摘要:
The present invention consists in a method and electronic device used to reproduce the sound of church organ flue pipes, by taking advantage of the physical modeling technique of acoustic instruments; it being an audio-digital synthesis system based on digital signal processors, which contains a programme of physical simulation of the generation of the sound of organ flue pipes.
摘要:
An efficient digital waveguide synthesizer is disclosed for simulating the tones produced by a non-linearly excited vibrational element coupled to a resonator, such as in a piano. In a preferred embodiment, the synthesizer creates an excitation pulse from a table containing the impulse response of a piano soundboard and enclosure. Alternatively, this excitation pulse can be synthesized by filtering white noise. The excitation pulse is fed into a filter that simulates the collision of the piano hammer and string. Because the hammer-string interaction is nonlinear, the characteristics of this filter vary with the amplitude of the tone produced. The filtered excitation pulse is then fed into a filtered delay line loop which models the vibration of a piano string. Because the excitation pulse already contains the effects of the resonator, the tone produced by the delay line loop does not require additional filtering in order to model the resonator.
摘要:
A tone generation system includes one or more digital waveguide networks coupled to one or more junctions, one of which receives a control signal for controlling tone generation. The control signal initiates and interacts with a wave signal propagating through the waveguide networks to form a tone signal. A non-linear junction may be employed which receives a signal from a waveguide, converts it in accordance with a non-linear function based upon the value of the control signal and provides it back to the waveguide. A tone signal whose pitch is determined by the wave transmission characteristics of the waveguide network is thereby produced.
摘要:
In order to simulate sounds of an acoustic musical instrument such as a bowed stringed instrument, an electronic musical instrument employs a musical tone control apparatus which at least contains an operating device and a detecting circuit. Herein, when operating the operating device which can be operated in a two-dimensional area, the detecting circuit detects operation information corresponding to an operating position or an operating displacement of the operating device. Then, velocity information is generated based on the operation information. Thereafter, a musical tone is generated in response to a musical characteristic corresponding to the velocity information under a condition where the operating device is now operating. Preferably, the operating device is configured by a digitizer on which surface an electronic pen is moved two-dimensionally by the performer. Thus, it is possible to impart the varied performance expression to the musical tone to be generated.
摘要:
The musical tone synthesizing apparatus utilizes a loop circuit receptive of an input signal for looping the same with a given delay time to produce an output signal representative of a musical tone. The loop circuit includes a delay element for delaying the input signal and a feedback path for feeding back the delayed input signal to the delay element. A control unit is provided for controlling the delay element according to a designated pitch of a musical tone so as to set the delay time of the loop circuit to thereby determine the pitch of the musical tone. A generator generates the input signal containing various frequency components. A high-pass filter is connected precedingly to the loop circuit for selectively attenuating relatively lower frequency components of the input signal, which have periods longer than the set delay time of the loop circuit.
摘要:
An acoustic wind instrument having a conical tube is simulated by two cylindrical tubes communicated to each other at each one end. A parallel connection of electrical signal transmission lines, each simulating a cylindrical tube constitute a synthesizer synthesizing the sound of the conical acoustic wind instrument. Each signal transmission line includes a shift register for giving a delay to the input signal, a multiplier for simulating sound reflection, and a filter for affording a tone color. An exciting signal is injected at the interconnection of the parallel connection through a junction circuit.
摘要:
The musical tone synthesizing apparatus synthesizes a musical tone signal in response to the wind instrument and the like to thereby simulate a resonance tube providing with several sound holes each opened or closed by each finger of a performer. Herein, the input signal is delayed by the predetermined delay time, and then the predetermined operational process corresponding to the signal-scattering operation is carried out on the delayed signal. The coefficient used in this operational process is varied in response to the open/close state of each sound hole. Thus, the operation result can simulate the musical tone to be sounded from the resonance tube of the wind instrument and the like.
摘要:
Tone generation in conformity with the tone generating mechanism of actual rubbed string instruments is made to obtain musical tones rich in reality as generated by natural musical instruments. Performance information outputted from a performance manipulator is converted into tone generation parameter by parameter generating means. Excitation means generate an excitation signal corresponding to the string-rubbing style on the basis of the tone generation parameter. A loop circuit gives both acoustic and propagation delay of the string to the excitation signal to thereby generate musical tone signals.
摘要:
In controlling a sound source for an electronic musical instrument, an operation data of a performance operation member corresponding to musical tone control parameters of a musical instrument is corrected according to a tone generation region characteristic of the musical instrument. The corrected data is inputted to a sound source circuit of the electronic musical instrument thereby a musical tone approximating of the musical instrument is regularly generated. The electronic musical instrument comprises a performance operation member for outputting position and pressure data of an operation member, a sound source for receiving musical tone control parameters corresponding to those of a musical instrument and generating a musical tone simulating that of the musical instrument, and a conversion circuit for converting the position and pressure data to those in a normal tone generation region as the musical tone control parameters in accordance with a tone generation region characteristic based on the musical tone control parameters of the musical instrument. The conversion circuit is connected to the sound source.
摘要:
A musical tone synthesizing apparatus simulating a wind instrument includes an excitation circuit simulating a reed operation of a mouth piece portion, a resonance circuit simulating a resonance tube and a musical tone control circuit. The excitation circuit produces an excitation signal based on an input signal and a reflected wave signal transmitted from the resonance circuit. The excitation signal is input to the resonance circuit. The resonance circuit includes a bi-directional transmission circuit and a junction unit which is inserted into the bi-directional transmission circuit. The junction unit caries out a scattering operation corresponding to a scattering operation of compression wave of air which is occurred in the vicinity of the tone hole of the resonance tube. The excitation signal propagates through the bi-directional transmission circuit in a forward direction as a progressive wave signal. Then, a signal which is occurred by a scattering operation of the junction unit and the like propagates through the bi-directional transmission circuit in a backward direction as foregoing reflected wave signal. The signal operation of the resonance circuit, i.e., the delay time required for circulating the excitation signal through the closed-loop including the excitation circuit at least is controlled by the musical tone control circuit in response to an open/close operation applied to a tone hole so that musical tones which are generated by the non-electronic wind instrument having a plurality of tone holes are to be synthesized.