Abstract: A musical tone signal generating apparatus having a plurality of voice units connected to a common data bus to which a master central processing unit or master CPU, a program read-only memory or program ROM and a random access memory or RAM are connected, wherein a control program and a control data for synthesis of plural element musical tone signals are applied to the voice units from the common data bus through a bus controller under control of the master CPU, wherein the voice units each include a slave central processing unit or slave CPU, a slave random access memory or slave RAM, a digital signal processor or DSP and a random access memory or RAM for the DSP for executing the control program for synthesis of the element musical tone signals defined by the control data.

Abstract: An audio signal processing system including an input circuit for inputting musical instrument digital interface (MIDI) commands in real time over a plurality of channels, a computer including a central processing unit (CPU) supplied with the MIDI commands for simultaneously synthesizing one or more voices for each of the channels in response to the MIDI commands, each of the voices being generated by one or more of a plurality of predefined audio synthesis algorithms executed in software, a random access memory (RAM) for storing digital voice data representative of each of the voices generated by the CPU, an output circuit for audibly reproducing the voices from the digital voice data stored in the RAM, and wherein the CPU, in generating the voices selects the one or more audio synthesis algorithms based on one or more of the following criteria: the external processing demands placed upon the CPU by other operations being performed by the personal computer, a best match, according to predetermined criteria, b

Abstract: A tone synthesis system employs a filtered delay loop which is excited by an excitation signal. The excitation signal corresponds to a partial impulse response of a body filter to the system which is to be simulated. Additional components of the impulse response of the body filter are imparted to an output from the filtered delay loop. High quality tone synthesis can be achieved without the necessity of providing a complicated body filter.

Abstract: A musical tone generating apparatus is provided for a keyboard electronic musical instrument. The apparatus consists of a musical tone source, a coefficient generator, a digital filter and so on. The coefficient generator generates at least one time dependence coefficient, and applies It to output of the digital filter. The parameter controller changes at least one parameter, which designates tone color of the musical tone, in accordance with the time dependent coefficient to thereby realize time-variant changing rate of envelope of musical tone. And, the coefficient generator and the parameter controller are used by means of time sharing technique. That is, the coefficient is used as plural units, wherein each unit generates a coefficient in each stage, and the digital filter is also used as plural units. Each digital filter unit changes a parameter of tone color of the musical tone in accordance with the coefficient supplied thereto.

Abstract: An electronic musical instrument has pedals, such as a damper pedal and a sostenuto pedal, and controls a read out musical tone in consonance with the position of a depressed pedal, thereby to provide the same effects as those provided by half pedal playing with an acoustic piano. The electronic musical instrument includes: a detector for detecting the position of a pedal; a memory for storing tone data that is selectable in consonance with the pedal position; a reading circuit for selecting and reading the tone data from the memory in consonance with the pedal position detected by the detector; and a tone generator for generating a musical tone by employing the tone data that are read by the reading circuit.

Abstract: An electronic musical instrument produces musical tones based on waveform data, while providing smooth changes between different timbres and at the same time avoiding reduction in the efficiency of waveform compression. The timbre change is carried out in an interpolation interval, the magnitude of which varies in accordance with the magnitude of the timbre change. The data necessary to establish the interpolation interval may be stored and read out of a memory or may be determined by interpolation according to a linear function.

Abstract: In a closed wave guide network having a bidirectional signal transmitting channel section and a signal junction section, signal delay time is variably controlled by a first parameter group so as to control the resonance frequency characteristics of the wave guide network. A signal excitor is connected to the wave guide network so that an excited signal is supplied to the network. The excitation frequency of the excitor is controlled in accordance with a second parameter group. There are also provided a combination determination section which, in correspondence to the pitch of a tone to be generated, determines a combination of the first parameter group to be used in the wave guide network and the second parameter group to be used in the excitor, and a parameter generator which, in accordance with the combination determined by the combination determination section, generates and supplies individual parameters of the first and second parameter groups.

