JP2007256364A - Performance data editing device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine reference beats properly giving expressions per part. <P>SOLUTION: With respect to sound production start timings of respective pieces of note-on information in performance data consisting of a plurality of parts, the number of notes being at timings of integral multiples for each of a plurality of kinds of note lengths or being within their allowable ranges is counted. The counted numbers of notes are totalized in all parts, and the totalized numbers of notes are compared for note lengths to determine a note length of notes whose totalized number is largest and which have the longest time length, as a general beat. The numbers of notes counted in each part are compared for note lengths to determine a note length of notes whose totalized number is largest and which have the longest time length, as a partial beat. Reference beats to be used for giving musical expressions are selected from the general beat or partial beats per part. Thus, partial beats are applied to individual parts wherein application of the general beat is difficult, to make it possible to properly give expressions to any part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a performance data editing apparatus and program for performing facial expression that automatically adds a new musical expression to performance data. In particular, the present invention relates to a performance data editing apparatus and program for performing expression processing on performance data based on a reference beat (time signature).

Recently, automatic performance apparatuses (so-called sequencers) that automatically perform musical sounds based on predetermined performance data are known. If the performance data used in such an automatic performance device is composed of only a plurality of pitch information representing each pitch of a series of note strings, the automatic performance of musical sounds performed by reproducing the performance data is not mechanical. A performance with a facial expression will be performed, which is very musically unnatural. Therefore, in order to make these automatic performances more musically natural, beautiful, and lively, it is better to add expressions such as adding various musical expressions and musicality to the musical sounds. For this purpose, it is necessary to newly add performance information representing various musical expressions and musical instrument characteristics to the performance data as control data. Conventionally known as a technique for automatically applying a facial expression, a beat based on performance data is determined in advance and a facial expression is applied by applying the determined reference beat. Yes. For example, in the case of waltz, the reference beat may be a quarter note, and in the case of 16-beat rock, the reference beat may be a sixteenth note. As an example of a performance data editing apparatus that performs such expression, for example, there are technologies described in Patent Document 1 and Patent Document 2 shown below that have already been filed by the present applicant.
JP 2005-249903 A JP 2002-311952 A

  By the way, in the technique described in Patent Document 1 described above, in order to ensure the simplicity of the user operation, one beat (this is based on the performance data of all the parts (or channels) that are targeted for expression. Is called the whole beat for the sake of convenience), and the determined whole beat is applied to all the parts for expression (that is, the whole beat is applied to express the whole song). Use as a reference beat). However, for example, when a part composed mainly of notes with a long note length, such as a pad, and a part composed mainly of notes with a long note length, such as a rhythm, are expressed simultaneously. When the beat for each part determined based only on the performance data of the unit (this is called a partial beat for convenience) is significantly different from the whole beat, it is applied when the whole beat is applied to all parts. Some parts are inconvenient because they do not have an appropriate expression. Therefore, it is desirable to apply a facial expression to a part where the partial beat differs greatly from the whole beat instead of applying the whole beat. It wasn't.

  The present invention has been made in view of the above points, and the reference beat (time signature) to be applied when expressing the performance data of a plurality of parts is determined to be a beat for appropriate expression for each part. It is an object of the present invention to provide a performance data editing apparatus and program that can be performed.

  The performance data editing apparatus according to the present invention relates to a sound generation start timing of each note-on information in performance data composed of a plurality of parts, for each of a plurality of types of note lengths, a timing that is an integral multiple of the note length or within an allowable range thereof. Counting means for each part, and counting the number of notes counted for each part over all parts, comparing the total number of notes for each note length, the maximum number The first determination means for determining the note length having the longest time length as the entire beat, and comparing the number of notes counted for each part for each note length, is the maximum number and has the longest time length. A second deciding means for deciding a long note length as a partial beat of each part, and a selection for selecting either the whole beat or the partial beat as a reference beat for each part; And means, based on the selected reference beat comprises a tone characteristic changing means for changing the tone characteristic to perform musical expressive relative performance data for each part.

