41. Apparatus, as claimed in claim 34, wherein the memory means comprises means for storing signals defining information about the musical parameters of instrumentation, duration and pitch.
34. A process, as claimed in claims 23, 24, 25 or 27, wherein the step of generating parameter signals includes the step of generating parameter signals that enable the accompaniment notes to sound in a plurality of different timbres and prevent the accompaniment notes from lying outside the range of any instrument being simulated by the timbres.