Abstract: A sequencer for an electronic musical instrument and a method for controlling sequencing of the electronic musical instrument, wherein when a registration switch is depressed after a fast-forward or rewind switch is depressed, a controller controls a disk driver to perform a fast-forward or rewind operation to a position where the registration switch was depressed in a previous recording or playback operation, whereupon the fast-forward or rewind operation is automatically stopped. The controller then reads out stored tone control information which corresponds with the registration switch and outputs a tone in accordance with the tone control information. The sequencer and method of the present application permit the fast-forward or rewind switch to be activated and then released and does not require continual depression of these switches by an operator.

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 tone generator for an electronic musical instrument analyzes an original waveform signal to store results of analysis thereof into a memory. The results of the analysis read out from the memory is interpolated to generate results of the interpolation in synchronism with each sampling clock. The results of the analysis are corrected to cancel a frequency characteristic to be imparted to the results of the analysis when they are interpolated. The results of the analysis are stored into the memory after having been converted. In another form, a reading numerical value formed of an integer part and a decimal part is generated, in synchronism with a predetermined clock timing. The numerical value is variable at a rate proportional to the pitch of a musical tone to be produced. Residual waveform samples read from the memory based on the integer part are interpolated by the use of the decimal part in synchronism with a predetermined clock timing.

Abstract: An apparatus for synthesizing a musical tone comprises a loop circuit for circulating an input wave form signal through a delay circuit, a wave form memory, and a random modulation circuit for modulating the wave form signal stored in the wave form memory. The random modulation circuit generates a random signal, such as a noise signal. The random signal modulates address data to the wave form memory, so that the read wave form data read out from the wave form memory is delicately varied with time.

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: An electronic musical instrument has a voice-inputting function. Voice information and performance information are input to the instrument. The instrument stores performance data therein. Each item of performance data stored is sequentially read out. The next item of performance data is read out when it is determined that at least one of the voice information and performance information being given agrees with each item of performance data sequentially read out. The instrument includes a plurality of operating elements for performance. Display devices are provided for the operating elements, respectively. When voice input is detected, one of the display devices, corresponding to one of the plurality of operating elements, is lighted, which corresponds to the pitch name of the detected voice. When voice input ends, the light in the display device is turned off. The instrument sequentially stores the voice information being sequentially read out in another operating mode.

Abstract: A tone synthesis system employs a filtered delay loop which is excited by an excitation signal. The excitation signal corresponds to the impulse response of a body filter to the system which is to be simulated. High quality tone synthesis can be achieved without the necessity of providing a complicated body filter.

Abstract: An electronic musical instrument includes a pitch designation device for designating a pitch of a musical tone, and an operation device for setting an operation state of the electronic musical instrument and outputting operation data according to the operation state. When a pitch of a musical tone to be produced is designated, and operation data is outputted, musical tone parameters are read out from storage in accordance with the designated pitch and the operation data. The musical tone parameters include musical tone parameters directly corresponding to the designated pitch, and musical tone parameters for resonance tones. The musical tones are generated according to these readout musical tone parameters. The electronic musical instrument can obtain a resonance effect, a change in tone color, and the like, which are approximate to those of an acoustic instrument.

Abstract: An automatic performance apparatus comprises a performance data storage track for storing sequential performance data for controlling musical tones to be sequentially generated according to progress of a music piece, a plurality of element data storage tracks for storing sequential data consisting of at least one type of element data such as pitch data, timing data, and the like, constituting performance data, panel switches for designating the element data storage tracks or a type of data to be written in and/or read out from the element data storage tracks, and a CPU for sequentially reading out and synthesizing the element data from the element data storage tracks, and writing the synthesized data in the performance data storage track as new performance data.

