Abstract: An effect imparting device is constructed such that effects of a first kind which are different from each other are imparted to at least two of a plurality of musical tone signals transmitted via a plurality of channels. At least two of the musical tone signals are mixed. An effect of a second kind is imparted to the resulting signal. The effect imparting device is adapted to bypass at least one of effect-imparting blocks. An electronic musical instrument can change one of the effects of the first kind corresponding to a tone color of at least one of the musical tone signals transmitted via the channels simultaneously when the tone color is changed, while changing of an effect of the second kind is inhibited. A plurality of output terminals are provided through which the musical tone signals of the channels and to which effects have been imparted can be output to an external device, in a manner independent of each other.

Abstract: In the waveform processing apparatus of the present invention, an original sound signal is divided into a plurality of bands, parameters such as amplitude and frequency are extracted for each band, and correction is made so that the amount of deviation of the parameters from the mean value thereof is gradually decreased to zero from a certain time to the time when the repetition period begins, whereby a musical tone signal is re-synthesized based on the corrected parameters. The electronic musical instrument which stores the waveforms processed by the apparatus of the present invention generates musical tones having more natural tone color change.

Abstract: A four-operator sound synthesis integrated circuit comprises a first through a fourth sound synthesis operator, a first programmable multiplier connecting the output of the first operator to the input of the second operator, a second programmable multiplier connecting the output of the second operator to the input of the third operator, a third programmable multiplier connecting the output of the third operator to the input of the fourth operator, a fourth programmable multiplier connecting the output of the first operator a first input of a four-input adder, a fifth programmable multiplier connecting the output of the second operator a second input of the four-input adder, a sixth programmable multiplier connecting the output of the third operator a third input of the four-input adder, and a seventh programmable multiplier connecting the output of the fourth operator a fourth input of the four-input adder. The product of the combination is taken from the output of the four-input adder.

Abstract: A touchscreen interface for a sound processing system, such as music synthesizers, which has a display panel and a touch sensitive panel overlying the display panel, includes an icon which represents an adjustable parameter used by the processing system. The processing resources supply a variable adjustment display to the display panel in response to a touch on the position of the icon, using pop-up slider or pop-up knob motif. The variable adjustment display overlies the interface display and has a size on the touch sensitive panel larger than the size of the icon to facilitate manipulation of the variable using a finger over a significant range of values. The variable adjustment display pops up when touched to obscure a portion of the graphical display used for the interface. When the variable is adjusted using the touch sequence, the variable adjustment display is removed, and the interface display is left unobscured.

Abstract: An in-vehicle drum simulator and mixer for enabling an automobile passenger to create and overlay percussive sounds onto the audio portion of a radio, tape player, cassette disk player, and the like. One or a plurality of touch sensors distributed in selected locations within the vehicle provide electronic input signals upon impact to a drum simulator which generates an output signal in relation to the particular impacted touch sensors. An audio mixer receives the drum simulator output signal and an output signal form the radio, or the like audio signal source, and overlays the drum sounds onto the radio output signal. Thus, the passenger can actively play along with the radio.

Abstract: A sound processing apparatus has a volume control circuit for controlling sound volume and a register storing plural values specifying attenuation levels. The register values are determined to linearly correspond to the rate of change of the attenuation level.

Abstract: A sound source is composed of a plurality of chips of integrated circuits, into which a sound source circuit and an effector circuit are integrated. In a chip of integrated circuit, a waveform signal generated by the sound source circuit within the integrated circuit itself is compounded with a waveform signal generated by other sound source circuit in other chip of integrated circuit, and the resultant signal is applied with effect by the effector circuit.Further, in a chip of integrated circuit, a waveform signal generated by the sound source circuit within the integrated circuit itself is compounded with a waveform signal generated by other sound source circuit in other chip of integrated circuit, and the mixed signal is applied with effect by the effector circuit, and further the effect added signal is transferred to the above other chip of integrated circuit, thereby the signal being applied with other effect.

Abstract: A musical tone synthesizing apparatus at least comprises two loop circuits. Each loop circuit delays an input signal thereof by a delay time corresponding to a tone-pitch period of a musical tone to be produced while circulating the input signal therethrough. When the loop circuits are connected in series, an excitation signal is applied to one loop circuit, while an output signal of one loop circuit is supplied to another loop circuit. Then, the excitation signal is mixed together with the output signals of the loop circuits, so that a musical tone signal representing a synthesized musical tone is generated. The excitation signal is generated by mixing a noise signal and a musical-tone-waveform signal. When simulating the violin sounds, the noise signal is made based on a frictional sound which is caused due to a friction between a string and a bow. Incidentally, a filter can be provided to perform a filtering operation on each of the excitation signal and the output signals of the loop circuits.

