JP2008145564A - Automatic music arranging device and automatic music arranging program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To arrange a musical piece without any sense of musical incompatibility according to the playing level of a player. <P>SOLUTION: A music arrangement processing unit 14 specifies a note to be processed and notes as chord constituting sounds to be generated on the same track with the note by reference to sounding start time in a record of a musical performance information file 24 and a record of a note to be generated next. When the number of chord constituent sounds of a high-pitch side track exceeds a predetermined threshold, a music arrangement processing unit 14 deletes excessive chord constituent sounds beyond the threshold from lower-pitched sounds among the chord constituent sounds. When the number of chord constituent sounds of a low-pitch side track exceeds a predetermined threshold, the music arrangement processing unit 14 deletes excessive chord constituent sounds beyond the threshold from higher-pitch sounds among the chord constituent sounds. Thus, an arranged performance information file like the one from which records of the deleted chord constituent sounds are deleted is generated and stored in a storage device 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automatic arrangement apparatus and an arrangement program that arrange music according to a performance level of a performer.

There has been proposed a system that generates data of other parts such as accompaniment that matches the melody based on melody and chord data input in advance and stored in a storage device or the like (Patent Document 1). In the apparatus disclosed in Patent Document 1, a pattern sequence having a plurality of parts together with a melody is generated, and the pitch is corrected based on a prohibition rule regarding the pitch between parts.
JP-A-7-219526 JP 2001-272976 A

  When there is a music piece that the performer wants to perform, the arrangement of the music piece or the arrangement automatically added to the melody of the music piece may be difficult to perform at the technical level of the performer.

  Therefore, for example, in Patent Document 2, song data arranged in a different manner for each song is prepared, and song data arranged according to the technical level of the performer is selected and presented to the user. A system is disclosed.

  However, in the technique disclosed in Patent Document 2, it is necessary to prepare a plurality of pieces of music data of different technical levels for a certain piece of music and store the music data in a storage device. Therefore, there is a problem that it is not possible to provide song data according to the level for a song in which other parts such as accompaniment are added to the melody later as disclosed in Patent Document 1. .

  An object of the present invention is to provide an automatic arrangement device and an arrangement program that can arrange music in accordance with the performance level of the performer without musical discomfort.

An object of the present invention is to provide a storage means for storing performance information files each including a note record having a pitch indicating a tone to be pronounced, a pronunciation start time, and a pointer indicating a record of the note to be pronounced next. ,
In the performance information file, with reference to the sound generation start time and the record of the note to be sounded next, a chord constituent sound specification that specifies a note to be processed and a note to be a chord constituent sound generated simultaneously with the note Means and
If the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds corresponding to the chord constituent sounds that have exceeded the threshold value are deleted from those with low pitches, and the deleted chords are deleted. Arrangement means having arrangement performance information file generation means for generating an arrangement performance information file which is a new performance information file from which the record of the constituent sound has been deleted and stores the generated arrangement performance information file in the storage means When,
It is achieved by an automatic arrangement device characterized by comprising:

  The predetermined threshold value can be changed according to the performance level. According to the present invention, it is possible to generate an arrangement performance information file in which the number of chord constituent sounds is appropriately changed according to the performance level.

Also, an object of the present invention is to store a performance information file that includes note records each having a pointer indicating a pitch of a tone to be pronounced, a pronunciation start time, and a record of a note to be pronounced next. Means,
In the performance information file, with reference to the sound generation start time and the record of the note to be sounded next, a chord constituent sound specification that specifies a note to be processed and a note to be a chord constituent sound generated simultaneously with the note Means and
If the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds corresponding to the chord constituent sounds that have exceeded the threshold value are deleted from those with high pitches, and the deleted chords are deleted. Arrangement means having arrangement performance information file generation means for generating an arrangement performance information file which is a new performance information file from which the record of the constituent sound has been deleted and stores the generated arrangement performance information file in the storage means When,
It is achieved by an automatic arrangement device characterized by comprising:

Another object of the present invention is to store a performance information file that includes a record of notes each having a track, a pitch of a tone to be pronounced, a pronunciation start time, and a pointer indicating the record of the note to be pronounced next. Storage means
In the performance information file, a chord that identifies a note to be processed and a note to be a chord constituent sound that is simultaneously sounded on the same track as the note by referring to the sound start time and the record of the next note to be sounded Component sound identification means, and
For the high-pitched track, if the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds that have exceeded the threshold value are deleted from the low chord constituent sounds. Generating an arrangement performance information file which is a new performance information file in which the deleted chord component sound record is deleted, and the number of the chord component sounds is a predetermined number for the lower-side track. When the threshold value is exceeded, in the chord component sound, the chord component sound that exceeds the threshold value is deleted from the highest pitch, and the record of the deleted chord component sound is deleted. An arrangement performance unit having an arrangement performance information file generation unit that generates an arrangement performance information file that is a new performance information file and stores the generated arrangement performance information file in the storage unit;
It is achieved by an automatic arrangement device characterized by comprising:

In a preferred embodiment, the chord constituent sound specifying means specifies the chord constituent sound from the lowest pitches, counts the number thereof, and generates a count value,
The arrangement performance information file generation means deletes the lowest tone of the chord constituent sound when the count value exceeds a threshold when the note to be counted becomes the highest tone of the chord constituent tone. It is configured as follows.

