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The wave folding effect is cleaner in tone than some other wave folders but by turning 
up the other channels (II-VII) and the distortion effect (DIST knob), more complex tones 
can be created. Although the VII channel folds the wave more than other channels, the 
III and V channels also work as wave folders and can be mixed together as well. 
 
 

RING MODULATION 
 

Well not technically a ring modulator…, but if you apply two VCOs to the two inputs 
you can get tones very similar to ring modulation. Combining two signals will vary the 
 
amplitude and phase of different harmonics both from IN I and IN II. As mentioned 
before, since each channel is slightly different, unique tones can be created with each 
channel. 
 

 

Connect a VCO to IN I. Connect another VCO to IN II. Turn up both IN I and IN II 

knobs. Turn knobs II-VII. Try modulating the frequency of one of the VCOs. 
 

 

Try tuning the two VCOs to different frequencies. Controlling them with the same volt 

per octave source, sequencer or keyboard, can create a range of sounds. 
 
 

DISTORTION 
 

There is built in distortion/clipping circuit built in to the module that allows for 
additional tones. Turning up the channel one knob (I) while the other channels are 
turned down (II-VII) will create a basic distortion / squaring effect on the inputs. 
 
Pulse width generation can be achieved by applying a triangle, sine, or sawtooth VCO 
to the input and applying an LFO to the CV input. Thick pulse width sounds can be 
achieved by turning up the other channels. 
 
Sync type sounds can be achieved by using an envelope generator and a VCA to 
control the amplitude of the incoming VCO signal. 
 
 

FEEDBACK 
 

The harmonic multiplier is designed to create more tones by feeding the signal back 
into itself. 
 

 

Apply a VCO to IN I. Turn up the input knob (IN I). Turn up any of the output knobs (IVII). 

Patch any of the individual output jacks (II-VII) to the IN II jack and turn up the IN II 
knob. 
 

 

Feeding channels II or IV back into the module will create various distorted 

subharmonics. These subharmonics can be modulated using the CV input or changing 
the amplitude of the input VCO. Try adjusting the input knobs to change how the CV 
affects the sound. 

Summary of Contents for HARMONIC MULTIPLIER

Page 1: ...changing the amplitude of certain frequencies and the phase of others When used with the distortion circuit actual pulse width modulation is achieved When used in combination with feedback modulation between different distorted subharmonics can be achieved OUTPUT JACKS OUT Main output 5V max II VII Audio output for the individual harmonics levels vary 2 3V peak to peak max INPUT KNOBS IN I Control...

Page 2: ...each wave is slightly different Other waveforms and sounds besides triangles can be used with different sounds resulting Input a triangle wave VCO to the channel one input IN I Turn the IN I pot clockwise to correspond to the input amplitude For most eurorack oscillators at 10V peak to peak 5V turn the IN I knob to 2 oʼclock For pro audio line level signals 2V turn the IN I knob to 4 oʼclock For r...

Page 3: ...yboard can create a range of sounds DISTORTION There is built in distortion clipping circuit built in to the module that allows for additional tones Turning up the channel one knob I while the other channels are turned down II VII will create a basic distortion squaring effect on the inputs Pulse width generation can be achieved by applying a triangle sine or sawtooth VCO to the input and applying...

Page 4: ...complex and unpredictable tones Also control voltages may be applied to either the IN I or IN II jacks but because they arenʼt scaled for CV control the output signal may disappear completely when the CV signal is high Similarly audio rate inputs will work on the CV input but at a lower level While it wasnʼt specifically designed for this purpose in mind triangle wave LFOs can be multiplied using ...

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