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: An electronic musical instrument having a plurality of first operation elements arranged to be operated for designating a tone pitch of a musical tone to be produced, a plurality of second operation elements arranged to be operated for selecting a tone color of the musical tone, and a musical tone signal production circuit to be applied with a first data indicative of operation of the first operation elements and a second data indicative of operation of the second operation elements, wherein a timer-interrupt signal is generated at a predetermined time interval, a first task requirement flag for processing the first data is set in response to the timer-interrupt signal, and a second task requirement flag for processing the second data is set at each time when the first task requirement flag is plural times, and wherein the first data is applied to the musical tone signal production circuit in dependence upon the first task requirement flag, and the second data is applied to the musical tone signal production

Abstract: An electronic musical instrument of the present invention provides a tone generator which includes an exciter generating an excitation signal and a sound producer having an input apparatus which produces a musical tone signal in response to the excitation signal. The-tone generator delays the musical tone signal and feeds the musical tone signal back to the input apparatus. Furthermore, the electronic musical instrument provides a memory which stores a plurality of sound production algorithms and an assignment designating apparatus which designates one of the plurality of sound production algorithms and assigns the designated sound production algorithm to the musical tone generator. Moreover, the tone generator further includes the operation apparatus which performs the assigned sound production algorithm on the musical tone signal. In addition, the electronic musical instrument provides the extractor which extracts the musical tone signal.

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: An electronic musical instrument reads data of a musical tone from a waveform memory thereof according to pitch information input thereto, to form a tone signal containing a tone amplitude signal indicative of amplitude of the musical tone. The tone signal is passed into a plurality of signal paths to be formed into a plurality of analog tone signals. The plurality of signals paths each amplify the tone amplitude signal according to a note on/off velocity, and attenuate a plurality of modifications of the tone signal, depending on or not depending on the note on/off velocity and the pitch information on the musical tone, to generate a musical tone suitably reflecting the note on/off velocity and the pitch.

Abstract: A selector is provided for selecting a predetermined effect. Instruction as to whether this effect should be imparted or not is not made instantly in response to an output of this selector but made in association with instruction of start of tone generation by a key-on event signal. For example, even when a state in which an effect is selected is brought about in the course of generation of a tone without selecting an effect, this effect is not imparted to the tone which is currently being generated. Upon instruction of generation of another new tone in this state, instruction of imparting of the effect is made for the new tone so that the effect is imparted to the new tone from the start of generation of the tone. Conversely, when a state in which no effect is selected is brought about in the course of generation of a tone which is imparted with an effect, the effect is kept imparted to the tone which is currently being generated until generation of the tone is ended.

Abstract: A signal synthesizer uses a digital waveguide network having at least a two dimensional matrix of waveguide sections interconnected by junctions to filter one or more excitation signals so as to generate an array of synthesized output signals. The digital waveguide network has sets of waveguide sections interconnected by junctions. Each waveguide section includes two digital delay lines running parallel to each other for propagating signals in opposite directions and each junction has reflection and propagation coefficients assigned to it for controlling reflection and propagation of signals in the waveguide sections connected to that junction. Except for junctions along boundaries of the digital waveguide matrix, each junction is at least a four-way junction that interconnect at least four waveguide sections so as to scatter and intermix signals in flowing through those waveguide sections.

Abstract: A musical sound synthesizer simulates interaction of a hammer having a compressible striking surface with a resonating medium. A digital waveguide resonator that simulates operation of a resonating medium and generates digital resonator waveforms representing signals propagating in said digital waveguide resonator. A hammer filter simulates the hammer striking the resonating medium and generates first and second hammer waveforms. The hammer filter includes a scattering junction that couples the hammer filter to the digital waveguide resonator.

Abstract: A musical tone forming apparatus employed by an electronic musical instrument, comprises an external storage unit, a transfer DMA, a waveform RAM and a sound-source circuit. The external storage unit stores data representing a waveform of a musical tone, wherein the waveform comprises an attack portion and its remaining portion. The waveform RAM provides an attack-waveform storage area, exclusively used for storing attack-waveform data representing the attack portion, and a buffer storage area exclusively used for storing other waveform data representing the remaining portion. Before the production of the musical tone, the transfer DMA transfers the attack-waveform data to the waveform RAM, so that the attack-waveform data is stored in the attack-waveform storage area in advance.

