JPH05181408A - Automatic music composing machine - Google Patents

Abstract

PURPOSE:To obtain the automatic music composing machine that makes a quick system response and generates a melody which matches the progress of music (chord progress) and is based upon musical knowledge. CONSTITUTION:A 1st current pitch candidate is generated according to a last pitch 202 and a random number 204. A sound kind and interval series generation block 208 classifies the kind of sound of the current pitch candidate and the interval from the last melody sound according to the music progress (current tonality 210 and current chord 212) in process and evaluates a melody pattern consisting of the current pitch candidate and a precedent melody which is generated yet. A matching module 214 retrieves the evaluated melody pattern in a melody pattern rule base 216. In case of a failure in retrieval, generation and retrieval are repeated through a next candidate generation module 220. A current pitch is decided on retrieval success.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music apparatus, and more particularly to an automatic composer that automatically composes a melody.

[0002]

2. Description of the Related Art Conventionally, some automatic composers that automatically generate a melody are known (USP 4,399,73).
1, USP 4,664,010, WO NO.86 / 05619, JP-A-62-187
No. 876). The automatic composer of USP 4,399,731 uses a trial-and-error method in which random numbers are used to generate a melody pitch sequence as a melody generation principle. Therefore, although the melody generation space is infinite, the efficiency for obtaining a desirable melody is too low due to lack of composition knowledge. USP 4,664,010 and WO N
The composer of O.86 / 05619 is a melody generator of the type that transforms a given melody, and a mathematical method (conversion of pitch sequence, two-dimensional space of pitch / length sequence) is used for conversion. (A linear transformation for) is used. Therefore, the conversion space is limited and has only fixed and mathematical (not musical) composition ability. The composer disclosed in Japanese Patent Laid-Open No. 62-187876 is a melody generator that uses a Markov model to generate pitch sequences. The melody created from the pitch transition table representing the Markov process of the pitch sequence is bound by the musical style inherent in the transition table. Therefore, although this melody generation device can generate a musical melody with relatively good efficiency, it can generate only a limited style of melody, and the composition space that can be provided is narrow. What is common to the above prior arts is that (1) the composer lacks melody analysis and evaluation capabilities, (2) the melody analysis and evaluation capabilities are not used for melody generation, (3) Therefore, the ability to generate musical melody is low,
Is.

In view of such a point, the inventor of the present invention discloses
63-250696, 63-286883, melody analysis,
We propose an automatic composer that uses the evaluation ability. This automatic composer, as the musical knowledge of the melody, considers the melody as a mixed sequence of harmony and non-harmonic sounds, analyzes the relationship between the non-harmonic sounds and the harmony sounds, and classifies the non-harmonic sounds. Has harmony classification knowledge. This non-harmonic classification knowledge is used to analyze the melody (motif) input by the user. Furthermore, the non-harmonic sound classification knowledge is also used for melody generation. This composer produces a melody in two stages. In the first stage, a harmony tone sequence (arpeggios) is generated (a harmony tone sequence is obtained by adapting an arpeggio characteristic pattern generated by developing a motif based on a motif to music progression (chord in progress)). Non-harmonic sounds are generated in the second stage, and they are inserted between the harmony sound strings (The non-harmonic sounds are developed based on the motif and the non-harmonic sound characteristic patterns are adapted to the music progress (scale in progress). It is obtained by passing through the non-harmonic classification knowledge. This composer can generate musical melody that reflects the characteristics of the motif, but has the following drawbacks. (A) A considerable amount of data processing is required for analysis of motifs as pre-processing for melody generation, and creation of ideas of melody generated from motifs (feature patterns of arpeggios and non-harmonic tones). (B) The method of generating a melody in two stages is different from the normal human melody creation process. Therefore, it is impossible to realize a faithful artificial intelligence in composition. (C) Real-time melody generation is difficult because of preprocessing and two-step melody generation. In fact, this composer composes in units of one bar in a non-real time, and is composed so that once the composition is completed, the composition is played through the sound source. According to this composition method, even if a melody idea (characteristic pattern of arpeggio and non-harmonic sound) is given in advance, it is difficult to carry out the realization of the idea (melody generation) in real time. This is because the idea realization process (two-stage melody generation process) is intensively performed at a specific point in time, such as bar time, and when a composer is combined with a performance system, This is because a performance delay (for example, a delay in sounding a melody sound) occurs when (computer) processing is concentrated. Therefore, (A) musical melody can be generated in one stage,
(B) An automatic composer capable of real-time melody generation and performance is desired.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic composer capable of generating a musical melody in one stage with the support of music analysis and evaluation capabilities. Another object of the present invention is to provide an automatic composer capable of generating and playing a melody on a real time basis.

[0005]

According to the present invention, a music progression giving means for giving a music progression, and a rule base of a melody pattern in which a tone sequence of a melody is patterned by a tone type sequence and a tone sequence are stored. Melody pattern rule base means for producing a melody that composes a melody pattern rule in the melody pattern rule base means and that conforms to the music progression from the music progression means. An automatic composer is provided. According to this configuration, the melody can be generated without dividing into the generation of the harmony tone sequence and the addition of the non-harmonic tone sequence. In addition, since the generated melody matches the melody with the music progression that is the musical background of the melody and also with the rule (melody pattern rule) placed in the melody pattern rule base means, this configuration is musical. It is possible to provide a preferable melody relatively efficiently. That is, the characteristics of the generated melody evaluated by a musical progression (context) of the melody (for example, a tonal harmony background such as an ongoing chord, key, or scale (tone sequence and pitch). Sequence) satisfies the melody pattern rule.In other words, the melody is the one that is embodied (applied) according to the musical context of the melody for which the melody pattern rule is to be composed. Compared to the automatic composers disclosed in JP-A-63-250696 and JP-A-63-286883, it is possible to generate a melody with a much smaller amount of data processing. To facilitate the realization of.

One mode of the real-time composer has, in addition to the above configuration, a tempo designating means for designating a performance tempo,
The melody generating means comprises real-time melody generating means for generating a melody on a real-time basis according to the performance tempo. Further, the real-time composer has real-time melody playing means for playing the melody generated by the real-time melody generating means as sound in real time. A real-time composer capable of real-time performance is (a) waiting time from the user's composition start instruction to the start of melody performance (overhead time)
Is short, and (b) it is required to keep the performance tempo at which the melody is played. For this purpose, it is desirable that the composer perform the composition process "distributed" with respect to the time axis. That is, avoid an extreme concentration of temporary data processing. This can be done by limiting the number of melody sounds generated at one time (for example, by limiting to one). Therefore, the method of sequentially determining (generating) the melody sounds is suitable for real time (although it is not always necessary to generate and play one sound at each sounding time). In one aspect of an automatic composer for sequentially generating melody sounds, the melody generating means stores the melody patterns up to the preceding melody sound by the pitch sequence and the tone type sequence in order to sequentially generate the melody sounds. Storage means, pitch candidate generating means for generating a first pitch candidate of the current melody sound to be newly generated, pitch and pitch of the first pitch candidate as the pitch of the previous melody sound The melody pattern storage means is updated by using the pitch / tone type classifying means for categorizing based on the current situation of the music progression, and the tune and tone type of the classified first pitch candidate, and the current melody is updated. Evaluation target melody pattern forming means for forming a melody pattern up to a sound candidate as an evaluation target, and the melody pattern rule base for the melody pattern formed as an evaluation target Rule-based search means for searching a stage, another candidate generation means for generating another pitch candidate for the current melody sound when the search is unsuccessful, and the pitch / tone type for the another pitch candidate. A repeating unit that repeats the operations of the classifying unit, the evaluation target melody pattern forming unit, and the rule-based search unit, and a sound that determines the pitch candidate for the search as the pitch of the current melody sound when the search is successful. And a high determination means. The music progression giving means is a chord progression creating means for producing a chord progression,
It can be configured with a tonality instructing means for instructing tonality (key, scale). Furthermore, according to the present invention, an automatic composer having a function of expanding the melody pattern rule base by a melody from a user is provided.

