The Subharmonic Oscillator is one of Serge’s latest inventions and also one of his most extraordinary designs. 7 accurate analog VCOs tied at the waist—in unison, yet their frequencies can open up like a fan, creating complex clusters. Each voice generates a pulse wave. It is temperature compensated and follows exceptional 1V/Octave tracking.

In addition, each voice provides (voltage controlled) pulse width modulation or subharmonic division as well as an individual output. The precision of these voices in combination with a global Spread control and various FM inputs opens up an enormous sonic range from massive unisono sounds to dissonant, orchestra-style textures.

The ODD and EVEN outputs enable the use as a stereo oscillator.

Specifications

• Width: 42hp
• Depth: 25mm
• Power: +12V 220mA / -12V 200mA

Manufacturer product page here.

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Some functions for which one Slope Generator can be used:

• Function generator for linear, logarithmic, exponential, stepped etc. curves
• Integrate an incoming signal
• Sawtooth / Pulse oscillator
• Add, subtract up to 4 signals
• Max and Min function
• VC Transient Envelope Generator
• VC LFO
• VC Portamento device, Envelope Follower (Detector), VC Pulse Delay (Monostable), Sub-Harmonic Series Generator (Divider), Audio Oscillator with variable waveform symmetry (saw to triangle), Non-Linear Audio Processor (low-fidelity VCF).

Specifications

• Width: 26hp
• Depth: 25mm
• Power: +12v 90mA / -12v 80mA

Manufacturer product page here.
Product manual here.

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The CV inputs can also be abused to feed audio signals – e.g. form an external oscillar or one of the individual outputs – into the system.

The eurorack version adds a two-channel mixer with attenuators and a Feedback section which allows to feed back the output signal. A powerful tool for sound processing but also for sound creation!

There are three equalized outputs: the two Comb outputs provide the sums of the two alternate filter bands while the two top outputs are the mix of all filter bands. Please note that there is no sharp separation between the bands, moving any frequency knob will have an influence on both Comb outputs.

Specifications

• Width: 42hp
• Depth: 25mm
• Power: +220mA, -200mA

Manufacturer product page here.

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Jürgen’s original Resonator (like the Polymoog) had a switch to select one of 3 basic modes, i.e. only one mode could be used at a time. The Haible VC Resonator now provids the same 3 modes as separate outputs so they can be used simultanously, e.g. for further processing like crossfading.

Specifications
Width: 18hp
Depth: 30mm
Power: 60mA @ +12V and 60mA @ -12V
Manufacturer product page here.
Product manual here.

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The PCO is a versatile, voltage controlled oscillator now offering four high quality waveform outputs (sine, triangle, pulse and sawtooth) and both linear and exponential frequency modulation capabilities . A front panel switch conveniently extends the range of the PCO from the audio range (16 to 16,000 Hz) to a sub-audio range (.1 to 200 Hz) for use as a Low Frequency Oscillator.

EXCELLENT RESPONSE, TRACKING AND STABILITY: Featuring the identical exponential response, exceptional tracking characteristics, and perfect temperature stability as the NTO, the PCO is especially suited for use with the NTO or another PCO as a modulation source for dynamic depth linear FM.

Two calibrated one volt per octave inputs as well as a variable processing input are provided for complex frequency control. FM depth can be varied with the front panel adjustment. A Sync input is also available for locking the PCO to another oscillator’s fundamental, harmonic, or sub-harmonic frequency.

The Serge PCO is the only authorized version of Serge’s classic design.

Specifications

• Width: 14hp
• Depth: 30mm
• Power: +75mA / -60mA

Manufacturer product page here.

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The Smooth section will place a positive and negative slew on input voltage transitions for lag effects, voltage controlled portamento and for low frequency filter applications. In Cycle-mode (cycle jack patched to the input), the Smooth side “will oscillate yielding a voltage controlled triangle wave LFO. A high level into the HOLD input will enable the Smooth Function to be used as a track-and-hold circuit with voltage controlled slew rate.

The Stepped function can be used as a sample-and-hold with voltage controlled slew rate limiting. In Cycle mode, a pulse applied to the Sample input will generate complex staircase waveforms for control voltage applications and for use as audio signals.

Each side has a temperature-compensated 1V/Oct input for use as an oscillator with a frequency range of up to 20kHz (left) and 8kHz (right). Each side tracks over 5 or 6 octaves.

The Coupler is an internal comparator which compares the output levels of the Smooth and the Stepped Generators. This output is useful for generating complex control voltages or random voltages.

Specifications

• Width: 18hp
• Depth: 25mm
• Power: +45mA / -40mA

Manufacturer product page here.
Product manual here.

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Now – for the first time, designed and licenced by Serge – the VCF2 is available as a eurorack module. A new switch has been added which determines if the CV-controls are routed to the first (left), second (right) or both filters, bringing even more sonic options than the original.

Specifications
Width: 20hp
Depth: 30mm
Power: +45mA, -29mA

Manufacturer product page here.

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Specifications
Width: 18hp
Depth: 30mm
Power: 45mA @ +12V, 40mA @ -12V

Manufacturer product page here.
Product manual here.

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The Active Processor (ACPR) is an accurate, linear crossfader for either control voltages or audio signals. The new version designed by Serge in 2017 offers a widely increased precision. This module provides an important link in complex patches, allowing to smoothly change from one control voltage to another. It is possible to cross- fade between different envelopes, for example, or to gradually switch control over a bank of oscillators from one output of a sequencer to another output. The ACPR also offers interesting uses in the audio range, from wave- blending even to waveshaping (with CV in audio-range).

The Serge NOISE SOURCE (NOI) generates both white and pink noise waveforms. The S/H Source output pro- duces the necessary input for a sample and hold function to produce equi-probable random voltages, similar to a 1/F distribution function and is a perfect companion for the Smoothed & Stepped Generator (SSG).

The Precision CV-Processor (CV-PRO) is also a new development that goes beyond adding and inverting control voltages. A precision input stage allows mixing 1V/ Oct voltages, e.g. to cent-accurately transpose sequences (i.e. stay in tune). A switch transposes precisely one octave up or down. The attenuverting stage offers full processing control of level and polarity of three inputs voltages includ- ing Serge’s unique diode-based wave-compression. This new version now allows using the non-linear attenuverter mixing stage with precise 1V/Oct (AUX) inputs without los- ing their precision. IN 1 is normalled to 5V and therefore can be used to add an DC offset when no input signal is present.

The new version has been developed by Serge for and in close cooperation with Random*Source.

45 mA +12V
40 mA -12V
0 mA 5V
35 mm deep

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