  As a preferred embodiment of the present invention, the selection means compares the note length determined for the whole beat for each part with the note length determined for the partial beat, and determines the total beat or the partial beat. Any one of them is automatically selected as a reference beat.

  According to the present invention, the reference beat used when changing the musical sound characteristic so as to perform musical expression on the performance data for each part is selected from either the whole beat or the partial beat. The total beat counts the number of notes counted for each part over all the parts, and the total number of notes is compared for each note length to determine the maximum note length and the longest note length. Here, the number of notes counted for each part refers to a timing that is an integral multiple of the note length for each of a plurality of types of note lengths with respect to the sound generation start timing of each note-on information in performance data consisting of a plurality of parts. The number of notes within the allowable range is counted for each part. On the other hand, the partial beat is determined to be the maximum note length and the longest note length by comparing the number of notes counted for each part for each note length. Then, for each part, either the whole beat or the partial beat is selected as the reference beat. At this time, the note length determined for the whole beat is compared with the note length determined for the partial beat, and either the whole beat or the partial beat is automatically selected as the reference beat. In this way, by applying partial beats to individual parts where it is difficult to apply full beats without compromising the user-friendliness of applying full beats collectively to multiple parts, Appropriate expression can be applied to the part.

  The present invention can be constructed and implemented not only as a device invention but also as a method invention. Further, the present invention can be implemented in the form of a program of a processor such as a computer or a DSP, or can be implemented in the form of a storage medium storing such a program.

  According to the present invention, as a reference beat to be applied when performing expression on performance data composed of a plurality of parts, the overall beat determined by analyzing the performance data of the entire parts, and the performance of each part unit Since it can be appropriately selected from any of the individual partial beats determined by analyzing the data, it becomes possible to perform appropriate facial expression for each part without impairing the ease of user operation. The effect is obtained.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a hardware configuration block diagram showing the overall configuration of an electronic musical instrument to which a performance data editing apparatus according to the present invention is applied. The electronic musical instrument shown in this embodiment is controlled by a microcomputer including a microprocessor unit (CPU) 1, a read only memory (ROM) 2, and a random access memory (RAM) 3. The CPU 1 controls the operation of the entire electronic musical instrument. To this CPU 1, the ROM 2, RAM 3, detection circuits 4 and 5, display circuit 6, tone generator circuit 7, effect circuit 8, external storage device 10, MIDI interface (I / F) 11 and the like are connected to the CPU 1 via the data and address bus 1D. Communication interfaces (I / F) 12 are connected to each other. Further, the CPU 1 is connected to a timer 1A for measuring the interrupt time and various times in the timer interrupt process (interrupt process). For example, the timer 1A generates a clock pulse, and gives the generated clock pulse to the CPU 1 as a processing timing command or to the CPU 1 as an interrupt command. The CPU 1 executes various processes according to these instructions.

  The ROM 2 stores various programs executed by the CPU 1 and various data. The RAM 3 is used as a working memory that temporarily stores various data generated when the CPU 1 executes a predetermined program, or as a memory that stores a currently executed program and related data. A predetermined address area of the RAM 3 is assigned to each function and used as a register, flag, table, memory, or the like. The performance operator 4A is, for example, a keyboard provided with a plurality of keys for selecting the pitch of a musical tone, and has a key switch corresponding to each key. A keyboard or the like) can be used for manual performance by the user's own playing, and can also be used as input means for selecting automatic performance data to be displayed on the electronic musical instrument. . The detection circuit 4 generates a detection output by detecting the pressing and release of each key of the performance operator 4A. The setting operator (switch, etc.) 5A, for example, a data selection switch for selecting performance data to be expressed, a facial expression start switch for instructing the start of automatic facial expression, and an instruction to start / stop automatic performance based on the performance data. There is an automatic performance start / stop switch. Of course, in addition to these, a numeric keypad for inputting numeric data, a keyboard for inputting character data, and a predetermined pointing device displayed on the display 6A, which are used for selecting, setting and controlling the pitch, tone color, effect, etc. Various operators such as a mouse used for operation may be included. The detection circuit 5 detects the operation state of each switch and outputs switch information corresponding to the operation state to the CPU 1 via the data and address bus 1D.

