Doepfer 137-1 VC Wave Multiplier I Basics

Published on Aug 7, 2014 Raul's World of Synths

"A basic description of the features and functions of the Doepfer A137-1 Wave Multiplier. Sound and Video by Raul Pena."

Doepfer 137-1 VC Wave Multiplier with Low Frequency signals Part One

Published on Aug 14, 2014 Raul's World of Synths

"A walkthrough of processing Low Frequency signals using the A137-1 Wave Multiplier. Experimenting with different settings. Sound and Video by Raul Pena."

Doepfer 137-1 VC Wave Multiplier with Low Frequency signals Part Two

Published on Aug 21, 2014 Raul's World of Synths

"A walkthrough of processing Low Frequency signals using the A137-1 Wave Multiplier. Experimenting with different settings. Sound and Video by Raul Pena."

Doepfer A137-1 Wave Multiplier with Audio rate Signals-Triangle Wave Pt.1

Published on Aug 28, 2014 Raul's World of Synths

"A walkthrough of several different timbres which can be achieved with the A137-1 Wave Multiplier with a simple Triangle Wave. Different experiments with Multiples, Folding level, Symmetry, and Harmonics are shown. Part One of Two.Sound and Video by Raul Pena."

Doepfer A137-1 Wave Multiplier with Audio rate Signals-Triangle Wave Pt.2

Published on Sep 4, 2014 Raul's World of Synths

"A walkthrough of several different timbres which can be achieved with the A137-1 Wave Multiplier with a simple Triangle Wave. Different experiments with Multiples, Folding level, Symmetry, and Harmonics are shown. Part Two of Two.Sound and Video by Raul Pena."

Doepfer A137-1 Wave Multiplier with Audio rate Signals-Sine Wave Pt.1

Published on Sep 11, 2014 Raul's World of Synths

"A short video exploring the processing of a Sine Wave with the Doepfer A137 Wave Multiplier. Part One of Two. Sound and Video by Raul Pena."

Doepfer A137-1 Wave Multiplier with Audio rate Signals-Sine Wave Pt.2

Published on Sep 18, 2014 Raul's World of Synths

"A short video exploring the processing of a Sine Wave with the Doepfer A137 Wave Multiplier. Part Two of Two. Sound and Video by Raul Pena."

Doepfer A137-1 Wave Multiplier-Modulation with Control Signals-Simple Modulation Part One

Published on Sep 25, 2014 Raul's World of Synths

"An exploration into the simple modulation of the Doepfer A137-1 Wave Multiplier.Part One of Two. Sound and Video by Raul Pena."

Doepfer A137-1 Wave Multiplier Modulation with Control Signals-Simple Modulation Part Two

Published on Oct 2, 2014 Raul's World of Synths

"An exploration into the simple modulation of the Doepfer A137-1 Wave Multiplie with two modulation sources.Part Two of Two. Sound and Video by Raul Pena."

Doepfer A137-1 Wave Multiplier-Modulation with A149 Quantized/Stored Random Voltages Pt.1

Published on Oct 9, 2014 Raul's World of Synths

"Continuing the A137-1 series with modulation. This time we begin modulating with the A149-1 Random Voltages.Part One of Two. Sound and Video by Raul Pena."

Doepfer A137-1 Wave Multiplier-Modulation with A149 Quantized/Stored Random Voltages Pt.2

Published on Oct 23, 2014 Raul's World of Synths

"Continuing the A137-1 series with modulation. This time we begin modulating with the A149-1 Random Voltages.Part Two of Two. Sound and Video by Raul Pena."

Doepfer A-137 Wave Multiplier

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"a-137 is a voltage controlled wave multiplier. the basic idea of a wave multiplier is to multiply the waveform of an incoming signal (e.g. triangle/saw/sine from a vco) within one period of the waveform. this leads to additional harmonics of the incoming signal. the period and consequently the pitch of the signals remains unchanged (in contrast to frequency multiplication e.g. with the pll module . the a-137 works as a kind of "inverse low pass filter", i.e. it adds a lot of harmonics to a signal that contains none or only a few harmonics (e.g. sine or triangle waveform). in contrast to that a low pass filter removes harmonics from a signal that contains a lot of harmonics (e.g. saw or rectangle waveform). consequently the best results are obtained in combination with input signals poor in harmonics (e.g. sine or triangle). the a-137 can be used with signals rich in harmonics too (e.g. saw) but the effect is not as remarkable as for triangle or sine waves. for rectangle signals none or only little effects are obtained.