One aspect of a composer having a rule-based extension function is a user melody input means for inputting a melody from a user, and a pattern type recognition of the melody input by the user melody input means in accordance with the music progression. A melody pattern recognition means for forming a melody pattern represented by a sequence and a pitch sequence, and a melody pattern from the melody pattern recognition means is added as an additional rule to the melody pattern rule base means to extend the melody pattern rule base. And a melody pattern rule base expanding means. With this configuration, it is possible to enhance the ability to generate a melody that suits the taste of the user. It also allows users to actively participate in the composition. The melody pattern rule base may be prepared for each music style. In that case, in order to save the storage amount, it is desirable to link the music style groups suitable for each melody pattern rule group so as to make the storage common. Further, according to the present invention, a music progress giving means for giving a music progress, a melody pattern rule base means for storing a rule base of a melody pattern obtained by patternizing a melody sound string with a tone type string and a pitch string, and The tone sequence candidate generating means for generating the tone sequence candidates of the melody to be played, and the tone sequence candidates from the tone sequence candidate generating means are pattern-recognized based on the music progression, and are expressed by the tone type sequence and the tone sequence. Melody pattern forming means for forming a melody pattern, a rule base searching means for searching the melody pattern rule base means for the melody pattern from the melody pattern forming means, and the melody until the search is successful. The pattern rule base means is used until the rule of the melody pattern that matches the search target is found. Repeating means for repeating the operations of the candidate generating means, the melody pattern forming means, and the rule-based searching means while changing the sound string candidates, and generating a sound string candidate for success when the search is successful. An automatic composer is provided, which comprises: a determining unit that determines a sound string. With this configuration, the composer can determine and generate two or more melody sounds at one time.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. Features Automatic composer (automatic melody generator) according to the present embodiment
The main features of are the music composition condition function, the melody pitch sequence generation function, and the melody pattern rule expansion function.
The features of each are described below. Composition Conditioning Device (FIG. 1A) FIG. 1A is a functional block diagram of the composition condition device 100 incorporated in the embodiment. The music composition device 100 includes a music structure database 110 and a chord progression database (CP
The selected chord progression (CP) 160 is generated based on DB). Furthermore, the composition device with composition condition 100 uses the music structure data 11
0, song style input 130 and rhythm pattern database 1
A selection rhythm pattern 170 is generated based on 50.
The column of selected chord progressions 160 represents the chord progression of the song being composed. The row of the selected rhythm pattern 170 represents the rhythm (sound length row) of the composed melody. The selected chord progression 160 is obtained by taking a chord progression suitable for the selected music structure 120 from the chord progression database 140. The selected rhythm pattern 170 is selected from the rhythm pattern database 150. The selected music structure 120 and the musical style input 1
It is obtained by extracting the rhythm pattern that matches 30. In FIG. 1A, the music structure database 110
Consists of an upper structure database 111 and a lower structure database 112. The superstructure database 111 stores a database of superstructures (for example, passages) of music. The substructure database 112 stores a database of a substructure of music (for example, a passage internal structure). For example, each floor structure entry of the lower structure database 112 has information indicating an 8-bar structure when the upper structure is regarded as a 8-bar passage. The selection module 116 takes upper structure data from the upper structure database 111 and stores it in the selected music structure 120 as a selected upper structure 121.
The adequacy module 145 takes the chord progression that matches the selected superstructure 121 from the chord progression database 140 and generates it as the selected chord progression 160. The aptitude module 117 selects from the lower structure database 112 a lower structure column having an attribute that matches the selected upper structure 121 (for example, 8
A bar structure) is taken out and set in the selected music structure 120 as a selected substructure 122. The selection substructure 122 is provided to the suitability module 155 for attribute testing. The musical style input 130 includes a designated rhythm 131 and a designated beat (or tempo) 132. Both the designated rhythm 131 and the designated beat (or tempo) 132 are provided to the fitness module 155 for attribute testing. The suitability module 155 searches the rhythm pattern database 150 for a rhythm pattern that matches the selected substructure 122 and has an attribute that matches the specified rhythm 131 and the specified beat (or tempo) 132, and selects it.
70 is generated. The selected rhythm pattern 170 generated in this way defines the tone length sequence of the automatic melody (pronunciation and muffling timing of each melody tone). In this way, the music composition condition device 100 uses various databases which are knowledge resources and music information (selection chord progression, selection rhythm pattern) appropriately conditionalized based on the music style input from the user as a part of composition. To generate. Since the tone length sequence of the melody is obtained from the selected rhythm pattern 170, the melody is completed by generating the tone sequence of the melody. In the music structure data 110 of FIG. 1A, the hierarchical levels of the structure are upper and lower two levels, but the number of hierarchical levels may be one or three or more. Therefore, the number of hierarchical levels of the selected music structure may be any number of 1 or more. In addition, the musical style input is designated rhythm 13 in FIG. 1A.
Although it is given by 1 and the designated beat (tempo) 132, other musical style parameters may be used.

Pitch Sequence Generating Device (FIG. 1B) A melody pitch sequence generating device 200 incorporated in the automatic composer is shown in a functional block of FIG. 1B. The purpose of the pitch string generation device 200 is to generate a pitch string of a melody. The pitch string generation device 200 can be combined with (but not necessarily limited to) the composition / conditional device 100 as shown in FIG. 1A. In that case, the pitch train generation device 2
00 generates the determined current pitch 224 each time the selected rhythm pattern 170 indicates the sounding timing of the melody sound. The row of the determined current pitch 224 defines the pitch row of the melody. In generating the determined current pitch 224 in FIG. 1B,
The pitch train generation device 200 adds the previous pitch 202 and the random number from the random number generation module 204 in the adder 206 to generate the first current pitch candidate Markov. The pitch type / pitch string generation module 208 to which the current pitch candidate is input generates a pitch type and pitch of the pitch string in which the current pitch candidate is added to the generated pitch string. The tone type / tone sequence generation module 208 uses the information of the current tonality 210 (key, scale) and the current chord 212 to classify the tone type and tone of the current pitch candidate. The output of the tone type / tone string generation module 208 represents the pattern of the melody tone string up to the current pitch candidate, and the information is given to the matching module 214. The matching module 214 searches the melody pattern rule base 216 for the given melody pattern. As a result of the search, when the melody pattern rule base 216 does not include an entry corresponding to the melody pattern defined by the output of the module 208, the search result determination module 218 is NO, and the next candidate generation module 220 generates the next current pitch candidate. To be done. Next candidate generation module 2
20 uses the current pitch + random number information indicated by 222 to generate the next current pitch candidate. The operations of the tone type / tone string generation module 208 and the matching module 214 are repeated again, and the validity of this new current pitch candidate is evaluated. If the melody pattern corresponding to the output of the tone type / pitch sequence generation module 208 is entered in the melody pattern rule base 216, YES is satisfied in the search result determination module 218, and the current pitch candidate at that time is generated as the determined current pitch 224. To be done. When the next melody sound is generated, the current pitch 224 is determined as indicated by 226.
Becomes the previous pitch 202 and the above-described operation is repeated to determine a new current pitch. In this way, the pitch string generation device 200 can sequentially generate the pitches of the melody in real time by using the melody pattern rule base 216. Therefore, the pitch train generation device 2
00 output (determined pitch 224) to real-time performance system 228
By giving to (including electronic sound source), composition and performance can be executed simultaneously in real time. That is, the pitch string generation device 200 has a real-time composition capability.

Melody pattern rule expansion device (see FIG. 1)
C) FIG. 1C shows a functional block diagram of the melody pattern rule expansion device 300. Melody pattern rule expansion device 3
00 realizes the function of expanding the melody pattern rule base referred to by the pitch sequence generating device (automatic melody generating device) as shown in FIG. 1B. Of the melody pattern rule base 330, 330F is a fixed melody pattern rule base fixedly incorporated in the automatic composer, and 330E is an extension of the melody pattern rule base. Melody pattern rule expansion device 3
00, the melody pattern rule of the extension section 330E can be created based on the user input melody 302. The part that creates this rule is the melody pattern (tone type / tone string) generation block 310.
The user input melody 302 is input to the pitch classification module 312 and the tone type classification module 316 of the melody pattern generation block 310. Pitch classification module 31
2 forms a pitch sequence by evaluating the pitch formed between the adjacent sounds of the user input melody 302. For example, 31
As shown in FIG. 4, the pitch classification module classifies the pitches such as whether the note type is the same sound (no motion), ascending sequential progress, descending sequential progress, ascending jumping progress or descending jumping progress.
316 classifies the sound type of each sound of the user input melody 302 to form a sound type sequence. The note type classification module 316 uses the information of the key scale code 318 and the information of the standard pitch class set (PCS) memory 320 of each note type to classify the note type of the melody note. For example 32
As shown in FIG. 2, the tone type classification module 316 classifies the tone type of the melody sound as if it were a chord tone, a scale note, an adjustable note, a tension note or an a void note. Pitch classification module 3
The 12 note sequence outputs and the note type classification module 316 note type output represent the pattern of the user input melody 302, that is, the rule of the melody pattern derived from the user input melody. This rule is stored in the expansion section 330E of the melody pattern rule base. When creating a melody,
The automatic melody generation module 340 (for example, the pitch string generation device 200 in FIG. 1B) generates a melody by using the entire melody pattern rule base 330 including the extension section 330E. By providing such a melody pattern rule expansion device 300, it is possible to provide an automatic composer having a high ability to generate a melody desired by the user.

Hardware Configuration (FIG. 2) FIG . 2 shows a typical hardware configuration that realizes the functions described in FIGS. 1A, 1B and 1C. CPU2 is R
The entire system is controlled according to the program stored in the OM4. The ROM 4 stores various fixed data (such as the above-mentioned database) in addition to the program. The RAM 6 stores various variables and temporary data and is used as a working memory of the CPU 2. The keyboard 8 can be composed of a keyboard of an ordinary electronic keyboard instrument and is used for the user's melody input. The input device 10 includes a musical style input device, an input device for starting and stopping automatic melody generation, and the like. The states of the keyboard 8 and the input device 10 are appropriately read by the CPU 2 and the corresponding processing is performed. The sound source 12 generates a musical tone signal under the control of the CPU 2. The sound system 14 receives the tone signal from the sound source 12 and reproduces the sound. Display device 16
Displays system functions and messages under the control of the CPU 2. The display device 16 includes an LED and a liquid crystal display. The clock oscillator 18 generates a pulse each time the music resolution time elapses, interrupts the CPU 2, and executes an interrupt program (interrupt routine described later).

Automatic Melody Generation Function (FIG. 3) FIG. 3 shows a block diagram of the automatic melody generation function incorporated in the configuration of FIG. The automatic melody generation function has an input unit 20 for inputting information necessary for melody generation, a unit 30 for manually generating music data, an analysis and evaluation unit 40 for analyzing and evaluating a melody, a clock oscillator 60, a rhythm counter 70, and a melody memory 80. , Sound source 50. The input means 20 includes a rhythm selector 21 for inputting a designated rhythm type RHY, a keyboard device 22 for inputting a key code KC, and a tempo setting means 23 for inputting a designated tempo TMP. The input means 20 includes means for instructing to stop the automatic melody generation in addition to this, but it is not shown. In the generating means 30, the structure generating means 32 extracts music structure data from the music structure database 31. The extracted music structure data is composed of upper structure data and lower structure data matching it. The chord generation means 34 takes out chord progressions matching the music structure from the chord progression database 33 and outputs the chord CHO at the current time T from the rhythm counter 70. The rhythm pattern generating means 36 uses the rhythm pattern database 35 to select a rhythm pattern P that matches the chord progression and the musical style (designated rhythm type RHY and designated tempo TMP).
Take out the AT. Specifically, the designated tempo TMP is converted into a beat type BEAT by the tempo beat correspondence map 48,
This is given to the rhythm pattern generation means 36 as one of the conditions for the rhythm pattern generation in the rhythm pattern generation means 36. As described above, the chord generation means 34, the structure generation means 32, and the rhythm pattern generation means 36 are shown in FIG.
It has the function of the aptitude module as described in. The random number generation means 38 gives the pitch data generation means 39 the random number data from the random number memory means 37 as RAN. The pitch data generation means 39 generates a current pitch candidate from the random number data RAN and the previous pitch. In the analysis / evaluation means 40, the tone type classification means 42 uses a key, a designated rhythm type RHY, and pitch data (output of the pitch data generation means 39 or keyboard device 22
Output of the standard pitch class set 4
Classify with reference to 1. The pitch classifying unit 43 classifies the pitch formed between the previous pitch and the current pitch (candidate) as NT. The classification results of the pitch type classifying unit 42 and the pitch classifying unit 43 are stored in the pitch type and pitch string memory 47. The fixed melody pattern database 45 is stored in the ROM 4 of FIG.
The expanded melody pattern database memory 46 is stored in the RAM 6 for expanding the melody pattern database. The evaluation means 44 searches the fixed melody pattern database 45 and the extended melody pattern database memory 46 for the tone type, tone type and tone sequence (melody pattern) from the tone sequence memory 47, and if there is a corresponding rule as a result of the search, it is OK. The evaluation result JDG is output. This determines the current pitch. The rhythm counter 70 counts a clock pulse given from the clock oscillator 60 at each music resolution time and outputs the current time data T, and the melody memory 80 stores the data of the melody sound train which is a train of pits and T. The sound source 50 receives the pitch data PIT at each sounding timing of the melody sound and generates a corresponding tone signal.

