Music – Instruments – Electrical musical tone generation
Patent
1991-02-28
1993-05-04
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
84662, G10H 700, G10H 102, G10H 500
Patent
active
052084159
ABSTRACT:
A fluctuation generator for use in an electronic musical instrument comprises uniform random generator for generating a random number having a uniform probability distribution, and a function circuit, which receives the random number from the uniform random generator and produces a random number MOD having a probability distribution according to a predetermined function. The function circuit may be constituted by a ROM. The fluctuation generator generates a tone signal in accordance with the random number MOD from the function circuit.
According to this fluctuation generator, the uniform random generator generates a random number having a uniform probability distribution, and sends it to the function circuit. The function circuit generates a random number in accordance with a function having a predetermined input/output characteristic to thereby generate a random number having a probability distribution close to the natural distribution (for example, a random number with the normalized distribution). A tone signal will be generated in accordance with this random number (for example, by adding the random number to a wave read frequency). A musical tone generated based on this tone signal should have fluctuation closer to the natural one.
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Adams Bruce L.
Donels Jeffrey W.
Kabushiki Kaisha Kawai Gakki Seisakusho
Shoop Jr. William M.
Wilks Van C.
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