the a-137 is a very sophisticated wave multiplier that offers much more features, more controls and more waveform manipulations than other wave multipliers available so far. in addition all parameters are both manually adjusted and controlled by external voltages. these are the features of the module:

controls:
* input level (to adjust the input level for best effect of the succeeding controls)
* multiples (number of waveform multiplications, manual control)
* harmonics (additional effect that adds more harmonics similar to the resonance/emphasis control of filters, manual control)
* folding level (controls upper and lower folding level, manual control)
* symmetry (controls symmetry between upper and lower folding level, manual control)

inputs/outputs:
* audio in (also suitable for control signals)
* multiples cv in (with attenuator)
* harmonics cv in (with attenuator)
* folding level cv in (with attenuator)
* symmetry cv in (with attenuator)
* audio out (resp. processed control signal output)

the multiples parameter (manual and ext. cv) defines the number of basic wave multiplications within one period. with the folding level and symmetry parameter (both manual and ext. cv) the upper and lower clipping levels of the wave folder units are controlled. the harmonics parameter (manual and ext. cv) adds some harmonic content by sharpening the waveform edges and adding overshoot peaks. it works a little bit like the resonance control of a vcf. the module is fully dc coupled, i.e. even control signal can be processed with the modules.

as it is a little bit difficult to describe the parameters only by words we have some pictures and audio examples available that explain the function of the module and its parameters.

the level control is used to adjust the the input signal (audio or control signal) to a level that creates the best effects when the 4 parameters of the module are altered. the signal is processed by a vca and 4 so-called wave folding stages. from the parameters folding level and symmetry the upper and folding level is derived for each stage. at the clipping levels the signal is "folded back", i.e. the direction is inverted or the signal is "reflected" at the clipping line. the working principle of the first folding stage is shown in the next picture. as the module contains 4 folding stages up to 8 foldings are possible (4 at the upper and 4 at the lower clipping level).

the incoming signal of each stage is folded back as soon as the signal level goes beyond the upper clipping level resp. is folded up as soon is goes below the lower clipping level users will know this function, indeed the a-137 includes 4 stages similar to. as mentioned above upper and lower clipping level are controlled by the folding level and symmetry controls (both manual and cv controlled). from our point of view these parameters are easier to use than upper and lower clipping level. the internal upper and lower clipping levels are derived by adding resp. subtracting the folding level and symmetry voltages. the vca setting (multiples control) defines the number of wave multiplications or foldings as the multiplications depend upon the level that appears at the folding stages. smaller levels lead to less multiples, higher levels cause more multiples as the folded output signal of the preceeding stage has sufficient level for a subsequent folding in the next stage.

the harmonics control sharpens the waveform slopes and adds some overshoot at the edges - a little bit like the resonance control of a filter. internally the harmonics feature is realized by an additional vca for each folding stage..."

Click here for more posts on the Doepfer A-137 Wave Multiplier including videos.

Loaded Custom Doepfer, Livewire, Metasonix A-100 Modular Synth

Note: Auction links are affiliate links for which the site may be compensated. via this auction

"Custom Doepfer A-100 Eurorack 4 x 3U Modular Synth. Customized to be used both as a synth and a sound design system, this modular is loaded with the best sounding synth and sound manipulation modules. Everything is in pristine condition cosmetically and functionally.

Livewire Audio Frequency Generator (x2)
Livewire Dalek Modulator
Livewire Vulcan Modulator
Harvestman Malgorithm
Flight of Harmony Plague Bearer
Malekko Assmaster
Metasonix R-51 VCA (x2)
Metasonix R-53 Waveshaper/Ring Mod
Doepfer A-119 Env Follower
Doepfer A-144 Ring Modulator
Doepfer A-116 Waveforem Processor
Doepfer A-137 Wave Multiplier
Doepfer A-118 Noise Generator
Doepfer A-138 Mixer
Doepfer A-124 Wasp Filter
Doepfer A-106-1 Extreme Filter
Doepfer A-180 Mults
Doepfer A-188-1 BBD Module
Doepfer A-160 Clock Divider
Doepfer A-147 LFO
Doepfer A-140 Env Generator (x2)
Doepfer A-134 Dual Crossfader
Doepfer A-131 VCA
Doepfer A-134 Panning Module
Doepfer A-182-1 Switched Mutls
Doepfer A-100g6 Racks (x2)
20 Patch Cables"

Expanded Doepfer A100 Basic System 2 in Monster Base Frame Case

via this auction

"12 modules not included in the Basic System 2 as well as the A-100 Monster Base Frame and extra cables (including stackables).