  The display circuit 6 displays, for example, a list of performance data that can be designated as an expression object and the control state of the CPU 1 on a display 6A constituted by a liquid crystal display panel (LCD), a CRT, or the like. By referring to these various types of information displayed on the display 6A, the user can easily select, for example, performance data desired to be a facial expression. The tone generator circuit 7 can simultaneously generate musical tone signals on a plurality of channels, and is generated in response to the operation of the performance operator 4A by the user, which is given via the data and address bus 1D, or in performance data. Various performance information generated based on the performance information is input, and a musical sound signal is generated based on the performance information. The musical sound signal generated from the sound source circuit 7 is given an effect via the effect circuit 8 and is generated from the sound system 9 including an amplifier and a speaker. Any conventional configuration may be used for the sound source circuit 7, the effect circuit 8, and the sound system 9. For example, the tone generator circuit 8 may employ any of various tone synthesis methods such as FM, PCM, physical model, formant synthesis, etc., or may be constituted by dedicated hardware or by software processing by the CPU 1. May be.

  The external storage device 10 stores various data such as performance data and data related to control such as various control programs executed by the CPU 1. When no control program is stored in the ROM 2, the control program is stored in the ROM 2 by storing the control program in the external storage device 10 (for example, a hard disk) and reading it into the RAM 3. The CPU 1 can be operated in the same manner as in the case. In this way, control programs can be easily added and upgraded. The external storage device 10 is not limited to a hard disk (HD), but a flexible disk (FD), a compact disk (CD-ROM / CD-RAM), a magneto-optical disk (MO), a DVD (Digital Versatile Disk), etc. Any storage device may be used as long as the storage device uses various external storage media. Alternatively, a semiconductor memory such as a flash memory may be used.

  The MIDI interface (I / F) 11 inputs performance data (MIDI data) in MIDI format from another externally connected MIDI device 11A or the like to the electronic musical instrument, or from the electronic musical instrument (MIDI performance data ( This is an interface for outputting (MIDI data) to another MIDI device 11A or the like. The other MIDI device 11A may be any device that generates MIDI data in response to a user's operation, and includes any type of operator such as a keyboard type, a stringed instrument type, a wind instrument type, a percussion instrument type, and a body-mounted type ( Alternatively, it may be a device). The MIDI interface 11 is not limited to the one using a dedicated MIDI interface, and the MIDI interface 11 is configured using a general-purpose interface such as RS-232C, USB (Universal Serial Bus), IEEE1394 (ITriple 1394). You may make it do. In this case, data other than MIDI event data may be transmitted and received simultaneously. When the general-purpose interface as described above is used as the MIDI interface 11, the other MIDI device 11A may be able to transmit and receive data other than the MIDI event data. Of course, the data format of the performance data is not limited to the data in the MIDI format, and may be in other formats. In this case, the MIDI interface 11 and the other MIDI device 11A are configured accordingly.

  The communication interface (I / F) 12 is connected to a wired or wireless communication network X such as a LAN, the Internet, or a telephone line, and is connected to the server computer 12A via the communication network X, and the server computer 12A. This is an interface for taking control programs or various data from the electronic musical instrument side. That is, when the control program and various data are not stored in the ROM 2 or the external storage device 10 (for example, hard disk), it is used to download the control program and various data from the server computer 12A. Such a communication interface 12 may include both of a wired interface and a wireless interface.

  In the electronic musical instrument described above, the performance operator 4A is not limited to a keyboard instrument, and may be any type of instrument such as a stringed instrument, a wind instrument, or a percussion instrument. Further, the electronic musical instrument is not limited to one in which the performance operator 4A, the display 6A, the sound source circuit 7 and the like are built in one apparatus body, but each is configured separately, and each of the electronic musical instruments is configured using communication means such as a MIDI interface or various networks. Needless to say, the apparatus may be configured to be connected. Furthermore, the performance data editing apparatus according to the present invention is not limited to the form of the electronic musical instrument as described above, and may be applied to any form of apparatus / equipment such as a personal computer, a karaoke apparatus, or a game apparatus.