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

Abstract: A musical tone synthesizing apparatus for generating a musical tone which is influenced not only by blowing pressure and embouchure, etc. but also effected by the movement of a performer's tongue. The apparatus comprises an operating part WC having a mouthpiece part and a reed part; a breath measuring sensor for measuring breath passing through the mouthpiece part; a tonguing detector for measuring the relative position of a performer's tongue to the reed part; a musical tone forming circuit TC for simulating the mouthpiece, the reed, and the resonance tube of the acoustic wind instrument in response to an output signal of the breath measuring sensor so as to create a musical tone signal; and a tonguing effector for changing a simulating characteristic of the reed of the acoustic wind instrument in response to an output signal of the tonguing detector.

Abstract: In a loop circuit having a low-pass filter, a delay circuit, and an all-pass filter, a wave signal read from a wave memory is supplied as an excitation signal to the loop circuit and circulated therein to synthesize a musical tone signal. A musical tone signal to be synthesized and processed by a signal processing system having a characteristic inverse to the loop circuit is stored in the wave memory.

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 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 controller is arranged as a sub control unit between a CPU as a main control unit and a tone generator system. The main control unit outputs command data having a standard format as an instruction signal. The sub control unit generates and outputs instruction data as an instruction signal in a format according to the type of tone generator system on the basis of the command data. The tone generator system executes generation of a tone signal and processing associated with generation of the tone signal in accordance with the instruction data. The CPU can efficiently control tone generator systems of different types. Data transfer between the CPU and a plurality of tone generator systems of different types can be highly efficiently performed, and the processing load on the CPU can be reduced.

Abstract: A tone generation system includes one or more digital waveguide networks coupled to one or more junctions, one of which receives a control signal for controlling tone generation. The control signal initiates and interacts with a wave signal propagating through the waveguide networks to form a tone signal. A non-linear junction may be employed which receives a signal from a waveguide, converts it in accordance with a non-linear function based upon the value of the control signal and provides it back to the waveguide. A tone signal whose pitch is determined by the wave transmission characteristics of the waveguide network is thereby produced.

Abstract: An automatic performance apparatus has a memory, a reading out circuit, a parameter creating circuit, and a tone generating circuit. Initially, basic performance data corresponding to the basic performance of a musical piece and musical expression data corresponding to musical expression to be imparted to the basic performance are stored in the memory according to the progress of the musical piece. Next, when the basic performance data and musical expression data are read out from the memory by the reading out circuit in due order, the parameter including musical expression is created based on the read out basic performance data and musical expression data in the parameter creating circuit. Accordingly, this parameter is supplied to the tone generating circuit and a musical tone signal to which musical expression is imparted is formed in the tone generating circuit.

Abstract: An auto-play apparatus having an auto-play data memory for storing a note data string of an auto-accompaniment pattern, and a tone generator for generating tones on the basis of the note data string read out from the auto-play data memory. The auto-play apparatus includes an intonation pattern memory for storing intonation patterns of a plurality of levels corresponding to different degrees of tone-up of a performance. The intonation value is changed upon operation of an operation unit, and a note data string is read out from the auto-play data memory on the basis of intonation pattern data corresponding to the new intonation value. The readout note data string is supplied to the tone generator. The intonation pattern data of different levels includes at least designation information for designating different read positions in the auto-play data memory, and different tone volume information, different tone color information, and different instrument information to be provided to the readout note data.