General Description
Doepfer A-156 Dual Quantizer ($175)
2 x Doepfer A-181 multiples 2 ($50/$100)
Doepfer A-187-1 Voltage Controlled DSP Effects ($375)
Doepfer cable pack ($102)
Doepfer A-174 Joy Stick ($110)
Doepfer A-180 Multiples 1 ($45)
Doepfer A-111 High-End VCO ($349)
Doepfer A-137 Wave Multiplier ($160)
Doepfer A-154 Enhanced Sequential Controller ($245)
Doepfer A-155 Analog/Trigger Sequencer ($375)
Doepfer A-199 Spring Reverb
Doepfer A100 Basic System 2 w/MIDI ($2,599)
Pomona Model 1508 ($19.99)
Doepfer A-100 Monster Base Frame ($1200)
Tiptop Stackable cables ($48)
Doepfer A-149-1 Quantized/Stored Random Voltages ($145)
Doepfer A-149-2 Digital Random Voltages ($75)
Doepfer Eurorack Switch Covers ($3.00)
1/4 to 1/8 Adapter Cable Package ($60)
2 x 5-pack A.S. 12" patchcords ($35.90)
2 x 3.5mm Patchcords 20 inch 5-pack ($49.98)
Doepfer 199 Spring Reverb
Inlcuded Reverb Spring System
(not installed for safe shipping)"

CLICK FOR MORE »

A-137 Wave Multiplier

A-137 Wave Multiplier from Pete Shambler on Vimeo.

"First patch with our new Doepfer A-137 Wave Multiplier, as well as the first patch on our temporarily shrunken modular system.

Serge sounds-- so far, I love the 137! I'd been on the fence on the module for a long time and am very happy I picked one up. I'm looking forward to using it for non-FSU purposes eventually, too. In the meantime...

theshamblers.blogspot.com"

Custom Analog Modular Synthesizer - Eurorack Format

via this auction

"Livewire Audio Frequency Generators x2
Doepfer A-134 Panning VCA
Doepfer A-138 Exponential Mixer
Doepfer A-176 Control Voltage Source
Doepfer A-137 Wave Multiplier
Doepfer A-143-3 Quad LFO
Plan B Model 9 Mixer
Doepfer A-147 VC LFO
Doepfer A-106-6 Xpander Filter
Doepfer A-105 SSM Filter
Plan B Model 31 Buffered Multiple
Custom Synthesis Technology 440 LP Filter in Frac Format ( This is the original 440 filter board built by Paul Schrieber and custom fit to a newly designed Frac Rack front panel)
Synthesis Technology MOTM-1800 Envelope Generator x2
Synthesis Technology MOTM-1190 Dual VCA
Custom Interface Panel ( I built a custom panel with a snake cable system that allows the connection to a Kenton Pro Solo and allows for 4 channel audio inputs to the modular and 2 channel audio outputs)"

CLICK FOR MORE »

Doepfer A-137-2 Wave Multiplier Module Eurorack

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Module a-137-2 is another version of a wave multiplier. in contrast to the a-137-1 wavemultiplier i the a-137-2 generates four phase-shifted copies of a vco signal applied to the audio input. the four shifted signals are added to the original signal to obtain a fat sound similar to five independent vcos. the phase shifting is made by a simple circuit that works only for sloped signals like sawtooth, triangle or sine, but not for rectangles or pulses"

Doepfer A-143-2 Quad ADSR controlling 3 LPGs

Doepfer A-143-2 Quad ADSR controlling 3 LPGs from katavist on Vimeo.

"This is a fairly basic (and visually boring, sorry) demo of the A-143-2, showing one of many possible uses. The patch was rather complex with Wiard Malekko Anti-Oscillator as the only audio-source, Wiard Malekko Borg Filter in LPG mode, PlanB Model 13 (both gates), MakeNoise Maths voltage mirroring MFB Dual LFO random output - this output and the mirrored cv were mixed by a Doepfer A-138c Polarizing Mixer (with additional inputs from diy 8 step sequencer and Bugbrand Ctl-1 as 4 step 3 track sequencer) all controlling Anti-Osc pitch… Model 13 SUM-output also into Doepfer A-188-1 4096 stages BBD whose output was filtered by Wiard Joyrider double Borg and finally sent to the Blacet Time Machine. First output from Model 13 into Doepfer A-137-1 Wave Multiplier I (which was fed 4 cvs from A-144 Morphing Controller modulated by A-147 VC LFO and then into diy spring reverb... plus some more senseless Maths patching and whatever I forgot... Ah, and thanks to TipTop for the wonderful stackcables!"

