A row in buzz indicates a single line (or tick) of a pattern, in which an audible change may be made. This change may include a note on/off, a parameter change, or a trigger. The dots are simply blank areas where data may be added. In most cases this data is in the form of either 2, or 4 dots. These are the holding places for Hexidecimal values (Explained in a minute), which will most likely effect a parameter of the current machine. Thus, this explains why the patterns of every different machine have their own matrix of dot columns - the dots represent that machine's specific set of unique parameters.