Stencil

Stencil emits MIDI notes from a shift register. On each host step it reads the register as an integer, maps the value into a user-set MIDI note range, and emits the note with probability density. Then it shifts one position — the bit cycling out is flipped with probability 1 − lock before being reinserted at the head. Lock at 1.0 freezes the register into a perfect loop; at 0.0 every bit flips and the register becomes pure noise. Intermediate values gradually mutate the loop, and 0.95 is the classic slowly-evolving-pattern setting.

Stencil isn’t a sequencer you draw notes into. The pattern emerges from initial randomness, and you shape it by holding lock high when a section you like comes around. The trigger mode selects how steps advance: auto follows the host transport, gate advances only while a key is held, and seed lets incoming note-on / note-off events write the head bit so the player becomes the bit source. Stencil emits unquantized chromatic notes; chain a Pointsman device downstream for scale-locked output.