Semi-modular

The components of a semi-modular synth – such as the oscillator, filter and amplifier – are pre-wired behind the front panel in what the manufacturer considers to be a typical, logical way. However, they also provide patch points either to access some of its functions (such as the individual waveform outputs of the oscillator) to send to other modules, or to override that pre-wiring. Many who are new to modular synthesis dip their toe in the water by getting a semi-modular synth, and then expanding it with additional modules.