Serge Wave Multiplier PCB/Panel

The legendary Serge Wave Multipliers (VCM) are designed to dynamically add new harmonically-related overtones to an input waveform.

This is a PCB & Panel set in the Eurorack format. However - this PCB has the vast majority of the parts already populated. Check the build docs for more information.

Availability: In stock




The legendary Serge Wave Multipliers (VCM) are designed to dynamically add new harmonically-related overtones to an input waveform. Accroding to the 1982 catalogue, they “alter the timbre in exciting new ways, producing interesting alternative forms of signal processing which are unique in the Serge Modular Music System. Since there are three entirely separate and different types of Wave Multipliers in this module, an enormously varied palette of new effects can be synthesized.”

The top section offers two different modes, selected by a switch. In the “HI” position, the module functions to “square-up” an incoming signal, with a rounded flattening of the signal peaks, somewhat similar to overdriving a tube amplifier (with voltage control!). In “LO” mode, the module is a linear gain controlled VCA. This is useful for various functions such as amplitude modulation and for gating signals into the other sections.

The middle section generates a sweep of the odd harmonics (1, 3, 5, 7, 9, 11 and 13th) when a sine wave is applied to its input and the FOLD knob is turned up or a control voltage is swept from low to high. This effect is similar to overblowing a wind pipe closed at one end. A second input is included to allow two signals to be mixed before processing. This module can be used to explore timbral areas beyond the range of ring modulation.

The bottom Wave Multiplier performs non-linear wavehaping known as full-wave rectification, but with sophisticated level-compensating conditioning as well. The circuit uses three full-wave rectifier sections linked in a very refined controllable format. Sweeping the VC input over its range will produce a smooth timbral transition using the even harmonics (second, fourth, and eighth). Many other partials are present in this basic sound, however, and the sonorities are very rich and varied. The white output is a “squared up” version of the black one, resembling an harmonically enhanced pulse width modulation.

The Random*Source version of the Serge Wave Mulitpliers for Euro is a licensed and authorized adaption of the original Serge design, using best parts available today (e.g. Burr-Brown op-amps, C0G capacitors up to 220N) for optimum audio performance.

Now - for the first time ever and licenced by Serge - the Wave Multipliers are available as DIY (SMT) kit for Euro.

Specs & Downloads

Specs & Downloads

manufacturer RandomSource
HP 18
Depth 35mm
+12V 45mA
-12V 40mA
+5V No
Additional Resources Build Guide


Customer Reviews (3)

Cheap knobs stockedReview by disappoint
You are better off buying the panel/pcb kit - there are very few parts and the knobs stocked with the kit are of the nasty cheap kind. (Posted on 8/28/2016)
This Module Speaks Meth Cougar Language, a Follow UpReview by Eric
Yes, with this glorious module you can make the following sounds and so much more:

Should you encounter a meth cougar in the wild, you might not need to defend yourself IF YOU HAVE THIS MODULE, because this module will enable you to communicate with the meth cougar, thereby enabling you to broker a lasting peace with the animal. This module seriously and accurately replicates meth cougar screams as heard in the above video.

DISCLAIMER: It is in no way advised that you seek out a meth cougar for the sole purpose of brokering peace using this module. Please multiply your waves responsibly. (Posted on 2/29/2016)
In the Interest of Defending Oneself from Unwanted Animal AggressionReview by Eric
About 6 years ago I was living in the woods of rural North Idaho. I was walking to my car one night and heard the distinctive growl of a mountain lion about 20 yards up the hill in the darkness. There was also rumor of multiple meth labs in the area at that time. And so, soon after, I purchased a shotgun. I moved back to the largest town in North Idaho about two years ago having never needed to defend myself. I've been meaning to sell the shotgun and just did this afternoon at the local Cabela's. I intend to replace it with a Random*Source Serge Wave Multipliers, hoping that the Wave Multipliers will prove an adequate defensive weapon should I encounter any aggressive meth cougars in the future. (Posted on 1/26/2016)

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