Unit generator

[1] They are sometimes called opcodes (particularly in Csound)[2], though this expression is not considered accurate in that these are not written directly as machine-level instructions.

[citation needed] Unit generators form the building blocks for designing synthesis and signal processing algorithms in software.

[3] The unit generator theory of sound synthesis was first developed and implemented by Max Mathews[4] and his colleagues at Bell Labs in the 1950s.

ENV could be a unit generator that delineates a breakpoint function.

In the SuperCollider language, the .ar method in the SinOsc class[6] inherits methods from an overarching unit generator class (UGen)[3] that generates a sine wave.