Well, how does the Launchpad map to the printer? The first two rows each represent the sixteen characters of the ASCII table starting with "!". These characters can be either strung together into 'phrases' that are printer out all at once, or they can be triggered so that each character is printed individually. The third row contains predefined 'macro phrases' with specific rhythms. The first button of the fourth row controls whether the first two rows print immediately or are strung together as phrases to be printed together.