Semi-autonomous: partially self governing; acting independently to some degree.
Since there doesn't seem to be much around which fuses together both these concepts together, tried doing so with 'Chaosorus'. The phase of a sine oscillator is perturbed by two small functions:

The parameter values of these functions set the initial conditions:
Omega (on the GUI: Havoc)
k (on the GUI: Bedlam)
s (on the GUI: Disorder)
and depending on the values, a variety of sounds are produced ranging from rhythmic noise to glitch effects to pitch gliding tones and chiptune-like melodies.
The delta is simply an increment added by each key on the keyboard to the initial condition set by Omega, so that as one plays up and down the keyboard, one is greeted with a different sound-set at each key
What makes it semi-autonomous is that although you don't initially know what you'll get across the keyboard for the various parameter values, the same settings will produce the same results, so you can actually compose something with what it creates. In other words, at its heart is a process that generates self-organized sound, yet it lets you 'organize' the sound sequences in the traditional composition sense. As demonstrated in this video: