Abstract: In a music reproducing system, each of characters is allocated in advance a favorite rhythm component and a peculiar figure expressing ability. A sound pressure data producing section produces sound pressure data for each of a pluralty of frequency bands from musical data. A frequency band identifying section identifies the frequency band which beats a rhythm most. A rhythm estimating section derives a changing period of a sound pressure component in the sound pressure data at the identified frequency band and estimates a rhythm component based on the derived changing period. A character managing section cumulatively changes a figure expressing ability of a displayed character according to the matching degree between the estimated rhythm component and a favorite rhythm component of the displayed character. A display control section changes a display figure of the displayed character according to the figure expressing ability thereof while musical data is reproduced.

Abstract: There are provided an automatic composition apparatus and a method for automatically composing a piece of music, which enable a user to generate a large number of melodies having different atmospheres using a reduced number of melody generating templates, and a storage medium storing a program for executing the method. A plurality of piece-of-music-independent templates containing various information independent of pieces of music are supplied to generate melodies of the pieces of music. A plurality of piece-of-music-dependent templates containing various information dependent on the pieces of music are supplied to generate melodies of the pieces of music. A piece-of-music-independent template is selected from the supplied plurality of piece-of-music-independent templates. A piece-of-music-dependent template is selected from the supplied plurality of piece-of-music-dependent templates.

Abstract: On an initial screen, a conversion ratio indicated by a style conversion ratio data is displayed in a display area 32. Various kinds of styles are displayed in display areas 33 to 38. In this case, a style which is currently selected is "Samba" which blinks, and the conversion ratio is 50%. When a style number corresponding to samba is "2," a style change is conducted for the original performance data based on a style conversion data corresponding to the style number 2. At this time, the conversion ratio of 50% is referred, and changes of a sound-producing timing, a tone color, an additional instrument, and the like are conducted. An image displayed on a monitor is changed based on an image conversion data.

Abstract: An initial note series is collected from a real-time source of musical input material such as a keyboard or a sequencer playing back musical data, or extracted from musical data stored in memory. The initial note series may be altered to create variations of the initial note series using various mathematical operations. The resulting altered note series, or other data stored in memory is read out according to one or more patterns. The patterns may have steps containing pools of independently selectable items from which random selections are made. A pseudo-random number generator is employed to perform the random selections during processing, where the random sequences thereby generated have the ability to be repeated at specific musical intervals. The resulting musical effect may additionally incorporate a repeated effect, or a repeated effect can be independently performed from input notes in the musical input material.

Abstract: An initial note series is collected from a real-time source of musical input material such as a keyboard or a sequencer playing back musical data, or extracted from musical data stored in memory. The initial note series may be altered to create variations of the initial note series using various mathematical operations. The resulting altered note series, or other data stored in memory is read out according to one or more patterns. The patterns may have steps containing pools of independently selectable items from which random selections are made. A pseudo-random number generator is employed to perform the random selections during processing, where the random sequences thereby generated have the ability to be repeated at specific musical intervals. The resulting musical effect may additionally incorporate a repeated effect, or a repeated effect can be independently performed from input notes in the musical input material.

Abstract: An initial note series is collected from a real-time source of musical input material such as a keyboard or a sequencer playing back musical data, or extracted from musical data stored in memory. The initial note series may be altered to create variations of the initial note series using various mathematical operations. The resulting altered note series, or other data stored in memory is read out according to one or more patterns. The patterns may have steps containing pools of independently selectable items from which random selections are made. A pseudo-random number generator is employed to perform the random selections during processing, where the random sequences thereby generated have the ability to be repeated at specific musical intervals. The resulting musical effect may additionally incorporate a repeated effect, or a repeated effect can be independently performed from input notes in the musical input material.

