Play it. Space run/stop · Shift+W pattern write · 1–8 select pattern · Z/X transpose.
Edit a step. Click the note to arm it, then drag up/down on the note face to set pitch — or hover a step and press a key on the A W S E D F T G Y H U J K row. ACC hits harder and opens the filter further; SLIDE glides into the next step and holds the gate open.
Knobs. Drag up/down, hold Shift for fine, double-click to reset.