In another preferred embodiment, the chord constituent sound specifying means specifies the chord constituent sound from the lowest pitches, counts the number thereof, and generates a count value.
The arrangement performance information file generating means is configured to delete a chord constituent sound related to counting of the count value exceeding the threshold when the count value exceeds the threshold.

Another object of the present invention is to store a performance information file that includes a record of notes each having a track, a pitch of a tone to be pronounced, a pronunciation start time, and a pointer indicating the record of the note to be pronounced next. Storage means
An arrangement performance information file that is a new performance information file in which a record relating to a note that does not start sounding at a position on a predetermined time axis is deleted with reference to the sounding start time of the record of the performance information file This is achieved by an automatic arrangement apparatus comprising: arrangement means for generating and arranging the generated arrangement performance information file in the storage means.

  The interval between the positions on the predetermined time axis can be changed according to the performance level.

  In a preferred embodiment, the arrangement means calculates a position on the time axis in the measure of the pronunciation start time for the note, and determines whether the position matches the position on the predetermined time axis. Is configured to do.

Also, an object of the present invention is to store a performance information file that includes note records each having a pointer indicating a pitch of a tone to be pronounced, a pronunciation start time, and a record of a note to be pronounced next. In a computer comprising an apparatus, the computer includes:
In the performance information file, with reference to the sound generation start time and the record of the note to be sounded next, a chord constituent sound specification that specifies a note to be processed and a note to be a chord constituent sound generated simultaneously with the note Steps and
If the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds corresponding to the chord constituent sounds that have exceeded the threshold value are deleted from those with low pitches, and the deleted chords are deleted. Generating an arrangement performance information file which is a new performance information file in which the record of the constituent sound is deleted, and executing an arrangement performance information file generation step of storing the generated arrangement performance information file in the storage device Achieved by an automatic arrangement program characterized by

Also, an object of the present invention is to store a performance information file that includes note records each having a pointer indicating a pitch of a tone to be pronounced, a pronunciation start time, and a record of a note to be pronounced next. In a computer comprising an apparatus, the computer includes:
In the performance information file, with reference to the sound generation start time and the record of the note to be sounded next, a chord constituent sound specification that specifies a note to be processed and a note to be a chord constituent sound generated simultaneously with the note Steps and
If the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds corresponding to the chord constituent sounds that have exceeded the threshold value are deleted from those with high pitches, and the deleted chords are deleted. Generating an arrangement performance information file which is a new performance information file in which the record of the constituent sound is deleted, and executing an arrangement performance information file generation step of storing the generated arrangement performance information file in the storage device Achieved by an automatic arrangement program characterized by

Furthermore, an object of the present invention is to store a performance information file, each containing a record of notes having a track, a pitch of a musical tone to be pronounced, a pronunciation start time, and a pointer indicating the record of the note to be pronounced next In a computer provided with the storage device, the computer
In the performance information file, a chord that identifies a note to be processed and a note to be a chord constituent sound that is simultaneously sounded on the same track as the note by referring to the sound start time and the record of the next note to be sounded Component sound identification step, and
For the high-pitched track, if the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds that have exceeded the threshold value are deleted from the low chord constituent sounds. Generating an arrangement performance information file which is a new performance information file in which the deleted chord component sound record is deleted, and the number of the chord component sounds is a predetermined number for the lower-side track. When the threshold value is exceeded, in the chord component sound, the chord component sound that exceeds the threshold value is deleted from the highest pitch, and the record of the deleted chord component sound is deleted. Generating an arrangement performance information file, which is a new performance information file, and executing an arrangement performance information file generation step of storing the generated arrangement performance information file in the storage device. It is achieved by automatic arrangement program.

In a preferred embodiment, in the chord constituent sound specifying step, the computer is caused to execute the step of specifying the chord constituent sound from the lowest pitches, counting the number thereof, and generating a count value. ,
In the arrangement performance information file generation step, when the note to be counted becomes the highest tone of the chord component sound, the computer determines that the lowest value of the chord component sound when the count value exceeds a threshold value. The step of deleting the sound is executed.

In another preferred embodiment, in the chord constituent sound specifying step, the computer specifies the chord constituent sounds from the lowest pitches, counts the number thereof, and generates a count value. Let it run
In the arrangement performance information file generation step, when the count value exceeds a threshold value, the computer is caused to execute a step of deleting a chord constituent sound related to the count value exceeding the threshold value.

