CubuSynth - Engine (DIY)

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DIY version of the CubuSynth Engine

Difficulty Level: 9/10
Build Time: 10~16 hours
Very high component count, tight placement and transistors with small footprint (<0.7mm solder wire recommended)
Component count: 389

Key features

- 2 VCO cores (voices)
- 4 simultaneous wave forms per voice + 4 Modulation Outputs
- Wavefolder per voice
- Pulse Width modulation
- Linear and exponential FM inputs
- 1 V/oct tracking stable over up to 10 octaves
- Chaos generator with external clock input
- Complex internal normalized modulations

Specifications

- Size: 24HP x 3U / 121mm x 129mm
- Depth: 35mm (measured from the front panel)
- Max. Current Draw:
+12V: +65mA
-12V: -50mA
+5V: +11mA

Read Articles
Learn more about Engine

The CubuSynth Engine is a dual analog VCO with wave shaping functions, internal modulations and a chaos generator.
It is based around the 3340 chip and features 4 Waveforms + Wavefolder per VCO and 4 Modulated Outputs, all simultaneously.
The CubuSynth Engine can work as 2 independent VCOs, or as one complex FM oscillator.
With its inernal "Chaos Engine" it creates semi-random voltages, generated by the 2
oscillator cores. This signal is then normalized to the CV inputs for Pulse width
modulation and exponential FM.
Each of the 2 VCOs offers a switch to select one of the 4 waveshapes to be used by the
wavefolders, and the linear FM input normalisations.

Downloads

Modulargrid

GitHub

PCB+Panel pack contains:

 - Main PCB
- Control PCB
- Switch Adapter PCB
- Front Panel

Special Components pack contains:

 - 2P4T Rotary Switches x2
- 2P4T slide switch
- 8x colored LEDs
- 2N5457 JFET Transistor
- CD4094 (8-Stage Shift-and-Store Bus Register)
- Vintage Polystyrene Capacitors x2

The Full DIY contains all components and PCBs to build the Module