Abstract: A method of and system for generating audio having pitch attributes of an incoming audio stream. The method comprises receiving a digital audio input. The audio spectrum is analyzed and integrated over segments of digital audio data upon receiving analysis triggers which can be synced with the audio tempo. The integrated spectrum is processed to find peak frequencies in the spectrum and their associated gain stored in a peaks array. The peak frequencies are used to program the oscillators controllable attributes and characteristics. The synthesis is performed upon receiving an analysis clock. A number of digital oscillators are configured with the associated frequency parameters and gain parameters from a peaks array. The oscillators are configured according to the audio pitch analysis and generate an oscillator output at the frequency and gain specified in the peaks array. These oscillator outputs are summed together generating synthesized audio.

Abstract: A reference part determiner determines a reference part from a plurality of parts including at least three parts. A subject part group determiner determines a subject part group from the plurality of parts, excluding the reference part determined by the reference part determiner out of the plurality of parts as a subject part group. An acquirer acquires a change pattern of a first audio parameter value set for the reference part. A changer changes a second audio parameter value set for the subject part group determined by the subject part group determiner according to a change pattern acquired by the acquirer.

Abstract: A manual vibrato control device, system and processing arrangement are disclosed. A manual vibrato includes a rotatable shaft, a raised cam section on the shaft, first and second biased collars received on the shaft either side of the cam section, the bias of the first collar being rotationally opposite to the bias of the second collar such that as the shaft rotates in one direction, it receives a return force from the first collar but does not rotate the second collar, and vice versa. Also disclosed are processing techniques to take the rotational data from rotational sensors, preferably Hall Effect, on the shaft and generate pitch change instructions for a pitch modification device. The mapping is user controllable to produce desired effects and performance.

Abstract: The present invention provides a piano-type key actuator that employs supplemental actuation so as to enable an associated key to become engaged when a typical actuation force is applied anywhere along its entire length, including from within the immediate vicinity of its pivot point, where the key would otherwise be unusable for playing due to the prohibitively large actuation force that would generally be required in this area. By eliminating the unusable portion of a key, a full-function keyboard can be provided in a more compact and portable form.

Abstract: A method and system for teaching oneself to learn to play a string instrument and master it by analyzing one's real-time hand/finger movement/technique/form, enabling oneself to progress and correct one's own mistakes simultaneously. In one aspect, a system for learning to play a string instrument is provided that includes a simulation instrument that includes a plurality of strings, wherein at least one of the strings includes at least one-touch sensing sensor thereon in communication with at least one processor to receive a signal from the at least one touch-sensing sensor and determine therefrom when and where on the at least one string a user applies pressure to the at least one string.

Abstract: Music data memory includes pieces of music within a group and other pieces of music outside the group. The next piece to be played is automatically determined by random table among pieces within the group. Favorite or newest piece is weighted to be more frequently played in the group. Piece in music data memory is automatically included into the group by random table. Newly downloaded piece into music data memory is included into the group by priority. Most frequently played piece is excluded from the group in place of newly included piece. Favorite or newest piece may be an exception of exclusion. Next piece is capable of being played in tempo similar to that of preceding piece by means of tempo-adjusted or piece replacement or repetition of the same piece for the purpose of continued baby cradling in synchronism with the same tempo of succeeding pieces.

Abstract: In a coefficient measurement apparatus, a line input terminal receives a pickup signal that is generated based on a string vibration of a musical instrument. A microphone input terminal receives a microphone signal acquired by a microphone that collects sounds of the musical instrument. An adaptive filter estimates a transfer function associated to resonance of the musical instrument and a transfer function of an acoustic space formed from the musical instrument to the microphone, generates an output signal by processing the pickup signal using the estimated transfer function, and updates the transfer function using a difference between the output signal and the microphone signal as a reference signal.

Abstract: Methods, systems, and media for performing visualized quantitative vibrato analysis are provided. In some embodiments, a method for analyzing musical vibrato in an audio file is provided, the method comprising: receiving, using a hardware processor, a target note from a user; receiving, using the hardware processor, a time-domain signal representing a piece of music comprising a plurality of notes, wherein the plurality of notes include the target note and the target note is played with a vibrato effect; converting, using the hardware processor, the time-domain signal to a frequency-domain signal; determining, using the hardware processor, a plurality of changes in frequency and intensity of the vibrato effect over time based on the frequency-domain signal; determining, using the hardware processor, a target frequency corresponding to the target note; and displaying, on a display, data about the changes in frequency and intensity of the vibrato effect over time and data about the target frequency.

