JP2001312274A - Musical score display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To actualize an easy-to-see musical score display by automatically making playing data musical score and displaying it so that notes to be played preferably by the right hand are displayed on the treble staffs and notes to be played preferably by the left hand are displayed on the bass staffs. SOLUTION: The musical score display device which automatically notes representing a musical sound that playing data represent on the treble or bass staffs according to the pitch of the musical sound has a distribution generating means which generates a distribution of sound generation frequencies by pitches as to the musical sound that the playing data represent, a detecting means which detects the bottom between two peaks that the distribution shows according to the distribution generated by the distribution generating means, and a division point setting means which regards pitches in the mentioned bottom as division points for displaying the notes divisionally on the treble and bass staffs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical score display device, and more particularly, to a musical score display device for displaying a musical score divided into a treble staff and a bass staff.

[0002]

2. Description of the Related Art As a conventional score display device, for example, a score display device disclosed in Japanese Utility Model Publication No. 1-36231 is known.

The musical score display device disclosed in Japanese Utility Model Publication No. 1-36231 automatically converts performance data generated when a user plays an electronic keyboard instrument or the like and performance data stored in advance in a storage medium. The pitch and type of the note to be displayed are detected based on the pitch data and duration data of the musical tone indicated by the performance data, and the score is automatically generated based on the detection result. Is displayed on the screen.

When automatically displaying a musical score based on the above detection result, a treble staff and a bass staff are displayed on the display unit, and a preset pitch (for example, a third octave) is displayed. Is detected based on the pitch data, whether the pitch of the note to be displayed is a high tone or a low tone, and if the tone is a high tone, the note is referred to as a treble portion. In this case, the note is displayed on the staff, and when the note is bass, the note is displayed on the bass staff.

Therefore, according to the above-described musical score display device, the notes in the treble range, which is desirably performed by the right hand, are displayed on the treble staff (the musical score for the right hand: treble staff) by treble clef. , A piano score (grand staff) in which the notes in the lower range, which is desirable to be played with the left hand, are displayed on the bass staff (left score: bass staff)
Performance data recorded without distinction between right and left hands (MID
Performance data and standard MIDI files (Standard MIDI files) played in real time according to the I standard
File: SMF) and the like, and can be automatically created from the performance data.

[0006] However, in the above-described conventional score display device, when the notes to be displayed in the score are sorted into the high staff (right-hand music) and the low staff (left-hand music), the music is displayed in advance. Since the sound is distributed on the basis of the set pitch (for example, C sound (C3) of the third octave), for example, due to the nature of the music, a note that is originally preferably played with the right hand (for example, There is a problem that a note at the pitch of the third octave B sound (B3) may be displayed on the left-hand bass staff.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to generate a sound by playing a musical instrument by a user. When automatically displaying musical data such as performance data or performance data pre-stored in a storage medium and displaying the same, a note which is preferably preferably played with the right hand due to the nature of the music indicated by the performance data is a treble portion. On the staff
It is another object of the present invention to provide a musical score display device which realizes a musical score display which is more preferable to be played with the left hand and which can be displayed on the low staff.

[0008]

In order to achieve the above object, a musical score display apparatus according to the present invention, when creating a distribution of the number of times for each pitch for each of the musical tones indicated by performance data, sets the distribution. If the pitch located between the two mountain valleys indicated by is divided into a treble staff and a bass staff and used as a split point (division point) when displaying a note, a good score can be displayed. That is, it was made by paying attention to the experimental result by the inventor of the present application.

In other words, the musical score display device according to the present invention uses the above-described experimental results to allocate and display, to the treble staff, a musical range that is desired to be played with the right hand among the musical performance data to be displayed. Of the performance data to be displayed in the musical score, a range which is desired to be played with the left hand is assigned to the low staff and displayed, and based on the whole range indicated by the performance data, the whole range is divided into a high range and a low range. It is also determined whether or not to divide into two ranges.

That is, the musical score display device according to the present invention, when displaying musical data stored in advance, displays the number of tones for each pitch for each musical tone recorded from the beginning to the end of the musical performance data. Therefore, it is determined that a range that is suitable for playing with the right hand (a range to be displayed on the pitch staff) and a range that is suitable for playing with the left hand (a range that should be displayed on the low staff) are determined. .