Abstract: A sound effect-creating device frequency-modulates a monaural original sound signal obtained from stereophonic sound signals, delays the resulting modulated signal by delay amounts different from each other, selects and adds up a combination of a plurality of delayed modulated signals to form signals to be added to the stereophonic sound signals, and outputs the resulting stereophonic sound signals.

Abstract: A tone generator for an electronic musical instrument is fundamentally configured by a drive-waveform creating portion and a closed loop. The drive-waveform creating portion creates a drive-waveform signal by mixing an excitation waveform and a noise waveform together. The drive-waveform signal is applied to the closed loop through an adder. The closed loop contains a plurality of feedback paths, each of which at least contains a delay circuit and an all-pass filter. The adder adds all of output signals of the feedback paths together with the drive-waveform signal so as to produce a musical tone signal. The number of delay stages, representing an amount of delay to be used in each delay circuit provided in each feedback path, is designated in response to a delay ratio which is arbitrarily set.

Abstract: A musical tone waveform signal generating apparatus in which a waveform signal is circulated to generate a musical tone waveform signal. The apparatus includes an excitation portion for mixing an excitation control signal with the waveform signal and for non-linearly converting the mixed waveform signal and a signal transmission portion coupled with the excitation portion to feed back the converted waveform signal to the excitation portion with delay of a predetermined time for causing on the converted waveform signal a resonance frequency corresponding with a pitch of a musical tone to be generated.

Abstract: Synthesizer models for emulating musical instruments are improved to take into account sympathetic string vibrations. One embodiment of the present invention scales an output signal from a sound synthesis model and uses the scaled signal as an input signal for a number of single-string emulations causing the single-string emulations to produce sound signals corresponding to sympathetic string vibrations. The output signals from the synthesis model and from all of the single-string emulations are added together. Another embodiment employs an octave's worth of single-string emulations to emulate the lower strings of an emulated instrument. Still another embodiment is a synthesizer which includes an input bus for accepting a sound signal, scaling means, a plurality of single-string emulations, and means for summing output signals from the string emulations. Embodiments preferably employ waveguide synthesis or the plucked string model to emulate single-strings.

Abstract: A musical tone waveform signal generating apparatus in which a waveform signal is circulated to generate a musical tone waveform signal. The apparatus includes an excitation portion for mixing an excitation control signal with the waveform signal and for non-linearly converting the mixed waveform signal and a signal transmission portion coupled with the excitation portion to feed back the converted waveform signal to the excitation portion with delay of a predetermined time for causing on the converted waveform signal a resonance frequency corresponding with a pitch of a musical tone to be generated.

Abstract: A sound effect-creating device amplitude-modulates a monaural original sound signal obtained from stereophonic sound signals, delays the resulting modulated signal by delay amounts different from each other, selects and adds up a combination of a plurality of delayed modulated signals to form signals to be added to the stereophonic sound signals, and outputs the resulting stereophonic sound signals.

Abstract: A sound synthesis process. The invention relates to an additive sound synthesis process, as shown in FIGS. 1A and 1B, in which sample blocks (16) are determined by performing the inverse Fourier transform of successive frequency spectra. The time-superimposed sample blocks (16) are added in order to form a sequence of samples representing the reconstituted sound wave.

Abstract: An emphasize system for an electronic musical instrument including filter and control device. The filter extract and output predetermined frequency range component of an input musical tone signal. The control device control the level of an output from the filter at least on the basis of an output from an envelope generator which controls the level of the input musical tone signal, or on the basis of the level of another frequency range component of the input musical tone signal. At least the level controlled signal is outputted from the system.

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: A sound processing system comprises a waveform distributor for distributing an input sound waveform, offset devices for executing an offset process for each of the waveforms received from the waveform distribution device, and a multiplication and addition device for multiplying the offset waveforms by predetermined coefficients and then adding the multiplied waveforms. Since the distributed waveforms are offset by the independent offset devices, highly varied sound can be produced by changing the coefficients of the offset devices and the multiplication and addition device, and also by changing these coefficients as time elapses.

Abstract: An electronic sound processor creates reverberation effects using a simulated impulse function. The simulated impulse response is generated by combining frequency bands of white noise. The power of each band decays exponentially in time. The time constants are generated from the characteristics of a real or imaginary listening space. A reverberated sound signal is generated from an original sound signal by convolution of the original signal and the simulated impulse response. The method can adapted to generated stereophonic signals and to generate a forward and inverse reverb effect using only one set of multiplications.

