Abstract: A musical instrument comprises a plurality of keys (10-19), a processor means (20) connected to said keys and arranged to provide an output signal to be utilized in the generation of notes. A data storage means (22) is connected to said processor means (20) and contains a set of data (22a) associated with each key (10-10), each set of data including a predetermined sequence of pitch values. Each time a key (10-19) is struck the processor means (20) reads an item of data in sequence from the data set (22a) and generates an output signal that includes a consecutive one of said pitch values.