frequency numbers is contained in u s pat no 4 114 496 entitled 34 note frequency generator for a polyphonic tone synthesizer 34 this patent is hereby incorporated by reference the frequency number read out of the frequency number memory 12 is stored in the frequency number latch 13 in response to timing signals produced by the clock 15 the frequency number contained in the frequency number latch 13 is successively added to the content of an accumulator contained in the adder accumulator 14 the content of this accumulator is called the accumulated sum of a frequency number since the frequency number is less than or equal to the value one the accumulated frequency number will consist of an integer portion and a decimal portion the waveshape memory 20 stores a set of data points which are stored points defining a specified musical tone the memory address decoder 16 reads out data points stored in the waveshape memory 20 in response to the integer portion of the accumulated frequency number contained in the adder accumulator 14 the data points read out from the waveshape memory 20 are transferred to the adder 19 and to a plurality of data delays 21 24 while fig1 explicitly shows only 3 data delays any number n of such delays can be used each of the data delays 21 24 delays its input data for a different number of periods of the timing signals provided by the clock 15 at the end of the prespecified delay.