Note that the number of tones for each pitch for each tone recorded from the beginning to the end of the performance data means, for example, when the performance data is generated in accordance with the MIDI standard, each note number ( Note-on (MID) for each MIDI pitch.
This is the sounding start instruction data in the I standard. ).

Further, the musical score display device according to the present invention is characterized in that the above-mentioned range suitable for playing with the right hand (the range to be displayed on the pitch staff) and the range suitable for playing with the left hand (for the low staff). To determine the range to be displayed)
From the distribution of the number of tones for each pitch for each of the musical tones recorded from the beginning to the end of the performance data, it is possible to extract the two mountain valleys indicated by the distribution as split points and play with the right hand. The appropriate range (the range to be displayed on the pitch staff) and the range to be played with the left hand (the range to be displayed on the low staff) are separated.

That is, according to the first aspect of the present invention, according to the pitch of the musical tone indicated by the performance data, the musical note indicating the musical tone is automatically sorted into a high staff or a low staff. A music score display device for generating and displaying a distribution of the number of times of tone generation for each musical tone indicated by performance data; and a distribution indicating the distribution based on the distribution generated by the distribution generating means. Detecting means for detecting a valley between two peaks, and a pitch located between two valleys of the peak indicated by the distribution detected by the detecting means,
There is provided a division point setting means for dividing the sound into a treble staff and a bass staff as a division point when displaying a note.

According to a second aspect of the present invention, in accordance with the first aspect of the present invention, the detecting means is configured to calculate a moving average value from the distribution created by the distribution creating means. It has moving average acquiring means for acquiring a distribution, and detects two mountain valleys indicated by the distribution from the distribution of the moving average value acquired by the moving average acquiring means.

According to a third aspect of the present invention, according to the pitch of the musical tone indicated by the performance data, the musical note indicating the musical tone is automatically sorted into a high staff or a low staff. Means for detecting the number of sounds for each pitch for each of the tones indicated by the performance data, and the number of sounds for the tones indicated by the performance data, based on the detection result of the detecting means. And dividing point setting means for dividing the average pitch taking into account the above into a treble staff and a bass staff to be a dividing point when displaying a note.

According to a fourth aspect of the present invention, there is provided a musical score display device for automatically displaying musical notes indicated by musical performance data on a treble staff or a bass staff. Detecting means for detecting whether or not the range of the lowest tone and the highest tone of the musical tone is within a predetermined range; and the range of the lowest and highest tone of the musical tone indicated by the performance data is determined by the detecting means. Display control means for controlling the musical note indicated by the performance data to be displayed only on one of the treble staff and the bass staff when it is detected that the performance data is within It is.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a musical score display device according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description, in order to facilitate understanding of the present invention, description of technical contents to which the prior art can be applied will be omitted, and a musical score, which is a technical content related to the implementation of the present invention, will be described. Only the process of distributing between the treble staff and the bass staff at the time of display will be described in detail.

First, FIG. 1 shows a block diagram of a musical score display device according to an embodiment of the present invention.

This musical score display device operates according to the MIDI standard, and is configured to control the entire operation using a central processing unit (CPU) 10.

The CPU 10 has a bus (BUS).
A read-only memory (ROM) 1 storing a predetermined program for controlling the overall operation via the memory 12
4 and performance data played in real time by an electronic musical instrument or the like as an external device operating in accordance with the MIDI standard, and performance data by SMF transferred from a floppy (registered trademark) disk (FD) 16 as an external recording medium. Random access memory (RAM) 18 as a working area in which an area to be executed and various registers required for execution of a program by the CPU 10 are set.
And an on / off operator for turning on / off the power of the musical score display device, a start / stop operator for instructing start / end of musical score display, and a performance data selection operator for selecting performance data to be transferred to the RAM 18. A floppy disk controller (FDC) 24 for controlling a floppy disk drive (FDD) 22 for reading performance data by SMF stored in the FD 16 and transferring the data to the RAM 18; MIDI input section 26 for inputting performance data according to the MIDI standard from an electronic musical instrument or the like and transferring the data to the RAM 18, and a treble staff with treble clef (treble staff)
Display unit 2 capable of displaying a grand staff (piano score) including both a bass staff with bass clef and a bass staff (bass staff)
8 are connected.