Abstract: In an automatic accompanying apparatus and an automatic accompanying method, the respective part structures of a plurality of basic variation patterns used as a basic accompanying pattern of rhythm are arbitrarily set by a music player. When the music player selects one basic variation pattern from a plurality of basic variation patterns to which the part structures are set in such a manner, the part structure is automatically set in such a manner that part structures of an intro-pattern, an ending pattern, and also a fill-in pattern, which are prepared for this rhythm, are made equal to the part structure of the selected basic variation pattern. The automatic accompaniment is carried out by employing the selected basic variation pattern, and the intro-pattern, ending pattern, and fill-in pattern, which own the same part structures as that of this basic variation pattern. As a result, the automatic accompaniment can be carried out while being matched with a motif of a user through the entire music.

Abstract: A system and method are disclosed for emulating a frequency modulation sound chip with minimal hardware and utilizing the excess capacity of current computer systems. In one embodiment, the frequency modulation emulation apparatus includes a frequency modulation emulator suitable to communicate with a computer system. The frequency modulation emulator provides an addressable memory space, substantially similar to an emulated addressable memory space of the emulated frequency modulation sound chip, such that a frequency modulation application implemented on the computer system can communicate with the frequency modulation emulator. The emulator chip receives audio data through the addressable memory space from the frequency modulation application and, the frequency modulation application is unaware that the frequency modulation emulator is receiving the audio data rather than the emulated frequency modulation sound chip. A frequency modulation generator is implemented on the computer system.

Abstract: A system and method for creating and composing musical works by selecting existing musical elements and applying modification modules to them. Existing musical selections reside in a database as metrics, or targets for the composition of new pieces. The present invention composes a new piece of music by, for example, specifying component musical features in the selected targets that should be modified or retained in creating the new work. Such musical features include, for example, rhythmic characteristics, harmonic characteristics, and the like. In this manner, a user who is, musically untutored is able to create satisfying, original works having desired characteristics as specified by the user.

Abstract: An apparatus and method for composing a musical rhythm whereby an initial generation rhythm population having a plurality of individual rhythms is provided, and a new generation rhythm population is repeatedly generated from a preceding generation rhythm population, beginning with the initial generation rhythm population. In order to evolve the rhythm populations, individual rhythms of a rhythm population of interest are evaluated according to a predetermined evaluating function to thereby determine a rhythm valuation, and genetic operations are performed on the rhythm population of interest in a manner such that the rhythm valuation will generally increase with each new generation rhythm population. The evolving operation is stopped when a predetermined terminating condition is met.

Abstract: A system, and related method, for creating music in real time includes an input device and a real-time music generator. The input device is used by a user to provide rhythm-related signals and pitch-related signals to the real-time music generator. The real time music generator receives the rhythm-related and pitch-related signals and creates or composes in real time music that includes pitches based on the pitch-related signals and rhythmic activity based on the rhythm-related signals. The input device can provide pitch related and rhythm-related signals that are representative of position, velocity, or acceleration. The real-time music generator can derive position, velocity, or acceleration from the pitch-related and rhythm-related signals and compose in real time music comprising pitches and rhythm activity based on the derived information.

Abstract: Separately from an accompaniment style data memory having stored therein one or more accompaniment style data each including performance data for an automatic accompaniment, a modifying data memory is provided which has stored therein one or more modifying data sets each including style designating data for designating any of the accompaniment style data stored in said accompaniment style data memory and modification instructing data for modifying contents of the accompaniment style data designated by the style designating data. Desired one of the modifying data sets is selected and read out from the modifying data memory. One of the accompaniment style data is read out from the accompaniment style data memory in response to the style designating data of the read-out modifying data set read out by said readout section and its contents are modified in accordance with the modification instructing data of the read-out modifying data set, so as to generate modified accompaniment style data.

Abstract: A karaoke music piece is selected through a music-piece selecting section 2, and a rhythm for the performance of the karaoke music piece is designated through a rhythm designating section 5. A performance section 6 reads a melody system track of the selected karaoke music piece, and supplies the performance data to a tone generator 8. On the other hand, a rhythm pattern producing section 7 produces a rhythm performance data for the designated rhythm based on a chord and a beat at that time, and supplies the produced data to the tone generator 8. Accordingly, the selected karaoke music piece can be played with the designated rhythm which is different from the original one.

