Korg - Volca Modular

A semi-modular analog synthesizer that makes modular synthesis more accessible and understandable than ever before.

Creating new sounds that don’t exist in the outside world is an unending dream which has continued since the birth of electronic musical instruments. This dream has evolved and expanded throughout the development of new and unique music production devices.
The popularity of modular synthesizers around the world has generated new excitement and interest in the so-called "West Coast style" of synthesis that deviates from traditional synthesis norms.
The compact body of this volca synth features eight modules and 50 patch points. While learning the basics of a modular synth, you can use popular features of the volca synthesizer line to control a unique and different flavor of analog sounds.

An analog synth composed of modules

Eight modules
The volca modular is a semi-modular synthesizer consisting of independent analog synth modules, digital effects, and a sequencer. Each of the modules has been carefully selected for its stand-alone completeness. The modules are internally connected so that sound can be produced even before connecting the included pin cables, and the routing is shown by white lines on the panel. Module connections via a pin cable take priority over the internal connections, bypassing them.

SOURCE
This consists of a triangle VCO carrier and a modulator. The complex overtones generated by FM modulation are sent through a wave folder circuit to add additional overtones, producing a distinctive sound. This module is important in determining the basic character of the sound of volca modular.

FUNCTIONS
This section consists of two function (envelope) generators. In addition to an AHR generator with attack, hold, and release, there's a Rise-Fall generator, also known as a slope generator, which not only applies time-varying change to the sound but also lets you patch the end trigger out back into the trigger in as a loop, making it usable as a VCO or LFO.

WOGGLE
This is a random signal generator containing a sample & hold circuit that uses pink noise as its source. Two outputs are provided, allowing it to output either stepped or smooth random noise.

SPLIT
This module distributes one input to two outputs. It can also be used in the reverse direction, combining two control or audio signals into one.

DUAL LPG
This consists of two low-pass gate circuits. Typical of the West Coast style of synthesis, the module packages a filter with an amp, allowing the brightness and volume of the sound to vary together.

UTILITY
This is a mixing scaling module that combines two signals in various ways. It can mix not only audio signals but also control signals, as well as inverting or attenuating those signals.

SPACE OUT
This is a stereo module that applies a reverb-like effect to the audio signal.

SEQUENCES
This module is for connecting to the internal sequencer. You can set the tempo, and select different rhythm divisions to output via the gate counter.

A fusion of West Coast style in a volca format

Analog synthesizers in which a simple oscillator such as a saw wave or square wave is modified by a filter are referred to as "East Coast style" because of their origin from well-known American manufacturers. Synths of this style, as exemplified by the MS-20, have continued to evolve toward a goal of being used in many mainstream musical genres, thus being equipped with a keyboard for performance. Their sounds are notable for sharp filters and rich presence, and can be heard in many well-known songs.
Synthesizers of the "West Coast style" evolved in a uniquely different direction from such musical developments. Pursuing the freedom that is inherent to electronic musical instruments, these were based on oscillators such as FM modulation which generated numerous overtones, and used random and complex control signals and low-pass gate circuits to vary tonal character and volume, so that slight movement of a knob might dramatically transform the sound. While their potential was acknowledged, the resulting sound and its changes were difficult to predict, causing these synths to be used in a more experimental capacity.
For these reasons, hardware products of this style have been few in number. However, recent years have seen the popularity of modular synths such as Eurorack, as well as DAW plugin instruments that resurrect classic bygone synths of the past. This world-wide movement toward embracing interesting sounds has received renewed attention, spurring a new look at the sounds of this style.
Starting from analog, and freely taking in all elements including FM and PCM, the volca series has also focused on this trend. And now, this distinctive "West Coast style" sound has been added to the KORG volca series.

Patching allows infinite possibilities

volca modular’s modules are connected via the included pin cables, allowing a diverse range of combinations. The unit's compact chassis provides 50 patch points. Inputs and outputs are color-coded for recognition at a glance, and the signals are also marked by symbols to indicate audio, control, gate or trigger. Normally, each signal is connected according to its use, but on the volca modular, signal levels are universally compatible between modules, allowing hidden possibilities to arise from patching that defies common sense. Twenty pin cables are included, and also included is a reference sheet explaining each patch point and providing basic examples of patching.