  Next, a “facial expression process” for automatically adding a new musical expression to performance data will be described. FIG. 2 is a flowchart showing an example of the “expression adding process”. This process is a process executed by the CPU 1 shown in FIG. 1, and after the performance data composed of a plurality of parts to be expressed by the user is selected (in accordance with this selection operation, the corresponding performance data is read from the ROM 2 or the external storage device 10). Is read out and written into the RAM 3), the processing is started in response to the operation of the expression start switch. Hereinafter, the facial expression processing operation will be described with reference to the flowchart shown in FIG.

  First, performance data selected as a facial expression object and stored in the RAM 3 is analyzed, and a “beat totaling process” is performed for totaling each beat matching degree (variable) with a plurality of provisional beats for each part. (Step S1). Details of the “beat counting process” will be described later (see FIG. 3 described later). Based on the beat matching degree with the temporary beat for each part counted in the “beat counting process”, the temporary beat having the highest beat matching degree and the longest time length is set to “all beats”. (Step S2).

  Here, the known “beat counting process” will be briefly described with reference to FIG. FIG. 3 is a flowchart showing an example of a conventionally known “beat counting process”.

  Step S11 initializes all the beat matching degrees (variables) for tabulation prepared in advance for each temporary beat as will be described later in the RAM 3. In step S12, one temporary beat that has not yet been counted is specified from a plurality of predetermined temporary beat candidates as a temporary beat used to count the beat matching degree. Temporary beat candidates include, for example, triple sixteenth notes (80Ticks), sixteenth notes (120Ticks), dotted sixteenth notes (180Ticks), triple eighth notes (160Ticks), eighth notes ( 240Ticks), dotted eighth note (360Ticks), triple quarter note (320Ticks), quarter note (480Ticks), dotted quarter note (720Ticks), triple half note (640Ticks), half note (960Ticks) , Dotted half note (1440Ticks), triple full note (1280Ticks), full note (1920Ticks), dotted full note (2880Ticks), etc. These temporary beats are predetermined note lengths to be evaluated in order to determine an overall beat, a partial beat, and the like. In this embodiment, a gate time based on a quarter note = 480 Ticks is used. In step S13, one part that has not yet been counted is identified from among a plurality of parts as a processing target part that counts the degree of beat match. In step S14, note event data are sequentially read one by one based on the performance data of the specified processing target part. In step S15, it is determined whether or not the read note event data matches the temporary beat grid. Specifically, when the on-time of the read note event data (that is, the timing of the note-on event) is within ± the grace time of the temporary beat grid (that is, within the allowable range), the read note event data is Is matched with the temporary beat grid. Here, the temporary beat grid is, for example, the time when the on-time of the note event data based on the bar line is divided by the temporary beat and the remainder becomes “0”, that is, the time that is an integral multiple of the temporary beat. It is. The grace time is, for example, a temporary beat multiplied by “0.21”. The value of 0.21 is a numerical value obtained from the inventor's experience, but is not limited thereto.

  If it is determined in step S15 that the read note event data matches the temporary beat grid (YES in step S15), the total beat matching degree (variable) corresponding to the temporary beat is set. Count up (step S16). In step S17, it is determined whether or not all the note event data included in the performance data of the processing target part for which the beat matching degree is totaled has been processed. If it is determined that not all the note event data included in the performance data of the part to be processed is processed (NO in step S17), the process returns to step S14 and the processes from step S14 to step S16 are repeated. Execute. On the other hand, if it is determined that all the note event data included in the performance data of the processing target part has been processed (YES in step S17), it is determined whether or not the above processing has been executed for all the parts of the selected performance data. Determination is made (step S18). If it is determined that the above process has not been performed for all parts (NO in step S18), the process returns to step S13 and the processes from step S13 to step S17 are repeated. If it is determined that the above processing has been performed for all parts (YES in step S18), all temporary beats (eg, triple hex notes, sixteenth notes, dotted sixteenth notes, triple eighth notes) , Eighth note, dotted eighth note, triple quarter note, quarter note, dotted quarter note, triple half note, half note, dotted half note, triple full note, full note, dotted It is determined whether or not all the notes have been processed (step S19). If it is determined that all the temporary beats have not been processed (NO in step S19), the process returns to step S12 and the processes from step S12 to step S18 are repeated. If it is determined that all the temporary beats have been processed (YES in step S19), the process ends. As described above, from the viewpoint of simplicity of user operation, each of the performance data of all the parts is a base for obtaining the “whole beat” that is a common reference beat used when performing expression. Aggregation of the degree of beat matching with each temporary beat in the part is performed. In addition, as will be described in detail later, the degree of beat matching with each temporary beat for each part aggregated in the processing can be performed with the most suitable expression for the performance data for each part. It is also the base for finding the “partial beat” that is the reference beat.