Abstract: An electronic music system has an input device, one or more computer storage media, a rhythm generator, a pitch selector, and a sound generator. The input device generates rhythm-related input signals and pitch-related input signals in response to manipulations of the input device by a user attempting to create and play a solo. The computer storage media have a plurality of user-selectable musical accompaniment tracks over which the user can create and play the solo and a plurality of rhythm blocks wherein each rhythm block defines, for at least one note, at least a time at which the note should be played. The computer storage media also store at least a portion of the solo created by the user over a predetermined time interval in the immediate past.

Abstract: A pattern memory stores plural accompaniment patterns for each of plural accompaniment components, and each of the accompaniment components is composed of one or more musical instrument parts. An operator is provided for selecting a desired accompaniment pattern for each of the components, and the accompaniment patterns correspond, in accordance with a predetermined rule, to different possible manners in which the operator is actuated, so that a specific accompaniment pattern corresponding to a manner in which the operator is actually actuated. A new accompaniment pattern is registered into the pattern memory in accordance with the predetermined rule. Information indicative of the predetermined rule may be shown on a display. The pattern memory may store accompaniment patterns for each of plural different accompaniment styles, and specific accompaniment patterns may by shared between the accompaniment styles.

Abstract: An arpeggiator scans key-pushing data and produces in sequence a plurality of playing data according to results of the scanning. The arpeggiator includes a rhythm pattern table having at least one step which stores therein a time interval of a rhythm, a sound generation continuing time and a sound generation strength coefficient. The arpeggio playing is performed according to the rhythm pattern table. The arpeggiator further includes a scan mode table having at least one step which stores one of a plurality of scan functions. The key-pushing data is scanned by sequentially referring to the stored scan function so as to produce playing data based on which the arpeggio playing is performed. The arpeggiator has a mode where the key-pushing data is erased based on key-releasing data and another mode where erasure of the key-pushing data is prohibited based on given hold data.

Abstract: An automatic rhythm performance apparatus includes an effect addition device which adds a substantial musical effect to the automatic rhythm performance. The automatic rhythm performance apparatus includes a memory device for storing automatic rhythm performance data including a plurality of event data, a reading device for reading out the automatic rhythm performing data from the memory device, a detecting device for detecting a predetermined first event data at a predetermined performance progression timing which is associated with the automatic rhythm performing data read out from the memory device, and an adding device for adding a predetermined second event data to the automatic rhythm performing data. The apparatus provides an automatic rhythm performance with newly added performance data, such that substantial musical effect is added to the automatic rhythm performance.

Abstract: An electronic music system has an input device, one or more computer storage media, a rhythm generator, a pitch selector, and a sound generator. The input device generates rhythm-related input signals and pitch-related input signals in response to manipulations of the input device by a user attempting to create and play a solo. The computer storage media have a plurality of user-selectable musical accompaniment tracks over which the user can create and play the solo and a plurality of rhythm blocks wherein each rhythm block defines, for at least one note, at least a time at which the note should be played. The computer storage media also store at least a portion of the solo created by the user over a predetermined time interval in the immediate past.

Abstract: A performance-information analyzing apparatus, which is employed by an electronic musical instrument, is provided to analyze performance information which represents at least a pitch and a key-on timing with respect to each sound to be produced. A note length is calculated on the basis of a key-on interval representative of a time interval between two key-on timings. One note length, whose frequency of occurrence is relatively high, is selected from among a plurality of note lengths sequentially calculated with respect to a plurality of sounds to be produced. A pair of time and location of bar-line is automatically determined in accordance with a predetermined condition on the basis of the note length selected. The selection for the note length can be made under the consideration of the number of the notes which have the same pitch and which indicate a continuous sound to be described between two measures across the bar-line in the score.