Expression Format of Various Music Elements (FIGS. 4 to 6) In the following description of the embodiments (especially, the description of the flow), various music elements mainly use a character expression (symbol expression), and if necessary, a numerical expression. Is used. Correspondence between the character representation and the numerical representation (machine level representation) of various music elements will be described below with reference to FIGS. The character representation of the code type is CHO (TYPE). Code type MAJ is number 0, MIN is number 1, 7TH is number 2, M
IN7 is numerically expressed as 7 and MAJ7 is numerically expressed as 4. The data length of the code type in the machine is, for example, 6 bits, and it is possible to represent a maximum of 64 code types. The character representations of the chord root and the key are CHO (ROOT) and KEY, respectively. A chord root or key is specified by its pitch class. The pitch class C is represented by a numerical value 0, C # is 1, D is 2 and so on, and B is represented numerically by 11. Therefore, the effective data tone of the chord root and the key is 4 bits. The upper music structure in the music structure (upper / lower) is character-represented by STR1D, and the lower music structure is character-represented by STR2D. Upper music structure of AA is 1H, BB is 2H, CC is 4
It is expressed numerically by H ... Substructure aa is 1H,
bb is expressed numerically by 2H, cc is expressed by 4H ... In the apparatus of the embodiment, the effective length of the structure data is represented by 4 bits (nibbles). Rhythm type is expressed by RHY. Rhythm type ROCK (rock) is 1H, DISC (disco) is 2H, 16BE (16 beats) is 4H, SW.
IN (swing) is 8H, WALT (waltz) is 10
Each is represented numerically by H. The pitch data and the key code are represented by PIT and KC, respectively. The pitch data and the key code are specified by the pitch class and octave. In the embodiment, the numerical value 0 represents the pitch of C2 (the pitch class is C and the octave is the second octave), and the pitch is expressed by the numerical value which is incremented by 1 every time the pitch increases by one semitone. The tone type is expressed in NT characters. The tone type chord tone (CHOT) is 0, and the adjustable note (AVA).
I) is number 1, scale note (SCAL) is number 2,
Tension note (TENS) is expressed by numerical value 3, a void note (AVOI) is expressed by numerical value 4, end mark (END) is expressed by FH, pitch symbolic expression is MT.
The same sound (SAME) has a numerical value of 0 and progresses upward (+)
STEP) is a numerical value 1, descending sequential progress (-STEP) is a numerical value 2, ascending jump progress (+ JUNP) is a numerical value 3, descending jump progress (-JUNP) is a numerical value 4 and a delimiter mark (SEP) is FH. It The evaluation result is represented by JDG (flag JDG) in characters, the evaluation result of NG is represented by the numerical value 0, and the evaluation result of GOOD is represented by the numerical value 1. USE
R MEL expresses NO by the numerical value 0 and YES by the numerical value 1. The elements of the pitch class set (pitch class) are expressed as follows. Pitch class C is 1H, C # is 2
H and D are 4H or less, and B is similarly expressed by 800H. That is, the pitch class is represented by the bit value "1" at the bit position in 12 bits (for example, the least significant or 0th bit position is C). A pitch class set, which is a set of pitch classes, is expressed by a bitwise logical sum between such 12-bit data expressions. For example, a pitch class set consisting of C and D is expressed by a logical sum of 1H and 4H, that is, 5H. Each character representation of the pitch class set is PCS (C
T), and if PN, SN, AN, and AV are used instead of CT, the pitch class set of tension note, scale note, ablatable note, and a void note is expressed in characters, respectively. The character representation of the rhythm pattern is P
It is AT. The elements of the rhythm pattern are represented by 16-bit data, and each bit position represents each timing when one bar is divided into 16 parts. The rhythm pattern is composed of a key-on pattern (sound generation timing pattern) and a key-off pattern (silence timing pattern). The sound generation timing or the mute timing on the bar line is numerically expressed by 1H. The sounding / silence timing at 1/16 bar after the bar line is represented by 2H. The same applies hereinafter. A key-on pattern or a key-off pattern, which is a set of elements of a rhythm pattern, is expressed by a bitwise logical sum of 16-bit data elements. For example, in the case where one measure is 4 beats, the key-on pattern in which the first and second beats are the sounding timing is a logical sum 11H of 1H and 10H.
Represented by

Storage Format of Various Data (FIGS. 7 to 14) Next, examples of various data will be described with reference to FIGS. 7 to 14. The data length (1 word) is 16 bits. The name of the data memory and the head address (head symbol address) of the data memory are called with the same name. For example, the chord progression data memory is called CPM, and the head address of the chord progression data memory is also called CPM. FIG. 7 shows a standard pitch class set database memory. The standard pitch class set database memory comprises a chord tone memory CT, a tension memory PN, and an orby scale note SN. The chord tone memory CT is a table that receives chord types and returns the standard pitch class set of the chord types. For example, code tone memory C
The data 91H at the symbol address MAJ of T indicates that the standard pitch class set of the chord type MAJ is C, E, and G. Here, the standard pitch class set is a pitch class set where C is the chord root. In other words, the standard pitch class set database memory expresses the pitch class set of each note type with a relative pitch (pitch structure). The tension note memory PN is a table for changing the standard pitch class set of tension notes for chord types. For example, for the chord type MAJ, the tension note memory PN returns data 44H indicating that B, F #, A and B are standard pitch class sets. The scale note memory SN is a table for changing the standard pitch class set database memory of the scale note for the rhythm type (or scale type). For example, for a rhythm type rock (ROCK), the scale note memory SN replaces the data AB5H, and the standard pitch class set database memory for scale notes is C, B, E, F, G,
Notify A and B. The fixed melody pattern database memory MPM1 shown in FIG. 8 and the fixed melody pattern database memory MPM1 indicating the tone type, pitch data memory NTM, MTM are arranged in the ROM 4 of FIG.
The memory MPM1 realizes a melody pattern rule base, and each rule has 2 words (32 bits).
It is expressed by. Each rule consists of a tone type string and a pitch string. For example, the first rule of the memory MPM1 is the code tone (C
It shows a pattern in which an upward sequence (+ STEP) from HOT) progresses to an available note (AVAI), and an upward sequence from an available note (+ STEP) progresses to a chord tone (CHOT). Two
In the word rule data, each tone type and pitch is represented by 4 bits (1 nibble). Therefore, in the case of this storage format, the maximum number of sounds of the melody pattern expressed by the rule is four. The SEP nibble of the pitch sequence word which is the second word of the rule is the end mark (separation mark between rule entries) of the rule. At the final address of the memory MPM1, a code END indicating the end of the fixed melody pattern rule base is written. The memory MPM2 having the same storage format as the MPM1 is provided in the RAM 6 for expanding the melody pattern rule base.

Tone string memory NPM and tone string memory MPM
Represents an input melody pattern (a melody pattern derived from a user input melody from the keyboard 8 or a melody pattern derived from an automatically generated melody). NPM and MPM are both formed in RAM6 1
In the word (16-bit) tone sequence memory NPM, each tone type is represented by 1 nibble (4 bits). Similarly, in the 1-word (16-bit) tone sequence memory MPM, each tone data item is 1 nibble (4 bits). Bit). Therefore, an input melody pattern for a maximum of four tones is expressed by NPM and MPM. As will be described later, NPM and MPM are operated as right shift registers in units of nibbles for generation of new melody sounds (automatic generation or input of new melody sounds from keyboard 8). At the start of generation or at the timing of bar lines, the contents of NTM and MTM are initialized so that the nibble at the right end becomes the END nibble. Therefore, NTM and MTM shown in FIG. 8 show a state in which patterns of up to three sounds are included after initialization. In the expansion processing of the melody pattern rule base, the contents of NTM and MTM are added to the expansion melody pattern rule base in the RAM 6 as additional rules. In the automatic melody generation process, the contents of NTM and MTM are used to search the melody pattern rule base for the presence or absence of the corresponding rule entry. Figure 9 shows the tempo / bit conversion map TBT
M and random number memory RANM are shown. Both TBTM and RANM are stored in ROM4. Tempo / bit conversion map T
The BTM is a table for returning the beat type (for example, 16 bits) with respect to the designated tempo from the input device 10. The output of the tempo / bit conversion map TBTM is used to condition the rhythm pattern as described in FIG. 1A. The random number memory RANM stores random number data. Random number memory RAN
M is used when obtaining a new pitch candidate of a melody tone in the melody automatic generation mode. Random number memory RAN
At the final address of M, an end mark (ffffH) indicating the end of random number data is stored. FIG. 10 shows the chord progression database memory CPM. This memory CPM is stored in the ROM 4 of FIG. The memory CPM realizes a database of chord progressions. Database C
Each PM chord progression entry consists of the following data items: The first word represents the attribute of the rhythm type. For example 00
In the 111 attribute data, the chord progression is rhythm type rock (ROCK), disco (DISC), 16 beats (1
6 BE) is shown. The rhythm type attribute data item of the chord progression entry is used for the attribute test with the designated rhythm type as described in FIG. 1A. In the second word of the chord progression entry, the length is stored in the upper part and the music structure attribute is stored in the lower part. For example, if the music structure attribute data item is 101, it indicates that the chord progression has an attribute suitable for the superstructure AA or CC but not suitable for the superstructure BB. The music structure attribute data item is used in the chord progression adequacy test for the selected superstructure as described in FIG. 1A. The data body of the chord progression is stored in the third and subsequent words of the chord progression entry. Each word is the root of the code in the upper word (1 nibble), the code type in the middle (2 nibbles), and the lower (1 nibble).
(Nibble) memorize the chord tone. At the end of each chord progression entry, the word 0000H is stored as a separator (separation mark) between the entries. At the end of the chord progression database memory CPM is stored the word ffffH representing the end mark of the database.