Abstract: Provided are a method, computer storage device, and tone control device for generating tones with a vibrato effect. A determination is made of a key depression interval comprising a difference of a current time of a current note from a previous time of a previous note. A performance mode is set to a single tone mode, in which only one note is generated, or a polyphonic mode, in which multiple notes are simultaneously generated, based on the determined key depression interval. The tone is generated to output the current note with a first modulation magnitude in response to determining that the performance mode is the single tone mode. A tone is generated to output the current note with a second modulation magnitude in response to determining that the performance mode is the polyphonic mode, wherein the first modulation magnitude is greater than the second modulation magnitude.

Abstract: A musical keyboard touch sensor pad having a plurality of integrated sensors disposed in an array is disclosed. The plurality of integrated sensors represents a keyboard key. A processor is electronically coupled to the plurality of integrated sensors. The processor is programmed to receive signals from several of the plurality of integrated sensors and to generate a sound signal based on input from the several of the plurality of integrated sensors. The output is variable based on the number in the plurality and the location of the plurality in the array. An audio output device is electronically coupled to the processor to generate a sound based on the sound signal. A keyboard using a plurality of the sensor pads as well as a method of generating sounds from the keyboard are also disclosed.

Abstract: Phase setting section sets virtual phases in a frequency series of an audio signal. Unit wave extraction section extracts, from the frequency series, a unit wave of one cyclic period defined by the set virtual phases, for each of a plurality of time points. First generation section generates velocity information corresponding to a degree of compression/expansion, to a predetermined length, of the unit wave. Second generation section generates shape information indicative of a shape of a frequency spectrum of the unit wave having been adjusted. Variation component impartment section generates a variation component by use of the velocity information and shape information generated for the individual time points.

Abstract: An advanced MIDI/audio processing system with virtual key-switches. The virtual key-switches are mapped to different musical concepts. As a user presses a key-switch in real time with the playing of musical notes, the musical concept mapped to the key-switch that was pressed is applied. The instrument then switches to a new playing state based on the particular musical concept that was applied. Furthermore, the system is configured to provide a smooth transition between dynamic levels when applying crescendo or diminuendo effects via a modulation wheel. The system also configured to provide enhanced cycling of alternate samples by providing an individual alternate cycle for each note of each articulation in each dynamic level. Furthermore, the system is configured to allow a user to store and recall specific cycle positions, and override an existing cycle to choose a specific alternate sample for a specific note.

Abstract: An apparatus for processing an encoded signal and method thereof are disclosed, by which an audio signal can be compressed and reconstructed in higher efficiency. An audio signal processing method includes the steps of identifying whether a type of an audio signal is a music using first type information, if the type of the audio signal is not the music signal, identifying whether the type of the audio signal is a speech signal or a mixed signal using second type information, and if the type of the audio signal is determined as either the speech signal or the mixed signal, reconstructing the audio signal according to a coding scheme applied per frame using coding identification information. If the type of the audio signal is the music signal, the first type information is received only. If the type of the audio signal is the speech signal or the mixed signal, both of the first type information and the second type information are received.

Abstract: Various embodiments of the present invention are directed to providing a musical tone control device for carrying out appropriate control in user-performed operations. A pitch parameter value PB set by a pitch bend wheel may be loaded and a determination may be made whether the pitch parameter value PB is within a specified range. If the pitch parameter value PB is within the specified range, a time t may advance by 1, and a determination may be made whether the time t has reached t1. If the time t has reached t1, an amplitude value from a low frequency oscillator (LFO) table corresponding to the time t may be read out from the LFO table. The vibrato value VI may be calculated by multiplying the amplitude value and the vibrato depth. The pitch parameter value PB and the vibrato value VI may be added and transmitted to the sound source.