Abstract: A tone signal generating apparatus, including a memory for storing wave data containing frequency components within a full band; a tone generator for reading the wave data from the memory in accordance with key ON/OFF data to generate a tone signal; a velocity generator for generating a velocity value based on key ON/OFF data; a first coefficient processor for producing a first coefficient to control the amplitude in accordance with the velocity value generated by the velocity generator; a first operator for performing an operation on the first coefficient produced by the first coefficient processor and the tone signal generated by the tone generator, a filter for extracting frequency components within a specific band from the tone signal output from the first operator to produce a first tone signal and outputting the first tone signal; a second coefficient processor for producing a second coefficient to control the amplitude in accordance with the velocity value generated by the velocity generator; and a sec

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

Abstract: An electronic musical instrument has a data compatibility with respect to different models of the electronic musical instruments such as the beginner's model and pro model. In order to match the musical tone control data used in one model with the other musical tone control data used in another model, there is provided a conversion table which memorizes a relationship between them. By referring to this conversion table, certain musical tone control data made by one model is converted into the musical tone control data which can be used in another model. Thus, every model can generate musical tones by use of the musical tone control data which are converted suitably for itself. For example, the musical tone control data represents the tone color of the musical tone to be generated.

Abstract: An auto-play apparatus associated with a keyboard instrument is arranged for generating auto-accompaniment tones such as chord, bass drum lines to have a specific rhythm pattern. When a player determines tone-up of a music piece during a performance, he or she operates an intonation dial (22) arranged on an operation panel (2) or an expression pedal (23). Then, an intonation value representing a tone-up level of the music piece is generated as numerical value information. A corresponding play pattern is read out from an auto-accompaniment pattern ROM (6) according to the intonation value and a rhythm pattern selected in advance upon operation of an operation member of the operation panel (2), thus starting an auto-play operation. Auto-accompaniment pattern data corresponding to the intonation value is programmed to change the play pattern according to a tone-up state of a music piece during the performance of the music piece.

Abstract: Disclosed is an electronic musical instrument comprising keyboard operators for generating keyboard data; panel operators for generating tone control data; memory means for storing the tone control data; switch means for changing a normal mode to an interrupt mode, and vice versa; control means for, when tone control data is produced in accordance with an operation of the panel operators, writing the tone control data into the memory means in the normal mode, and inhibiting the tone control data from beings written into the memory means in the interrupt mode; a tone generator for, when keyboard data is produced in accordance with an operation of the keyboard operators, producing a tone signal based on the keyboard data and the tone control data stored in the memory means; and transmission means for generating transmission data according to tone control data when the tone control data is produced in accordance with an operation of the panel operators and transmitting the transmission data outside the electroni

Abstract: A tone color control apparatus for a musical tone signal producer has a first memory and a second memory. The first memory memorizes plural sets of tone color data for control of each tone color of plural different musical tone signals produced at the musical tone signal producer. The second memory memorizes plural sets of index data for indexing the plural sets of tone color data and also memorizes plural sets of modification data respectively corresponding with each set of index data. A desired set of the memorized index data and the corresponding set of the modification data are simultaneously read out from the second memory under control of tone color selection by a player. The tone color data are also read out from the first memory under control of the read out index data. The read out tone color data are modified based on the read out modification data to be applied to the musical tone signal producer for controlling a tone color of a musical tone signal produced therefrom.

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 electronic musical instrument for realizing an easy selection of registration from a variety of registrations. First, a number from "1" to "10" is selected in an upper keyboard timbre select switch group, the numbers corresponding to various timbres, such as piano, organ, harpsichord, guitar, or the like respectively. Similarly, another number from "1" to "10" is selected in a rhythm selecting switch group, the numbers corresponding varies to rhythms, such as jazz, pops, mood music, children's songs, classical, or the like. According to this, a preferable registration group with respect to the music can be easily selected from a great number (i.e., 10.times.10=100) of registration groups.

Abstract: An electronic sound generating apparatus which generates sound or recreates music performance according to the data included in a bar code. The apparatus includes a scanner to scan a bar code. Attributes of sound or music are assigned to parameters of control data for synthesizing sound or recreating music performance. Each of the parameters is given a specific value by the data included in a bar code scanned by the scanner. The resulted sound or music performance is provided with random, accidental, and unexpected characteristics, and an operator need not perform inputting operation to vary sound or music performance.