Abstract: A plurality of image data and sequence data indicative of the sequence of displaying images are provided beforehand. The image data are sequentially read in accordance with the sequence indicated by the sequence data at the timing synchronous with automatic accompaniment. Image advancement in automatic accompaniment of a normal pattern differs from image accompaniment in automatic accompaniment of a fill-in pattern. The image display is made at the timing synchronous with chord advancement in automatic accompaniment.

Abstract: A rhythm pattern memory having rhythm patterns stored therein, the rhythm patterns being composed of pattern data corresponding to the types of percussion instruments, and a conversion table memory having a plurality of conversion tables for altering sound data each representative of a desired percussion instrument sound to sound data representative of an other percussion instrument sound are provided. A desired percussion instrument sound data in the rhythm pattern selected from the rhythm pattern memory by a rhythm pattern selector is altered to a desired percussion sound data according to the conversion table selected from the conversion table memory by the conversion table selector, and the resulting percussion sound data is converted by a sound source to the corresponding percussion sound signal to be output.

Abstract: While automatic accompaniment for chord, bass, rhythm etc. is performed in accordance with a normal pattern, the normal pattern is changed over to a fill-in pattern in response to actuation of a fill-in switch. Then, automatic accompaniment based on the fill-in pattern is repetitively performed as long as the fill-in switch is actuated. When the end of the fill-in pattern is detected, repeat control of the fill-in pattern causes the fill-in pattern to be repeated from a predetermined intermediate point (for example, the head of a predetermined intermediate measure of the fill-in pattern). As the result, the introductory portion of the fill-in pattern is performed only once so that it is never performed during repetition of the fill-in pattern. This can avoid undesirable musical unnaturalness due to repetition of the introductory portion.

Abstract: An automatic performance apparatus for an electronic musical instrument, which includes a change-instructing device for instructing alteration between first performance pattern and second performance pattern; a first controller for, when the readout device is reading out none of first to fourth automatic performance data at time alteration of a performance pattern is instructed by the change-instructing device, selecting the first automatic performance data or the second automatic performance data in accordance with an instruction of the change-instructing device, and causing a readout device to read out the selected automatic performance data in accordance with an instruction of a start-instructing device; and a second controller for causing the readout device, when reading out the first automatic performance data at a time alteration of a performance pattern is instructed by the change-instructing device, to stop reading out the first automatic performance data, read out the third automatic performance data

Abstract: When a switching operation from a normal pattern to a special pattern is instructed while an automatic accompaniment operation is being executed using normal pattern data, the pattern to be read out is switched from the normal pattern to the special pattern in accordance with the instruction. In this case, when it is instructed to switch the pattern within the instructed bar, only a rhythm part of a plurality of parts is switched from the normal pattern to the special pattern. When it is instructed to switch the pattern at the beginning of the next bar, other parts in addition to the rhythm part are switched from the normal patterns to the special patterns.

Abstract: In a pattern memory are stored plural performance patterns, each of which has one or more measures. Plural ones of the performance patterns are optionally selected and read out from the pattern memory, so as to make a music piece made up of time-series combinations of the selected performance patterns. The thus-made music piece is stored into a song memory. A suitable device such as a switch or a detector or a suitable process is employed to instruct to make a music piece in auftakt form. For this purpose, such a method may be employed, for instance, where it is detected that the melody part is in the form of an auftakt music piece, and in response to this detection, it is automatically instructed that the music piece made up of combinations of the performance patters should also be made in auftakt form.

Abstract: Left- and right-hand keystroke windows X.sub.L and X.sub.H are decided in accordance with the positions of player's left and right hands pressing keys. When the number of pressed keys in either one of the windows X.sub.L and X.sub.H are larger than a predetermined value, that window is decided to be used as a chord identifying window, and on the basis of a combination of pressed keys in the chord identifying window, an accompaniment chord is decided for automatic accompaniment.