Another object of the present invention is to store a performance information file that includes a record of notes each having a track, a pitch of a tone to be pronounced, a pronunciation start time, and a pointer indicating the record of the note to be pronounced next. In a computer provided with the storage device, the computer
An arrangement performance information file that is a new performance information file in which a record relating to a note that does not start sounding at a position on a predetermined time axis is deleted with reference to the sounding start time of the record of the performance information file It is achieved by an automatic arrangement program characterized by causing an arrangement step of generating and storing the generated arrangement performance information file in the storage device.

  In a preferred embodiment, in the arranging step, the computer calculates a position on the time axis in the measure of the pronunciation start time for the note, and whether the position matches the position on the predetermined time axis. The step of determining whether or not is executed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the automatic arrangement apparatus and arrangement program which can arrange the music according to a performer's performance level without a musical discomfort.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an automatic arrangement device according to an embodiment of the present invention. As shown in FIG. 1, the automatic arrangement device according to the present embodiment includes a musical sound reproduction processing unit 12, an arrangement processing unit 14, a score conversion processing unit 16, a score drawing processing unit 20, and a storage device 22. Yes. The storage device 22 stores a performance information file 24, an arrangement performance information file 26, a score information file 28, and the like.

  The musical sound reproduction processing unit 12 performs the performance information in the performance information file 24 stored in the storage device 22 and the information in the arrangement performance information file 26 that is information on the music arranged based on the performance information in the performance information file 24. A musical tone having a predetermined pitch is output according to the information. The arrangement processing unit 14 corrects the performance information based on the performance information in the performance information file 24, arranges the performance information to generate new performance information, and arranges the file including the new performance information into the arrangement performance information. The file 26 is stored in the storage device 22. The score conversion processing unit 16 generates score information based on the new performance information generated by the arrangement processing unit 14 and stores a score information file 28 including the score information in the storage device 28. The score drawing processing unit 20 generates score image data to be displayed on the screen of the display device based on the score information in the score information file 28.

  As will be described in detail later, the performance information file 24 stores a record having a pitch, a sound generation start time, a pointer indicating a record of a note to be sounded next, and the like for each track note. The arrangement processing unit 14 refers to the sound generation start time and the record of the note to be sounded next in the performance information file 24, and becomes a chord constituent sound that is simultaneously sounded on the same track as the note to be processed. Identify notes. In addition, the arrangement processing unit 14 has a low pitch in the chord constituent sound when the number of chord constituent sounds exceeds a predetermined threshold for a track to be played with the right hand, that is, a high-pitched track. An arrangement performance information file 26, which is a new performance information file, is generated by deleting chord constituent sounds that exceed the threshold value from the one and deleting the record of the deleted chord constituent sounds. In addition, the arrangement processing unit 14 has a high pitch in the chord constituent sound when the number of chord constituent sounds exceeds a predetermined threshold for the track to be played with the left hand, that is, the low-pitched track. An arrangement performance information file 26, which is a new performance information file, is generated by deleting chord constituent sounds that exceed the threshold value from the one and deleting the record of the deleted chord constituent sounds. The generated arrangement performance information file 26 is stored in the storage device 22.

  FIG. 2 is a block diagram showing a hardware configuration of the automatic arrangement apparatus according to the present embodiment. As shown in FIG. 2, the hardware of the automatic arrangement device includes a CPU 30, a ROM 32, a RAM 34, an input device 36, a display device 38, and a sound system 40. As can be understood from FIG. 2, the automatic arrangement device can be realized by a normal personal computer. The CPU 30 executes processes such as system control, correction of performance information, arrangement, generation of musical score information, and generation of image data to be displayed on the screen of the display device. The ROM 32 stores programs, constants used when the programs are executed, and the like. The RAM 34 temporarily stores variables, input data, output data, and the like necessary in the course of program execution.

  The input device 36 has a keyboard and a mouse, and the performer points the notes in the score displayed on the screen of the display device, inputs necessary instructions, or starts various functions of the automatic arrangement device and Information for instructing termination is given to the CPU 30. On the screen of the display device 38, image data including a processing result, a score, and the like are displayed. The sound system 40 includes a musical sound generation circuit, an amplifier, a speaker, and the like, generates predetermined musical sounds according to instructions and performance information from the CPU 30, and outputs acoustic signals based on the musical sounds.

  The functions of the musical tone reproduction processing unit 12 shown in FIG. 1 are realized by the musical tone generation circuit of the CPU 30 and the sound system 40. The functions of the arrangement processing unit 14, the score conversion processing unit 16, and the score drawing processing unit 20 are realized by the CPU 30. The storage device 22 corresponds to, for example, the ROM 32 or the RAM 34. Alternatively, when a hard disk device is included as hardware of the automatic arrangement device, the storage device 22 corresponds to the hard disk device.

  In the automatic arrangement device according to the present embodiment, for example, a program stored in the ROM 32 of the automatic arrangement device is used to convert the computer into a musical tone reproduction processing unit 12, an arrangement processing unit 14, a musical tone conversion processing unit 16, and a score drawing processing unit 20. To function as.

