Abstract: When a low-pass filter 204 cuts a loud tone component from a waveform signal that soft and loud tone components are synthesized, and outputs a soft tone component signal, and a high-pass filter 205 cuts a soft tone component from the waveform signal that soft and loud tone components are synthesized, and outputs a loud tone component signal, the outputs at this time are switched on the basis of tone information (touch information, pitch information, tone color information, and the like).

Abstract: During a succession of working cycles, a sound synthesizer system for obtaining at an output a series of electrical samples produces first level samples from zero level samples which can come from diverse sources. The samples are produced allowing for parameters such as the frequency, amplitude, phase or a filter coefficient. All of the data used in establishing samples is processed in cells materialized by locations of a plurality of memories. The content of the cells can evolve from one working cycle to the other and data calculation means are used on a timesharing basis for all the cells. The first level samples can be selectively combined to form second level samples before they are transferred to an output.

Abstract: A music apparatus is constructed for producing a music sound while applying thereto a desired sound field effect according to a control parameter. In the music apparatus, a source device provides an input music sound composed of at least two sound components separable from each other. A multiplier device multiplies levels of the two sound components by different multiplication factors for undergoing a level change of the two sound components separately from each other. An adder device adds the two sound components with each other after the level change to produce an output music sound. An effector device applies the sound field effect to the output music sound according to the control parameter which characterizes the sound field effect. A controller device adjusts the respective multiplication factors according to the control parameter so that the levels of the two sound components can be regulated provisionally in matching with the sound field effect.

Abstract: A karaoke apparatus accompanies a vocal performance with a karaoke accompaniment reproduced according to karaoke data. In the karaoke apparatus, an input device separately converts a plurality of singing voices vocalized by different singers into respective ones of initial voice signals. At least one pitch sifter is utilized to shift a pitch of the initial voice signal to create a modified voice signal representative of a harmony voice made consonant to the singing voice. A distributor operates according to control information contained in the karaoke data to selectively distribute at least one of the initial voice signals to the pitch sifter so as to create the modified voice signal corresponding to the distributed initial voice signal. An output device selectively mixes the initial voice signals and the modified voice signal to reproduce the vocal performance composed of selected ones of the singing voices and the harmony voice in synchronization with the karaoke accompaniment.

Abstract: A MIDI-compatible gesture synthesizer is provided for use with a conventional music synthesizer to create musically realistically sounding gestures. The gesture synthesizer is responsive to one or more user controllable input signals, and includes several transfer function models that may be user-selected. One transfer function models properties of muscles using Hill's force-velocity equation to describe the non-linearity of muscle activation. A second transfer function models the cyclic oscillation produced by opposing effects of two force sources representing the cyclic oppositional action of muscle systems. A third transfer function emulates the response of muscles to internal electrical impulses. A fourth transfer function provides a model representing and altering virtual trajectory of gestures. A fifth transfer function models visco-elastic properties of muscle response to simulated loads. The gesture synthesizer outputs MIDI-compatible continuous pitch data, tone volume and tone timbre information.

Abstract: MIDI performance information is received via an operating system (OS) and an application-level software tone generator is driven on the basis of the received MIDI performance information, so as to allow the software tone generator to have an increased range of simple applications on the OS level. To this end, a fake driver is installed in the OS, and performance information output from application software is received by the fake driver via the operating system and then sent to the application-level software tone generator. As another example, the software tone generator is installed as a driver in the operating system so that information output from application software can be received by the software tone generator via the operating system.

Abstract: Basic tone waveform corresponding to a designated tone color and pitch is generated in each of a plurality of channels. Effect is imparted to the basic tone waveform in accordance with an algorithm for providing a predetermined effect, independently for each of the channels. The effect to be imparted is controlled in accordance with the designated tone pitch, separately for each of the channels. The effect impartment may be conducted using a processor, such as a DSP, executing a predetermined program containing a predetermined effect-imparting algorithm. In one example of the effect-imparting algorithm, a delay loop is employed through which an input exciting signal is circulated while being delayed, and an effect specific to an electromagnetic pickup of an electric guitar can be approximated by controlling the delay amount in the delay loop.

