or Apple silicon (M1 or newer) CPU. Apple silicon is supported natively.
- Windows computers with quad-core Intel Core i3/i5/i7 or AMD quad-core processors with SSE 4.2 support.
- Other Intel processors (Celeron, Pentium, and Xeon) are compatible if they support SSE 4.2 instructions.
Supported Host Software (DAW)
Any 64-bit VST, VST3, AU, or AAX (Pro Tools 11.0.2 or higher) compatible host application should work. However, due to plug-in host differences between DAWs—and our rigorous standards—Softube only officially test their plug-ins and instruments in the most recent versions of Pro Tools, Logic Pro, Cubase, Ableton Live, Studio One, and Reaper. Softube plug-ins are not tested regularly in non-listed systems. They will likely work if the system requirements are met. However, the manufacturer cannot guarantee a solution for issues in unsupported systems.
Softube strongly recommend using VST3, as some of their plug-ins have features that are not present in the older VST format. Supported sample rates: 44.1, 48, 88.2, 96, 176.4, and 192 kHz, in both mono and stereo. The most recent maintenance release of your DAW application is recommended. AAX DSP is not currently in active development. TDM/VENUE/RTAS are no longer supported. See Legacy Installers.
- Softube Modular is required to run this software.
- Make sure that you always use the latest iLok License Manager. It is not included in the Softube installer but can be downloaded from www.ilok.com

Important Note: Spring Reverb is used as the example
Installation Video
Note: Before starting the installation, you are required to create a FREE iLok user ID and install the iLok License Manager.
Please take a look at this Help Centre Guide for more information.
Registration
1. Click 'DOWNLOAD' in your Plugin Boutique Account. This will direct you to the Softube login page.

2. Enter your details > tick the Privacy Policy box > click 'Sign up' to create an account. (If you already have a Softube account, please log in and skip to step 5).

3. Go to your email account > find the Softube registration email > click 'ACTIVATE MY ACCOUNT'. (Your account has now been successfully created)

4. Go back to www.softube.com (you should now be logged in) > click 'MY ACCOUNT'.

5. Click 'REGISTER LICENSE'.

6. Enter the License Code (referred to as serial number on our site) found in your Plugin Boutique User Account > click 'REGISTER LICENSE'.

7. Click 'GO FOR IT!'.

Your product is now registered.
Mac
1. On the My Products page, click 'MAC' > you will be directed to the Mac Installation page.

2. Click 'HERE (highlighted in orange) to start downloading Softube Central.

3. Once it has downloaded, open the Softube Central PKG file > click 'Continue'.

4. Read through the Software License Agreement > click 'Continue'.

5. Click 'Agree'.

6. Click 'Install'.

7. Enter your password > click 'Install Software'.

8. Click 'Close'.

9. Open Softube Central > click 'INSTALL' to install all the necessary iLok licensing components. (This may take a few minutes)

10. Sign in to your Softube account.

11. Your product will now be displayed in Softube Central.

Please note: if it says 'DISCONNECTED' at the top of the window, please go to the settings and click 'RESTART', close Softube Central and then open it again.
Your software is now activated and ready for use within your DAW.

Windows
1. On the My Products page, click 'WINDOWS' > you will be directed to the Windows Installation page.

2. Click 'here' (highlighted in orange) to start downloading Softube Central.

3. Once it has downloaded, open the Softube Central download > click 'Yes'.

4. Read through the Software License Agreement > click 'I Agree'.

5. Softube Central will now open > click 'Install' to download the necessary iLok licensing components.

6. Please wait for the iLok licensing components to download. (This may take up to 5 minutes).

7. Click 'Yes' > the Softube Installer Helper Setup will now run.

8. Click 'Next >'.

9. Read through the License Agreement > click 'I Agree'.

10. Click 'Next >'.

11. Choose the VST file path (we recommend the default location) > click 'Install'.

12. Click 'Finish'.

13. Softube Central has now been successfully installed > click 'START'.

14. Sign in to your Softube account.

15. Click 'INSTALL'.

Your software is now activated and ready for use within your DAW.
