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RUBICON

Thru Zero fm triangle core vco

Not long after David Dixon finished the Dixie design he began working on a totally novel approach to implementing tzfm (thru zero frequency modulation). After almost a year of experimenting and many pcb revisions later we are pleased to present what is surely David’s masterpiece as far as analog vco design is concerned.

The Rubicon is packed with the following features:

  • triangle core
  • switchable linear and (for the first time in any module) exponential tzfm
  • linear index vca for dynamic control of tzfm depth
  • symmetry control (full cw is normal, full ccw gives reversed waveforms, centered the vco is at 0 hz) with vc input
  • 12 primary waveform types: sine, sigmoid, double sigmoid, triangle, saw, double saw, zigzag, square, pulse (center modulated), pulse (edge modulated), double pulse
  • suboctave circuit (similar to the one found on the roland sh-101) with -1 and -2 octaves (suboctave output is affected by fm just like the main signals.)
  • soft sync (aka 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)
  • pwm and exp fm with dedicated attenuators.

Wide frequency range:

  • hi range (vco): 1 hz to 24 khz
  • lo range (lfo): 0.01 hz (100 seconds) to 240 hz

Precise tracking within 0.1% over 8 octaves

18hp and skiff friendly

Other modules by intellijel designs | uStep v.2 | SPOCK | FLIP FLOP | BUFF MULT | MULT | QUAD INVERT | UNITY MIXER | uScale v.2 | uMod II | uAtt | Azimuth 2 | HexVCA – discontinued | Mutagen – discontinued | Korgasmatron II | Korgasmatron II Expander | uFade | uVCA v.1 | Dixie | DR. OCTATURE II | Plog | uFold II | Audio Interface II | Dixie II | Dixie CTRL | Quadra | Quadra expander | TRIATT | PLANAR | uVCF | uJack | uVCA II | Linix | Mutamix | Dubmix | Dubmix Aux Expander | Dubmix Mini Expander | Atlantis | Metropolis | Dual ADSR | OR | Springray | Springray reverb tank – small | Springray reverb tank – medium | Springray reverb tank – large | Polaris | Cylonix Shapeshifter | Dixie II+ | TPS80W-A Triple Power Supply | TPS80W-B Triple Power Supply | TPS30W MINI Triple Power Supply | TPS30W MAX | 7U Case | 7U case Joiners (pair) | 4U Case 42HP with TPS30W MINI and Meanwell 40W PSU | 4U Case 84HP with TPS30W MAX and Meanwell 40W PSU | 4U Case 104HP with TPS30W MAX and Meanwell 60W PSU | Cylonix Rainmaker | uMIDI