  FIG. 3 is a flowchart showing a main flow of the automatic arrangement apparatus according to the present embodiment. In the main flow, after initialization of various components of the automatic arrangement device (step 301), the process waits for key input from the performer (step 302), song selection (step 303), and various settings (steps). 308), predetermined processing is executed in response to an instruction such as a reproduction instruction (step 310).

  When a song is selected (Yes in step 303), the arrangement processing unit 16 loads the performance information in the performance information file 24 from the storage device 22, and is included in the performance information according to a predetermined resolution. Quantization processing for correcting the position of each note (note) (sounding start time) and the sound length is executed (step 305). Next, the arrangement processing unit 16 performs arrangement processing for deleting a certain note from the notes indicated in the performance information according to the set performance level, and generates an arrangement performance information file 26 including new performance information. The generated arrangement performance information file 26 is stored in the storage device 22 (step 306). Further, the score conversion processing unit 16 generates a new score information file 28 based on the new performance information, and stores the generated score information file 28 in the storage device 22 (step 307). The score drawing processing unit 20 reads the score information file 28 and displays an image including the score on the screen of the display device.

  If various settings are instructed by the player's input (Yes in Step 308), the setting process according to the instruction is executed (Step 309). In the setting process, parameters necessary for the processing of the automatic arrangement device are stored in the storage device 22 in accordance with the player's instruction. For example, the processing of step 309 includes storing in the storage device 22 parameters relating to the display form, such as how many levels of the staff are displayed when displaying the score. When the performer inputs his / her performance level, the performance level is stored in the storage device 22. This performance level of the performer is used in the arrangement process in step 306.

  If playback is instructed (Yes in step 310), a playback routine is started (step 311). FIG. 4 is a flowchart showing a reproduction routine according to the present embodiment. In the reproduction routine, the sound generation process is executed (step 402) unless reproduction of all the notes in the performance information is completed or unless there is an instruction to end the performance from the performer (No in step 401). In the sound generation process, the musical tone reproduction processing unit 12 generates a musical tone having a predetermined pitch at a predetermined timing based on the performance information in the performance information file 24 or the arrangement performance information file 26.

  When the sound generation process is completed, the score drawing processing unit 20 updates the image including the score to be displayed on the screen of the display device 38 so as to match the progress of the performance as the musical sound is generated (step 403).

  FIG. 5 is a diagram showing a configuration example of a performance information file according to the present embodiment. In this embodiment, it has performance information of a plurality of tracks, and each track has a list structure. As shown in FIG. 5, the performance information file stores records (see reference numerals 501 and 502) indicating MIDI events for each track. Each record includes mMsg (MIDI data), ITime (sounding start time), IGate (sound length), * next (pointer to the next note), and * prev (pointer to the previous note). The pitch of the musical tone to be generated is determined by the MIDI data (mMsg). The sound generation start time of the musical sound and the length of time to be sounded are determined by the sound generation start time (ITTime) and the sound length (IGate). In the present embodiment, there may be a plurality of records having the same sound generation start time (ITTime) in the same track. This indicates that each note of the plurality of records is a chord constituent sound. In the present embodiment, for notes that are chord constituent sounds, records are arranged in order of increasing pitches shown in MIDI data (mMsg). That is, by following the pointer “* next”, it is possible to specify notes that are chord constituent sounds in descending order of pitch. In the present embodiment, the note on track 0 is a tone to be played with the right hand, and the note on track 1 is a tone to be played with the left hand.

  In the example of FIG. 5, the record of the second note on track 0 (see reference numeral 511) is designated by the item * next of the record of the first note on track 0 (see reference numeral 501). The reverse specification can also be realized by referring to the item * prev of the record 511. Further, the second record (see reference numeral 512) of track 1 is designated by the item * next of the record of the first note of track 1 (see reference numeral 502).

  Hereinafter, the quantization process and the arrangement process executed when the music piece is selected by the performer, in particular, the arrangement process will be described in more detail.

  In the quantizing process, in each track, referring to the record of the note (for example, reference numerals 501 and 511 in FIG. 5) sequentially from the first note, the sound generation start time (ITTime) and the sound length (IGate) of the record are determined. Referring to the sound generation start time (ITTime) of the musical sound that does not match a predetermined resolution unit in the automatic arrangement device, the sound generation start time is corrected to match the resolution unit. Also, if the sound length (IGate) is shorter than the unit of decomposition or does not match the resolution unit, the sound length (IGate) is corrected to match the resolution unit.

  By the quantizing process, the sound generation start time (ITetime) and the sound length (IGate) in the record are updated, whereby a performance information file including new performance information is stored in the storage device 22. However, this is not an arrangement performance information file that has finally undergone arrangement processing, but a performance information file that is temporarily stored in the storage device 22 that is to be subjected to arrangement processing.

  6 and 7 are flowcharts showing the arrangement process according to the present embodiment in more detail. 6 and 7, a parameter me indicates a note that is currently processed, and a parameter ne indicates a chord constituent sound that includes me, and indicates a chord constituent sound that is a processing target.

