CubuSynth Modular

Notes: The 4VCLFO is four LFOs with triangle Outputs in 10hp. It features a knob for the Frequency of each LFO and CV inputs with attenuators.

The "Aux" input is normalized to the four CV inputs, so you can modulate all LFOs with one signal at the same time. Plugging a cable into the CV input breaks its connection from the aux input.

This way you can create more interesting Modulations for your Patches.

You can easily customise LFO speeds to your liking by changing capacitor values on the back.

Features:

- Size: 10hp
- Single SMD Pre-soldered PCB design
- 10 pin power
12 mA +12V
12 mA -12V

Notes: The CubuSynth 6xLevel module is a 8hp passive Attenuator, which allows scaling of CV and audio signals. The inputs are normalized from the outputs above, which allows passive multiplication with attenuation. The normalized path is attenuated by the potentiometer before, so you can also create very subtle changes (e.g. Fine tune a VCO).

The white lines on the Front panel mark the normalisation routing.

Dimensions
8 HP
12 mm deep

Current Draw
Module does not draw current

Notes: The CubuSynth ADSR Module is a VC looping envelope generator, with controls for the Attack, Decay, Sustain and Release stages, for overall Time of the envelope and CV inputs for Time and Level.

The EnvGen8 chip was written/designed by Tom Wiltshire aka "Electric Druid".

1 ATTACK (1ms - 10s)
Sets the time, the Envelope takes to reach full level from the moment a gate is detected (Key is pressed)
2 DECAY (1ms - 10s)
Sets the time, after the envelope hits full level, to fade to the level set by the SUSTAIN Knob.
3 SUSTAIN (0% - 100%)
Sets the Volume to stay after the decay, while the GATE input is high.
4 RELEASE (1ms - 10s)
Sets the time for the fade out on falling edge of the GATE input (after the Key is released)
5 MODE switch
Select between exponential and linear curves.
6 PUNCH switch
Adds extra thump to very short percussive envelopes
7 LOOPING MODE switch
Allows selection between three different modes of operation. Gated mode is a normal envelope. Gated Looping will
trigger the ATTACK stage when the GATE goes high, then continue looping whilst the GATE remains high, and will
RELEASE to zero when the GATE goes low. The LFO Looping mode loops continuously and ignores input from the
GATE.
8 TIME (x1 - x100)
Overall Time control which shortens the length of the entire envelope.
9 TIME CV Attenuator
Attenuates incoming CV for Time modulation. Higher voltages will shorten the
length of the envelope.
10 TRIG Input
Re-trigger for the envelope. Useful for Polyphonic patches. Envelope goes to
ATTACK stage on rising edge of 0-5V pulse while Gate can still be on.
11 GATE Input
Normalized to TRIG Input. Envelope goes to RELEASE stage on the falling edge.
12 Level CV Input
Control the overall Volume of the envelope. Can be used for velocity control.
If nothing is plugged in, the Volume stays on max.
13 OUT
CV-output of the envelope (0 to +5V)
14 LED
Indicates the output voltage.
15 TIME CV
CV Input for Time modulation. Higher voltages will shorten the length of the
envelope.
16 INV. OUT
Inverted voltage of the output CV (0 to -5V)

Dimensions
10 HP
25 mm deep

Current Draw
16 mA +12V
16 mA -12V
7 mA 5V

Notes: The CubuSynth ConseQuencer is a powerful tool to create generative, randomized, and complex sequences and melodies on the fly. Featuring touch-activated step selection, versatile gate modes, and configurable CV outputs, this sequencer offers unique possibilities and control over every note. With built-in clock generation and division, five sequencer modes, and a pitch quantizer, the ConseQuencer influences the behaviour of every note that makes part of your Melody, ensuring dynamic and evolving patterns. Perfect for both live performance and studio production, the ConseQuencer brings your musical ideas to life with precision and flexibility.

Size: 42HP x 3U / 212mm x 128.5mm
Depth: 25mm (measured from the front panel)
Max. Current Draw:
+12V: +40mA
-12V: 0mA
+5V: 0mA

Built Module / ready to use

Notes: Dual / Stereo Multimode VCF with Self-oscillating Resonance and intuitive Routing and CV modulation Matrix

The CubuSynth Dual CS-20 VCF is a dual / stereo multimode VCF / Phaser / VCO, inspired by the legendary Korg MS-20, with CV control over frequency and resonance. The resonance can self-oscillate and features a 1V/Oct input, stable over at least 2~3 octaves.

Each of the two filter cores has 2 stages of Low Pass and High Pass filtering, which can be blended.

