Built-in Piano Roll

The step grid is the fastest way anyone has invented to write rhythm, but rhythm isn't the whole job. An 808 line needs pitch. A melody needs more than on and off. A hat roll wants subdivisions finer than the step size, and some hits only groove when they sit just off the grid.

In most drum plugins, that's where the workflow breaks: you export MIDI, open your DAW's editor, and suddenly the drums live in two places. TrapMan keeps everything in one: every lane opens into its own piano roll, inside the plugin, still looping while you edit.

What it is

The piano roll is linked to the selected lane. Select the 808 lane and the roll shows the 808's notes; select the hats and you're editing hats. It's not a second sequencer to keep in sync: the grid and the roll are two views of the same part, and an edit in one is an edit in both.

A velocity lane runs along the bottom, so dynamics live in the same view as the notes. And because the roll is per-lane, every sound gets a clean editing space instead of one giant roll where kicks, hats and 808s fight over the same rows.

How to use it

1. Select the lane you want to edit. The roll follows the selection, so you're always looking at the sound you clicked. No hunting for the right track.
2. Write the part. Place notes where you want them and set their lengths. For an 808, this is where the line gets actual pitches instead of one root-note thud; for a melody or a vocal chop, same story.
3. Shape the velocity lane underneath so the part breathes: lean on the downbeats, ghost the notes in between.
4. Stay on the keys. Select notes and use the shortcuts below for the edits you make a hundred times a session.

The shortcuts that make it fast

• Cmd+U: subdivide the selected notes by the current grid. One hat note becomes a perfectly tight roll; set a finer grid and hit it again for a faster one. This is the hat-roll trick, and it works on any lane: snares into fills, 808s into bounces.
• Cmd+Arrows: nudge the selection by the grid. Walk an 808 note through the bar until it locks against the kick.
• Cmd+Shift+Up/Down: move the selection a full octave. The classic sub drop is one keystroke down.
• Cmd+A, then Delete: grab everything, clear it, start the part over.
• Cmd+Z / Cmd+Shift+Z: undo and redo, so none of this is precious.

The complete list, with the workflow behind it, lives in keyboard shortcuts.

Grid or roll? A simple rule

Use the grid when the question is when: kicks, snares, claps, the hat bed. The grid shows the whole bar as a shape and every edit is one click.

Use the roll when the question is what: the pitch of an 808 line, the length of a note, a roll faster than the step size, a hit pushed slightly off the grid. If the part has melody or micro-timing in it, it's a roll part. If it's pure rhythm, stay on the grid: that split is the reason grids won drums in the first place, and the history behind that is worth two minutes.

Rhythm at grid speed, pitch and nuance in the roll, one lane at a time, without leaving the plugin.