Drumstep

Drumstep is the direct drum-grid sequencer: one row per familiar kit voice and one square per step. The compact view keeps ten core drum roles in reach, while the 16-lane view adds ride, high tom, congas, tambourine and shaker. A dark square is silent, a colored square is a hit, and the brighter capped state is an accent.

The rows follow the General MIDI percussion map, so kick is note 36, clap is 39, snare is 38, closed hat is 42 and the rest line up with hardware pads, drum tracks and standard MIDI files. Drumstep produces those notes and leaves the sound entirely to the connected instrument.

Division is relative to the shared session clock. At 1/16, four squares pass per beat; changing to 1/8 or 1/32 changes the grid rate without introducing another tempo that can drift away from the transport.

Playback follows the shared transport position whenever the host runs. Preview auditions the pattern on a private clock without starting or stopping the parent timeline, and immediately yields when the host begins playback.

The editable grid is pattern state, not automation. Division, Swing and fixed MIDI velocity are ordinary parameters, while the retained 32-step lanes remain a compact musical object owned by the sequencer. Solo and mute immediately change both the timeline emphasis and the MIDI output.