  The arrangement processing unit 14 first initializes a processing parameter i (step 601). If the parameter i is not larger than 1 (No in step 602), the arrangement processing unit 14 executes the processing described below.

  The arrangement processing unit 14 initializes the parameter me (step 603). In other words, the record of the first note of a certain track is the processing target. When the process with all notes as me is completed (Yes in step 604), the processing parameter i is incremented (step 609), and the process returns to step 602.

  If it is determined No in step 604, the arrangement processing unit 14 determines whether me is a chord constituent sound (step 605). Being a chord constituent sound means that there are one or more other notes having the same sounding start time (ITTime) among the notes of the same track. Therefore, the arrangement processing unit 14 refers to the items of “* next” and “* preb” in the record of the note of the same track of the record of me to be processed in the performance information file 24, and records the record of me. It may be determined whether or not there is a record having the same sounding time (ITetime) as the sounding start time (ITetime). If NO is determined in step 605, me is set as the next note (step 708 in FIG. 7), and the process returns to step 604. In step 708, the next note may be determined by referring to “* next” of the record related to me that is currently processed, and setting the note related to the record indicated by the “* next” as the next me.

  If it is determined Yes in step 605, the arrangement processing unit 14 initializes the parameter j used as the count value of the chord constituent sound and sets the note me as the parameter ne of the chord constituent sound (step 607). . If the arrangement processing unit 14 determines that the processing has been completed for all the chord constituent sounds including me (Yes in step 608), the arrangement processing unit 14 proceeds to step 708. On the other hand, if it is determined No in step 608, it is determined whether the note me is a tone to be played with the left hand or a tone to be played with the right hand (step 701).

  When the note me is a musical sound to be played with the left hand (Yes in Step 701), the arrangement processing unit 14 is based on the count value j and the performance level stored in the storage device 22 in Step 309 of FIG. The threshold iMin is compared (step 703). The determination in step 701 can be realized by referring to the track number of the record of note me. The threshold value iMin is a parameter indicating how many notes remain as a chord, and the value increases as the performance level increases (that is, the difficulty level increases). As will be described later, in the present embodiment, “threshold iMin−1” chord constituent sounds are left by the arrangement process. Therefore, for example, by associating the performance level with “threshold iMin−1”, if the performance level is 1, only one note remains in a certain track, and if the performance level is 2, two in a certain track. It can be set to leave notes.

  If it is determined Yes in step 703, that is, if the count value j is equal to or greater than the threshold value iMin, the note ne of the chord constituent sound is deleted (step 704). Steps 703 and 704 have the following significance. In the case of a musical tone to be played with the left hand, the chord constituent sound is traced in order from the bottom, and the jth chord constituent sound from the lowest is deleted from the chord constituent sound if j is equal to or greater than iMin.

  When deleting a note from a chord constituent sound, the record related to the note ne to be deleted is deleted from the arrangement performance information file 26 including new performance information, and the note before the record related to the note ne to be deleted is deleted. The former * next and the latter * prev are updated so that the record regarding and the record regarding the note after the note ne to be deleted are associated with each other.

  After that, the arrangement processing unit 14 sets the note ne regarding the chord constituent sound as the next note (step 706). Similar to step 708 in FIG. 7, in step 706, with reference to “* next” of the record relating to the note ne currently being processed, the note relating to the record indicated by the “* next” is changed to the next note ne. What should I do? The arrangement processing unit 14 increments the count value j of the chord component sound (step 707) and returns to step 608.

  Next, the case where the note me is a musical sound to be played with the right hand (No in step 701) will be described. In this case, the arrangement processing unit 14 determines whether or not the note ne is the highest chord (step 709). If it is determined No in step 709, the process proceeds to step 706, and the arrangement processing unit 14 sets the note ne regarding the chord constituent sound as the next note.

  On the other hand, if it is determined Yes in step 709, the arrangement processing unit 14 deletes the note me if the count value j is equal to or greater than the threshold value iMin (Yes in step 710) (step 711). Here, the note me that has been processed is deleted. Steps 710 and 711 have the following significance. In the case of a musical tone that should be played with the right hand, if the musical tone component is traced from the bottom up and reached the highest tone of the chord component, and the count value j is equal to or greater than iMin, the chord component The note corresponding to the lowest note is deleted from the chord component.

  When deleting notes from a chord constituent sound, a record related to the note me to be deleted is deleted, and a record related to a note before the record related to the note me to be deleted and a note after the note me to be deleted. The former * next and the latter * prev are updated so that the records related to Thereafter, the arrangement processing unit 25 sets the note me to be processed as the next note (step 708), and returns to step 604.

  As described above, according to the present embodiment, in the case of a musical sound to be played with the left hand, when the number j of chord constituent sounds exceeds a predetermined threshold value (iMin), the chord constituent sounds are more The chord component is deleted from the highest one. On the other hand, in the case of a musical tone to be played with the right hand, if the number j of chord constituent sounds exceeds a predetermined threshold value (iMin), the lower one of the chord constituent sounds, Deleted. In the case of a musical tone to be played with the left hand, it is highly likely that the lowest tone is the root tone in the chord component tone, while in the case of a musical tone to be played with the right hand, in the chord component tone, This is because the possibility that the highest note is a melody is high.

