The Korg 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.
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 the Korg volca modular.
This section consists of two function (envelope) generators. In addition to an ADH 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.
This is a stereo module that applies a reverb-like effect to the audio signal.
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.
Connectors that allow synchronized performance and external control with the Korg Volca Modular
With a sync jack that allows easy connection to a Korg groove machine, you can connect the Korg volca modular to another volca series unit, a minilogue, monologue, or prologue, an electribe, or the SQ-1, and enjoy sessions with the sequencer synchronized to the playback.
The CV IN jack for external control is a TRS mini stereo jack that lets you input two signals. The left channel can input a ±5V signal and the right channel can input a signal of 1V/oct (0–+6V) signal which is internally converted to pitch CV within the volca modular. Of course, each of these two signals can also be patched to control a module.