Abstract: A multi tone generator having a module for instructing a start of generating a musical tone signal, a module for designating a tone generator type for generating the musical tone signal, from a plurality of tone generator types; a module for performing a common process shared by the plurality of tone generator types, when the start of generating the musical tone signal is instructed; and a module for performing a process specific to the designated tone generator type, by using results of the common process.

Abstract: A parameter setting apparatus is provided in an electronic music instrument for editing a configure of parameters in accordance with a manipulation amount to set a tone generator which creates a desired timbre of musical tones upon setting. In the apparatus, a first memory device stores a first subset of parameters containing a Boolean parameter having a first Boolean value and a numerical parameter having a first numerical value. A second memory device stores a second subset of parameters containing the Boolean parameter having a second Boolean value and the numerical parameter having a second numerical value. An operating device provides a manipulation amount for editing parameters. An interpolating device interpolates the first numerical value and the second numerical value in accordance with the manipulation amount to determine an edited numerical value of the numerical parameter.

Abstract: A musical tone generating apparatus has a processing device that produces either musical tone synthesis parameters or musical tone waveform data corresponding to input performance data, depending upon a type of the input performance data. An encoder/decoder circuit includes a tone generator circuit that generates musical tone waveform data in accordance with the musical tone synthesis parameters produced by the processing device, a buffer circuit storing the musical tone waveform data produced by the processing device, a mixing circuit that mixes the musical tone waveform data produced by the tone generator circuit and the musical tone waveform data stored in the buffer circuit, and a conversion circuit that converts mixed musical tone waveform data generated from the mixing circuit into a musical tone signal.

Abstract: A musical sound synthesizing apparatus synthesizes plural-series overtones having different inharmonicity and amplitude level so as to generate a musical sound close to a natural sound. Inharmonicity coefficients K1 and K2 are read out for each overtone of different series in accordance with a timbre and a pitch, preferably modified according to a touch velocity, and then inputted to the first and second overtone frequency generators 19 and 20. Two series of overtones respectively computed in first and second overtone generators 21 and 22 on the basis of fundamental and overtone frequencies computed using of the coefficients K1 and K2, are controlled in its amplitude by the multipliers 25 and 26, and then synthesized so as to be outputted as a musical sound signal. In the multipliers 25 and 26, respective overtones are multiplied by amplitude coefficients Lk1 and Lk2 determined for each series in accordance with the touch velocity so that their amplitude levels are modified.

Abstract: The present invention discloses a digital processing device with smooth-clipping function and a digital musical tone synthesizing device using it. When one or a plurality of digital values are input to the digital processing device and a smooth-clipping mode is activated, an overflow during processing of the digital values is avoided as the internal resulting value of the device is scaled down before it is output. The scaling down of the internal resulting value is continuously increased in dependence on the increase of the value of the internal resulting value, such that an overflow is avoided. For example, if the digital processing device is performing a summation of two digital operands in a digital musical tone forming device, the time behavior of the resulting tone signal slope is smooth and thus the sound dynamics are improved and sound distortions are avoided during sound reproduction.

Abstract: For a given tone generating channel, tone waveform sample data corresponding to a plurality of sampling cycles (e.g., 100 samples) are arithmetically formed collectively. Once performance information such as MIDI event data is supplied to a tone generator MIDI driver from an application program such as a MIDI sequencer, the MIDI driver, in response to an input MIDI signal, assigns new tone generation to a designated tone generating channel of a tone generator task, and prepares tone controlling parameters to be set in the designated channel. The tone generator task arithmetically forms tone waveform data by use of the tone controlling parameters and passes the tone waveform data to a CODEC circuit functioning as an A/D converter. The program and a general-purpose operating system are sequenced and executed by a preemptive multitask management program. In this way, it is possible to reduce overheads involved in arithmetically forming tone waveform samples.