FIG. 11 shows a music structure database memory. The music structure database memory is located in ROM 4 of FIG. The music structure database memory includes a higher structure database memory STR1 and a lower structure database memory S.
It consists of TR2. High-level structure database memory STR
Reference numeral 1 stores a database of higher-order structure sequences that represent the structure of a song as a passage structure sequence. Therefore, for example, the first nibble in which the upper structure sequence data of a maximum of four movements is stored in each word is A
A, the second nibble is BB, the third nibble is AA, and the fourth nibble is END, the musical composition word is AA for the first movement, BB for the second movement, and AA for the third movement (final movement). ..
A word ffffH indicating the end of the database is stored at the end of the upper structure database memory STR1. The substructure database memory STR2 has a passage internal structure (8
Store a database of bar structure). Each substructure entry of the substructure database memory STR2 consists of 3 words, the first word is assigned to the attribute, and the second and third words are assigned to the structural representation of 8 bars. The attribute word (first word) has information indicating a higher-level structure to which the entry internal structure (structure sequence of 8 measures) conforms. For example, the attribute data item 1100 indicates that the internal structure of the phrase is compatible with the CC or DD phrase but not with the AA or BB phrase. The attribute data in the substructure database memory is used in the attribute test for selecting the substructure that matches the superstructure as described in FIG. 1A. Substructure entry 2nd and 3rd
The structure of each bar in a word is represented by 1 nibble (4 bits). Specifically, the first nibble (most significant 4 bits) of the second word is the structure of the first bar, the second nibble is the structure of the second bar, and so on. Similarly, the first nibble of the third word is the structure of the fifth bar. , 4th nibble of 3rd word (least 4 bits)
Indicates the structure of the eighth measure. The word ffffH indicating the end mark is stored at the final address of the lower structure database memory STR2.

FIG. 12 shows the rhythm pattern database memory RPM. Rhythm pattern database memory R
PM is stored in the ROM 4 of FIG. The rhythm pattern database memory RPM realizes a database of automatically generated melody rhythm patterns (tone sequences). Each entry of the rhythm pattern database memory RPM is made up of 4 words, the first word stores the attribute of the rhythm type, the second word stores the attribute of the beat type in the upper and the attribute of the lower structure of the music in the lower.
The word represents the key-on pattern and the fourth word represents the key-off pattern. If the rhythm type attribute data item in the first word of the entry is 00111, the rhythm pattern of the entry is the rhythm type lock (ROC
K), disco (DISC), 16 beats (16BE)
Suitable for, but swing (SWIN) and waltz (WA
It is not suitable for LT). Further, if the structure attribute data item placed in the lower second word of the rhythm pattern entry is 101, it means that the rhythm pattern of the entry is suitable for the bar structure of aa or cc but not for the bar structure of bb. The key-on pattern stored in the third word of the entry describes the sounding timing of each note in one bar. The key-off pattern in the 4th word describes the mute timing of each note within one bar. The word ffffH representing the end mark is stored at the final address of the rhythm pattern database memory RPM. The attribute data in the first and second words of each rhythm pattern entry is selected from the rhythm pattern database as described in FIG. 1A. Used in aptitude tests when searching for rhythm patterns that match the structure, specified rhythm, and specified beat (tempo). Other constants and variables used in the embodiment will be described with reference to FIGS. 13 and 14. MPM2 represents an extended melody pattern database played by the user or its start address. The extended melody pattern database MPM2 is the RAM of FIG.
MPM2SIZE created in 6 represents the memory size of the extended melody pattern database. MEAS is a CP that represents the length of one bar C is a chord progression length counter (chord length accumulator), T is a rhythm counter representing the current time, BAR is a bar counter, and the bar counter BAR value is determined by the integer part of T / MEAS. , PMP represents a designated tempo, BE
AT represents a designated beat type and is obtained by passing a designated tempo PMP to a tempo / beat conversion map. STR1 is a high-level structure database memory STR1
STRD2 representing the upper structure (eg, AA passage structure) selected from the lower structure database memory STR2
Represents a substructure (bar structure, for example, aa) selected from. PTI represents the current pitch and PREV PIT represents the front pitch.

STR1 P is STR2, which is a word pointer of the upper structure database P is a word (address) pointer of the lower structure database. STR1
P is a counter of the upper structure element (a passage counter in a word representing a music structure in the upper structure database memory)
Is STR2 P is a counter of a substructure element (a bar counter for an 8-bar structure which is the second and third words in the entry of the substructure database memory). Counter STR1D P is used when retrieving the phrase structure at the current time from the music structure word selected from the database STR1. Counter STR2D
P is used to retrieve the bar structure at the current time for the entry selected from the database STR2. RPM P is a word (address) pointer to the rhythm pattern database memory RPM. C
PM P is a word (address) pointer to the chord progression database CPM. RANM P is a word (address) pointer to the random number data memory RANM. MODE represents the mode of the automatic composer. The normal mode in which no melody is automatically generated is indicated by NORMAL, and the mode in which a melody is automatically generated is RMELODY.
, KEYON is a key-depression state flag. This flag KEYON indicates that the key-depression state is YES and the key-release state is N.
PKEYON, which is indicated by O, is a flag indicating the key pressing state at the immediately preceding timing, and the key pressing state is YES and the key releasing state is N.
Shown as O. USER MEL is a flag indicating whether or not the user's performance is within the bar. This flag US
ER MEL is used as a flag for setting a melody pattern rule expansion mode for adding a melody pattern by a user's melody performance to the melody pattern database in the automatic generation mode RMELODY (while automatic generation of melody is prohibited).

Outline of Operation of the Embodiment The automatic composer of the embodiment composes in real time, and performs the composition in parallel with the composition work in real time. In response to the generation start instruction from the input device, the operation mode of the automatic composer shifts to the automatic melody generation mode. In response to the generation start instruction, the automatic composer determines the structure of the music composition. This decision is initiated by retrieving the song structure word from the music structure database. Furthermore, the structure of the first phrase contained in the song structure word is selected as the structure at the start of generation, and the internal structure of the phrase (bar structure, substructure) suitable for the selected structure is retrieved from the substructure database and the first bar structure is extracted. Is selected as the first bar structure of the song. Furthermore, the automatic composer retrieves a chord progression suitable for the structure of the passage (upper structure) from the chord progression database and determines the first chord of the chord progression as the first chord of the song. Furthermore, the automatic composer retrieves from the rhythm pattern database a rhythm pattern that matches the bar structure (substructure) and that matches the specified rhythm from the input device and the specified beat. The extracted rhythm pattern has a length of one bar, and the sounding timing information and the mute timing information of the automatic melody sound in the one bar are written as a key-on pattern and a key-off pattern, respectively. The information at each music point is read from the rhythm pattern extracted as the music time progresses according to the specified tempo. The automatic composer determines the pitch of the melody tone when the read information indicates the sounding timing of the automatic melody tone. The automatic melody tone is determined as follows. The automatic composer takes random number data from the random number data memory and adds a previous melody tone to it to create pitch candidates for a new melody tone to be generated. Next, the automatic composer creates a melody pattern (defined by the tone type sequence NTM and the tone sequence MTM) up to the pitch candidate, and searches the melody pattern rule bases MPN1 and MPN2 for the melody pattern.
If the search fails, another pitch candidate is generated and the search is repeated. If the search is successful, the candidate at that time becomes the pitch of the new melody tone. The pitch data of the melody tone newly generated in this way is reproduced (played) as a sound through the sound source. When the timing information of the rhythm pattern at the present time indicates the silencing timing of the melody sound, the sounding melody sound is muted via the sound source. Since the rhythm pattern retrieved from the rhythm pattern database is one bar long, the composer retrieves an appropriate rhythm pattern suitable for the progress of music again from the rhythm pattern database every time one bar of music time elapses. That is, the specified rhythm from the rhythm pattern database,
The rhythm pattern that matches the specified beat and the new measure structure is extracted. The composer scans the chord progression retrieved from the chord progression database according to the current time from the rhythm counter. In this embodiment, the length of chord progression is the same as the length of the upper structure (sentence). When the chord progression being selected ends (when one passage ends), the automatic composer retrieves the next passage structure (superstructure) from the music structure word and retrieves the chord progression that matches the passage structure from the chord progression database. . The melody is automatically generated as described above. Note that it is easy to perform automatic accompaniment based on the chord progression extracted from the chord progression database. In the automatic composer of the present embodiment, when the user inputs a melody from the keyboard in the automatic melody generation mode, the melody can be patterned (ruled) and added to the melody pattern rule base as an additional rule. I can. This is called a melody pattern rule extension function. That is, when the first key depression occurs on the keyboard within one bar, the mode of the automatic composer is the melody rule extension mode (USER MEL = YES). The automatic composer evaluates the pitch and pitch of the user melody sound from the keyboard. The evaluated tone types and pitches are loaded into the tone sequence memory MTM and the tone sequence memory NTM by the right shift method, respectively. At the timing of the next bar line, the NTM and MTM store melody pattern information which is a rule of the melody of the user input during one bar. Therefore, the automatic composer writes the melody pattern information in NTM and MTM into the extended melody pattern rule base MPM2 to realize the extension of the melody pattern rule base. At the bar line timing, the melody pattern rule base expansion mode is automatically canceled and the melody is automatically generated, and the automatic generation mode is resumed.