Abstract: In a tone signal synthesizer for synthesizing a tone signal by supplying a driving signal, into a closed loop circuit including a delay circuit and a filter, a filter coefficient which controls the characteristic of the filter is changed while a musical tone is generated. For example, a set of filter coefficients are provided at the time of key-on and are switched to another set of filter coefficients when a predetermined time is passed after the time of key-on. The set of filter coefficients are switched to a further set of filter coefficients at the time of key-off and then are switched to a still further set of filter coefficients when a predetermined time is passed after the time of key-off. It is possible to generate a musical tone which changes more complexly on the basis of the change of the filter characteristic, with the passage of time.

Abstract: Timbre control apparatus, for an electronic musical instrument that, in response to a tone-ON command, reads timbre data from storage memory where a plurality of timbre data to be employed have previously been stored, and produces musical tones in consonance with the timbre data. The timbre control apparatus has a first storage memory for storing first timbre data common to all tone ranges; a second storage memory for storing second timbre data inherent to specific tone ranges; a calculation circuit for, in response to a tone-ON command, performing a predetermined calculation employing the first timbre data read from the first storage memory and the second timbre data read from the second storage memory; and tone production circuit for producing a musical tone having a predetermined timbre in consonance with data calculated by the calculation circuit.

Abstract: An electronic musical instrument, including a tone generator for forming play tones and accompaniment tones according to tone source data read out from a waveform memory based on keyboard operations or auto-accompaniment data stored in a memory. The electronic musical instrument further includes a large number of operation switches on a panel for inputting tone parameters such as rhythm, tone color (type of instrument), tempo, and a display for displaying set tone parameters. Voice and character data representing the functions or specifications of the musical instrument, the operation guidelines of the operation switches, or the current setting state of the musical instrument, are stored in a memory. When a user performs a specific operation and requires assistance, voice data and character data are supplied to the tone generator and the display, and the user can visually and aurally recognize the functions or operation guidelines of the musical instrument.

Abstract: A desired rhythm instrument tone color can be assigned to a pad type performance operator. A desired type of repeated-tone mode, e.g., roll, flam or echo, can be selected by a switch operation or other suitable means. Upon operation of the performance operator, repeated tones having a rhythm instrument tone color assigned to the performance operator are generated with a stroke pattern having a characteristic peculiar to the tone color.

Abstract: An electronic musical instrument with an automatic performance function includes manual performance device, an automatic performance device and a control. The manual performance device, having a plurality of performance manipulators to be performed by a player, generates a manual performance musical tone having a tone color in response to the player's performing. The automatic performance device automatically generates automatic performance musical tones of a plurality of parts respectively corresponding to a plurality of tone colors. The control, in response to generation of the manual performance musical tone.

Abstract: An addition section and a memory section for storing data to be inputted to the addition section are provided. A processing section variably performs a logical processing on output data of the memory section in accordance with a control signal and gives the data to the addition section. A control section controls introduction of data to the memory section and supply of the control signal to the processing section in correspondence to respective desired operations so that plural kinds of operations for tone signal generation may be respectively performed. With this arrangement, the addition section can be shared for various kinds of operations for the tone signal generation. Consequently, operation circuits for performing the various operations are integrated, so as to realize a substantial reduction of circuitry construction.

Abstract: An architecture for a synthesizer of music or other sounds which comprises an input device which supplies real time input signals indicating selected voices, a voice program memory which stores voice programs for respective voices, and a sound processing module including an array of digital signal processors, which is coupled to the input device and the voice program memory, and responsive to real time input signals to execute a group of voice programs in the voice program memory to generate selective voices in real time. Resources coupled to the input device and the voice program memory dynamically assign voice programs for selected voices to the group of voice programs in response to the real time input signals. Further, resources are available for replacing a particular voice program in the group with a voice program for a selected voice in response to the real time input signals.