Selectable ensemble effect in an electronic musical instrument

摘要

A keyboard operated electronic musical instrument is disclosed which has a number of tone generators which are assigned to actuated keyswitches. The tone generation is produced by sequentially and repetitively accessing a memory containing a set of data points which define a period of a preselected musical waveshape. Apparatus is described whereby a plurality of tone generators are implemented such that each has an ensemble tone effect created by adding together a number of composite tones. Each tone generator is implemented by selecting a corresponding set of data points read out of the memory. The selection logic is controlled by select gates and a comparator which is responsive to the frequency of an associated actuated keyboard switch.