Oakley VCO Controller

Issue 1 PCB + SOCK8 PCB

As of 2026 synthCube will begin supporting and distributing Oakley Modular projects.

As of 15 Febraury 2026 we have confirmed and updated the BOM and reduced the prices for the PCB set, kit and assembled modules.

The full kit inclues the MOTM panel, 2-PCB set, all PCB and panel parts, name-brand Alpha and Switchcraft pots and jacks, mounting hardware, and an MOTM power cable. 

“The Oakley VCO Controller is a 1U wide module designed to function as a master controller for two or more VCOs. The basic premise of this module is to make it easy to control multiple oscillators. Quite often you will require simple vibrato of two or more VCOs. Normally this is done by patching one LFO (low frequency oscillator) to your VCOs via a multiple. This uses up a minimum of three patch leads for two VCOs and the vibrato depth needs to be set individually on each VCO. With this module the internal sine wave LFO is added directly to the VCO's control bus, or by using two of the output sockets. One pot controls the depth of the LFO for both or more VCOs. The LFO may be overridden by inserting a jack into the CV IN socket on the module thus allowing other CVs to control multiple VCOs simply. The VCO Controller also features an inbuilt VCA (voltage controlled amplifier) module. This allows the internal LFO, or any external CV, to be controlled by another CV. This CV may be aftertouch or modulation wheel outputs from your midi-CV interface. Thus, vibrato depth can be controlled with your keyboard or keyboard's wheel or lever. Only one patch lead is required to add touch sensitive or wheel controlled vibrato to your patches – normally this would require a minimum of 2U of rack space, a multiple, and a whole bunch of patch leads. The VCA within this module can also be used separately as a ordinary VCA should you not wish to use the other features in the module at any time. Also available are two octave switches. These affect the two keyboard control voltage (KCV) outputs of the module individually. Thus each VCO, or VCO bank, can be raised or lowered by one octave at a flick of a switch. Each KCV output uses a low impedance cable driver to ensure no droops with long signal runs and multiple loading. Although this module was designed to work with the Oakley bus, which pipes around KCV and gate signals around your modular, the input and output sockets on this module can be assigned different purposes so as to suit individual requirements. VCA control input is optionally low pass filtered so as to reduce stepping artefacts from midi generated CVs. This low pass filtered output is available via the VCA CV OUT socket so you can use it to control other modules. The internal LFO outputs are available individually from the front panel as both sine wave (+/-5V) and square wave (+5V, 0V).”