Abstract: Disclosed are a method and apparatus for analyzing an input vocal signal to produce a plurality of harmony signals that are combined with the input vocal signal to produce a multivoice signal. The method makes a current estimate of the fundamental frequency of the input vocal signal and determines if the current estimate is the correct estimate of the fundamental frequency. If the current estimate is correct, a reference note is assigned to correspond to the current estimate and a plurality of harmony notes are selected to correspond to the reference note. The method then generates a plurality of harmony signals by scaling the input vocal signal with a piecewise linear approximation of a Hanning window to extract a portion of the input vocal signal and by replicating the extracted portion at a plurality of rates equal to the fundamental frequencies of each of the harmony notes. The plurality of harmony signals and the input vocal signal are combined to produce the multivoice signal.

Abstract: A musical tone synthesizing apparatus generates musical tones by simulating the tone generation construction of a plucked-stringed instrument or percussion type stringed instrument. The apparatus has a plurality of closed loop circuits which simulate each tone generating element of the instrument, an excitation circuit which creates an excitation signal corresponding to the excitation given to the plurality of tone generating elements in response to the operation of a tone generating operator or the operational information of the tone generating operator, and a memory which stores a non-linear relation between the tone generating elements and the tone generating operator such as a hammer. The excitation signal is supplied to each of the closed loop circuits and circulates around each closed loop circuit and is delayed by means of a delay circuit having delay interval, and is fed back into the excitation circuit as the state of the tone generating elements.

Abstract: There are disclosed an apparatus adapted to generate musical information of a synthetic sound in accordance with the MIDI (Musical Instrument Digital Interface) standard to carry out PCM (Pulse Code Modulation) recording of a natural effect sound including natural sound and/or a human voice such as back chorus to mix them to generate musical accompaniment, thus to mix a voice of singing sung with the musical accompaniment, and a recording medium used for such an apparatus.

Abstract: A musical tone waveform signal generating apparatus in which a waveform signal is circulated to generate a musical tone waveform signal. The apparatus includes an excitation portion for mixing an excitation control signal with the waveform signal and for non-linearly converting the mixed waveform signal and a signal transmission portion coupled with the excitation portion to feed back the converted waveform signal to the excitation portion with delay of a predetermined time for causing on the converted waveform signal a resonance frequency corresponding with a pitch of a musical tone to be generated.

Abstract: A musical sound waveform generator includes a carrier signal generating unit, a modulation signal generating unit, a mixing controlling unit and a waveform outputting unit. The characteristics of the carrier signal from the carrier signal generating unit are determined such that the musical sound waveform generated by the waveform outputting unit is a sine wave or a cosine wave with a single frequency, where the mixing ratio of the modulation signal is made O by the mixing controlling unit. Therefore, the mixing controlling unit presets the mixing ratio of the modulation signal to be O, making it possible to generate a musical sound waveform which is only a sine wave or a cosine wave of a single frequency. During the performance, the mixing ratio can, for example, be determined at a high value immediately after the start of sound generation and thereafter reduced to near O with time.

Abstract: A PCM digital audio signal playback apparatus is provided for extracting from the digital audio signal read out from a recording medium an original signal component ranging lower than 1/2 of its sampling frequency fs, producing a harmonic from the original signal component, extracting a harmonic component ranging higher than fs/2 from the harmonic, and adding the harmonic component to the original signal component. Accordingly, a high-frequency carrying signal, e.g. an impulse, is processed without causing ringings in the waveform response.

Abstract: A musical tone synthesizing apparatus is designed to simulate the acoustic sounds of non-electronic musical instruments. In the non-electronic musical instrument providing the resonator such as the piano and guitar, the produced acoustic sound contains three kinds of sounds, i.e., a direct sound, a resonant sound and a transient sound. Herein, the direct sound is produced directly by playing the instrument, the resonant sound is produced from the resonator based on the direct sound and the transient sound is produced when the impulse to be occurred by playing the instrument propagates through the resonator. Thus, signals simulating these sounds respectively are mixed together so as to produce the synthesized musical tone signal, which well-simulates the acoustic sound.

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: The musical tone synthesizing apparatus simulating the musical tones of a natural musical instrument such as a piano. The apparatus contains a closed-loop circuit for simulating the vibration mechanism of the strings and a excitation circuit for generating excitation signals to the closed-loop circuit, so that the excitation circuit simulates the hammer striking the string. The apparatus also contains a scaling coefficient generating circuit for generating and supplying scaling coefficients to the excitation circuit, where the scaling coefficients represent the influence rate corresponding to the influence to be applied to the hammer by the string. In the excitation circuit, the excitation signals are multiplied by the scaling coefficients so that a slight difference of tone color is applied to the excitation signals with respect to tone pitch (or each key).

