Modulation matrix

Modulation options of a synthesizer

A modulation matrix is an internal, programmable control element in analog or virtual-analog synthesizers . It is used to link various modulation sources , such as LFOs or ADSR envelope generators, with specific targets such as the amplitude of the signal, the corner frequency of the filter or other parameters in the device. The sources and destinations are linked by means of a table that contains a number at the intersection that describes the effect of the modulating source on the destination. The type of sources and destinations available and the number of possible links depend on the synthesizer.

The modulation matrix simulates the wiring of various synthesis elements in a modular synthesizer . There there are no longer any permanent connections between the modules - in classic synthesizers, for example, the amplitude or the filter frequency is (only) controlled by a specific envelope generator .

Synthesizers with a modulation matrix that offers only limited possibilities are sometimes called semi-modular .