  Returning to the description of the flowchart of FIG. 2, in step S <b> 3, one part to which facial expression is not yet applied is specified from among a plurality of parts as a processing target part to be subjected to facial expression. In step S4, the temporary beat having the highest beat matching degree and the longest time length in the processing target part is determined as the “partial beat”. In step S5, in the processing target part, the ratio between the total beat time length calculated in the “beat counting process” (see step S1 and FIG. 3) and the determined partial beat time length is far from a predetermined value. It is determined whether or not. When it is determined that the ratio of the time length of the whole beat and the time length of the partial beat is far from a predetermined value (for example, shorter than 1/2 times or longer than 2 times) (step) (YES in S5), the partial beat is selected as a reference beat to be applied to the part to be processed (step S6). On the other hand, if it is determined that the ratio between the time length of the whole beat and the time length of the partial beat is not far from the predetermined value (NO in step S5), the whole beat is selected as the reference beat to be applied to the processing target part. (Step S7). For example, if the whole beat is determined to be a quarter note, and the partial beat of a part is a full note, the time length of the full note of the partial beat is four times the quarter note of the whole beat. Since the time length ratio is far from a predetermined value (for example, twice), the whole beat as a partial beat is adopted as the reference beat applied to the part. If the partial beat of another part was a half note, the time length of the half note of the partial beat is twice the time length of the quarter note of the whole beat, and the ratio of the time lengths is less than the predetermined value. Since they are not far apart, a quarter note that is the whole beat is adopted as the reference beat applied to the part. If the partial beat of another part is an eighth note, the time length of the eighth note, which is a partial beat, is half the time length of the quarter note of the whole beat, Since the ratio is not far from a predetermined value (for example, 1/2 times), a quarter note, which is the entire beat, is adopted as the reference beat applied to the part. The whole beat or the partial beat selected as the reference beat in this way can be applied in the expression processing for well-known performance data as will be described later.

  In step S8, the selected reference beat is applied to execute expression processing for the performance data of the part to be processed. As an example of a facial expression process performed by applying the selected reference beat, there is a process for obtaining down-picking and up-picking of a chord stroke of a guitar described in JP-A-2002-319552, for example. However, in this case, it is preferable to apply an appropriate magnification to the obtained reference beat and the reference beat that is actually under the expression. For example, in the case of adding chord stroke down picking and up picking, it is preferable to apply a value obtained by doubling the obtained reference beat as a reference beat that is actually under the expression. In addition, there is a note event thinning process described in JP-A-2002-333883. In step S9, it is determined whether or not the above processing has been executed for all parts. If it is determined that the above process has not been performed for all parts (NO in step S9), the process returns to step S3 and the processes from step S3 to step S9 are repeated. If it is determined that the above process has been performed for all parts (YES in step S9), the process ends.

  In the “expression processing” (see FIG. 2), the user may be able to appropriately select either a partial beat or an overall beat as a reference beat to be applied to each part. Specifically, when it is determined that the ratio between the time length of the whole beat and the time length of the partial beat is far away (YES in step S5 in FIG. 2), for example, a “dialog” is displayed to the user. User selection processing such as prompting whether to apply a partial beat or a whole beat may be added between step S5 and step S6. When a partial beat is selected in this user selection process, the partial beat is determined as a reference beat (see step S6 in FIG. 2), and when the entire beat is selected, the entire beat is determined as a reference beat. (See step S7 in FIG. 2).