Abstract: An improved 3-dimensional musical keyboard apparatus comprises a plurality of planar, longitudinally extending keys mounted for both downward depression and longitudinal displacement; spring components to return an unguided key to its at-rest position; means to limit the extent of key motion; sensing means to detect key position at any point in its range of motion; and electronic digital signal processor means responsive to key position signals and productive of musical control information. Additionally, it comprises a single line of contact structure for restraining keys from lateral motion; differential damping for the vertical and horizontal components of key motion; simplified means for signaling key center position in the displacement axis; and support for musical articulation in the direction of key displacement when a key is moving upward from a depressed position.

Abstract: In a coefficient measurement apparatus, a line input terminal receives a pickup signal that is generated based on a string vibration of a musical instrument. A microphone input terminal receives a microphone signal acquired by a microphone that collects sounds of the musical instrument. An adaptive filter estimates a transfer function associated to resonance of the musical instrument and a transfer function of an acoustic space formed from the musical instrument to the microphone, generates an output signal by processing the pickup signal using the estimated transfer function, and updates the transfer function using a difference between the output signal and the microphone signal as a reference signal.

Abstract: Performance event data designating rendition style modules are supplied in order of time. When a given performance event data at a given time is to be processed in accordance with the supplied performance event data, another performance event data related to one or more events, following the given performance event data, is obtained in advance of a predetermined original time position of the other performance event daata. Control data corresponding to a rendition style module designated by at least one of the given performance event data and the other performance event data obtained in advance is generated on the basis of the given and the other performance event data, and a waveform corresponding to the designated rendition style module is synthesized on the basis of the control data.

Abstract: There are provided a singing voice-synthesizing method and apparatus capable of performing synthesis of natural singing voices close to human singing voices based on performance data being input in real time. Performance data is inputted for each phonetic unit constituting a lyric, to supply phonetic unit information, singing-starting time point information, singing length information, etc. Each performance data is inputted in timing earlier than the actual singing-starting time point, and a phonetic unit transition time length is generated. By using the phonetic unit transition time, the singing-starting time point information, and the singing length information, the singing-starting time points and singing duration times of the first and second phonemes are determined. In the singing voice synthesis, for each phoneme, a singing voice is generated at the determined singing-starting time point and continues to be generated for the determined singing duration time.

Abstract: Sound signal is received which contains sound characteristics to be represented in musical notation. The characteristics, such as a volume level of the sound signal, are extracted out of the received sound signal, and various parameters for use in subsequent analysis of the sound signal are set in accordance with the extracted characteristics. Also, a desired scale determining condition is set by a user. Pitch of the sound signal is determined using the thus-set parameters. The determined pitch is rounded to any one of scale notes, corresponding to the user-set scale determining condition. Also, a given unit note length is set as a predetermined criterion or reference for determining a note length, and a length of the scale note determined from the received sound signal is determined using the thus-set unit note length as a minimum determination unit, i.e., with an accuracy of the unit note length.

Abstract: Each time a predetermined type of note controlling performance data (e.g., note-on event data) is detected from among a series of performance data, deviation values for a plurality of channels, varying in deviation state among the channels, are set such that a control value of a predetermined tone characteristic (e.g., event generation timing), included in the note controlling performance data, is caused to vary among the plurality of channels. Then, values, obtained by causing the control value vary among the plurality of channels in accordance with the respective deviation values of the channels, are set as new control values for the corresponding channels. Then, for each of the channels, there is created note controlling performance data of the predetermined type having the corresponding new control value incorporated therein. A break of a phrase in performance data may be detected so that control can be performed per phrase.

Abstract: A reflection sound generator has a first filter of Finite Impulse Response (FIR) type that is provided with a first set of parameters representing a first distribution pattern of reflection sounds, and a second FIR-type filter provided with a second set of parameters representing a second distribution pattern of additional reflection sounds. The first distribution pattern has a time length sufficient to cover an initial reflection sound and subsequent reverberant reflection sounds which are distributed at intervals along the time. The first filter executes convolution operation of sample data of an input sound by the first set of parameters to generate first data containing a sequence of reflection sounds of the input sound. The second filter executes convolution operation of the first data by the second set of parameters to generate second data containing additional reflection sounds which fill the intervals of the reflection sounds of the input sound.