  FIG. 8A is a diagram showing a score based on the original performance information in the present embodiment, and FIGS. 8B and 8C are diagrams showing examples of the score based on the arrangement performance information that has undergone the arrangement processing. is there. FIG. 8B shows an example of an arrangement (iMin = 3) that leaves two of the chord constituent sounds, and FIG. 8C shows an arrangement (iMin = 2) that leaves one of the chord constituent sounds. ).

  According to the first embodiment, arrangement processing is performed so as to reduce the number of chord constituent sounds, and an arrangement performance information file is generated. Therefore, it is possible to generate an arrangement performance information file suitable for the level of the performer without musical discomfort.

  Further, according to the first embodiment, for the musical sound to be played with the right hand, in the chord constituent sound, the musical sound is deleted so as to leave the highest tone, and for the musical sound to be played with the left hand, the chord constituent sound Create an arrangement performance information file that deletes the musical tone so that the lowest note is left. An important melody is left for a musical tone to be played with the right hand, and an important root tone is also left for a musical tone to be played with the left hand, so that it is possible to realize an optimal arrangement with no musical discomfort.

  Next, a second embodiment of the present invention will be described. In the first embodiment, a part of the chord component sound is deleted, but in the second embodiment, a note finer than a predetermined sound resolution is deleted in the time axis direction. . That is, the arrangement processing unit 14 according to the second embodiment refers to the sound generation start time of the record in the performance information file 24 and deletes the record related to the note that does not start sounding at a position on the predetermined time axis. Such a new arrangement performance information file 26 is generated.

  FIG. 9 is a flowchart showing arrangement processing according to the second embodiment of the present invention. As shown in FIG. 9, the arrangement processing unit 14 initializes a processing parameter i (step 901), and if the parameter i is not larger than 1 (No in step 902), executes the processing described below. To do.

  The arrangement processing unit 14 initializes the parameter me (step 903). When the process with all the notes as me is completed (Yes in Step 904), the processing parameter i is incremented (Step 909), and the process returns to Step 902.

  If it is determined No in step 904, the arrangement processing unit 14 refers to the record relating to me, calculates the number of beats at the start of note production based on the ITime (pronunciation start time) of the record, and the length of the measure. Divide (divide) by, and let the remainder be iAmari (step 905). By step 905, it is possible to calculate at what beat the note starts to be pronounced.

  Next, the arrangement processing unit 14 determines whether or not the remainder obtained by dividing iAmari by the parameter iLen is “0” (step 906). If it is determined No in step 906, the arrangement processing unit 14 deletes the note me (step 907). iLen is a parameter indicating how much resolution a note is to be kept, and its value decreases as the performance level increases (that is, the difficulty level increases). For example, a value corresponding to a quarter note, an eighth note, or a sixteenth note can be set as the parameter iLen. The set parameter iLen is stored in the storage device 22 and referred to in the processing shown in FIG.

  For example, if the set parameter iLen is a value corresponding to a quarter note, a note located other than where it is divided equally by the length of a quarter note (for example, the beginning of a beat in a 4/4 time signature) All are deleted. If the set parameter iLen is a value corresponding to a sixteenth note, all notes located at locations other than those equally divided by the sixteenth note are deleted. In the deletion of the note me, as in the first embodiment, the record relating to the note ne to be deleted is deleted from the arrangement performance information file 26 including new performance information, and the note ne to be deleted is deleted. The former * next and the latter * prev are updated so that the record related to the note before the record regarding and the record related to the note after the note ne to be deleted are associated with each other.

  Thereafter, the arrangement processing unit 14 sets me as the next note (step 908) and returns to step 904. In step 908, as in the first embodiment, referring to “* next” of the record related to me that is currently processed, the note related to the record indicated by “* next” is set to the next me and Just do it.

  FIG. 10A shows an example of a score based on the original performance information in the present embodiment, and FIG. 10B shows an example of a score based on the arrangement performance information that has undergone the arrangement process. In the example of FIG. 10B, for the musical sound to be played with the right hand, the first embodiment is applied, arranged (iMin = 3) so as to leave two of the chord constituent sounds, and with the left hand. For the musical sound to be played, both the first embodiment and the second embodiment are applied, leaving one of the chord constituent sounds (iMin = 2), and the position of the quarter note (measure) Arrangement (iLen = quarter note) is performed so as to delete notes other than the head and the position divided into two equal bars.