Description of Flow Hereinafter, the embodiment will be described in more detail with reference to FIGS. Main Flow (FIG. 15) FIG. 1 shows the flow of the main routine executed by the CPU of FIG.
5 shows. First, the main routine initializes the system in step 15-1. Main loop 15-2 to 15-
A key scan is executed at entry 15-2 of 16 to read the states of the keyboard 8 and the input device 10. Subsequently, the required processing is executed corresponding to each operated key. That is, when the generation start instruction is given (step 15-3), the generation start processing 15-4 (FIG. 18) is executed and stopped. When there is an instruction (step 15-5), the stop processing 15-6 (see FIG. 2).
4) is executed, and when there is a key depression on the keyboard (step 1
5-7), the key depression process 15-8 (FIG. 25) is executed, and when the keyboard is released (step 15-9), the key release process 15-10 (FIG. 26) is executed and the input device is operated. When the rhythm switching is instructed from 10 (step 15-11), the rhythm switching 15-12 is executed to execute the rhythm type register RHY.
When the tempo setting is input from the input device 10 (15-13), the tempo setting 15-14 is executed to set the specified tempo in the tempo register tempo and other inputs are set. For (step 1
5-15) and other processing 15-16 is executed. Interrupt Routine (FIG. 16) FIG. 16 shows the flow of the interrupt routine. The interrupt routine is activated each time the lock oscillator 18 of FIG. 2 generates a signal indicating the passage of the music resolution time. First, in 16-1, it is determined whether MODE = NORMAL, that is, whether the mode is normal. If the mode is normal, it returns as it is, and if it is not normal (in the automatic melody mode), the following processing is performed. That is, in step 16-2, it is checked whether or not the key is being pressed, and if the key is being pressed, the key pressing process 16-3 (FIG. 27) is executed and then the process proceeds to step 16-9. If the key is not being pressed, step 16-
USER in 4 It is determined whether or not MEL = YES, that is, whether or not there is a melody input from the user at the current bar (whether the melody pattern rule base expansion mode is set) or not. If MEL = YES, step 16-
Go to 9, USER If MEL = YES holds,
Proceed to Step 16-5, and get B (* (RPM P +
1), Tmod MEAS, 1) = 1, that is, whether it is the sounding time of the automatic melody sound. If it is the sounding time of the automatic melody sound, processing 16-6 (FIG. 33)
Is executed and then the process proceeds to step 16-9. If it is not the pronunciation time, the process proceeds to step 16-7 and GetB (* (RPM P
+2), TmodMEAS, 1) = 1, that is, whether or not the silent time of the automatic melody sound is determined.
After executing 5), the process proceeds to step 16-9, and if it is not the mute time, the process immediately proceeds to step 16-9. Step 16
-9 Inc CP C, T PKEYON = KEY
When ON is executed, the chord progression counter and rhythm counter are updated, and the contents of the current key status register are copied to the immediately preceding key status register. Next, in step 16-10, it is checked whether the chord progression is in the middle, and if the chord progression is reached, the chord progression is executed (FIG. 19) and the chord progression generation processing (FIG. 21).
Step 16-12 to perform TmodM
Judging from EAS = 0, if it is the bar line time, step 1
6-13 to execute the substructure generation process (FIG. 20), the rhythm pattern generation process (FIG. 23), and the melody pattern DB extension (FIG. 36).

Initialization (FIG. 17) FIG. 17 shows the details of the initialization 15-11 of the main routine. 17-1 STR1 P = STR1, STR2 P
= STR2, RPM P = RPM, CPM P = CP
M, STR1D P = 0, STR2D P = 0, CPM
D P = 0, RANM P = RANM is executed to initialize various pointers, and RHY = ROCK, ME in 17-2.
AS = 16, TMP = 120, BEAT = * (TBTM
+ TMP), * MPM2 = f000H, KEY = C, P
REV Execute PIT = 24, and in 17-3 MODE = N
OMAL and KEYON = NO are executed and set, and finally, at 17-4, NTM = f000H, MTM = f000H.
To initialize the tone type and pitch data memory. Generation Start Processing (FIG. 18) 18 shows the details of the generation start processing routine. This routine is a routine performed when an input device generation start instruction is given. First, (18-1) generation of upper structure of music (FIG. 19) and generation of lower structure (FIG. 2) in order to select music structure.
0) is executed. Next, the chord progression generation process 18-2 (FIG. 22) is executed to select a chord progression that matches the upper structure from the chord progression database. Next, the rhythm pattern generation process 18-3 (FIG. 23) is executed to select from the rhythm pattern database a rhythm pattern that matches the substructure of the music, matches the specified rhythm, and matches the specified beat.
Next, at step 18-4, the rhythm counter is initialized by T = 0, at 18-5 the tone type memory is initialized by * NTM = f000H, and at step 18-6, * MTM = f000.
Initialize the pitch memory by H and MO at step 18-7.
The state flag is set to the generation mode by DE = RMELODY. Generation of Upper Structure (FIG. 19) FIG. 19 shows a detailed flow of the upper structure generation routine.
This routine is executed when there is a generation start instruction from the input device 10 or when the end of chord progression is reached. The purpose of the superstructure generation routine is to generate the superstructure of the music and set the substructure that matches the superstructure. The superstructure is generated by extracting the superstructure data from the superstructure database STR1. More specifically, in step 19-1, post = STR1D P
× 4 + 3, STR1 = GetB (* STR1 P, p
ost, 4) to execute superstructure database STR1
The upper structure (sentence structure) data STRD1 is extracted from. Subsequently, in 19-2 to 19-5 (19A), the next superstructure is located for the next superstructure generation routine. That is, STR1D at 19-2 Increment P, STR1D P = 4 (step 19-3) or * STR1D If P = END (step 19-4), STR1D P = 0, Increment STR1
P (step 19-5) is executed. Next from 19-6
In 19-10 (19B), the lower structure sequence that matches the upper structure extracted in 19-1 is located. Here, individual substructures are extracted from the located substructure sequence (see FIG. 20). In detail, step 19
-6 at STR2 P = STR2 Execute P + 3, and as a result * STR2 P = ffffH (step 19-7)
If is satisfied, STR2 P = STR2 (step 19
-8) is executed, and GetB (* S
TR2 Check whether P, STRD1,1) = 1 holds. GetB (* STR2 P, STRD1,
If 1) = 1 holds, STR2D Execute P = 0 (step 19-10). As shown in FIG. 11, whether or not the eight lower structure columns (8-bar structure) entered in the lower structure database STR2 are in the selected upper structure, the attribute data of the lower structure entry is selected and the upper structure data STRD1 (for example, It is determined by comparing with AA).

[0022]Substructure generation (Fig. 20) FIG. 20 shows a detailed flow of the lower structure generation routine. This
Is the first step 18-1 of the generation start process.
It is called in the following structure generation routine.
Also, when the current time is the bar line time, the interrupt routine
Called in step 16-12 of
It The purpose of the substructure generation routine is to create new substructure data.
Data (new bar structure data). In detail
To be more specific, in step 20-1, post = (STR2D
P × 4 + 3) mod16, STRD2 = GetB (*
(STR2 P + STR2 P / 4 + 1), post,
4) is executed to obtain the substructure. 20-2 to 20-
4 (20A), the next implementation of the substructure generation routine
Locates the following substructure for the row. That is,
20-2 Lower structure element counter STR2D P
Increment (pointer to the bar structure within the 8 bar section)
STR2D P = 8 (step 20-3) is established
STR2D Execute P = 0 (step 20-4)
is doing.GetB (Fig. 21)  FIG. 21 is a detailed flow of the function instruction GetB. function
The instruction GetB (data, post, nbit) is 1
Function that obtains the desired partial data item in the code. Immediately
GetB (data, post, nbit) is 16
1 word of bit To the right from the post bit of data
It is a function instruction that takes n-bit data.
Various routines such as step 19-1 of the position structure generation routine
It is called and executed as appropriate. First of all,
In step 21-1, x1 = data is executed, and step 21-
2 shifts X1 to the right (post + 1-nbit),
In step 21-3, x2 = ffffh is executed, and 21−
In step 4, shift X2 to the left by nbit, and in step 21-5
Invert X2, and set bits X1 and X2 in step 21-6.
Take the logical product of each. In the operation example of FIG.
2 bits to the right of the 8th bit of 1 word data
Taking out (01). GetB function instruction execution
As a result, the 2 bits of this 01 are the first bits of the 16-bit word.
And the 0th (least significant) bit position.Chord progression generation routine (Fig. 22) The details of the chord progression generation routine are shown in FIG. This le
Routine is step 18-2 of the generation start processing, or one
Each time the chord progression of
Be extruded. The chord progression generation routine
The specified rhythm type from the database bass memory CPM
The chord progression that matches the higher-level structure is extracted. In detail
In other words, in Step 22-1, GetB (* CPM
Check the P, RHY, 1) and access the code
Performs an attribute test whether the line is in the specified rhythm type
In this attribute test, GetB in step 22-2
((* (CPM P + 1), STR D1,1) = 1
To check if the chord progression is in a higher level structure.
Making a decision. The attribute text of either 22-1 or 22-2
If the strike fails, in 22-3 to 22-6
Chord progression database memory CPM to next chord progression
You are locating a row. That is, the chord progression data is set at 22-3.
Data memory word pointer CPM Increment P
22-4 * CPM P = ffffH (Cord progression data
Database end), step 2
2-6 in * (CPM P-1) = 0H (chord progression en
Check if it is the beginning of the tree), * (CPM P
If -1) = 0H is not established, the process returns to 22-3, and at 22-4
* CPM Pointer CP if P = ffffH holds
M Return P to the top CPM of the chord progression data memory
Return to step 22-1, and at step 22-6, * (CP
M If P-1) = 0H holds, the same step 22-
Return to 1. Attribute text for both steps 22-1 and 22-2
Pointer CPM when passing strike P is a proper code
It is locating the progress. Therefore, in step 22-7
CP C = 0 (The code pointer is the first code in the chord progression.
Set to point to the card).