Abstract: A method for influencing, e.g., for decreasing, the treble reproduction of an audio signal for reproduction obtained from a received signal, the received field strength and reception quality of the received signal being evaluated and, as a function thereof, the transfer function of at least one filter unit that can be impinged upon by the audio signal being controlled, as well as a circuit assemblage or arrangement for performing such a method for the modification of treble reproduction, so that, among other things, reproduction of the interference may always be reliably concealed and so that no noticeable and/or irritating “flutter” effects may occur. The method may include processing of the output signals of at least two reception interference detectors, and processing of the received field strength may be accomplished respectively in at least one first processing branch operating at a first, e.g.

Abstract: When adjoining, i.e. Preceding and succeeding, waveform-forming module data are to be interlined, a mutual approaching rate is designated, and the preceding and succeeding module data are modified in accordance with the designated mutual approaching rate. The modification based on the mutual approaching rate allows the preceding and succeeding module data to approach each other and thus provides for smooth link or connection between the two module data. Further, by designating a link starting point in the preceding module data and/or a link ending point in the succeeding module data, the preceding and succeeding module data are interlined to an appropriate degree depending on a difference or degree of similarity between the two module data.

Abstract: A method and apparatus for generating a simulated reverberation characteristic in an input audio signal having a plurality of channels, each channel transmitting time-synchronized data elements. The method and apparatus imparts a unique delay to each element of a set of time-synchronized data elements and thereafter delays the data element set through a series of delay elements. Each of a plurality of early reflection taps reads in and outputs a unique linear combination of the delayed data elements. The delayed elements are selectively input to at least one summing filter incorporating a plurality of comb filters. The output of the at least one summing filter is selectively combined based upon a summing scheme to provide a plurality of sum output elements. The sum output elements are combined with the early reflection tap output and a preselected combination of the time-synchronized data elements of the input signal to create a simulated reverberation signal.

Abstract: An electronic keyboard instrument is basically configured by a keyboard, a microcomputer, a tone generator and a sound system as well as sensors, switches and foot switches. Each of keys of the keyboard is equipped with a variety of sensors and switches such as a touch sensor, make switches, a key-stroke sensor, key-depression pressure sensors and a hammer-depression pressure sensor, while the foot switches correspond to a damper pedal, a soft pedal and a sostenuto pedal as well as a slur foot switch and a portamento foot switch. Herein, various acoustic instruments are related to different performance techniques respectively. So, operating a foot switch designate a specific performance technique detection rule in response to a desired tone color corresponding to an acoustic instrument whose sounds are being simulated. Then, a performance technique is detected in accordance with the performance technique detection rule on the basis of outputs of the sensors, at least one of which is selectively used.

Abstract: Set of sample identification information and representative-point designating data is generated in accordance with performance data or the like, and sample data is obtained by referring to a database in accordance with the generated sample identification information. If necessary, the thus-obtained sample data is adjusted or modified on the basis of the representative-point designating data. Characteristic of the sample data can be controlled appropriately and efficiently by the representative-point designating data specifying representative sample points for which sample data adjustment is to be performed. For example, particular sample data that is located at a given representative sample point designated by the representative-point designating data is adjusted in accordance with adjustment information, and other sample data that is located at another sample point is adjusted simultaneously with such adjustment at the representative sample point.

Abstract: A waveform producing method includes a step of producing a waveform presenting style-of-rendition characteristics corresponding to style-of-rendition identification information, on the basis of individual vector data arranged on the time axis. Each style-of-rendition identification information is representative of style-of-rendition characteristics of a performance tone and indicates one of a plurality of styles of rendition to which the style-of-rendition characteristics correspond. A plurality of vector data are generated, in accordance with the received style-of-rendition identification information, for production of a waveform presenting the style-of-rendition characteristics. The vector data correspond to a plurality of different fundamental waveform factors for constituting a waveform. By arranging the individual vector data on the time axis, a waveform shape or envelope corresponding to the waveform factors can be built along a reproducing time axis of the performance tone.

Abstract: A pitch of a tone to be generated is designated, and simultaneously control information to be used for time-axis stretch/compression control is generated. Discrete locations of waveform data to be read out from memory are designated with the time axis of the waveform data controlled to be stretched or compressed in accordance with the control information, and part of the waveform data at the designated locations are read out at a rate corresponding to the designated pitch. For example, virtual read addresses corresponding to the control information and actual read addresses corresponding to the designated pitch are generated, and the actual read addresses are controlled, at the individual discrete locations, to follow the virtual addresses.

