38. A process, as claimed in claim 37, wherein the step of generating clock pulses comprises the steps of generating first beat tempo clock pulses during a first beat of the bar and second beat tempo clock pulses during a second beat of the bar, dividing the parameter signals into a first group corresponding to the first beat and a second group corresponding to the second beat, generating the first group during the first beat tempo clock pulses irrespective of the harmony selected, generating the second group during the second beat tempo clock pulses in the event there is no change in the selected harmony between the first and second beats, and for generating the first group during the second beat tempo clock pulses in the event there is a change in the selected harmony between the first and second beats.
37. A process, as claimed in claims 23, 24, 25 or 27 and further comprising the step of generating clock pulses defining a time duration of a musical bar in which the accompaniment notes occur and dividing the bar into a predetermined number of musical beats.