PLL Ringmod

YouTube via boobtube356
"Doepfer A-196 PLL tracks Plan B M15 VCO. PLL output passes through Plan B M12 bandpass filter and then is ring modulated with the M15 sine output. The result goes to the Makenoise QMMG. The background is a Cwejman VCO-6 sine going to Doepfer A-137 wave multiplier, then ring modulated with Cwejman MMF-1. The result goes to the Cwejman VCA-4MX and is then panned at audio rate by a Cwejman VCO-2RM. Sequence is from Doepfer A-160/1, A-152, A-143-3 and Plan B M14."

NAMM: New Products from Doepfer

via Doepfer where you can find the full press release.

"Dear Sir or Madam,
on the occasion of the NAMM in Anaheim/CA January 17-20, 2008 we will show our news at the booth of our US representative Analogue Haven: Level 2, 210 Meeting Room D. Attention: this is a bit outside the standard exhibition area. A detailed plan is available on our website www.doepfer.com.

We are looking forward to seeing you at the booth and hope for some mention about it in your NAMM show report. On the following pages you find the new gear we will present in Anaheim.

If you need more details (e.g. pictures, more detailed product description) don't hesitate to contact me directly. This press release is available on the press page of our website as a pdf or MS Word™ file. More detailed information about the devices is available via the corresponding link on the news page of our website: www.doepfer.com > NEWS > link to the corresponding device.

Best regards
Dieter Doepfer
email adress: hardware@doepfer.de"
Full list of items announced:
A-100 CV/Gate Keyboard (A-100CGK)
A-100 Low-cost Suitcase
A-137-2 Wave Multiplier 2
A-106-6 XP VCF (Filter Pool)
A-189-1 Voltage Controlled Bit Cruncher/Modifier
A-138e Quad Three-Way Crossfader/Mixer / Polarizer
A-132-3 Dual Linear/Exponential VCA
A-134-2 Dual Voltage Controlled Crossfader
A-138d Crossfader/FX Insert
A-164-1 Manual Gate
A-182 Switched Multiple
A-185-2 Precision Adder/Bus Access
A-186-1 Gate/Trigger Combiner
A-100 DIY Kit 1
A-100 DIY Kit 2 (low cost DIY kit)
USB64
MBP25
Wheel Electronics

Doepfer Livewire Plan B MFB Analog Modular

images via this auction

"Doepfer Black Portable Case with 115V power supply, power bus boards and power cord
-Doepfer A-100 AD5 power converter for the A-190
-MFB OSC-01 Triple DCO ---- 3 Digitally controlled analog oscillators with ringmod and OSC SYNC!!!
-Plan B Model 15 Complex VCO ---- The best VCO in Euro-format!!! Can't beat that Morph function!!
-A-112 Sampler VC Sampler/Wavetable Oscillator ---- 8 bit crunch with MIDI!!! Can even use like a delay!!
-Livewire Vulcan Modulator LFO/LFVCO ---- Dual FUNKED out LFO's!!! Can also be used like VCO's!!!
-Plan B Model 10 Polyphonic Envelope ---- Great EG!!! Some really cool settings!!
-Livewire Dalek Modulator VCO/LFVCO ---- Funked up modulators!! Dual VCO's w/ destroy ringmod!!! LFO
-A-190 MCVS Midi-CV/Sync Interface ---- Midi to CV/Gate converter with sync and trigger.
-A-170 SL Dual Slew Limiter
-A-105 VCF SSM 24dB LP Filter ---- The best LP filter in modular format IMHO!!! Think Prophet 5 rev.2!!
-A-137 VC Wave Multiplier ---- Multiplier and Wave folder!!
-A-118 Noise and Random Voltages ---- use for white and various forms of pink noise and a modulator.
-A-138 Linear Mixer ---- for mixing audio and cv signals
-A-121 VCF2 MultiMode Filter ---- Uses a Curtis CEM 3320 filter chip!!
-A-140 ADSR Envelope Generator
-A-132-2 QVCA Quad VCA ---- Great for both Audio and CV signals!!"

Some audio 'made with doepfer'

via ISM who brought us the Big Doepfer Filter Shootout:

"All tracks were made with a Doepfer A100 system plus some drumsamples, a Roland RE-201 and a Korg SE500. Polyphonic stuff was done with a detuned DX7 pure sine oscillator patch processed with Doepfer modules. Mixing done in Cubase.