  According to the second embodiment, the position on the time axis in the measure of the pronunciation start time for the note is calculated, and the position on the time axis in the calculated measure matches the position on the predetermined time axis. If not, the notes are thinned out to generate an arrangement performance information file including new performance information from which the notes are thinned out. Therefore, the performance information can be changed in a direction that simplifies the beat structure and rhythm structure, and in particular, the musical sound to be played with the left hand (the left hand part) is musical without interfering with the flow of the accompaniment by the left hand. Therefore, it is possible to realize an arrangement that is appropriate for the above.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

  For example, in the above-described embodiment, the performance information includes two tracks. The high-pitched track 0 is a musical tone to be played with the right hand, and the low-pitched track 1 is a musical tone to be played with the left hand. However, the performance information may include three or more tracks. In this case, it is determined whether each track should be played with the left hand (bass side) or with the right hand (treble side), and the process is executed according to the judgment. Just do it.

  In the present embodiment, the automatic arrangement apparatus may be configured to execute one of processing related to a musical sound to be played with the right hand or processing related to a musical sound to be played with the left hand. Furthermore, the automatic arrangement device may be configured to execute both the process according to the first embodiment and the process according to the second embodiment.

FIG. 1 is a block diagram showing a configuration of an automatic arrangement device according to an embodiment of the present invention. FIG. 2 is a block diagram showing a hardware configuration of the automatic arrangement apparatus according to the present embodiment. FIG. 3 is a flowchart showing a main flow of the automatic arrangement apparatus according to the present embodiment. FIG. 4 is a flowchart showing a reproduction routine according to the present embodiment. FIG. 5 is a diagram showing a configuration example of a performance information file according to the present embodiment. FIG. 6 is a flowchart showing the arrangement process according to the present embodiment in more detail. FIG. 7 is a flowchart showing the arrangement process according to the present embodiment in more detail. FIG. 8A is a diagram showing a score based on the original performance information in the present embodiment, and FIGS. 8B and 8C are diagrams showing examples of the score based on the arrangement performance information that has undergone the arrangement processing. is there. FIG. 9 is a flowchart showing arrangement processing according to the second embodiment of the present invention. FIG. 10A shows an example of a score based on the original performance information in the present embodiment, and FIG. 10B shows an example of a score based on the arrangement performance information that has undergone the arrangement process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Music sound reproduction process part 14 Arrangement process part 16 Musical score conversion process part 20 Musical score drawing process part 22 Storage device 24 Performance information file 25 Arrangement performance information file 28 Musical score information file

Claims (14)