Abstract: Rhythm patterns are created by producing primitive data not having any fixed meaning and by associating the primitive data with desired creating parameters among a plurality of creating parameters for specifying meanings of the primitive data. The rhythm patterns may be created by storing a rule data base for associating a plurality of parameters specifying the features of rhythm and a plurality of rhythm patterns beforehand in a memory, entering the plurality of parameters, making reference to the rule data base on the basis of the plurality of input parameters, and creating the desired rhythm patterns by an inference system.

Abstract: In an automatic arrangement apparatus, a melody of a part of an original musical tune is memorized in a melody memory (4), chord data of the original musical tune is memorized in a chord progression memory (5), and a rhythm pattern in a rhythm pattern memory (12) is selected in accordance with the style and composition of the original musical tune. At a timing of a note code of the selected rhythm pattern, a top-note, an additional tone, a bass part and a drum part are produced. The top-note is produced by referring to a top-note table stored in a top-note table memory (15) and corresponds with the chord. The additional tone is produced in accordance with the top-note and the chord on a basis of a voicing table stored in a voicing table memory (16). The top-note and additional tone can be selected at a continuous two-tone pair.

Abstract: An apparatus and method are provided for processing an audio signal conveying a musical passage so as to reveal the sequence of musical chords contained within that passage. The signal is amplified, filtered, and converted to digital data, which are then processed using digital filters to determine in real time the amplitude of every note within a predetermined note range. The most prominent notes are compared to chord patterns to determine which, if any, chord is implied, and the chord name is then displayed to the user. Further provided is a means for detecting and correcting for any deviation of the pitches of the notes in the passage from their standard frequencies.

Abstract: A provisional key is determined on the basis of a relatively small amount of performance information (for instance, information on one chord), while a definite key is determined on the basis of a relatively large amount of performance information (for instance, information on progression of plural chords). If a definite key has been determined, an automatic accompaniment tone is controlled on the basis of the determined definite key, but, if no definite key has been determined, an automatic accompaniment tone is controlled on the basis of the provisional key. The definite key based control is performed in a different manner from the provisional key based control. The definite key based control can achieve control of higher musical quality (for instance, tension notes can be used in a daring manner), but such a daring control is refrained in the provisional key based control.

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: 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: Rhythm patterns are created by producing primitive data not having any fixed meaning and by associating the primitive data with desired creating parameters among a plurality of creating parameters for specifying meanings of the primitive data. The rhythm patterns may be created by storing a rule data base for associating a plurality of parameters specifying the features of rhythm and a plurality of rhythm patterns beforehand in a memory, entering the plurality of parameters, making reference to the rule data base on the basis of the plurality of input parameters, and creating the desired rhythm patterns by an inference system.

Abstract: An electronic musical instrument, which, in consonance with the state of a local control function, is designed to play music independently or in conjunction with an external device, includes a detector for detecting a depression of a predetermined operation terminal immediately after power switch-on. It further includes an initial setup device for setting the initial state of the local control function in accordance with the data acquired by the detector.

Abstract: An electronic musical instrument has a keyboard and a sound source circuit for manual performance along with automatic accompaniment. A memory is provided for memorizing a plurality of rhythm patterns of the automatic accompaniment such as introduction, normal, fill-in and ending. The memory further stores timbre codes corresponding to the respective rhythm patterns, effective to specify tone color of the manual performance. Selecting switches are manually operated during the manual performance for selecting a desired rhythm pattern. A CPU accesses the memory to retrieve the selected rhythm pattern so as to switch the automatic accompaniment to the selected rhythm pattern. The CPU concurrently controls the sound source circuit to change the tone color of the manual performance according to a particular timbre code associated to the selected rhythm pattern.