The Frequency CV can be "attenuverted" (with inverting attenuator on CV input). The resonance CV comes with an attenuator.

Key features

2 individual Filter cores with common Frequency and Resonance controls
CV control over Frequency and Resonance for each Filter core
self-oscillating Resonance with LED feedback circuit (visible on the Front)
1 V/oct input, tracking over 2~3 octaves
Frequency Range: 22 Hz - 20 kHz
Blend between LP / HP Filter modes
Ability to use as 2 pole (12db) stereo HP/LP Filter, 4 pole (24db) mono LP/HP or a Band Pass (12db) Filter
Cross FM Modulation possible

Specifications

Size: 10HP x 3U / 50mm x 129mm
Depth: DIY version: 36 mm
Built version: 24 mm
Max. Current Draw:
+12V: +19mA
-12V: -19mA

Notes: The CubuSynth Dual Vintage VCA is a nice sounding, zero bleed, analog Voltage controlled amplifier based on the LM13700 Dual OTA. It can work as two independent VCAs or as a stereo unit, and CV input 1 on channel 1 is normalized to the CV input 1 on channel 2. (same signal can control both Channels).

The Original concept is designed by Tom Wiltshire aka "Electric Druid". For more information visit:

https://electricdruid.net/design-a-eurorack-vintage-vca-with-the-lm13700/

1 LEVEL
Sets the Amplitude for each channel.

2 CV AMOUNT
Attenuates the Control voltage from CV input (3)

3 CV
CV input for the amplitude Modulation. The input on channel 2 is
normalized from CV on channel 1 when nothing is plugged in.

4 CV2
A second CV input for amplitude modulation, without attenuator

5 IN
Input for Audio Signal

6 OUT
Output for the Audio Signal

Dimensions
8 HP
25 mm deep

Current Draw
9 mA +12V
9 mA -12V

Notes: The CubuSynth Engine V2 is their updated dual analogue 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 internal "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.

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

Dimensions:
24 HP
24 mm deep

Current Draw:
87 mA +12V
74 mA -12V
15 mA 5V

Notes: The Exhaust adds many features to your Engine V2 VCO module like Sub-octaves, Mixing and a Gate / Trigger generated by the Chaos signal.

You can select one of the two VCO cores of the engine to Produce Square Waves one and two octaves below the Oscillators frequency. You can blend between -1 and -2 octaves and Set the volume they are Mixed into the Main "Mix" output.

The knobs "VCO1" "VCO2" and "AM" set the level of the selected waveform of each VCO and the AM output from the Engine to the Main Mix. The "Ext In" Input is normalled from the RM output, but you can plug in any other signal to go to the Main Mix.

The V Ref sets a Voltage between 0V and +10V which compares against the Chaos signal from the engine (Chaos attenuator on the Engine doesn't matter). Whenever the Chaos signal is higher in Voltage than the Knob setting, It will Give you a Gate or Trigger signal depending on the switch. There is also a CV input, which offsets your V Ref and can create interesting Rhythms.

Features:

Two Sub-Octave generator with selection switch, Mix knob for -1 and -2 octaves (marked as /2 and /4)
5 Channel Audio Mixer for 4 different Outputs from the Engine and level for the Sub-Octave generator
External Input for Mixing with other signals
Semi-Random Gate or Trigger Output generated by the Chaos signal
Audio-optimized Chaos Output
Separate Outputs for Sub-Octave and Main Mix

Dimensions
8 HP
24 mm deep

Current Draw
6 mA +12V
5 mA -12V

Notes: 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.

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 / 50mm x 129mm
- Depth: 34mm (measured from the front panel)
- Max. Current Draw:
+12V: +14mA
-12V: -14mA

Notes: The CubuSynth VCLFO v2 is a Complex voltage controlled Low frequency oscillator, with 16 Waveforms, Step control (Sample&Hold style), LFO Sync / Reset, CV control over Frequency, Amplitude, Waveform, Frequency multiplier, Skew and Step Rate.

16 Waveforms selectable in two Banks of 8
Frequency range: 0.05Hz to 12.8Hz (102.4Hz with multiplier x8)
6 CV inputs for Multiplier, Frequency, Step Rate, Skew, Waveform and Level
"Sync" Input for LFO reset, or Step Sync
3 outputs:
Uni-Polar (0 to +5V),
Bi-Polar inverted (+5V to 5V / 10Vpp) and
Bi-Polar normal ( 5V to +5V / 10Vpp)

Size: 10 HP / 50 mm
Depth: 2 4 mm (measured from the front panel)
Current Draw:
+12V: +40 mA
-12V: -30 mA

single SMD PCB design