A storage means for storing a performance information file each including a note record having a pitch indicating a pitch of a musical tone to be pronounced, a pronunciation start time, and a pointer indicating a record of a note to be pronounced next;
In the performance information file, with reference to the sound generation start time and the record of the note to be sounded next, a chord constituent sound specification that specifies a note to be processed and a note to be a chord constituent sound generated simultaneously with the note Means and
If the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds corresponding to the chord constituent sounds that have exceeded the threshold value are deleted from those with low pitches, and the deleted chords are deleted. Arrangement means having arrangement performance information file generation means for generating an arrangement performance information file which is a new performance information file from which the record of the constituent sound has been deleted and stores the generated arrangement performance information file in the storage means When,
An automatic arrangement device characterized by comprising: A storage means for storing a performance information file each including a note record having a pitch indicating a pitch of a musical tone to be pronounced, a pronunciation start time, and a pointer indicating a record of a note to be pronounced next;
In the performance information file, with reference to the sound generation start time and the record of the note to be sounded next, a chord constituent sound specification that specifies a note to be processed and a note to be a chord constituent sound generated simultaneously with the note Means and
If the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds corresponding to the chord constituent sounds that have exceeded the threshold value are deleted from those with high pitches, and the deleted chords are deleted. Arrangement means having arrangement performance information file generation means for generating an arrangement performance information file which is a new performance information file from which the record of the constituent sound has been deleted and stores the generated arrangement performance information file in the storage means When,
An automatic arrangement device characterized by comprising: Storage means each storing a performance information file including a track, a pitch of a musical tone to be sounded, a sounding start time, and a note record having a pointer indicating a record of a note to be sounded next;
In the performance information file, a chord that identifies a note to be processed and a note to be a chord constituent sound that is simultaneously sounded on the same track as the note by referring to the sound start time and the record of the next note to be sounded Component sound identification means, and
For the high-pitched track, if the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds that have exceeded the threshold value are deleted from the low chord constituent sounds. Generating an arrangement performance information file which is a new performance information file in which the deleted chord component sound record is deleted, and the number of the chord component sounds is a predetermined number for the lower-side track. When the threshold value is exceeded, in the chord component sound, the chord component sound that exceeds the threshold value is deleted from the highest pitch, and the record of the deleted chord component sound is deleted. An arrangement performance unit having an arrangement performance information file generation unit that generates an arrangement performance information file that is a new performance information file and stores the generated arrangement performance information file in the storage unit;
An automatic arrangement device characterized by comprising: The chord constituent sound specifying means specifies the chord constituent sound from the ones whose pitches are low, counts the number thereof, and generates a count value,
The arrangement performance information file generation means deletes the lowest tone of the chord constituent sound when the count value exceeds a threshold when the note to be counted becomes the highest tone of the chord constituent tone. 4. The automatic arrangement apparatus according to claim 1, wherein the automatic arrangement apparatus is configured as described above. The chord constituent sound specifying means specifies the chord constituent sound from the ones whose pitches are low, counts the number thereof, and generates a count value,
3. The arrangement performance information file generating unit is configured to delete a chord constituent sound related to counting of a count value exceeding the threshold when the count value exceeds a threshold. Or the automatic arrangement device of 3. Storage means each storing a performance information file including a track, a pitch of a musical tone to be sounded, a sounding start time, and a note record having a pointer indicating a record of a note to be sounded next;
An arrangement performance information file that is a new performance information file in which a record relating to a note that does not start sounding at a position on a predetermined time axis is deleted with reference to the sounding start time of the record of the performance information file An automatic arrangement apparatus comprising: arrangement means for generating and arranging the generated arrangement performance information file in the storage means.   The arrangement means is configured to calculate a position on a time axis within a measure of a pronunciation start time for the note, and to determine whether the position matches a position on the predetermined time axis. The automatic arrangement device according to claim 6. A computer comprising a storage device storing a performance information file each including a note record having a pointer indicating a pitch of a musical tone to be pronounced, a pronunciation start time, and a record of a note to be pronounced next, On the computer,
In the performance information file, with reference to the sound generation start time and the record of the note to be sounded next, a chord constituent sound specification that specifies a note to be processed and a note to be a chord constituent sound generated simultaneously with the note Steps and
If the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds corresponding to the chord constituent sounds that have exceeded the threshold value are deleted from those with low pitches, and the deleted chords are deleted. Generating an arrangement performance information file which is a new performance information file in which the record of the constituent sound is deleted, and executing an arrangement performance information file generation step of storing the generated arrangement performance information file in the storage device An automatic arrangement program characterized by A computer comprising a storage device storing a performance information file each including a note record having a pointer indicating a pitch of a musical tone to be pronounced, a pronunciation start time, and a record of a note to be pronounced next, On the computer,
In the performance information file, with reference to the sound generation start time and the record of the note to be sounded next, a chord constituent sound specification that specifies a note to be processed and a note to be a chord constituent sound generated simultaneously with the note Steps and
If the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds corresponding to the chord constituent sounds that have exceeded the threshold value are deleted from those with high pitches, and the deleted chords are deleted. Generating an arrangement performance information file which is a new performance information file in which the record of the constituent sound is deleted, and executing an arrangement performance information file generation step of storing the generated arrangement performance information file in the storage device An automatic arrangement program characterized by In a computer provided with a storage device each storing a performance information file including a track, a pitch of a musical tone to be pronounced, a pronunciation start time, and a note record having a pointer indicating the record of the next note to be pronounced To the computer,
In the performance information file, a chord that identifies a note to be processed and a note to be a chord constituent sound that is simultaneously sounded on the same track as the note by referring to the sound start time and the record of the next note to be sounded Component sound identification step, and
For the high-pitched track, if the number of chord constituent sounds exceeds a predetermined threshold value, the chord constituent sounds that have exceeded the threshold value are deleted from the low chord constituent sounds. Generating an arrangement performance information file which is a new performance information file in which the deleted chord component sound record is deleted, and the number of the chord component sounds is a predetermined number for the lower-side track. When the threshold value is exceeded, in the chord component sound, the chord component sound that exceeds the threshold value is deleted from the highest pitch, and the record of the deleted chord component sound is deleted. Generating an arrangement performance information file, which is a new performance information file, and executing an arrangement performance information file generation step of storing the generated arrangement performance information file in the storage device. Automatic arrangement program. In the chord component sound specifying step, the computer is caused to specify the chord component sound from a low pitch, count the number, and generate a count value,
In the arrangement performance information file generation step, when the note to be counted becomes the highest tone of the chord component sound, the computer determines that the lowest value of the chord component sound when the count value exceeds a threshold value. The automatic arrangement program according to claim 8 or 10, wherein a step of deleting a sound is executed. In the chord component sound specifying step, the computer is caused to specify the chord component sound from a low pitch, count the number, and generate a count value,
In the arrangement performance information file generation step, when the count value exceeds a threshold value, the computer is caused to execute a step of deleting a chord constituent sound related to the count value exceeding the threshold value. The automatic arrangement program according to claim 9 or 10. In a computer provided with a storage device each storing a performance information file including a track, a pitch of a musical tone to be pronounced, a pronunciation start time, and a note record having a pointer indicating the record of the next note to be pronounced To the computer,
An arrangement performance information file that is a new performance information file in which a record relating to a note that does not start sounding at a position on a predetermined time axis is deleted with reference to the sounding start time of the record of the performance information file An automatic arrangement program for executing an arrangement step of generating and storing the generated arrangement performance information file in the storage device.   In the arranging step, the computer calculates a position on the time axis within the measure of the pronunciation start time for the note, and determines whether the position matches the position on the predetermined time axis. The automatic arrangement program according to claim 13, wherein:

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