Abstract: An electronic rhythm instrument having two or more rhythm switches which correspond to rhythmical sounds, and which generates rhythmical sounds corresponding to the rhythm switch operated. In the electronic rhythm instrument, one of the rhythmical sounds can be assigned commonly to a plurality of the rhythm switches, and further, a tone pitch and/or a tone volume can be assigned to each rhythm switch to which one of the rhythmical sounds is assigned commonly when a primary mode is selected. After the assignment, when a secondary mode is selected and one of the rhythm switches is operated, the preassigned rhythmical sound having the tone pitch and/or the tone volume assigned to the operated rhythm switch can be generated. The present invention can assign a tone-pitch scale and/or a tone-volume scale to a number of rhythm switches. When the tone-pitch scale is assigned to the rhythm switches, a melody can be produced according to the tone-pitch scale.

Abstract: An automatic playing apparatus according to the present invention, stores, in an automatic playing pattern data memory, chord, bass, drum data for each of a plurality of intro, normal and ending patterns, and drum data for each of a plurality of fill-in patterns, and reads, when a fill-in is selected via an operation panel, chord data and bass data, stored for an intro, normal, or ending pattern data, and drum data, stored for a fill-in pattern, to perform automatic playing. Further, an automatic playing apparatus according to the present invention includes an automatic playing pattern data memory wherein loud fill-in pattern data and soft fill-in pattern data are stored, sets an intonation value using an intonation dial as the performance is developed, and performs automatic playing based on either loud fill-in pattern data, if the intonation value is equal to or greater than a predetermined value, or based on the soft fill-in pattern data, if the intonation value is smaller than the predetermined value.

Abstract: The electronic musical instrument is provided with an accompaniment pattern memory storing a prescribed automatic accompaniment pattern composed of, at least, a chord tone part and a rhythm tone part, a keyboard manually operable to generate a command to designate temporary elimination of the chord tone part from the automatic accompaniment, a CPU responsive to the command from the keyboard to inactivate the chord tone part in the automatic accompaniment pattern, and a sound source circuit for performing the rhythm tone part of the automatic accompaniment pattern while inhibiting generation of the chord tones.

Abstract: Header control data for setting various characteristics of an automatic performance tone such as tone color, tone volume, tempo, effect and the like are stored in a header portion of a memory. The header control data are loaded into a buffer register, and various characteristics of an automatic performance tone to be generated are established on the basis of the header control data stored in the buffer register. In response to activation of a changing operator, the header control data in the buffer register are changed and a hence various characteristics of the automatic performance tone to be generated are changed. When the data in the buffer register is changed during an automatic performance, the header control data stored in the memory is changed in correspondence to the change.

Abstract: An auto-play electronic musical instrument stores note data of phrase tones for one bar corresponding to each of a plurality of keys of two octaves together with auto-accompaniment pattern data. Every time a key is operated, an adlib play is made by playing back corresponding phrase tones. When a key operation is interrupted during the adlib play, specific phrase tone are repetitively and automatically played back, thereby preventing a play from being interrupted halfway. The electronic musical instrument also stores fixed phrases such as introduction, fill-in, ending phrases, and the like, which are required according to the flow of a play. When one of the fixed phrases is played back by a selection button while the specific phrase is repetitively played back, the repetitive playback operation of the specific phrase is restarted when the playback operation of the fixed phrase ends. As a result, a user can play similar to a professional artist even with one finger in this key-on phrase play mode.

Abstract: An electronic musical instrument provides at least one pad to which a desirable musical tone such as a percussion instrument tone is assigned. When operating the pad, the corresponding musical tone is to be generated. Thereafter, when the pad operation is terminated, the musical tone can be simultaneously muted, decayed gradually or continuously generated for a while in accordance with the performer's control. An effected tone, i.e., a musical tone to which a musical effect is applied, can be also assigned to the pad. In this case, by operating the pad, the assigned effected tone can be generated.

Abstract: An electronic keyboard or similar electronic musical instrument having an automatic rhythm playing function and an ad-libbing function. The instrument includes keys to which an ad-libbing function is assigned. When one presses any of the ad-libbing keys on the keyboard, the instrument allows the operator to feel as if the operator were performing an ad-lib. Various kinds of ad lib plays are available by looping note data representative of a single melody or by transforming the note data to a plurality of melodies by chord detection.

