Electronic musical instrument having variable frequency dividers

An electronic musical instrument having a keyboard comprising:

• code generating means responsive to the operation of each of the keys on said keyboard for generating a first code indicating a pitch tone and a second code indicating an octave associated with the operated key, said first code including an odd number signal and an even number signal respectively indicating that an integer by which the frequency of said master clock pulses is divided is odd or even;
• an oscillator for generating master clock pulses at a constant frequency;
• a first variable frequency divider presettable to a first count value which is variable as a function of said first code for dividing the frequency of said master clock pulses by counting the same and generating a first divider output when said first count value is reached, said first variable frequency divider comprises:
• first counter means including a series of interconnected counter stages presettable to said first count value for counting said master clock pulses and generating an output pulse when said first count value is reached;
• second counter means for counting said master clock pulses upon a first occurrence of said output pulse for resetting said counter stages to said first count value when a first predetermined additional value is counted and upon a second occurrence of said output pulse for resetting said counter stages to said first count value when a second predetermined additional value is counted, there being a difference of one count between said first and second predetermined additional values in the presence of said odd number signal and there being no difference therebetween in the presence of said even number signal;
• and
• bistable means responsive to said output pulse for generating said first divider output at a first voltage level in response to the first occurrence of said output pulse and at a second voltage level in response to the second occurrence of said output pulse;
• a second variable frequency divider responsive to said first divider output and presettable to a second count value which is variable as a function of said second code for dividing ' the frequency of said first divider output by counting the same and generating a plurality of pulse trains having octave frequency relationship;
• and
• digital-to-analog converting means for converting said pulse trains into an analog signal.