Abstract: A succession of performance sounds is sampled, and the sampled performance sounds are divided into a plurality of time sections of variable lengths in accordance with respective characteristics of performance expression therein, to extract waveform data of each of the time sections as an articulation element. The waveform data of each of the extracted articulation elements are analyzed in terms of a plurality of predetermined tonal factors to thereby create template data of the individual tonal factors, and the thus-created template data are stored in a data base. Tone performance to be executed is designated by a time-serial sequence of a plurality of articulation elements, in response to which the respective waveform data of the individual articulation elements are read out from the data base to thereby synthesize a tone on the basis of the waveform data. Thus, it is possible to freely execute editing, such as replacement, modification or deletion, of the element corresponding to any desired time section.

Abstract: A digital wavetable audio synthesizer is described. The synthesizer can generate up to 32 high-quality audio digital signals or voices, including delay-based effects, at either a 44.1 KHz sample rate or at sample rates compatible with a prior art wavetable synthesizer. The synthesizer includes an address generator which has several modes of addressing wavetable data. The address generator's addressing rate controls the pitch of the synthesizer's output signal. The synthesizer performs a 10-bit interpolation, using the wavetable data addressed by the address generator, to interpolate additional data samples. When the address generator loops through a block of data, the signal path interpolates between the data at the end and start addresses of the block of data to prevent discontinuities in the generated signal. A synthesizer volume generator, which has several modes of controlling the volume, adds envelope, right offset, left offset, and effects volume to the data.

Abstract: An electric guitar amplifier which utilizes a digital signal processor to produce vacuum-tube-like distortion without certain unwanted audio artifacts created by previous digital realizations of nonlinear, high-gain functions. By virtue of a microprocessor-controlled digital signal processor embodiment, the invention gives the user programmable control over parameters normally associated with state of the art guitar amplifiers (e.g. tone controls, reverb controls, tremolo controls, etc.), as well as other musically useful parameters which are not normally included among the controls of a guitar amplifier (e.g. selection of preamp type, autovolume, reverberation type, autowah, etc.).

Abstract: A digital sound generator with tremolo and vibrato sound effects is provided, which comprises: a source memory for storing different types of wave-tables; a first adder for adding a constant frequency and a step-varied frequency waveform to produce a tremulous frequency waveform; a register for storing a frequency address parameter from a central processing unit; an address generator for generating a frequency address in response to the frequency address parameter to said source memory to determine the type of signal waveform being outputted, so that said source memory produces a tremolo by playing the tremulous frequency waveform in the determined signal waveform; an amplitude generator for generating the amplitude of a normal sound; a second adder for adding the amplitude from the amplitude generator and an amplitude-variant signal from the source memory to produce a vibrato; and a synthesizer for synthesizing the tremolo and the vibrato to produce a sound with a special sound effect.

Abstract: A tone signal generator including a memory for storing tone signal data, a parameter generation device for generating parameter data, and a tone signal data generation device for generating the tone signal data by reading it from the memory, according to the parameter data. The generator includes also a level monitor device for monitoring a level of the tone signal data, and access control device to the memory. The access control device inhibits an access of the tone signal generation device to the memory when the level monitor device detects that the level of the tone signal data monitored is less than a specified value.Because the access control device inhibits the access of the tone signal generation device when the level of the tone signal data reaches the specified value, any other devices, such as a cpu, can access to the memory device in place of the tone signal generation device.

Abstract: A sound synthesis system employs a variable-length delay line whose length is modulated at a frequency that is close to the fundamental frequency of the delay line. By modulating the length of the delay line at a frequency close to the fundamental frequency of the delay line, a new class of sounds is generated. A delay line length modulator produces a periodic modulation signal whose frequency is close to the fundamental frequency of the delay line. The length of the delay line is modulated in accordance with the modulation signal, thereby causing a variable pitch shifting effect in the waveform produced by the delay line structure. Since the length of the delay line is modulated at a frequency close to the average loop frequency, part of the waveform stored by the delay line is time-compressed and the other part is expanded. The waveform's shape changes smoothly so that the compressed part of the waveform is pitched-shifted upwards, and the expanded part is pitch-lowered.