Abstract: To simulate sympathetic resonances for an electronic musical instrument, during the playing of free notes an excited notes, updating takes place of a first list (26) of free notes and their harmonics and of a second list (28) of excited notes ans their harmonics. At each activation of a free note, for each harmonic of said free note, is sought at least one identical harmonic of a note of the second list (28) and the playing of a sympathetic note is controlled with the pitch of each identical harmonic, and at each activation of an excited note, for each harmonic of said excited note, is sought at least one identical harmonic of a free note of the first lest (26) and the playing of a sympathetic note is controlled at the pitch of each identical harmonic.

Abstract: The number of waveform samples per unit time, i.e., waveform sample forming resolution is variably set depending on characteristics of a tone to be generated, such as construction of harmonic components in the tone. The number of waveform samples per unit time is increased for a tone or portion (e.g., attack portion) of a tone containing a relatively great number high-order harmonic components. Conversely, for a tone or portion (e.g., sustain portion) of a tone containing fewer high-order harmonic components, the number of waveform samples per unit time is decreased. By thus variably setting the waveform sample resolution, a process for arithmetically forming waveform sample data can be performed efficiently without involving significant waste. In cases where a plurality of tone generating channels are provided, the waveform sample forming resolution may be variably set independently for each of the channels.

Abstract: Digital waveform data stored in a waveform memory is read out in response to the ON/OFF operations of key switches such as a keyboard of an electronic musical instrument. The waveform data is passed through a low-pass filter, then subjected to amplitude envelope processing such as attack, decay, release, and the like. The processed waveform data is D/A-converted to output it as a tone signal. A look-up table that stores resonant frequency data and resonance sharpness data (quality factor) of a filter in correspondence with the touch (operation strength or key-ON velocity) of the switch operation at, e.g., the keyboard is used. The resonant frequency and resonance sharpness data are read out from the table in correspondence with the touch data of the keyboard operation to control filter characteristics such as a cutoff frequency, roll-off or slope, and the like, by coefficient data to the filter.

Abstract: A switching apparatus is constructed for discriminating a plurality of singing voices from each other based on a reference melody in order to pass the discriminated singing voices to different audio processes. In the apparatus, a plurality of input devices are provided to collect a plurality of singing voices separately from each other, each input device producing a voice signal which carries an individual melody of the singing voice collected by each input device. A plurality of output terminals are arranged to pass the voice signals separately from each other to the different audio processes. A switch circuit is disposed between the input devices and the output terminals to provide a plurality of electrical paths which are switchable with each other so as to distribute the voice signals from the plurality of the input devices to the plurality of the output terminals through the electrical paths.

Abstract: An audio synthesizer is disclosed for generating an analog or digital audio output in response to coded control instructions representing musical events, such as a MIDI data stream. The synthesizer has a general purpose computer portion with a CPU programmed to receive the control instructions and generate audio samples and a special purpose hardware portion for receiving the control instructions and generating the audio samples. The synthesizer also has a controller for directing the control instructions either to the general purpose computer portion or to the hardware portion to generate the audio samples; and means to combine the audio samples generated by the general purpose computer portion and the hardware portion to form an audio output which accords with the control instructions.

Abstract: A music apparatus is provided with a memory device that stores waveform data, and a sound device that has a plurality of tone generating channels, each of which is tuned in normal setting effective to process the waveform data retrieved from the memory device so as to generate a musical sound. An input device is placed in either of an active state for inputting external waveform data and an inactive state where the external waveform data is not inputted. A detector device is provided to produces a detection signal when the input device switches between the active state and the inactive state.

Abstract: In order to change an electronic sound between a piano sound generated without manipulation of a damper pedal and a piano sound generated under manipulation of the damper pedal, an electronic keyboard musical instrument assigns two tone generating channels to a depressed key for generating a fundamental tone signal representative of the piano sound generated by striking the set of strings and a resonating tone signal representative of a resonating sound generated through the resonance, and the resonating sound signal is mixed with the fundamental tone signal under manipulation of a pedal corresponding to the damper pedal, thereby making the electronic sound close to the piano sound.