  Next, determination of a reference beat to be applied when applying facial expressions to performance data composed of a plurality of parts will be described with reference to FIG. FIG. 4 is a conceptual diagram for explaining details of determination of the reference beat. FIG. 4A shows performance data as a score for convenience. FIG. 4B shows the degree of beat matching with the temporary beat in each part. In this embodiment, a case where facial expressions are applied simultaneously to the first to third parts shown in the drawing will be described as an example. In FIG. 4 (a), the numbers given under each note indicate the on-time (sounding start time) of each note for convenience. In order to facilitate the understanding of the explanation, when the dotted note and triplet candidates are removed from the provisional beat candidates as described above to obtain the beat matching degree in each provisional beat, that is, sixteenth notes. A case where only the eighth note, the quarter note, the half note, and the whole note are candidates for the temporary beat will be described.

  First, in accordance with the “beat counting process” (see step S1 in FIG. 2 and FIG. 3), the total beat is obtained based on the performance data of the first to third parts. As can be understood from FIG. 4B, in the first part, the degree of beat matching with each provisional beat from the whole note to the sixteenth note is counted as “2”. In the second part, the degree of beat match with each temporary beat from half notes to sixteenth notes other than full notes is counted as “4”, and the degree of beat coincidence with temporary beats of all notes is counted as “2”. . In the third part, the degree of coincidence with the tentative beat of all notes is “2”, the degree of coincidence with the tentative beat of half notes is “4”, and each provisional beat from the quarter note to the sixteenth note The beat match degrees of all are counted as “7”. When totaling for each temporary beat in all of the first to third parts, the temporary beats with the highest degree of beat match are quarter notes, eighth notes, and sixteenth notes (2 + 4 + 7 = 13). Since the temporary beat with the longest time is a quarter note among these, a quarter note is determined as the whole beat (see the hatched portion of the total of all parts in the figure).

  Next, when the first part is the processing target part to be expressed, the partial beat has the highest degree of beat matching in the part (2), and the whole beat is a temporary beat having the longest time length. It is determined (refer to the shaded portion of the first part in the figure). In this first part, comparing the time length of the quarter note (480) as the whole beat and the time length of the whole note (1920) as the partial beat, the time length of the full note of the partial beat Is 4 times as long as the quarter note of the whole beat, and the ratio of time lengths is far from a predetermined value (for example, 2 times), so that the reference beat applied to the part is a partial beat All notes are adopted. In this way, for the first part in which the quarter note that is the whole beat is unconditionally determined as the reference beat in the prior art, the quarter note that is the whole beat is determined as the reference beat without determining the reference beat. All notes that are beats are determined as reference beats.

  When the second part is a processing target part to be expressed, the partial beat is determined to be a half note having the highest beat matching degree in the part (4) and the temporary beat having the longest time length. (Refer to the shaded portion in the second part in the figure). In this second part, if you compare the time length of a quarter note (480) as a whole beat and the time length of a half note (960) as a partial beat, the time length of all notes of a partial beat Is twice as long as the quarter note of the entire beat, and the ratio of time lengths is not far from the predetermined value, so the quarter note that is the whole beat is adopted as the reference beat applied to the part. Is done. In this case, the quarter note which is the whole beat is determined as the reference beat as in the conventional case.

  If the third part is the processing target part to be expressed, the partial beat is determined to be a quarter note that is the highest beat matching degree in the part (7) and the longest temporary beat. (Refer to the shaded portion in the third part in the figure). In this third part, the time length (480) of the quarter note made the whole beat and the time length (480) of the quarter note made the partial beat are the same, and the time length ratio is a predetermined value. Since it is not far apart, a quarter note which is the whole beat is adopted as the reference beat applied to the part. Also in this case, the quarter note which is the whole beat is determined as the reference beat as in the conventional case.