Abstract: A digital wavetable audio synthesizer with an LFO generator is described. The synthesizer can generate up to 32 high-quality audio digital signals or voices, including delay-based effects. The synthesizer includes an address generator which has several modes of addressing wavetable data. The address generator's addressing rate controls the pitch of the synthesizer's output signal. A synthesizer volume generator, which has several modes of controlling the volume, adds envelope, right offset, left offset, and effects volume to the data. The synthesizer LFO generator can add LFO variation to: (i) the wavetable data addressing rate, for creating a vibrato effect; and (ii) a voice's volume, for creating a tremolo effect. The LFO generator assigns two triangular-wave LFOs to each of the 32 possible voices. One LFO is dedicated to vibrato (frequency modulation) effects and the other to tremolo (amplitude modulation) effects. It is possible to ramp the depth of each LFO into and out of a programmable maximum.

Abstract: Music information and word information are input to a music/word information input unit. A voice part extracting unit extracts note length information, pitch information, loudness information, and phonetic symbols from the music information and the word information for each voice part. A note length information changing unit changes the note length information extracted for each voice part. A pitch information changing unit changes the pitch information extracted for each voice part. Furthermore, a loudness information changing unit detects a solo in a chorus and changes the loudness information of the solo. A singing voice signal synthesizing unit provided for each voice part synthesizes a singing voice signal according to the note length information extracted and changed for each voice part, the pitch information extracted and changed for each voice part, the changed loudness information, and the phonetic symbols.

Abstract: A delay-time-modulation effecting apparatus employed by an electronic musical instrument or the like, is designed to effect a certain delay-time modulation on a musical tone signal so as to realize a desired modulation effect appear on a musical tone to be produced. The delay-time modulation is effected in response to a time lag between a write time and a read time at which the musical tone signal is written into and is read from a storage device (e.g., random-access memory). When a read address advances fast to be ahead of the write address, an overmodulation state emerges so that discontinuity in level of the musical tone signals occurs, which will result in an occurrence of noises. In order to avoid such an event, the read address should be limited not to advance ahead of the write address.

Abstract: An electronic sound generating device is proposed which can generate sound that is complex, profound and high in fidelity to acoustic sound. Sound of the acoustic instruments consists of a plurality of harmonics. Some of the harmonics have swings on their envelope curves, thereby causing beats of the sound. Inspired by this feature, the present invention causes swing on predetermined harmonics in synthesizing a plurality of harmonics for generating sound. A construction for swinging the envelope curves is also proposed.

Abstract: A music re-performance system allows a plurality of untrained instrumentalist to play pre-stored music using traditional playing techniques along with an automatic accompaniment at a tempo controlled by a selected-instrumentalist. Instrumentalist's gestures start and stop pre-stored score notes and temporal restrictions limit gestural timing errors. Expression parameters, including volume, timbre, and vibrato, are selectively updated, allowing editing of music sound files. A finger manipulation and energy driver controller model, including transducers and signal processing, accommodates wind and string instruments. Temporal masking prevents substantially concurrent finger and energy gestures, intended as simultaneous, from producing multiple false gestures.

Abstract: A device for reading sound waveform data has a waveform ROM for storing waveform data represented as an amplitude in a time series. Sound waveform data is repeatedly read from the waveform ROM. The reading of a single waveform corresponds to a single period. A scale ROM stores a plurality of frequency dividing ratios. A programmable counter divides a signal having a predetermined frequency in correspondence with a frequency dividing ratio output by the scale ROM and outputing a clock pulse. A counter counts the clock pulses and indicates the addresses of the waveform ROM. The scale ROM changes the frequency dividing ratio data during an arbitrary divided period of intervals in the period for reading the waveform data. During the period for reading the waveform by the counters, the sound waveform read out has a single frequency and accordingly a single period. The waveform reading period is divided into m number of intervals.

Abstract: An electronic musical instrument according to the present invention has oscillators for generating a tone waveform; a modulator for modulating a musical tone; a modulation controller for determining a degree of modulation to be performed by the modulator; and a central control unit for controlling the oscillators, the modulator and the modulation controller. A memory stores a current control value of the modulation controller, and an input/output device reads a control value stored in the memory, by the central controller, and/or writes a control value stored in the memory into the central controller to ensure the control of the degree of modulation and the alteration of frequency bands.

