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mod 4

modular4_Roland_Kuit Roland_Kuit_Xite-1
photography (right): karin schomaker

Some albums I have created with this system:


Some AM testing:

Modular synthesis    Modular synthesis    Modular synthesis    Modular synthesis
AM Mod/Demod module and RM             Amplitude modulation                              Modulated by 2 Lfo modules                     AM and phase modulation
Testing the Chaos modules on AM:

Modular synthesis

Adding Harmonics
Sinewave - Cheby mixed into 16 harmonics- random mixed, Creating formants.
Sonic Core Modular IV synth and Flexor modules:

Phase Distortion

Phase distortion synthesis is a synthesis method introduced in 1984 by Casio in its CZ range of synthesizers, and similar to phase modulation synthesis in the sense that both methods dynamically change the harmonic content of a carrier waveform by application of another waveform (modulator) in the time domain. Casio introduced the term 'phase distortion':

Modular synthesis


Rich timbres by creating pulse trains. 2 Modular IV and 2 NMG2 voices:

Modular synthesis


Tuning the tube:
Perry Cook, Stanford edu

Click Generator-Comb filter feedback test:
Modular synthesis
Sonic Core Modular modules

Wave terrain
The Modular IV synthesizer contains 6(!!!) Terrain oscillators to make complex waveforms
CZ oscillators for X and Y input:

Modular synthesis   WT 1  WT2

Wave Terrain Synthesis is realized by the combination of two independent structures for generating sound signals. A trajectory signal (or orbit) and a terrain function. The trajectory is used to create a ‘path’ of coordinates that are used to read from a function of n variables f (x1,x2,…xn) , the terrain function. Most implementations use terrain functions of two variables f (x,y) but such systems can be creatively expanded into more dimensions.

Complex forms can be patched:

Modular synthesis

Wave Animation and Terrain Synthesis

Modular synthesis

Feedback experiment between separate devices

Modular IV out - SC Plate X - SC Plate X- and back to Modular IV.
Again, the xMod/Fb module is needed


Other tricks

The Envelope Generator as oscillator:

Modular synthesis

The 'tuning', in this case, can be done by the A, H and D sliders.

Creating patterns
Cascaded Sample & Hold modules with a double feedback loop.
The Pseudo-Random Sequencer, or LFSR

Modular synthesis

More fun with logic

Shaping waves by logic word scrambling:

Modular synthesis

Here, the J9K DAC and ADC modules are used.


The phase of of a waveform is a mighty weapon in designing sound.

How to build a Harmonic Phase Oscillator:

Modular synthesis
Applying a LFO will shift phase automatic:

Modular synthesis

To make things more interesting, we apply a second LFO. This one is freq. modulated by LFO 1.
The amplitude of LFO 2, and thus its effect is modulated by LFO 1:

Modular synthesis

Creating your own harmonic phaser

Modular synthesis

Use and misuse of modules

In modular synthesis there is no misuse if it works for you!

Modular synthesis    Modular synthesis
Animated control values                     Terrain control values

he weird sync

This patch has the feel of strange kind of Phase lock loop Synthesis:

Moular synthesis

Soft sync

Soft sync can be done by comparison:

Moular synthesis



Free counters!    
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