Abstract: A rhythm performance apparatus comprises a memory, ten-key pad or selection switch, drum pads or operation member, and a CPU. The memory has a plurality of rhythm pattern storage areas, including at least one write enable area, for sequentially storing rhythm tones designated by instrument number data and an optional parameter such as a touch data and an instrument localization data in units of tone generation timings. The ten-key pad or selection switch is used for designating a desired storage area and one of the write enable areas. The drum pad and the operation member are used for designating an instrument number and a touch. The CPU copies an optional parameter of the designated instrument number in the designated storage area to the designated write enable area as an optional parameter corresponding to the designated instrument number in the designated write enable area.

Abstract: A rhythm pattern generating apparatus is provided having a layered neural network to perform learning with feedback to generate an output pattern signal indicative of a musical sound pattern. The output pattern signal is generated by the layered neural network with feedback in response to a performance operation of a player. The layered neural network generates the output pattern signal indicative of the musical sound pattern based on both an input pattern signal and a weight signal. The output pattern signal is fed back by the feedback circuit to the layered neural network to perform the learning process. A drum pad can be used to provide an input to the rhythm pattern generating apparatus or, specifically, to gate an input pattern selector for selecting input pattern signals. The layered neural network with the feedback can perform the learning process using a back propagation method.

Abstract: A rhythm play control device for an electronic musical instrument stores the number of operations of a single operator, and includes a memory device and a central processing unit which responds thereto to perform a change of play mode of the instrument.

Abstract: An electronic musical instrument is disclosed in which the selection of timbre and rhythm contol functions is simplified, and the number of function switches and control panel surface area can be limited, even when the instrument has a large number of available timbre and rhythm control functions. The invention provides an electronic musical instrument employing various types of musical tone control data which are divided into groups. Additionally, the invention provides an input device which includes a plurality of switches, each switch corresponding to one of the above described groups of musical tone control data. The input device is capable of detecting the operation of the above mentioned switches.

Abstract: An automatic performance apparatus provides a performance data memory including plural storing areas each capable of storing different performance data independently. The performance data can be selectively written in and read from each storing area. Based on the performance data read from each storing area, a musical tone signal for an automatic performance is generated independently. When the performance data memory includes two storing areas, the performance data concerning two tunes or two parts can be stored. One of two automatic performances based on the performance data can be selectively played. In addition, two automatic performances can be also player simultaneouly, wherein a predetermined delay time can be provided between two automatic performances. Further, predetermined kinds of rhythm patterns are pre-stored in a rhythm pattern memory in order to perform the desirable rhythm pattern as an accompaniment of the automatic performance.

Abstract: An auto-accompaniment apparatus for an electronic musical instrument which includes an accompaniment pattern storage means and chord progression pattern storage means. These accompaniment pattern and chord progression pattern are programmed in the storage means for each type of rhythms. Accompaniment pattern data and the chord progression pattern data are read out from the storage means in response to selection of rhythm. A modifier modifies accompaniment notes in the accompaniment pattern data in accordance with programmed chord name in the chord progression pattern data. A tone generator generates accompaniment tones on the basis of the modified accompaniment notes.

Abstract: An electronic musical instrument provides an automatic tonality designating function capable of automatically designating a desirable tonality based on a chord and a rhythm kind which are respectively designated. The chord is designated by simultaneously depressing plural keyboard keys, while desirable one of plural rhythm kinds which are predetermined in advance is designated by the performer. In addition, a desirable mode can be determined based on the designated chord. Based on the mode, chord and rhythm kind, an automatic accompaniment can be performed. Further, this electronic musical instrument can also provide a chord detecting apparatus capable of automatically detecting a desirable chord based on plural notes (or note names) designated by the performer. In such chord detection, an evasive note is automatically omitted from all notes designated by the performer, so that the desirable chord can be detected with accuracy.