The Faust opcodes allows access from within Csound to the Faust language. Faust (Functional Audio Stream) is a functional programming language for sound synthesis and audio processing: https://faust.grame.fr/.
The following opcodes are available:
faustaudio - Instantiates and runs a compiled Faust program.
faustcompile - Produce a instantiable DSP process from a Faust program.
faustdsp - Instantiates a Faust program.
faustctl - Adjusts a given control in a Faust DSP instance.
faustgen - Compiles, Instantiates and runs a compiled Faust program.
faustplay - Runs an instantiated Faust program.