Abstract: An object of the present invention is to provide an electronic musical instrument which can generate a plurality of tones in spite of the inexpensive and simple structure thereof and can correct the quantity of phase delay of a closed loop in a physical model tone generator without use of any special processor such as a high-speed CPU or a dedicated numerical operation processor, not only to thereby attain performance effects of echo, chorus and the like but to simulate a performance style of repeating the operation of one string or key in the condition in which a tone corresponding to the string or key remains, without production of noise even when parameters for constituent elements of the physical model tone generator are respectively changed widely. The electronic musical instrument includes a driving waveform for storing a plurality of driving waveform data corresponding to performance information in advance, and a closed loop constituted by a shift register and a low-pass filter.

Abstract: Disclosed are a method and apparatus for analyzing an input vocal signal to produce a plurality of harmony signals that are combined with the input vocal signal to produce a multivoice signal. The method makes a current estimate of the fundamental frequency of the input vocal signal and determines if the current estimate is the correct estimate of the fundamental frequency. If the current estimate is correct, a reference note is assigned to correspond to the current estimate and a plurality of harmony notes are selected to correspond to the reference note. The method then generates a plurality of harmony signals by scaling the input vocal signal with a piecewise linear approximation of a Hanning window to extract a portion of the input vocal signal and by replicating the extracted portion at a plurality of rates equal to the fundamental frequencies of each of the harmony notes. The plurality of harmony signals and the input vocal signal are combined to produce the multivoice signal.

Abstract: A digital tone mixer includes a first digital volume regulator electrically connected to a first tone generator and having a binary signal output corresponding to the desired amplitude of a pulsating tone signal from the first tone generator; a second digital volume regulator electrically connected to a second tone generator and having a binary signal output corresponding to the desired amplitude of a pulsating tone signal from the second tone generator; a binary adder for summing the binary signal outputs of the first and second volume regulators; and a pulse rate modulator receiving a binary output from the binary adder and generating a pulse train which has a pulse density corresponding to the binary output of the binary adder. The digital tone mixer has a very stable output characteristic.

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: An electronic musical instrument having selectable monaural, stereo and multiple channel musical performance capability is disclosed which includes a performance data generating device; tone signal generating systems; sound producing systems; a mode indicating device; a selection device; and a distribution device. The tone signal generating systems generate musical tone signals based on performance data generated by the performance data generating device. The sound producing systems produce musical sounds based based on the musical tone signals. The selection device allocates performance data to a single musical tone signal generating system when the mode indicated by the mode indicating device is the first mode. The selection device allocates performance data to plural musical tone generating systems when the mode indicated by the mode indicating means is the second mode.

Abstract: 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.

Abstract: A musical tone synthesizing device employing an operator, for generating musical tone signals by a modulation operation process. The device also employs a waveguide combined to the operator, for generating a reciprocating signal including a delay circuit for delaying the signal inputted into the waveguide feedback path, and for feeding back the output signal of the delay means to the signal, reciprocating within the waveguide.

Abstract: A musical tone synthesizing apparatus synthesizes musical tones by simulating the tone generation construction of a plucked-string or struck-string instrument. The apparatus has a loop circuit which simulates a vibrating element of the instrument, an excitation circuit creates an excitation signal corresponding to the excitation given to the vibrating element in response to the operation of operators such as a pick or a hammer or the state of the generation body and a memory which stores a non-linear relation between the operator and the vibration element. The excitation signal circulates around the loop circuit and is delayed by means of a delay circuit with a previously determined delay interval, and is fed back into the excitation circuit as the state of the vibrating element.

Abstract: A musical tone parameter generating method and a musical tone generating device of this invention feature that when data inputted by a player is inputted into a neural network as input pattern, the neural network infers the parameters necessary to specify a musical tone wave form to be formed. This makes it possible to get parameters other than those stored in a memory by inferring, which increases variation of the musical tone to be generated.

Abstract: A musical tone synthesizing apparatus is disclosed wherein an excitation signal corresponding to performance data is generated and supplied to a loop circuit. In the loop circuit, this excitation signal is delayed for at least a fixed time period and a repeatedly circulating muscial tone signal is generated. At the beginning of the generation of this musical tone signal, a initial signal with a frequency which corresponds to the pitch of the generated musical tone is supplied. As a result of this, in the loop circuit, resonant operation is carried out quickly in accordance with the initial signal.

