VST State Models

At the lowest level, NI VSTs use two separate instrument drivers—NI-RFSA and NI-RFSG—to control the signal analysis and generation functionality, respectively, of the instrument. The underlying state model of each driver informs how you should construct programs to make use of your VST.

The state model determines what actions you can program the instrument to take in each state and tells you how to progress through the states when programming your instrument to build a successful program.