The Doepfer modules that you can easily recognize are the filters and BBD modules. The bass sounds are derived from pure bass sine waves with A-136 distortion and A-137 wave multiplier. Phasing is done with the 12 stage vactrol phaser and a bit of thru zero flanging with the A-188-1 and A-118-2 BBD modules. But basically all sounds are processed with Doepfer modules.

Early 2010 there will be a limited edition cd with about 15 dubs in this kind of style."

A-137 and VCO-2RM

YouTube via boobtube356
"Cwejman VCO-2RM ring mod output. The pair is in sync mode and the Doepfer A-137 Wave Multiplier is processing the sine output of OSC1 before being ring modulated with OSC2 sine using the on-board ring modulator. Most adjustments are made to the A-137 and the pitch of OSC2. The Make Noise QMMG is in low pass gate configuration with the resonance and freq up a little on the first channel. Sequence is S&H LFO to Plan B M14."

Quad LFO and Wave Multiplier Demo

YouTube via boobtube356
"Doepfer quad LFO modulating an A-137 wave multiplier to demonstrate what can be done with these two modules alone. One of the LFOs is providing audio to the A-137. The other modules involved are not altering the sound."

Stoneroot Live @ Turku Synth Club Modular Meet 2016

Published on Jan 31, 2016 jarsamo

"Here's a piece I played/improvised with my mainly Doepfer-based modular synthesizer at Turku Synth Club Modular Meet in 30.1.2016.

I used the Roland Boutique JP-08 synth to add some extra spice. Roland's sequencer was only used for the JP-08. There isn't a proper sequencer running the modular - everything is based on a single square LFO wave as a "main" gate, which is run through clock divider/multiplier to get multiple different rythmical variations for controlling different elements. The "melody" line is actually a sample/hold random shit attenuated and run through a quantizer.
I also used Yamaha mixer's hall reverb to add some room. The performance was recorded with a Zoom H1 which also seems to have picked a beer can opening sound in the beginning quite nicely ;)

List of modules used is pretty much here: A-178, A-199, A-101-6, A-171-2, A-110-4, A-137-1, A-132-3, A-124, A-101-2, A-110-2, A-137-2, A-188-1, A-103, A-120, A-160-5, A-160-2, A-118, A-148, A-147-2, A143-3, A-140, A-138

Download the audio file from Soundcloud: https://soundcloud.com/rotsten/stoner..."

MFB SEQ-01 modular demo

YouTube via burstgenerator.
"MFB SEQ-01 triggering 2 LFO resets and 3 envelope generators. its being clocked off a PlanB Model-28 Tapper, then the SEQ-01 is sending LFO resets on two tracks and trigger envelope generators on 3 other tracks. thats it, no other modification sources. a Doepfer A-110 oscillator patched into an A-137 wave multiplier which runs into an A-105 SSM filter and finally to a PlanB Model-13."

Dueling VCAs

YouTube via boobtube356
"Cwejman VCO-6 sine output through Doepfer A-137 Wave Multiplier, then amplitude modulated by self oscillating MMF-1. The result is sent to the VCA-4MX for the high notes, and the Makenoise QMMG for the low notes. The sequence is chaotic, using the PH-4, the A-147 VCLFO, and the A-170 Slew Limiter. The notes are S&H LFO through the A-156 Dual Quantizer. Both the VCO-6 and MMF-1 are getting feedback modulation from the VCO-6 sine output."

Eurorack - Doepfer A-137-1 Wave Multiplier 1

Published on Dec 5, 2013 batchas·148 videos

"Bubblesound uLFO + Make Noise Maths + A-137-1"

Doepfer A-137-2 Wave Multiplier II Demo

"The module uses comparators to generate four phase-shifted copies of the incoming signal to provide a robust, multi-oscillator type sound. Think 'super-saw' without any of the phase cancellation issues usually associated with mixing multiple VCOs."

Demos on navs.modular.lab

scorbie immigrant VIII

Published on Jul 22, 2014 scorbie

"Razmasynth VIII running Steffensen Oscillarps, Envillarp and Arplifier, Frequency Central's System X VCO, Electro Cardiogram and Raging Bull, through the usual Doepfer bits i.e A-137-2 Wave Multiplier, A-155 Audio Divider, A-199 Spring Reverb, Frequency Central Loop/Env Generator, Continuum Phase Shifter, SysX S/H Noise and..."