The display section 28 can be constituted by a liquid crystal display, a CRT, or the like.

In the above arrangement, the above-mentioned musical score display processing routine shown in FIG. 2 and the flowchart of the split point extraction processing routine which is a subroutine of the musical score display processing routine shown in FIGS. The processing executed by the display device will be described.

In the following description, a process other than the process of classifying and displaying notes to be displayed as high-pitched staffs or low-pitched staffs and displaying them (processing realized by the flowcharts shown in FIGS. 2 to 4) will be described. As for the processing related to the musical score display, the same processing as that of the conventional musical score display device may be performed, and thus the detailed description thereof will be omitted.

In this musical score display device, the operation unit 2
0 based on the operation of the performance data selection operator of FDD22.
To convert the SMF stored in the FD 16 into the RAM 18 and store the performance data in the RAM 18 or to obtain the performance data from the electronic musical instrument or the like via the MIDI input unit 26 and store the performance data in the RAM 18 by a real-time record. select.

When the start of the musical score display is instructed by the start / stop operator of the operating section 20, the musical performance data stored in the RAM 18 is read out based on the musical score flowchart shown in FIG. hand,
A musical score is displayed based on the performance data.

Here, the outline of the processing executed by the flowchart of the musical score display processing routine shown in FIG. 2 and the flowchart of the split point extraction processing routine which is a subroutine of the musical score display processing routine shown in FIGS. 3 and 4 will be described. In this case, the following processes (1) to (3) are performed depending on the flowchart.

(1) The range from the minimum value (lowest sound) to the maximum value (highest sound) of the note number obtained from the performance data is composed of 14 or less notes, that is, 14 or less types of note numbers. If it is, the musical score of the performance data is displayed on only one of the treble staff and the bass staff.

(2) If the valley between two peaks of the distribution can be extracted from the distribution of the note numbers obtained from the performance data, the valley is estimated as a section where the split point exists, and The center of the section is set as a split point, and based on the split point, the range where it is appropriate to play the performance data with the right hand (the range to be displayed on the pitch staff) and the range where it is appropriate to play with the left hand (The range to be displayed on the low-pitched staff) and the score of the performance data is displayed.

(3) If it is not possible to extract the two mountain valleys of the distribution from the note number distribution obtained from the performance data, the average sound taking into account the number of tones of the musical sound indicated by the performance data A note number indicating high is set as a split point, and based on the split point, it is appropriate to play the performance data with the right hand (the range to be displayed on the pitch staff) and to play with the left hand. The musical score of the performance data is displayed separately from the musical range (the musical range to be displayed on the bass staff).

The process of sorting and displaying the notes to be displayed on the treble staff or the bass staff based on the flowchart of the musical score display processing routine shown in FIG. 2 will now be described in detail.

First, when the start of the musical score display is instructed by the start / stop operator of the operation section 20, in step S202, the performance data of the musical piece selected as the musical score display target stored in the RAM 18 is read. From the performance data to the end of the performance data, the number of no-ons for each note number ("note-on" corresponds to the "key-press" of the keyboard of an electronic keyboard instrument. Is described as “key press count”.), And a distribution of the key press count for each note number is created.

As described above, in the MIDI standard performance data, note-on (sound start instruction data in the MIDI standard) is performed for each note number (pitch data in the MIDI standard) recorded in the performance data. Is equivalent to the number of tones generated for each pitch for each of the musical tones recorded in the performance data. This matches the “number of times of sound generation for each pitch” for each of the musical tones indicated by the data.

In the following processing, step S
An operation is performed to extract the pitch between two valleys of the note number distribution created in the process of 202 as a split point, and to distribute the performance data to the treble staff or the bass staff. .

