A shift register full of random bits goes round and round; the leading byte is read as a note, quantized to your key. One knob — change — sets the probability that the bit wrapping around gets flipped. At 0 the loop is locked and repeats forever. In the middle, the melody evolves: familiar, then suddenly not. At 1 every wrapping bit flips, which locks a loop of exactly twice the length. Loop ↔ evolve ↔ chaos, one knob — the trick the hardware Turing Machine module made famous.