Abstract: When sound parameters defining a selected element among plural elements constituting a sound are edited, a predetermined schematic display of the entire elements constituting the sound is made and, also, a particular part of the schematic display corresponding to the selected element in a special form is made about the selected element for emphasizing it. An operator can thereby recognize easily for which part of element in the entire sound structure he is currently making the parameter editing. In response to designation of a desired object of editing by the operator, plural possible candidates of edition processings corresponding to the designated object are displayed. Upon selection of one of the plural processings by the operator, the selected editing processing is automatically performed.

Abstract: In a device which excites an oscillating signal in a closed loop containing a delay circuit and a filter so as to synthesize a sound of pitch corresponding to the total delay time in the closed loop, arithmetic operations are performed in the closed loop, in response to a change in a color controlling coefficient caused during generation of the sound, for interpolating delayed output signals from plural points in the loop having different delay time. This interpolation compensates for a variation in the signal delay time in the closed loop resultant from the change in the filter coefficient, to allow the entire closed loop to provide such a total delay time that excites oscillation corresponding to a desired pitch. The closed loop also includes first and second filters.

Abstract: A tone signal control system for controlling a tone signal supplied from a tone generator. The tone signal control system includes a CPU for executing a computational and control operation in accordance with an externally stored program, a DSP for executing a computational and control operation in accordance with an internally stored program, a memory accessible by both CPU and DSP, and an access controller for controlling an access by CPU and DSP to the memory. The access controller calculates a logical product of a clock signal, an access signal from CPU, and an access signal from DSP, and outputs the logical product as a CPU wait signal. The tone signal control system is not required to increase the number of pins too many even if CPU and DSP are assembled on a single chip.

Abstract: Electronic musical instrument comprises a musical tone synthesis device, a memory and pitch control device. The musical tone synthesis device processes input signals based on at least one parameter, and synthesizes and outputs musical tones with pitches in accordance with the values of the parameters. The memory stores initial values of the parameters which generate a musical tone having a target pitch. The pitch control device detects a difference between the target pitch of the musical tone and a pitch of the musical tone outputted form the musical tone synthesis device. And, the pitch control device outputs a value of the parameter which will eliminate the difference to the musical tone synthesis device.

Abstract: The musical tone synthesizing apparatus is mainly configured by a closed loop which at least provides a delay circuit and an all-pass filter. The delay circuit delays an input signal (e.g., excitation wave signal) by a first delay time corresponding to a certain integral number of sampling periods. The all-pass filter functions to at least delay an output of the delay circuit by a second delay time corresponding to a decimal fraction of the sampling period, so that an output of the all-pass filter is fed back to the delay circuit. The whole delay time of the closed loop consists of the first and second delay times which can be respectively controlled. Thus, a musical tone signal representing a synthesized musical tone (e.g., an attenuating sound which is produced from an percussion instrument) is picked up from the closed loop. Incidentally, the whole configuration of the closed loop can be embodied by a digital signal processor (DSP).

Abstract: An electronic musical instrument: is provided to perform an active control on the pitch of the musical tone to be generated, thereby simulating the pitch-rising phenomenon to be occurred in the performance of a non-electronic musical instrument such as a wind instrument, percussion instrument and stringed instrument. In case of the simulation of the wind instrument, this electronic musical instrument is mainly configured by an excitation-vibration circuit and a tube simulation circuit which are connected together by means of a junction. The tube simulation circuit is configured by a closed-loop circuit in which plural delay circuits and junction circuits are connected together in cascade-connection manner. Herein, the delay circuits simulate the propagation delay of the air-pressure wave to be transmitted through the tube of the wind instrument, while the junction circuits simulate the scattering manner of the air-pressure wave at the points at which the diameter of the tube is changed.

Abstract: An electronic musical instrument includes a plurality of tone generating substrates, a connection portion, a channel detector and a channel assigner. Each of the plurality of tone generating substrates has at least one tone generation channel which generates a tone signal in response to assignment information input thereto. The connection portion has a plurality of connection slots with which the tone generating substrates are connected. The channel detector detects a number of all the tone generation channels of the tone generating substrates connected with the connection portion. The channel assigner, responsive to performance information input thereto, assigns the performance information as assignment information to one of the tone generation channels detected by the channel detector. The assigned tone generation channel generates a tone signal in accordance with the performance information.

Abstract: A method of detecting localization of an acoustic image, in which an acoustic impulse is emitted from a sound source to a dummy of a human head, an acoustic sensor is provided to a portion of the dummy's ears, and the response waveform is received by the acoustic sensor. This enables the detection of what effects are derived from interruption, reflection, and the like of a tone due to the human head. The received response waveform is analyzed and parameters for an acoustic image localization system are obtained. The acoustic image localization system comprising a delay circuit, a filter and an amplification controller sets the parameters into the delay circuit, the filter and the amplification controller, so that the detected localization of an acoustic image is reproduced.

Abstract: An electronic musical instrument includes an excitation signal generating device, a plurality of loop circuits and a coupling circuit. The excitation signal generating device generates an excitation signal in accordance with musical tone designating information. Each of the plurality of loop circuits at least delays an input signal in response to the musical tone designating information and repeatedly circulates the input signal therein. The excitation signal generated by the excitation signal generating device is supplied to at least one of the plurality of loop circuits as an input signal. The coupling circuits couples the plurality of loop circuits in accordance with a predetermined coupling form. At least one signal circulated in at least one of the plurality of loop circuits is output as a musical tone signal to be generated. The electronic musical instrument further includes a memory circuit which stores a plurality of coupling forms.