[0023]Rhythm pattern generation routine (Fig. 23) The detailed flow of the rhythm pattern generation routine is shown in FIG.
You The rhythm pattern generation routine is
Step 18-3, Step 16-1 for bar line time
Called in 3. Rhythm pattern generation routine
Is the purpose in the rhythm pattern database memory RPM?
Match the specified rhythm type, match the lower structure, and tempo
Rhythm pattern (1 bar rhythm pattern)
It is to take out. The extracted rhythm pattern
Is a rhythm pattern of a one-measure melody that is automatically generated
(Sound length sequence) is defined. In detail,
Get B (* RPM P, RHY, 1)
Rhythm pattern accessed by seeing whether
We are investigating whether the turn is in the specified rhythm type. Su
In Step 23-2, GetB (* (RPM P + 1),
By checking STR D2,1)
I am investigating whether the turn fits the substructure. 23-
In 3 and 23-4 (23A), the rhythm pattern becomes tempo
I am investigating whether or not it corresponds to the corresponding rhythm type. That is,
23-3 with data = * (RPM P + 1), post
= * (TBTM + TMP) and execute Get at 23-4
Whether B (data, 15,4) = post holds
I will check. 23-1, 23-2, 23A
If any attribute test fails, 23B (23-5
23-7), the following rhythm pattern database
The rhythm pattern is located. That is, in 23-5
RPM P = RPM Execute P + 4 and 23RPM * RPM
P = ffffH is established and the rhythm pattern database
When the end of the space is detected, the RPM is 23-7. P = RP
Execute M to perform rhythm pattern pointer RPM Liz P
It is returned to the first RPM of the pattern database. all
Passed all attribute tests (23-1, 23-2, 23A)
If you do, go to step 23-8 MEL =
Execute NO to expand the melody pattern rule database
Release the tension mode.Stop processing routine (Fig. 24) FIG. 24 shows the stop processing performed in response to the stop instruction 15-5.
It is the details of reason 15-6. MOD as shown in 24-1
Execute E = NORMAL to change the system status to normal mode.
Mode (normal state where melody is not automatically generated)
Have returned to. Key depression processing routine (FIG. 25) Of the key depression processing 15-8 executed in response to the key depression 15-7.
Details are shown in FIG. 25-1 with KEYON = YES
Execute to set the key depression flag, and at 25-2, KEYBUF =
Execute KC, PIT = KC and pronounce PIT at 25-3
It In this way, the pronunciation process of the sound source 12 for the key depression of the keyboard 8
The reason is step 1 in the main routine (FIG. 15).
Performed within 5-8.

Key Release Processing Routine (FIG. 26) FIG. 26 shows the details of the key release processing step 15-10 performed for the key release 15-9 on the keyboard 8. 26-1 K
EYON = NO is executed to set the key depression flag to the key release state, and the PIT is muted at 26-2. Processing routine during key depression (FIG. 27) FIG. 27 shows the details of the processing routine during key depression. This routine is a routine that is called when 16-2 during key depression (KEYON = YES) is detected in the interrupt routine (FIG. 16). In the processing routine during key depression, the melody pattern rule-based extension mode is set by the first key depression in the measure as a signal and the user input melody is patterned in the extension mode (work of creating a tone sequence and a tone sequence). More specifically, in 27-1 MODE
= NORMAL is established, immediately jump to 27-12 and PREV Perform PIT = PIT. MODE
= NORMAL (step 27-1) is not established,
That is, when the mode is the generation mode (RMELODY), the routine proceeds to step 27-2, where it is determined whether PKEYON = OFF, that is, whether a new key depression has occurred on the keyboard 8. If the key is continuously pressed, the process jumps to step 27-12.
When a new key depression occurs, the process proceeds to step 27-3 and USE
R It is checked whether or not MEL = YES, that is, whether or not it is already in the extension mode. If it is already in the extended mode, jump to step 27-7. If it is not in the extended mode, proceed to step 27-4 and USER MEL = YES is executed and the fact that there is a melody input from the user during the measure is recorded. Next, at 27-5, * NTM = f000
H, * MTM = f000H is executed to initialize the memory of the tone type and the pitch sequence. Subsequently, a mute command is executed at 27-6 to mute the automatically generated melody sound being sounded. 27-3
27-6 define the extended mode setting process 27A. 27
At -7, the current chord information is obtained by creating chord information (FIG. 28), and at 27-8, the sound type is classified (FIG. 29) to classify the sound type of the melody sound that is pressed. The results classified in 27-9 are stored (sound type store in FIG. 30).
27-10 executes the pitch classification (FIG. 31) (classifies the pitch from the preceding note of the melody sound applied to the key depression, and the result is 2
In step 7-11, it is stored in the pitch memory MTM (pitch store in FIG. 32). After that, proceed to 27-12 and PREV
Execute PIT = PIT to move the contents of the current pitch register to the previous pitch register.

Code Information Creation Routine (FIG. 28) FIG. 28 shows a detailed flow of the code information creation routine.
This routine is step 2 of the processing routine (FIG. 27) during key depression in order to pattern the melody input by the user.
In addition to being called in step 7-7, it is called in step 33-6 of the processing routine (FIG. 33) of the later-described sounding time for automatic melody generation. The purpose of the chord information creation routine is to retrieve the chord information at the current time from the chord progression selected from the chord progression database. More specifically, the code length accumulator is initialized by i = 0 at 28-1 and j = at 28-2.
CPM The start code of the selected code progress data is located by P + 2. Next, 28A (28-3 to 28-5)
At, the current code (code at the current time) is located. That is, in 28-3, i = i + GetB (* j,
5 and 6) is executed, and i> CP at 28-4 It is checked whether C or not, and if not satisfied, J is incremented at 28-5. After locating the current code, the process proceeds to step 28-6 and the data of the current code is fetched into the CHO register by CHO = * j. Then at 28-7, CHO (ROOT) =
(GetB (CHO, 15,4) + KEY) mod1
2, CHO (TYPE) = GetB (CHO, 11,
6) Obtain the root and type information of the current code by executing 6). Sound Type Classification Routine (FIG. 29) FIG. 29 shows details of the sound type classification routine. This routine is step 2 for patterning the user-entered melody.
It is called in step 7-8 and is called in step 33-7 of the processing routine of the sounding time (FIG. 33) which will be described later in order to generate an automatic melody. The purpose of the note type classification routine is to classify the note type of the melody sound of interest (a melody sound on a key depression or a sound candidate for an automatic melody sound). The chord information from the chord information creation routine (FIG. 28) for classifying the tone type, the key information KEY designated rhythm type information RHY, the chord tone scale note, and the standard pitch class set of the tension note are used. More specifically, in step 29-1, p
os1 = (12 + PIT-CHO (ROOT)) mod
12, pos2 = (12 + PIT-KEY) mod12
To execute. Here, POS1 represents the pitch from the chord root of the pitch PIT, and POS2 represents the pitch from the key of the pitch PIT. Next, at 29-2, x1 = * (CT + CH
O (TYPE)), x2 = * (TN + CHO (TYPE)
E)), x3 = * (SN + RHY) to obtain each pitch class set (PCS) of chord, tension and scale. Next, at 29-3, GetB (x1, pos1,1)
Check if = 1 (chord tone), and 2 if true
9-4 executes NT = CHOT NT = CHOT declares that the melody sound having the pitch PIT is a chord tone. GetB in step 29-5
(X2, pos1,1) = 1 andGetB (x3, p
os2,1) = 1 is established, that is, whether it is an available note or not, and if it is established, 29-6 is NT.
= Perform AVAI. NT = AVAI declares that the melody sound of interest is an available note. In Step 29-7, GetB (x3, p
It is checked if the note of interest is a scale note by os2,1) = 1, and if satisfied, NT = SCAL is executed at 29-8 to declare that. Step two
In 9-9, GetB (x2, pos1,1) = 1 is used to check whether the melody sound is a tension note,
If yes, 29 = NT to declare that
Run TENS. 29-3, 29-5, 29-7,
If none of 29-9 is satisfied, NT = 29-11
AVOI declares that the melody sound is an avoid note. In the operation example of reference numeral 290, the code is D
In MAJOR, the PIT sound of F # 3 is classified as a chord tone. Ben As shown in FIG. 291, circle X1 is a code tone PCS, circle X2 is a tension note PCS, and circle X3 is a scale note PCS.
Is. The melody sound determined to be an element of X1 is a chord tone. The portion where the sets X2 and X3 overlap is determined as an available note. Set X of set X3
A region that does not overlap with 1 and does not overlap with the tension note is an area determined as a scale note. A portion of the set X2 that does not overlap the set X3 is an area determined as a tension note. The area outside the gathering circles X1, X2, and X3 is an area determined as an void note.

Sound Type Store Routine (FIG. 30) FIG. 30 shows the details of the sound type store routine. This routine patternizes the user-entered melody (step 27).
-8) and the process for evaluating the automatic melody sound (in step 33-8). In the sound type store routine, the sound type memory NTM is used as the right shift register to store the sound type classification NT in the NTM, that is, 30-1 is NT.
M is right-shifted by 4 bits, NT is left-shifted by 12 bits at 30-2, and the logical sum of NT and NTM is assigned to NTM at 30-3. Pitch Classification Routine (FIG. 31) FIG. 31 shows the details of the pitch classification routine. The pitch classification routine is called in steps 27-1 and 33-7.
In the pitch classification routine, the current pitch PIT is changed to the previous pitch PRE.
V The pitch (motion) formed between both tones is classified as compared with PIT. That is, PIT = PREV PI
If T (step 31-1), MT = SAME (step 31-2) is declared and no motion is declared, and PIT-PR
EV If PIT> 2 (step 31-3), MT = + J
The UMP (step 31-4) is used to declare the upward jump and PREV PIT-PIT> 2 (Step 31-
If 5), MT = -JUMP (step 31-6) is used to declare the downward jumping progress, and PIT-PREV is declared. PIT>
If 0 (step 31-7), MT = + STEP (step 31-8) is declared as upward sequential progress, and PREV
If PIT-PIT> 0 (step 31-9), MT =
-STEP (step 31-10) declares downward sequential operation. Pitch Store Routine (FIG. 32) FIG. 32 shows the details of the pitch store routine. This routine is called in step 27-10 (melody pattern rule base expansion system) and step 33-8 (automatic melody tone generation system). The pitch store routine operates the pitch string memory MTM as a right shift register to store the pitch data NT which is the classification result in the NTM. Ie 3
At 1-1, the NTM is shifted to the right by 4 bits, at 31-2, the NT is shifted to the left by 12 bits, and at 31-3, the logical sum of NT and NTM is assigned to NTM.

