CubuSynth VCFA Full DIY Kit User Manual
- June 8, 2024
- CubuSynth
Table of Contents
VCFA Full DIY Kit
User Manual
VCFA
Multimode VCF with
LP,HP and BP outputs and integrated VCA
Introduction
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.
Specifications
- Size: 10HP / 50mm
- Depth: 34mm (measured from the front panel)
- Current Draw:
+12V: +14mA
-12V: -14mA
Key features
- 3 simultaneous Outputs for Low Pass, Band Pass and High Pass
- Integrated VCA at the input stage
- CV control over Volume, Frequency and Resonance
- “Ringing” mode on upper Resonance setting
- 1 V/oct tracking over 2~3 octaves (with Freq CV attenuator on 100%)
- Saturation on incoming signal (VCA stage) on upper Gain setting
Limited Warranty:
CubuSynth guarantees this product to be without defects in materials and
workmanship for a period of one year from the date of purchase (proof of
purchase/invoice needed).
Malfunctions due to improper supply voltages, incorrect or reversed Eurorack
power cable connection, misuse of the product, removal of knobs, changing
faceplates, or other causes determined by CubuSynth are the user’s
responsability and are not covered by this warranty.
During the warranty period, all defective products will be repaired or
replaced, in the CubuSynth workshop with the customer paying the shipping
costs to us.
CubuSynth takes no responsibility for any damage to persons or equipment
caused by the operation of this product.
Please contact cubusynth@gmail.com with any
questions, authorization for return to manufacturer or any needs and comments.
VCFA
PCB V1.2 Sept 2022
Written and Illustrated by Ruben Sponar
The CubuSynth VCFA was designed by Ruben Sponar, from first prototype in
January 2021 to the finished module in September 2022.
A few honorable mentions:
The main Filter circuit is based around the VCF-3 from Sculls&Circuits
The VCA part was originally designed by Tom Wiltshire (electric druid) and
modified for the Input VCA stage and the Resonance feedback path.