Intellijel Rubicon

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.

The Rubicon is an analog triangle core VCO that is capable of thru-zero frequency modulation. It is a feature packed VCO with multiple simultaneous waveform outputs, including waves that are multiples or divisions of the base frequency.

Very impressive! I was making quite complex patches with modules cross modulating each other and the results were very close to what I get on my real hardware.

Danjel van Tijn, founder of Eurorack manufacturer Intellijel

In Short

• 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