Abstract: A musical tone waveform signal generating apparatus is used to generate the waveform signal full of variety which simulates the sound waveform of wind instrument. This apparatus provides a loop including first and second signal lines through which the waveform signal is circulated. Both of first and second signal lines are connected to a conversion portion which receives the waveform signal from the second signal line and a musical tone control signal which is used to control a musical parameter of a musical tone to be generated. The conversion portion effects the predetermined non-linear conversion on the waveform signal in response to the musical tone control signal so that a converted waveform signal to be obtained from the conversion portion is to be outputted to the first signal line.

Abstract: A carrier signal generating unit generates a carrier signal. A modulation signal generating unit generates a modulation signal. A mixing controlling unit controls, in mixing the modulation signal with the carrier signal, a mixing ratio of the modulation signal to the carrier signal and outputs a mixed signal in which the modulation signal and the carrier signal are mixed in the controlled mixing ratio. A waveform outputting unit has a predetermined functional relation between its input and output and receives the mixed signal from the mixing controlling unit to provide a modulated musical sound waveform. In this case, the carrier signal and the modulation signal are set such that a desired musical sound waveform is obtained from the waveform outputting unit when the mixing ratio of the modulation signal to the carrier signal is controlled by the mixing controlling unit to a predetermined mixing ratio. And the present invention provides a method of setting the carrier signal and the modulation signal.

Abstract: A tone generating apparatus is provided with the same number of tone signal generating circuits as a polyphonic number, each of which generate multiple tone-component signals having a relatively long tone-ON time and combine the signals to produce a tone signal, and is also provided with the same number of tone signal generating circuits as a predetermined number smaller than the polyphonic number, the latter circuits each generating a tone-component signal having a relatively short tone-ON time. With this arrangement, when tone generation is specified by depression of a key, for example, generation of a musical tone having a relatively long tone-ON time is assigned to one of the former tone signal generating circuits, and, at the same time, generation of a musical tone having a relatively short tone-ON time is assigned to one of the latter tone signal generating circuits, thereby generating a single tone signal.

Abstract: An output stage for a multitimbral electronic musical instrument providing automatic detection of the use of submix outputs is provided. The present invention allows the use of effects processors on selected timbres without the need for user intervention when the effects are connected or removed. The present invention also allows for use of such processors without an external mixboard.

Abstract: An electronic tone generator in which a plurality of types of scale data and tone-length data are stored in an associative arrangement at predetermined addresses in a single storage device. The plurality of types of scale data read from the single storage device are input to corresponding waveform generators, where melody-waveform signals are generated. The melody-waveform signals generated in the respective waveform generators are mixed and synthesized by a mixer before being output from an output device. The waveform generators are adapted to switch envelope waveforms generated by envelope-waveform generators of a digital circuit configuration with waveform signals corresponding to the scale data, thereby obtaining melody-waveform signals.

Abstract: An electronic musical instrument having a plurality of operators for generating audio frequency waveforms and performing frequency modulation thereof. The operator comprises a wave generator, a phase generator, and an amplitude-envelope generator. The phase generator produces phase-angle data on the basis of frequency-number data modulated by ratio-of-frequency data. While the frequency-number data is common to all operators, ratio-of-frequency data varies independently of those applied to the other operators. This enables operators to create rich, dynamic, lifelike sound. One or more operators are provided with feedback loops that are capable of varying the amount of the feedback in response to key touch, etc., thus achieving expressive tone. A pitch-envelope generator is provided with a random-number generator which modulates the pitch envelope in a random manner to more closely simulate a performance on a real musical instrument.

Abstract: A digital electronic musical instrument for synthesizing a musical waveform by computing high harmonics. The musical instrument includes a musical waveform generator, an overflow detection circuit and a data selection circuit. A musical waveform is preferably added at an adder which outputs an added musical waveform. This output added musical waveform is checked to determine if an overflow condition occurs. A data selection circuit receives the added musical waveform and establishes level limited data and non level limited data. The data selection circuit selects the level limited data upon occurrence of an overflow condition and selects non level limited data when no overflow condition exists.

Abstract: There are provided first and second tone signal generation channels for respectively generating tone signals having waveshape characteristics corresponding to parameters assigned thereto. Tone color change control information such as key touch data is applied to a parameter assigning circuit. The parameter assigning circuit selects two parameters from among three or more parameters which are different from one another and assigns the selected two parameters to the first and second tone signal generation channels respectively. Tone signals having different characteristics, which are determined by the assigned parameters, are generated from the respective channels. The tone color change control information is further applied to an interpolation circuit connected to the first and second channels. The interpolation circuit interpolates the generated tone signals in accordance with the tone color change control information. A result of the interpolation is outputted as a tone signal for a tone to be produced.