Abstract: Disclosed is a programmable sound generator for generating digital outputs of tone and noise signals used for producing computer sound effects. The programmable sound generator includes at least two channels generating digital output serving as either tone signal or noise signal. A mixer is used to process the outputs of the channels in a digital, time-sharing manner. A volume controller coupled to the mixer is used to control the volume of the sound in a digital pulse width modulation (PWM) manner. Also, the volume controller allows its output to become floating when the programmable sound generator is not in use so as to allow another sound generating means to share the same sound transducing means. In the programmable sound generator, the tone generation and the noise generation share the same hardware, which allows low-cost production of the programmable sound generator.

Abstract: A karaoke apparatus mixes a live singing sound with a harmony chorus sound and an orchestral accompaniment sound. A first input terminal is connectable to a microphone to receive therefrom a first vocal signal representative of a first live singing sound. A second input terminal is connectable to another microphone to receive therefrom a second vocal signal representative of a second live singing sound which is different than the first live singing sound. A chorus generator is provided for processing the first vocal signal to generate a harmony signal representative of the harmony chorus sound which originates from the first live singing sound. A mixer is provided for mixing the generated harmony signal with the second vocal signal, which is not processed by the chorus generator, to provide a mix signal.

Abstract: Device for treating signals. A device for treating signals having multiple inputs for the reception of signals, including adjustable elements for the treatment of signals, wherein the adjustable elements are connected with control elements for control purposes, with the control elements being provided on a control surface, wherein, in order to provide better overview of the control surface, the control surface includes, for the treatment of signals, an image display for each adjustable element for the actual adjustment thereof, with the control surface including additional control elements and additional displays which can be selectively associated with one of the adjustable elements, with the device including connections between each adjustable element, the additional control elements and the additional displays.

Abstract: A music system is comprised of a subsystem and a main system. The subsystem includes a first musical tone-synthesizing device that synthesizes musical tones, based on performance data externally supplied thereto, and a mixing device that mixes together the musical tones synthesized by the first musical tone-synthesizing device and external musical tones externally generated and supplied thereto. The main system includes performance data-processing device that controls performance data indicative of musical tones to be performed and transmits the performance data to the subsystem at predetermined timing, and a second musical tone-synthesizing device that synthesizes musical tones, based on the performance data, when the first musical tone-synthesizing device is in a predetermined state. The main system transmits the musical tones synthesized by the second musical tone-synthesizing device to the subsystem, as the external musical tones.

Abstract: A tone synthesizer for complex tone modeling, synthesis, or reproduction for simple to complex instruments, both real and imagined. The tone synthesizer has a wave generator that is responsive to a key signal from a key signal generator to produce an analog or digital wave. The key signal corresponds to a discrete musical note value. A preferred digital wave generator for a digital tone synthesizer is a DSP with componentry to read from a digital memory, generally a large RAM, one or more previously recorded, or sampled, digital waveforms loaded to the RAM. The digital wave generators selectably respond to a key signal to produce a primary note output in the from of a digital wave, or to a sympathetic note signal from a sympathetic note signal generator to produce a sympathetic digital wave.

Abstract: In an audio signal processor, an input device inputs a polyphonic audio signal containing a plurality of melodic parts which constitute a music composition. A detecting device detects a particular one of the melodic parts contained in the input polyphonic audio signal. An extracting device extracts the detected melodic part from the input polyphonic audio signal. A harmony generating device shifts a pitch of the extracted melodic part to generate a harmony audio signal representative of an additional harmony part. An output device mixes the generated harmony audio signal to the input polyphonic audio signal so as to sound the music composition which contains the additional harmony part derived from the particular one of the melodic parts.

