Electronic musical instrument

Claim 2

An electronic musical instrument comprising first means for producing harmonic components inclusive of a fundamental wave; second means for generating amplitude coefficients respectively corresponding to said harmonic components; means for multiplying an output of said first means with an output of said second means to obtain products; means to synthesize said products for forming a musical tone; said second means comprising means for generating at least one increment value, and means for repeatedly accumulating the increment value thus generated, thereby obtaining a plurality of values which constitute ordinate values of a plotted line as depicted by a graph, said plotted line being a frequency characteristic curve, said obtained values defining amplitude coefficients for said harmonic components; harmonic information generating means for generating harmonic information representing pitches of respective harmonic components which form a musical tone to be generated; harmonic reference information generator means for generating harmonic reference information representing a pitch; comparator means for sequentially comparing an output of said harmonic information generating means and an output of said harmonic reference information generator means; and means responsive to an output of said comparator means for selecting one of said increment component generating means.

Claim 3

An electronic musical instrument according to claim 1 wherein each one of said harmonic components is generated on a time division basis, and said accumulating means comprises means for accumulating said increment value in synchronism with the generating of said harmonic components, and means for setting an initial value of accumulation.

Claim 4

An electronic musical instrument according to claim 1 wherein said increment value generating means comprises means for varying with time the increment value.

Claim 5

An electronic musical instrument according to claim 2 wherein said increment value generating means comprises a plurality of means for generating different increment values, and a selector for selecting one of said increment value generating means, and wherein said means for setting the initial value of accumulation comprises an initial value setting means for each said increment value generating means.

Claim 6

An electronic musical instrument comprising first means for producing harmonic components inclusive of a fundamental wave; second means for generating amplitude coefficients respectively corresponding to said harmonic components; means for multiplying an output of said first means with an output of said second means to obtain products; and means to synthesize said products for forming a musical tone; said second means comprising means for generating at least one increment value, and means for accumulating the increment value thus generated, thereby forming amplitude coefficients that define a frequency characteristic curve for said harmonic components, each one of said harmonic components generated on a time division basis, said accumulating means including means for accumulating said increment value in synchronism with the generation of said harmonic components, and means for setting an initial value of accumulation, said increment value generating means including a plurality of means for generating different increment values and a selector for selecting one of said increment value generating means, said means for setting the initial value of accumulation including an initial value setting means respectively corresponding to each said increment value generating means, said selector including harmonic information generating means for generating harmonic information representing pitches of respective harmonic components which form a musical tone to be generated, a harmonic reference information generator for generating a harmonic reference information representing a pitch, comparator means for sequentially comparing an output from said harmonic information generating means and an output of said harmonic reference information generator, and means responsive to an output of said comparator means for selecting one of said increment component generating means.

Claim 7

An electronic musical instrument comprising first means for producing harmonic components inclusive of a fundamental wave; second means for generating amplitude coefficients respectively corresponding to said harmonic components; means for multiplying an output of said first means with an output of said second means to obtain products; and means to synthesize said products for forming a musical tone; said second means comprising means for generating at least one increment value, and means for accumulating the increment value thus generated, thereby forming amplitude coefficients that define a frequency characteristic curve for said harmonic components, each one of said harmonic components generated on a time division basis, said accumulating means including means for accumulating said increment value in synchronism with the generation of said harmonic components, and means for setting an initial value of accumulation, said increment value generating means including a plurality of means for generating different increment values and a selector for selecting one of said increment value generating means, said means for setting the initial value of accumulation including an initial value setting means respectively corresponding to each said increment value generating means, said selector including harmonic information generating means for generating harmonic information representing pitches of respective harmonic components which form a musical tone to be generated, a harmonic reference information generator for generating a harmonic reference information representing a pitch, comparator means for sequentially comparing an output from said harmonic information generating means and an output of said harmonic reference information generator, and means responsive to an output of said comparator means for selecting one of said increment component generating means.

Claim 8

An electronic musical instrument according to claim 5 wherein said harmonics reference information generator comprises means for varying with time said harmonic reference information.

Claim 9

An electronic musical instrument according to claim 5 wherein said harmonic reference information comprises an order number of said harmonic components.

Claim 10

An electronic musical instrument according to claim 5 wherein said harmonic reference information is an information representing a harmonic frequency.

Claim 11

An electronic musical instrument comprising first means for producing harmonic components inclusive of a fundamental wave; second means for generating amplitude coefficients respectively corresponding to said harmonic components; means for multiplying an output of said first means with an output of said second means to obtain products; and means to synthesize said products for forming a musical tone; said second means comprising means for generating at least one increment value, and means for accumulating the increment value thus generated, thereby forming amplitude coefficients that define a frequency characteristic curve for said harmonic components, said harmonic components being generated on a time division basis at a first clock rate and said accumulating means accumulating said increment values at a second clock rate slower than said first clock rate thereby generating respective ones of said amplitude coefficients, said accumulating means including means for setting an initial value of accumulation each time the amplitude coefficient for said fundamental wave is generated, a buffer memory device inputted with and storing said amplitude coefficients generated by said accumulating means, and means for reading said stored amplitude coefficients from said buffer memory device at said first clock rate at timings respectively corresponding to the generation of said harmonic components.

Claim 12

An electronic musical instrument comprising first means for producing harmonic components inclusive of a fundamental wave; second means for generating amplitude coefficients respectively corresponding to said harmonic components; means for multiplying an output of said first means with an output of said second means to obtain products; and means to synthesize said products for forming a musical tone; said second means comprising means for generating at least one increment value, and means for accumulating the increment value thus generated, thereby forming amplitude coefficients that define a frequency characteristic curve for said harmonic components, said harmonic components being generated on a time division basis at a first clock rate and said accumulating means accumulating said increment values at a second clock rate slower than said first clock rate thereby generating respective ones of said amplitude coefficients, said accumulating means including means for setting an initial value of accumulation each time the amplitude coefficient for said fundamental wave is generated, a buffer memory device inputted with and storing said amplitude coefficients generated by said accumulating means, and means for reading said stored amplitude coefficients from said buffer memory device at said first clock rate at timings respectively corresponding to the generation of said harmonic components.