What Is a Video Synthesizer?

A video synthesizer is an electronic instrument that generates or processes video images in real time. A modular video synthesizer is a collection of small devices — modules — mounted into a shared enclosure.

Each module performs a distinct function: shape generation, color mixing, keying, sync, and so on. You choose which modules to install, so the instrument is highly configurable. You can buy a pre-configured system or build one up module by module over years.

Modules connect to one another with patch cables. The arrangement of cables defines how the synthesizer behaves — a modular synth is patch programmable rather than preset-driven.

This patching method rewards experimentation. Unlike software-based image-making, patching a modular synth is tactile and performable: it sits closer to painting, filmmaking, and live music than to a timeline-based editor. Design, composition, and performance happen in the same gesture.

For the technical rules of the instrument — signal ranges, connectors, sync — see Standards. For vocabulary, see the Glossary.