The SIG is...
not a traditional sequencer - it doesn’t repeat itself (unless you tell it to!)
not a probability sequencer - you don’t program fixed steps for variation
not a random source - you can control what it will do (within limits)
not a chaotic source - identical initial conditions don’t produce identical output
It's a unique 4 track instrument that responds to your probabilistic musical direction, but you don’t play ‘on’ it, you duet with it, by starting with the fundamental musical atoms and controlling how likely different pitch, duration, octave and transition events will be using its instrumental performance controls.