A voltage-controlled oscillator (VCO) is an electronic oscillator whose output frequency is proportional to its input voltage. An oscillator produces a periodic AC signal, and in VCOs, the oscillation frequency is determined by voltage.

Voltage Controlled Amplifiers (VCA) control the amplitude of a signal passing through it by scaling or attenuating it in response to a separate control voltage input.

A filter is the most common tone-altering module in a modular synth. It typically reduces the strength of select harmonics or overtones, changing the tonal balance of a sound.

Envelope generators (EGs) are one common means of modulation in keyboard and modular synthesizers. They are your number one module (tool) towards subtractive synthesis.

Utility modules are considered as boring, but we think they are a building block for every modular synthesizer!

Low-frequency oscillation (LFO) is an electronic frequency that is usually below 20 Hz and creates a rhythmic pulse or sweep. It is used to modulate modular synthesizers!

Source of Uncertainty, or Random modules. Pretty random. Want to create ambient music on your modular synthesizer? These are some random modules we think you should look at!

Waveshaping is a term that is often used to describe particular types of distortion effects, yet the actual scope of this technique in the world of sound synthesis far exceeds this common understanding.

Erica Synths team of visionaries, engineers and musicians have been working hard to bring you modules and instruments that will set your modular system apart from mass in terms of how it sounds, looks and functions. Check them out and find what you are missing!

Delay effects bring out the best in your modular synthesizer performance.