US 5,187,314 A · Musical tone synthesizing apparatus with time function excitation generator

Abstract

A musical tone synthesizing apparatus generates musical tones by simulating the tone generation construction of a plucked-stringed instrument or string-striking type stringed instrument. The apparatus has a closed-loop circuit which simulate a tone generating element of the instrument, an excitation circuit which creates an excitation signal corresponding to the excitation given to the tone generating element in response to the time function. The time function is set in response to operational information of the tone generating operator. The excitation signal is supplied to the closed-loop circuit and circulates around closed-loop circuit and is delayed by a delay circuit having delay interval, and is fed back into the excitation circuit as the state of the tone generating element. By displacing the excitation signal within the predetermined range of time function, the digital computation may not be in the overflow state when computing the relative displacement between the tone generating element and the tone generating operator, and thus control stability of the excitation circuit can be obtained.

Claims12

Dependent claims

A musical tone synthesizing apparatus for synthesizing sound of an acoustic musical instrument, said acoustic musical instrument comprised of a tone generating element and a tone generating operator for exciting sai dtone generating element to thereby create reciprocally propagating vibration within said tone generating element, said musical tone synthesizing apparatus comprising:

(a) closed-loop means including delay means which delays a signal inputted thereto by a delay time corresponding to a period of reciprocal propagation vibration in the tone generating element of said acoustic musical instrument;
and
(b) operational information generating means for generating operational information designating generation of a tone;
(c) function generating means for generating a time function, whose value varies with a lapse of time, corresponding to the operational information;
(d) modification means for receiving and modifying a feedback signal outputted from the closed-loop means;
and
(e) excitation means for generating an excitation signal based on the time function and the modified feedback signal and for providing the generated excitation signal to the closed-loop means as an input signal, wherein the musical tone to be generated is extracted from the closed-loop means.

4 more elements

Dependencies are inferred from the claim text.

Musical tone synthesizing apparatus with time function excitation generator

Life of this patent

Musical tone synthesizing apparatus with time function excitation generator

Life of this patent

Abstract

Claims12