Abstract: Tone waveform data is divided into plural data segments, so that frequency and magnitude of respective spectra contained therein are analyzed for each of the data segments. Analyzation parameters indicative of the frequency and magnitude of the respective spectra for each said data segment which has been obtained through the analyzation is stored into a memory. The analyzation parameter for each data segment is sequentially read out from the memory, and the tone waveform data is reanalyzed on the basis of the read-out parameter. To control the frequency of a resulting tone, a data shift circuit may be provided which serves to shift the value of the frequency data contained in the analyzation parameters.

Abstract: An automatic performance apparatus stores performance technique designating data and an automatic performance data in a sequence memory, and performance technique data which varies in a lapse of time in a performance data memory to reduce the amount of sequence memory. When the performance technique designating data is detected during the performance, the performance technique data corresponding to the detected performance technique designating data is read out. The performance technique data controls musical tones specified by the automatic performance data. Thus, various performance technique can be realized with a small amount of sequence data.

Abstract: A plurality of groups of tone parameters different in kind required for the generation of a musical sound is stored. The tone parameters of the same kind among those tone parameters are modulated with the same sway signal generated at the same time at a desired time or at fixed intervals of time when a key concerned is depressed. The modulated parameters are either restored in the original storage region or directly delivered to a sound source. The resulting musical sound has an acoustically natural comfortable tone quality. Even if musical sounds are generated simultaneously, no sways in the respective tones of the musical sound are canceled.

Abstract: The electronic musical instrument, which is suitable for generating sustaining tone of a rubbed string instrument, has a manipulator for achieving performance manipulation in a linear manipulation region or in a plane manipulation region to simulate the motion of a bow of the rubbed string instrument, and a processing circuit for applying smoothing treatment to signals given by the manipulator. The musical tone generated by the electronic musical instrument can be prevented from being contaminated with discordant sound caused by noise produced in performance manipulation.

Abstract: A tone generator comprises a basic wave memory for storing a first basic wave data of a musical tone signal, a differential wave memory for storing differential wave data between the first basic wave data and a second basic wave data which is different form the first basic wave data, and mixing device for mixing the first basic wave data and the differential wave data. The musical tone signal is produced by using the mixing device which mixes the basic wave data and the differential wave data without using directly stored sampling data memory. Further a multiplier for multiplying said differential wave data by random factors is provided, the random factors being distributed with normalized probability, resulting in that wave data not only varying tone color at random, but also resembling as a whole the basic wave tone color can be obtained.

Abstract: An electronic musical instrument has a low frequency oscillator (LFO) for generating a low-frequency signal to impart musical effect such as vibrato to musical tones, and a plurality of tone generating channels. The LFO comprises a random access memory (RAM), a feedback loop, and a waveform generator. The LFO generates the low-frequency signal in accordance with the designated RAM addresses corresponding to the designated tone color to impart a same phase musical effect to the plurality of channels having same tone color.

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 modulation effect adding apparatus in which when an input signal is written into a memory and read and output with a given delay time, the delay time is changed depending on an LFO waveform to thereby add a modulation effect to the input signal. The LFO waveform is obtained by passing through a low pass filter a waveform signal comprising multiple high harmonic components and changing in a positive- or negative-going direction at a particular period. By changing the characteristic of the low pass filter, various LFO waveforms are obtained. An offset value corresponding to the maximum peak value of the LFO waveform is added to the LFO waveform, and the resulting waveform is multiplied by an offset value having a predetermined magnification and inverting the waveform signal to thereby prevent a memory read address from disadvantageously exceeding a write address.

Abstract: A computer having one or more wave tables stored therein is used to synthesize sounds represented by a series of digital samples produced at a sample rate by specifying parameters including a carrier frequency, a modulating frequency and an index of modulation. At each sample time, a modulation value determined during an immediately preceding sample time is scaled to produce a digital control signal. Also at each sample time the modulation value to be used during an immediately succeeding sample time is read from a location of a wave table determined by the modulating frequency, and a carrier value used to produce the digital samples is read from a location of a wave table determined by the carrier frequency and the digital control signal. Modulation effects are therefore delayed by one sample in order to speed execution of the method using the computer.