Abstract: The present invention relates to a tone signal generator. The tone signal generator includes first tone signal generation means for producing a dual-tone, multi-frequency ("DTMF") audio signal; second tone signal means for producing a plurality of non-DTMF audio signals; storage means for storing data that represents at least one channel of an output audio tone signal; and selection means for selectively loading the DTMF signal into the storage means and for selectively accumulating the non-DTMF signals into the storage means so as to generate the output tone signal.

Abstract: An additive sound synthesis process for generating complex, realistic sounds is realized in a computationally efficient manner. In accordance with one aspect of the invention, polyphony is efficiently achieved by dosing the energy of a given partial between separate transform sums corresponding to different channels. In accordance with another aspect of the invention, noise is injected by randomly perturbing the phase of the sound, either on a per-partial basis or on a transform-sum basis. In the latter instance, the phase is perturbed in different regions of the spectrum to a degree determined by the amount of energy present in the respective regions of the spectrum. In accordance with yet another aspect of the invention, a transform sum representing a sound is processed in the transform domain to achieve with great economy effects achievable only at much greater expense outside the transform domain. Other transforms besides the Fourier transform may be used to advantage.

Abstract: A sound effect imparting apparatus, which is employed in the electronic musical instrument in order to impart a variety of sound effects to the musical tones in a variety of manners, is mainly configured by an effect program memory, a sound-effect operation portion, a mixer and a mixing information supply portion. The effect program memory stores a plurality of effect programs, respectively corresponding to a plurality of sound effects to be imparted to musical tone data, in advance. The sound-effect operation portion performs arithmetic operations and/or logical operations on its input data in accordance with the effect programs read from the effect program memory, thus imparting desired sound effects to the musical tone data. The mixer receives the musical tone data, given from an external device, and operation data, outputted from the sound-effect operation portion, representing the musical tone data to which the sound effects have been imparted.

Abstract: An electronic musical instrument having a pitch designating unit capable of designating pitches of a plurality of tone signals to be generated, a plurality of tone signal generating channels for selectively generating and outputting a plurality of tone signals having a different pitch designated by the pitch designating unit, a mixing unit for mixing tone signals generated by the plurality of tone signal generating units, a plurality of resonance signal generating units each having a different resonance frequency characteristic, for receiving a mixed tone signal from the mixing unit and generating and outputting a plurality of different resonance signals, and an input level controller provided on the input side of the plurality of resonance signal generating units, for controlling a level of the mixed tone signal from the mixing unit for each resonance signal generating unit, in accordance with a pitch of each of a plurality of tone signals to be generated, and supplying the level controlled mixed tone signal

Abstract: The vibration of a vibratory element, caused by applying thereto a shock, is detected by a vibration sensor and provided as an electric shock signal to a resonance circuit. The resonance frequencies and resonance decay time of the resonance circuit can freely be adjusted. By setting the resonance frequencies and resonance decay time of the resonance circuit to arbitrary values, desired frequency components are extracted from the electric shock signal and output as a sound signal of an electronic musical instrument.

Abstract: An apparatus and method for digital mixing and sample rate conversion in a computer system is disclosed. The fully digital mixer of the present invention comprises: 1) a digital input receiver for receiving a plurality of digital data input signals and a corresponding plurality of input clock signals. The digital input receiver also receives an output clock signal. The digital input receiver further includes a data rate converter for converting the plurality of digital data input signals to a sampling rate corresponding to the output clock signal. The data rate converter produces a plurality of converted digital data output signals; 2) a digital filter unit coupled to the digital input receiver. The digital filter unit includes a plurality of digital filters for filtering the plurality of converted digital data output signals to produce a plurality of filtered digital data output signals; and 3) a digital blending unit coupled to the digital filter unit.

Abstract: A programmable identification panel used in conjunction with an audio mixing sound system. The identification panel includes a changeable visual display, such as a liquid crystal display, for identifying a specific instrument or sound that has been assigned to a particular channel on the audio mixing device. The invention is particularly useful to audio engineers in that it helps to distinguish channel identification for multiple musical configurations.

