CubuSynth
CubuSynth - VCFA (DIY)
CubuSynth - VCFA (DIY)
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VCFA - Voltage controlled Filter and Amplifier
The CubuSynth VCFA is a multimode VCF with LP,HP and BP modes with integrated VCA, CV control over Frequency, Resonance and Volume.
The CV input for the Frequency features 1V/Oct scaling over about 2~3 octaves. So you can even create plucky melodies
with the resonance in "ringing" mode.
The Gain control can reach a nice, soft saturation.
DIY version of the CubuSynth VCFA
Difficulty Level: 5/10
Build Time: 2 ~ 4 hours
Two PCB-Sandwich, normal component count, easy to solder & assemble
Component count: 115
Key features
- 3 simultaneous outputs for Low Pass, Band Pass and High Pass
- Integrated VCA on input stage
- Input saturation on upper Gain levels
- CV control over Volume, Frequency and Resonance
- Frequency CV scalable for 1V/oct signals (stable up to 2-3 octaves)
- "ringing" appears on upper Resonance levels
Specifications
- Size: 10HP x 3U / 121mm x 129mm
- Depth: 34mm (measured from the front panel)
- Max. Current Draw:
+12V: +14mA
-12V: -14mA
PCB+Panel pack contains:
- Main PCB
- Control PCB
- Front Panel
The Full DIY contains all components and PCBs to build the Module
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I'm not impressed by the finished build. The fall-offs in the frequency response of each filter acts like a step function. For example, on LP, there's no output while increasing the frequency control until the midway point when the output suddenly comes on like at step function. No gradual changeover. The BP and the HP each act like very narrow band-pass, once again preceded and succeeded by step functions. Great building the thing, but I'll probably bin it because of its pathetic musicality
Hi Kieran,
please check all your soldering and Parts placements. Let us know if you need some assistance.
This is not typical behaviour of this filter, it should not have a 'step-function' by design.
Very nice module - lots of experimentation options with the three filter types and the built-in vca.
Fun to build too!
fast shipping, great product, recommended
After careful assembly, it worked perfect the first time.
Thank you for such fast shipment.