Abstract: A desired sound signal that is input from outside is amplitude-modulated or frequency-modulated with a signal of a predetermined characteristic which is generated from a signal generating source. A frequency characteristic controlling circuit controls the frequency characteristic of the modulated sound signal in accordance with a characteristic of a tone to be generated, and it outputs the controlled signal as a tone signal.

Abstract: A musical tone synthesizing apparatus provides a time-varying signal processing circuit the transfer function of which gradually varies over time in order to gradually vary over time the tone color of a synthesized musical tone. A number of time-varying signal processing circuits are presented. An interpolation-type-time-varying signal processing circuit is provided with interpolators for interpolating control parameters generated based on a desired musical tone, a signal processing circuit carrying out a signal operation based on the interpolated control parameters on an input signal incomming thereto.

Abstract: The present invention provides a signal delay circuit for substantially steplessly changing a delay interval. The signal delay circuit is composed essentially of a delay controller, a first delay circuit, and a second delay circuit. The delay controller generates and outputs control data consisting of a real number bearing control information for controlling the delay interval, the real number consists of an integral portion and a fractional portion. The first delay circuit receives an incidental signal, delays the incidental signal for creating a first intermediate signal, and outputs the first intermediate signal, the first intermediate signal being delayed with respect to the incidental signal by an interval which is a product of a predetermined cardinal interval and the integral portion of the real number.

Abstract: A musical tone waveform signal forming apparatus comprises a waveform signal transmission section, a musical tone control signal input section and a pitch control section. The waveform signal transmission section comprises a plurality of signal transmission units which are connected in cascade one by one and each of which comprises first and second signal lines respectively serving as forward and backward paths of a waveform signal and a node portion for feeding back an output from the first signal line to an input side of the second signal line. At least one of the first and second signal lines serves as a signal delay line.

Abstract: A musical tone waveform signal forming apparatus having a modulation function comprises a delay loop system including a delay circuit and a filter, a excitation signal input section, a control member and a filter characteristic control circuit. The excitation signal input to the delay loop system circulate therein, so that a musical tone signal is formed. The control member instructs modulation of a musical tone signal. The filter characteristic control circuit changes with time the characteristics of the filter in accordance with an output from the control member. So that pitch modulation accompanied with tone color modulation is effected.

Abstract: An electronic musical instrument includes an excitation circuit, a closed loop circuit, a characteristics analysis circuit and a control circuit. The excitation circuit generates an excitation signal in response to performance information. The closed loop circuit causes the excitation signal inputted from the excitation circuit to circulate thereabout musical tone signal. The closed loop circuit also has a delay circuit for delaying the musical tone signal for a predetermined time. The characteristics analysis circuit analyzes an input signal and generates a control signal corresponding to the result of the analysis of the input signal. The control circuit controls characteristics of the musical tone signal circulating in the closed loop circuit in response to the control signal. The musical tone signal circulating in the closed loop circuit is then outputted therefrom as a sound signal.

Abstract: The present invention provides a signal delay circuit for substantially steplessly changing a delay interval. The signal delay circuit is composed essentially of a delay controller, a first delay circuit, and a second delay circuit. The delay controller generates and outputs control data consisting of a real number bearing control information for controlling the delay interval, the real number consists of an integral portion and a fractional portion. The first delay circuit receives an incidental signal, delays the incidental signal for creating a first intermediate signal, and outputs the first intermediate signal, the first intermediate signal being delayed with respect to the incidental signal by an interval which is a product of a predetermined cardinal interval and the integral portion of the real number.

Abstract: A musical tone waveform signal forming apparatus comprises a delay loop circuit, a filter circuit a drive signal generation circuit and a modulation control circuit. The drive signal generation circuit inputs a drive signal to the delay loop circuit so that a musical tone is formed in the delay loop circuit. The filter circuit filters the musical tone. The modulation control circuit changes the delay length of the delay loop circuit and the characteristics of the filter circuit thereby adding a modulation effect on the musical tone to be generated.

Abstract: A resonant effect apparatus for an electronic musical instrument includes a plurality of resonant tone signal forming channels for forming a plurality of resonant tone signals different in their resonant frequency characteristics when applied with a musical tone to be generated and a plurality of acoustic conversion systems for acoustically converting each of the resonant tone signals to issue the converted resonant tone signals therefrom. In the resonant effect apparatus, a supply condition of the resonant tone signals to the acoustic conversion systems is controlled for control of a sound localization of the resonant tone signals.

Abstract: The musical tone synthesizing apparatus simulating the wind instrument synthesizes a musical tone signal to thereby generate a musical tone corresponding to the wind instrument tone. Herein, the musical tone synthesizing apparatus contains one or more stages each including a bi-directional transmission circuit and a junction. In each stage, the progressive wave signal is delayed by the predetermined delay time and transmitted to the junction. The junction multiplies the signal by first coefficient, whereby the result of multiplication is transmitted to the next stage. The junction also multiplies the progressive wave signal by second coefficient, whereby the result of multiplication is fed back to the prior stage. The first and second coefficients are changed over according to an operation of a tone hole to be provided in the wind instrument. Thus, the musical tone of the wind instrument can be simulated with simple circuit or software.

Abstract: An electronic musical instrument which produces counter melody automatically selects one from among chord constituting tones in a predetermined priority order and produces a tone of the same note as the selected tone as a counter melody tone. This electronic musical instrument further comprises a chord type detector for detecting a chord type of a performed chord besides a chord designation detector for detecting the fact that the chord has been designated, a counter melody tone determining circuit for selecting one from among the chord constituting tones and sound system for producing the counter melody tone. The predetermined priority order is determined in accordance with the detected chord type. This dependence on chord type make it possible to produce a counter melody tone which is more rich in music.