Sound Generation Time Processing Routine (FIG. 33) FIG. 33 shows the details of the sound generation time processing routine. This routine is a routine that is executed at the time when the automatic melody tone is generated (16-5). That is, this routine is called when the current time is the timing of bit "1" in the key-on pattern of the rhythm pattern. The purpose of the processing routine for the pronunciation time is to determine the pitch of the melody tone and generate it. For this reason, in the processing routine of the pronunciation time, the random number from the random number memory RANM is added to the pitch of the previous melody tone to create a pitch candidate of the current melody tone, and the melody pattern up to the candidate is checked by the melody pattern rule base. If the rule base has an entry that matches the pattern up to the current pitch candidate, the current pitch candidate is determined as the pitch of the current pitch. If there is no corresponding entry in the melody pattern rule base, another pitch candidate is created and the inspection is repeated by the rule base. In detail,
In step 33-1, the pitch type memories NTM and MTN are right-shifted by 4 bits. 33-2 generates a pitch candidate random Markov. That is, the random number from the random number memory * RANM
P is the pitch of the previous sound PREV The PIT is added to generate a current sound candidate. Next, in 33A (33-3 to 33-5), the next random number is located for the next routine execution. That is, in 33-3, the random number pointer RANM Increment P and * RANM at 33-4 RANM when the end of the random number memory is detected by P = fffH P =
The random number pointer is returned to the head of the random number memory by RANM (step 33-5). In 33-6, the code information creation routine is called. Inlet 3 of loops 33-7 to 33-12
In 3-7, the note type classification routine (FIG. 29) and the note interval classification routine (FIG. 31) are called to classify the note type and note interval of the pitch candidate pit. 33-8, the tone type store routine (FIG. 30) and the tone pitch store routine (FIG. 32) are called, and the tone type and the tone classification result are respectively recorded in the tone type memory NT.
M, the pitch sequence memory MTM is loaded as the nibble at the right end. In step 33-9, the evaluation routine (FIG. 34) is called to check whether the melody pattern up to the current pitch candidate PIT defined by NTM and MTM is in the melody pattern rule base. If it is not entered in the rule base, it becomes NG and 33B (33-10).
33-12), the next pitch candidate is generated. That is, N is incremented at 33-10 and Z is incremented at 33-12.
= -1 × Z is executed. Then, the process returns to step 33-7, and the process is repeated for the pitch candidate generated in 33B. 33B sequentially generates pitch candidates such as the first pitch candidate ± 1, ± 2, ± 3 obtained in 33-2 each time (here, +1 is a semitone, -1 is a semitone). Lower, +2 is 2 semitones up, -2 is 2 semitones down ...). If the evaluation routine 33-9 finds an entry matching the melody pattern up to the pitch candidate in the rule base, G
Become OOD, PREV PIT = PIT (step 3
3-13) is executed and KEYON = YES in 33-14.
The key-on flag is set to ON and the determined pitch pit is sounded. In this way, when there is a key-on signal from the key-on pattern in the automatic melody generation mode, a melody sound that complies with the rule of the melody pattern rule bass is determined and sounded.

Evaluation Routine (FIG. 34) FIG. 34 shows the details of the evaluation routine called in step 33-9 of FIG. The purpose of the evaluation routine is the tone sequence N
It is to determine whether the melody pattern defined by TM and the pitch sequence MTM follows the melody pattern rule (determines whether the melody pattern matches the rule entered in the melody pattern rule base). Here, the melody pattern rule base is a fixed melody pattern rule base MPM1 and RAM placed in the ROM4.
Extended melody pattern rule base MP formed in 6
There is M2. The evaluation routine searches both routines for a rule that matches the NTM and MTM patterns. 34A (34-1 to 34-4) is a fixed melody pattern rule-based search, and 34B (34-5).
34-8) is a search for the extended melody pattern rule base. In 34-1, the head of the fixed melody pattern rule base is located by i = MPM1 and the loop 34
At the entrance of -2 to 34-4, * i = NTMand * (i +
1) = MTM (step 34-2), it is checked whether the tone type sequence and the tone sequence of the rule accessed correspond to NPM and MPM, respectively. I if they do not match
= I + 2 (step 34-3) to locate the next rule, and in step 34-4 the end of the fixed melody pattern rule base (GetB (* i, 15,4) = END)
The process from 34-2 onward is repeated until is detected.
In step 34-2, (* i = NTMand * (i + 1)
= MTM) is satisfied, GOOD is returned. When the end of the fixed melody pattern rule base is detected at 34-3, the start of the extended melody pattern rule base is located by i = MPM2 at 34-5 and loops 34-6 to 34-34 are executed. −
It is checked whether or not the tone type sequence and the tone sequence of the rule accessed at the entrance (34-6) of 8 correspond to NTM and MTM, respectively. If they do not match, i = i + 2 (step 34-
Locating the next rule according to 7), step 34-8
End of extended melody pattern rule base (GetB
If (* i, 15,4) = END) is not detected, 34
Return to -6. If the condition of 34-6 is satisfied, GOOD is returned. At 34-8, NG is returned when the end of the extended melody pattern rule base is reached. Mute time processing routine (FIG. 35) The details of the mute time processing routine called in step 16-8 at the time of mute of the automatic melody sound (the time when the bit "1" representing the key-off is given from the key-off pattern) is described. It shows in FIG. If KEYON = YES (step 35-1), the sound PIT is muted because the sound is being generated and the key-on flag is set to KEYON = NO (35-
2). 36. Melody pattern DB expansion routine (FIG. 36) FIG. 36 shows details of the melody pattern database expansion routine called in step 16-13 at the bar line time. The purpose of this routine is to add the melody pattern input by the user (the melody pattern input during one bar) to the melody pattern rule base MPM2 of the RAM 6. In detail, USER MEL
= YES (step 36-1) is not satisfied, there is no melody input from the user during one bar, so the process returns as it is. USER MEL = YES (36-1)
When is satisfied, the end of the extended melody pattern rule base MPM2 is detected at 36A (36-2 to 36-7). That is, the pointer is located at the beginning of the extended melody pattern rule base by i = MPM2 (36-2), and if * i = ffffH (36-3) is not established at the entrance of the loop, i is incremented (36-6) and 36 −
Memory over at 7 (i> MPM2 + MPM2SIZ
E), check * i = ffffH (36
-3) holds, * i = * NTM, * (i + 1) = *
MTM, * (i + 2) = ffffH (step 36-
4) is executed to write the user melody pattern in the melody pattern database MPM2 * NTM = f0
00H, * MTM = f000H (step 36-5) to re-initialize the tone type and pitch sequence memory.

Pattern data format adjustment (see FIG. 3)
7 to 39) The flow of FIGS. 37 to 39 relates to the format adjustment between the NTM and MTM and the melody pattern rule bases MPM1 and MPM2. The routine of FIG. 37 is the first step (34 of FIG. 34) of the evaluation routine (FIG. 34).
-1) and the melody pattern rule base extension routine (FIG. 36) are called in step 36-4 (see FIG. 39 which is a detailed flow of step 36-4). The routine of FIG. 37 is for matching the format of the melody pattern input or evaluated by NTM and MTM with the format of the rules of the rule bases MPM1 and MPM2. In the case of the embodiment, the MTM has only one extra pitch data item from the past melody tone type discarded on the NTM by the input of the evaluation routine or the input of the melody pattern rule base extension routine. In order to match this with the pitch sequence format of the rule-based rule, it is necessary to convert this extra pitch data item (nibble) into an END nibble. The routine of FIG. 37 performs this processing. In the figure, the symbol "∨" represents the bitwise logical sum, and "∧" represents the bitwise logical product. The routine of FIG. 38 is the evaluation of steps 34-2 and 34-6 of the evaluation routine (FIG. 34). In this routine (FIG. 38), even if not the entire melody pattern indicated by the rules from the rule bases MPM1 and MPM2,
The partial pattern is the melody pattern (NT
If it agrees with M and MTM), the melody pattern to be evaluated is processed according to the rule (returns YES) (this is effective in saving the number of rules in the rule base). is there). FIG. 39 shows details of step 36-4 of the melody pattern database expansion routine. The above description, the description of FIGS. 37 to 39 itself,
37 to 3 from the description of other drawings and the description in the specification.
Since the details of the routine of No. 9 are clear, further description will be omitted.

[0030]

[Modification] Although the description of the embodiment is completed above, various modifications and changes can be made within the scope of the present invention. For example, the melody pattern rule base 216 may have a melody pattern (MP) rule base for each music style. FIG. 40 shows a melody pattern rule base for each music style and its related configuration. The melody pattern rule base has a rule base for each of a plurality (three in FIG. 40) of music styles. In FIG. 40, 216A is a style number. 1-No. 3 represents a MP rule group common to all styles (which can be used in any style), and 216B is a style number. 1 and No. 2 represents a common MP rule group, and 216C is a style number. 1 represents the MP rule group unique to 1
6D is style No. 2 represents the MP rule group unique to the item 2. Style No. There is no MP rule group specific to 3). Therefore, the style No. The melody pattern rule base of 1 is 216A, 216B, and 216
Style No. The melody pattern rule base of No. 2 is defined by 216A, 216B, and 216D, and the style No. The melody pattern rule base of 3 is defined by 216A. In the operation of the automatic composer, the selection module 230 creates a selection MP rule base 232 for the designated music style (selects from the rule base 216) in accordance with the musical style input (for example, the designated rhythm 131 in FIG. 1). The selection MP rule base 232 is the melody pitch string generation device 200 of FIG. 1B.
Is accessed by an evaluation module, such as Matching 214. By using the configuration as shown in FIG. 40, the automatic composer can more efficiently generate a melody that matches the musical style. It is also easy to speed up data retrieval from the database to support full real-time response of composition. 41 and 4 for an example.
2 shows. FIG. 41 shows a modified example 400 of the music material database and its search method. In FIG. 41, the database of music materials (for example, rhythm pattern, chord progression) includes an index table 403 and a material database body 405. As a composition condition, as shown by 401, it is assumed that the first attribute (for example, music structure) is “α” and the second attribute (for example, musical style) is “β” (the number of attribute items is not limited to two. For convenience of illustration, the number of attribute items is 2.) It is assumed that there are M types of first attributes and N types of second attributes. The index table 403 gives index information to the material database main body 405, and for each composition condition (combination of attributes), the storage location of the material that is placed in the material database main body 405 and matches the composition condition (start address ) And the number of entries for that material. In operation, from composition condition 4-1 to block 4
02, INDEX + (N × α + β) × 2 is calculated, the index table 403 is addressed, and the address X to the material database body 405 written in the index table 403 (for example, the first attribute is “1” 2 The head address X1) of the material entry group having the attribute of "1" and the number of entries S (for example, S1) written at the next address are read. Next, as shown at 411 in the search module 410, 0
Generate a random number RAN of ~ 1, and generate address X and number of entries S
And the number of words / entry in the database main body 405, for example, 3 is used, 412 to 414, (RA
N * S) * 3 + X is calculated to generate the address ADDR of the music material entry to be searched. This address ADD
R (and word / number of entries / continuous subsequent addresses)
By accessing the music material database main body 405 with, it is possible to search the database for a desired music material, that is, a music material satisfying the composition condition 401, and generate it as a part of composition.

