User Guide

Basic Features

Basic Communication

The central grid of 64 square buttons and the 8 right-hand round buttons send note data to the

host. A note-on message with maximum velocity is sent when the button is pressed, and a note-

on message with velocity 0 when released.

Note-on messages can also be used to light the LED behind each button. The velocity of the note-

on message determines the colour of the LED.

A note-on message with velocity 0, or a note-off message of any velocity will turn the LED off.

The top row of round buttons send control change messages to the host, where the controller

number is the address of the button. Pressing the button sends a control change message with a

value of 7Fh (127) and releasing sends the value as 0. Similarly, they will light when a control

change message is received with the controller value determining the colour of the LED.

Max patch: LPMK2_Basic_Communication.maxpat

This patch introduces basic messages to and from Launchpad MK2,

decomposing each message and displaying it in the console

window. It also shows Session, User 1 and User 2 layouts.

Colours

Launchpad MK2 has a colour palette of 128 colours shown in figure 2. Colour 0 turns the LED off.

Max patch: LPMK2_Colours.maxpat

This patch provides two methods of lighting the

whole of Launchpad MK2 in a variety of colours.

Figure 2: Launchpad MK2 colour table