  As described above, when the time length of the whole beat and the time length of the partial beat are largely different from each other, the partial beat determined based only on the analysis of the performance data of the part is used as the part beat. Adopted as a standard beat to be applied to facial expression. Specifically, as described above, for each part, the time length of the whole beat is compared with the time length of the partial beat, and if the time length ratio is not far from a predetermined value, the whole beat is calculated. Apply a partial beat if the time length ratio is far from a predetermined value. In particular, as shown in FIG. 4 described above, when expression is applied to the first part by applying a quarter note, which is the entire beat, to the reference beat, Applying full notes as partial beats instead of quarter notes as full beats to the first part is effective because an appropriate expression is added.

If the performance data consists of 3 parts or more and only one part of these 3 or more parts is far from the time length of the overall beat and the time length of the partial beat compared to the other parts, it is far away. It is preferable to apply a partial beat for one part and the whole part for the other parts. For example, in the specific example shown in FIG. 4, it is considered that only the first part is far from the second part and the third part, and the first part contains all the notes that are partial beats, and the second part and the third part. For example, a quarter note as a whole beat may be arbitrarily determined as a reference beat. Further, a plurality of parts may be grouped into two or more groups, and in each group, the whole beat obtained based on the performance data of the parts included in the group may be determined as the reference beat.
Needless to say, when determining the total beat or the partial beat, the beat matching degree is counted only in a grid that fits within one measure. Further, the provisional beat grid may be determined irrespective of the measure line, not limited to determining the provisional beat grid based on the bar line, but based on the position where the beginning of the song or the time signature is specified.

1 is a hardware configuration block diagram showing an overall configuration of an electronic musical instrument to which a performance data editing apparatus according to the present invention is applied. It is a flowchart which shows one Example of a facial expression process. It is a flowchart which shows one Example of a beat total process. FIG. 4A is a conceptual diagram for explaining details of determination of a reference beat, FIG. 4A shows performance data as a score for convenience, and FIG. 4B shows a beat matching degree with a temporary beat. It is a thing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... ROM, 3 ... RAM, 4,5 ... Detection circuit, 4A ... Performance operator, 5A ... Setting operator, 6 ... Display circuit, 6A ... Display, 7 ... Sound source circuit, 8 ... Effect circuit, DESCRIPTION OF SYMBOLS 9 ... Sound system, 10 ... External storage device, 11 ... MIDI interface, 11A ... MIDI apparatus, 12 ... Communication interface, 12A ... Server computer, 1D ... Communication bus, X ... Communication network

Claims (3)

Regarding the sounding start timing of each note-on information in performance data consisting of a plurality of parts, for each of a plurality of types of note lengths, a timing that is an integral multiple of the note length or the number of notes within the permissible range is assigned to each part. Counting means for counting;
The number of notes counted for each part is totaled over all parts, and the total number of notes is compared for each note length to determine the maximum number of notes with the longest time length as the overall beat. 1 determination means;
A second determining means for comparing the number of notes counted for each part for each note length, and determining a note length that is the maximum number and the longest time length as a partial beat of each part;
For each part, selection means for selecting either the whole beat or the partial beat as a reference beat;
A performance data editing apparatus comprising a musical sound characteristic changing means for changing a musical sound characteristic so as to perform musical expression on the performance data for each part based on the selected reference beat.   The selection means compares the note length determined for the whole beat for each part with the note length determined for the partial beat, and automatically uses either the whole beat or the partial beat as a reference beat. The performance data editing apparatus according to claim 1, wherein the performance data editing apparatus is selected. On the computer,
Regarding the sounding start timing of each note-on information in performance data consisting of a plurality of parts, for each of a plurality of types of note lengths, a timing that is an integral multiple of the note length or the number of notes within the permissible range is assigned to each part. The steps to count,
Procedure for totalizing the number of notes counted for each part over all parts, comparing the total number of notes for each note length, and determining the maximum number of note lengths with the longest time length as the overall beat When,
The number of notes counted for each part is compared for each note length, and the maximum note length and the longest note length are determined as partial beats for each part;
For each part, a procedure for selecting either the whole beat or the partial beat as a reference beat;
A program for executing a procedure for changing a tone characteristic so as to perform musical expression on performance data for each part based on the selected reference beat.

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