According to the configuration shown in FIG. 41, desired data retrieval with respect to the music material database 405 can be performed very quickly. However, the database body 405 contains duplicated data, and the memory efficiency is not good. FIG. 42 shows another modification 500 of the music material database and its search method. In this modified example 500, the music material database has first and second index tables 503, 50.
4 and a database body 505. In this case, the data does not overlap on the database body 405. The second index table 50 is stored in the first index table 503.
The index (address) information for No. 4 is written. The first index table 503 can be accessed immediately from the composition condition (first attribute = α, second attribute = β).
That is, as shown by 502, the table 503 can be immediately addressed by the calculation of INDEX = 1 (start address of the first index table 503) + (N × α + β). As indicated by 511, the first index table 503.
The second index table 504 is accessed with the data X read from. In the second index table 504, the number of material entries S in the database main body 505 (for example, S1 for conditions 1 and 1) and the address list of each material entry are written as composition conditions. Therefore, 51
As shown in FIG. 2, the (RAN × S) th item (where RAN is a random number from 0 to 1) in the address list is read, and by accessing the material database body 505, the material that meets the desired composition condition 401 is immediately displayed. You can take it out. According to the configuration of FIG. 42, the database main body 5
It is possible to quickly generate a music material (for example, melody rhythm, chord progression) that meets the set composition condition while avoiding data duplication in 05. In addition, various modifications and applications are possible.

[0032]

As described above in detail, according to the present invention, it is possible to adapt to music progress through devising musical knowledge expression (use of melody pattern rule base), utilizing music progress, melody generation method, etc. Moreover, a good melody supported by music knowledge can be composed in real time or in an environment close to real time.

[Brief description of drawings]

FIG. 1A is a functional block diagram of a composition conditioner incorporated in an automatic composer according to the present invention.

FIG. 1B is a functional block diagram of a real-time melody pitch string generation device incorporated in an automatic composer.

FIG. 1C is a functional block diagram of a melody pattern rule-based expansion device incorporated in an automatic composer.

FIG. 2 is a block diagram of typical hardware that realizes an automatic composer.

3 is a functional block diagram of an automatic melody generator incorporated in the automatic composer of FIG.

FIG. 4 is a diagram showing a character (symbol) expression and a numerical expression of a music element used in the embodiment.

FIG. 5 is a diagram showing character and numerical expressions of still another music element.

FIG. 6 is a diagram showing character and numerical expressions of still another music element.

FIG. 7 is a diagram showing a standard pitch class set memory.

FIG. 8 is a diagram showing a fixed melody pattern database memory and a tone type / pitch data memory.

FIG. 9 is a diagram showing a tempo / bit conversion map and a random number memory.

FIG. 10 shows a chord progression database memory.

FIG. 11 is a diagram showing a music structure database memory.

FIG. 12 is a view showing a rhythm pattern database memory.

FIG. 13 is a diagram illustrating other constants and variables.

FIG. 14 is a diagram illustrating still another variable.

15 is a flowchart of a main routine executed by the CPU of FIG.

16 is a flowchart of an interrupt routine executed by the CPU of FIG.

FIG. 17 is a detailed flowchart of initialization.

FIG. 18 is a flowchart of a generation start processing routine.

FIG. 19 is a detailed flowchart of an upper structure generation routine.

FIG. 20 is a detailed flowchart of a lower structure generation routine.

FIG. 21 is a diagram showing a detailed flowchart of GetB and an operation example.

FIG. 22 is a detailed flowchart of a chord progression generation routine.

FIG. 23 is a detailed flowchart of a rhythm pattern generation routine.

FIG. 24 is a flowchart of stop processing.

FIG. 25 is a flowchart of key depression processing.

FIG. 26 is a flowchart of key release processing.

FIG. 27 is a flowchart of processing during key depression.

FIG. 28 is a detailed flowchart of a code information creation routine.

FIG. 29 is a detailed flowchart of sound type classification.

FIG. 30 is a detailed flowchart of the sound type store.

FIG. 31 is a detailed flowchart of pitch classification.

FIG. 32 is a detailed flowchart of pitch store.

FIG. 33 is a detailed flowchart of processing of pronunciation time.

FIG. 34 is a detailed flowchart of an evaluation routine.

FIG. 35 is a flowchart of processing of a muffling time.

FIG. 36 is a detailed flowchart of a melody pattern database expansion routine.

FIG. 37 is a detailed flowchart of MTM format change.

FIG. 38 is a detailed flowchart of steps 34-2 and 34-6.

FIG. 39 is a detailed flowchart of step 36-4.

FIG. 40 is a view showing a configuration related to a melody pattern rule base for each music style.

FIG. 41 is a diagram showing a modified example of the music material database and its search method.

FIG. 42 is a diagram showing still another modification of the music material database and its search method.

[Explanation of symbols]

200 Melody Pitch Sequence Generator 216 Melody Pattern Rule Base (Melody Pattern Rule Base Means) 132 Specified Beat or Tempo (Tempo Designating Means) 228 Real Time Performance System (Real Time Melody Performance Means) 302 User Input Melody (User Melody Input Means) 310 melody pattern (tone type / tone sequence) generation block (melody pattern recognition means) 330E melody pattern rule base extension unit 208 tone type / tone sequence generation module (melody pattern storage means, tone / tone type classification means, evaluation target melody pattern) Forming means) 214 Matching module (rule-based search means) 220 Next candidate generation module (another candidate generation means) 208, 214, 218, 220 (repeating means) 224 Determined current pitch (pitch determiner) ) 110,116,117,120,140,145,1
60 (chord progression generation means) 210 current tonality (tonality indication means)

Claims (6)

[Claims] 1. A music progression giving means for giving a music progression, a melody pattern rule base means for storing a rule base of a melody pattern in which a tone series of a melody is patterned by a tone series and a tone series, and the music progression means. And a melody generating means adapted to generate a melody that conforms to the progress of music from and which satisfies the melody pattern rule in the melody pattern rule base means. 2. The automatic composer according to claim 1, wherein the automatic composer further comprises tempo designating means for designating a performance tempo, and the melody creating means follows the performance tempo from the tempo designating means in real time. The automatic composer further comprises real-time melody playing means for playing the melody created by the real-time melody creating means as a sound in real time. 3. The automatic composer according to claim 1, wherein a user melody input means for inputting a melody from a user and a melody inputted by the user melody input means are subjected to pattern recognition in accordance with the progress of the music, and a tone type sequence is provided. A melody pattern recognition means for forming a melody pattern represented by a pitch sequence and a melody pattern for extending the melody pattern rule base by adding the melody pattern from the melody pattern recognition means as an additional rule to the melody pattern rule base means. An automatic composer, further comprising: a pattern rule base expanding unit. 4. The automatic composer according to claim 1, wherein the melody generating means sequentially generates melody tones, so that a melody pattern up to the preceding melody is stored by a tone sequence and a tone type sequence. Pattern storage means, pitch candidate generation means for newly generating a first pitch candidate of the current melody tone to be generated, pitch and pitch of the first pitch candidate, and pitch of the previous melody tone. And the current situation of the music progression, a pitch / tone type classifying means, and the melody pattern storage means is updated by using the pitch and tone type of the classified first pitch candidate, The evaluation target melody pattern forming means for forming a melody pattern up to a melody sound candidate as a search target, and the melody pattern rule base procedure described above for the melody pattern formed as a search target. A rule-based search means for searching, another candidate generation means for generating another pitch candidate for the current melody sound when the search fails, and the pitch / tone classification for the other pitch candidate. means,
Repeating means for repeating the operations of the evaluation target melody pattern forming means and the rule-based searching means, and a pitch determining means for determining a pitch candidate involved in the search as the pitch of the current melody sound when the search is successful. An automatic composer characterized by having: 5. The automatic musical composition apparatus according to claim 1, wherein the music progression imparting means includes chord progression generating means for producing chord progressions, and tonality instructing means for instructing tonality. Automatic composer that does. 6. A music progression giving means for giving a music progression, a melody pattern rule base means for storing a rule base of a melody pattern obtained by patternizing a tone series of a melody with a tone type sequence and a tone sequence, and a melody to be generated. Sound string candidate generating means for generating the sound string candidates and pattern recognition of the sound string candidates from the sound string candidate generating means based on the music progression, and a melody pattern expressed by a sound type string and a pitch string. A melody pattern forming means for forming a melody pattern, a rule base searching means for searching the melody pattern rule base means for the melody pattern from the melody pattern forming means, and a melody pattern rule base until the search is successful. Until the rule of the melody pattern that matches the search target is found in the means, Repeat means for repeating the operations of the means, the melody pattern forming means, and the rule-based search means while changing the sound string candidates, and generating a sound string candidate relating to success when the search is successful, the sound string of the melody An automatic composer comprising: a determining unit that determines as.