Abstract: A tone generator (501) for a musical synthesizer has digital waveform generators (602,603) arranged such that a proportion of an output from a waveform generator (602) is supplied to a phase modulating input of a next waveform generator (603), wherein a proportion of the output from the last waveform generator in a chain (603) of serially connected waveform generators is supplied to a phase modulating input of the first waveform generator (602) in said chain, thereby providing a degree of recursion. Outputs from a plurality of waveform generators are supplied to a ring modulator (604) for generating harmonic sums and differences of frequencies produced by said recursion. A variable precision waveform lookup table (803) may be used to select a particular harmonic characteristic of tone and a frequency doubler (1001) may be included in the feedback loop to enable tones containing predominantly odd harmonics to be generated.

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 musical tone generating apparatus employs an array of microresonant structures to generate the harmonic component signals of a musical tone to be generated. The microresonant structures produce high frequency signals which are down converted to audio frequency range by mixing them with a high frequency reference signal. The desired tone color is achieved by modifying the relative amplitudes of the harmonic component signals to produce a desired tone color. A large number of microresonators are preferably integrated on a single integrated circuit substrate to provide a variable tone generating system in a relatively compact environment.

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: Synthesizer models for emulating musical instruments can be improved using an analysis model that compares the output signal of the model to a recording of a desired sound and derives a residual signal that can be used to correct the model. When the original model is a good one, the residual signal is small and takes much less memory to store than is required for a sampled sound.

Abstract: A technique for producing a sound of a plurality of a selected instrument from a digitized audio sample of the selected instrument. The digitized audio sample of the single selected instrument is stored in a memory. Next, copies of the digitized audio sample are micromanipulated in parallel in a plurality of digital processors corresponding in number to the plurality of the selected instrument. Each of the digital processors processes the digital audio sample in a slightly different time variant manner to produce the effect of a plurality of instruments. The processed digital audio samples are summed into a single digital sample. The summed digital audio sample is converted to an analog signal which is sent to a speaker to produce the sound of the plurality of the selected instrument.

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 musical tone synthesizing apparatus generates musical tones of acoustic musical instrument which has operator like a hammer, and a vibrating element such as a string or a vibrating plate. The apparatus has a loop circuit which comprises at least two delays of which total delay time of the two delays corresponds to pitch of a musical tone, a propagating circle for simulating the vibrating element, an exciting signal generator which generates signal in accordance with a non-linear relation between the operator and the vibrating element, and a delay controller which controls a ratio of the delay time between the two delays. By varying the ratio, the apparatus realizes the characteristics of the vibration in the vibrating elements of which struck positions by the operator change in accordance with pitch of tones to thereby generates musical tones with fidelity.

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 waveform synthesizing apparatus provides a waveform memory containing m memory groups each further including n memories, so that the waveform memory contains m.times.n memories each storing at least one pair of musical tone data corresponding to a musical waveform. In addition, a musical parameter is converted into selection data in accordance with the predetermined conversion characteristic. At first, desirable one of the memory groups is selected. Then, two memories are selected from the selected memory group in accordance with the selection data. Thereafter, two pairs of musical tone data are mixed together by a ratio corresponding to the selection data. Thus, a synthesized musical waveform can be obtained from the mixed musical tone data. Preferably, the musical parameter is a key code, key-striking intensity applied to each key of a keyboard provided in an electronic musical instrument and the like.

Abstract: A karaoke circuit for an optical player including a mixing circuit for mixing signals reproduced from the optical disk to supply them to a speaker, a selector for selecting a digital channel signal recorded on the optical disk, an analog channel signal recorded on the optical disk or a vocal signal of either the analog left channel or the analog right channel according to a user's selection and supplying the selected signal to the mixing circuit, and a path controller for controlling the path of the selector according to a user's mode selection and according to a disk type, thereby simplifying the circuitry and mixing stereo accompaniment and a vocal signal during playback of a hi-fi multivoice disk to improve the sound quality of karaoke.

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.