When the process of step S202 is completed, the process proceeds to step S204, and the process proceeds to step S20.
A process of taking a moving average is performed on the distribution of the note numbers created in the process 2. In other words, there are note numbers that are not pronounced depending on the key of the music indicated by the performance data. However, such a distribution in which note numbers are omitted adversely affects the processing described later. Moving average of the number of key presses (av
rg [j]) to prevent the distribution from being omitted.

Here, the moving average value (avrg [j])
Is obtained by executing the operation expression shown in the following expression (1).

Equation (1) is: avrg [j] = notes [j] + 0.5 × (notes [j−1] + notes [j + 1]) Equation (1)

Where j = minimum note number (minimum note number = lowest note) to maximum note number (maximum note number = highest note) notes [j]: number of key presses of the j-th note number. .

When the processing in step S204 is completed, the process proceeds to step S206, in which a search for a split point is started in a section from the minimum value to the maximum value of the note number obtained from the performance data. Split point search start note number M
A is obtained by executing the arithmetic expressions shown in the following expressions (2) to (4).

Expressions (2) to (4) are as follows: sum = ｊ (j × avrg [j]) Expression (2) num = Σavrg [j] Expression (3) MA = sum / num ... Expression (4).

That is, in this embodiment, by using the weighted averaging method, an average value of note numbers is obtained while taking into account the number of key presses as a weight, and the average value is set as a split point search start note number MA. I have.

In other words, the split point search start note number MA is an average pitch in consideration of the number of times of tone generation of the musical tone indicated by the performance data.

In the process of step S206, the threshold value TH is also set by executing the operation expression shown in Expression (5).

Equation (5) is: TH = 16% of the maximum value of avrg [j]... Equation (5)

When the processing in step S206 is completed, the process proceeds to step S208, in which the range between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data is 14 or less, ie, It is determined whether the number of note numbers in the section between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data is 14 or less. In this embodiment, when playing an electronic keyboard instrument, if the range between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data is 14 or less, It is assumed that the range between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data can be played with one hand.

If it is determined in step S208 that the range between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data is not 14 or less, Proceeding to step S210, a split point extraction processing routine, which is a subroutine of the musical score display processing routine, is started and executed. In the split point extraction processing routine, a process of estimating a section where a split point exists is performed for a section between the highest note (maximum note number) and the lowest note (minimum note number) of performance data. Will be described later with reference to the flowcharts shown in FIGS.

When the process of step S210 is completed, the process proceeds to step S212, and the process proceeds to step S21.
It is determined whether the split point SP has been set in the process of 0.

If it is determined in step S212 that the split point SP could not be set in step S210, the flow advances to step S214 to change the split point search start note number MA. Forcibly set as a split point SP, and then step S216
Processing proceeds to

On the other hand, if it is determined in step S212 that the split point SP has been set in step S210,
Jump to step S216 and proceed.

In step S216, the performance data is divided into pitch staffs and bass staffs with the note number specified as the split point SP as a boundary, and the score is displayed. End the routine.

On the other hand, if it is determined in step S208 that the range between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data is 14 or less, the process proceeds to step S208. Proceeds to the process of S218, where the split point search start note number MA is C
4 ("C4" is the fourth octave of note C). It is determined whether or not the note number of the split point search start note number MA is higher than C4.

In this embodiment, as described above, the initial value is "C4 (C of the fourth octave)
Sound) ", but this initial value may be appropriately changed to a pitch suitable for the music indicated by the performance data.

In the determination processing in step S218, the split point search start note number MA is set to C
4 (“C4” is the C sound of the fourth octave), that is, if the pitch of the split point search start note number MA is higher than C4,
The process proceeds to step S220 to perform a process of displaying the musical performance on the musical staff on the pitch staff, and terminates the musical score display processing routine.

On the other hand, in the judgment processing of step S218, the split point search start note number MA is set to C
4 (“C4” is the C sound of the fourth octave) is not larger than the note number or less, that is, if the pitch of the split point search start note number MA is less than C4, the performance is performed. A process for displaying the score on the bass staff is performed, and the score display processing routine ends.

The "score display process" in steps S216, S220, and S222 is performed by calculating the pitch of the musical tone corresponding to the note-on from the note number corresponding to the note-on. Means the process of calculating the length of the musical tone corresponding to the note-on from the note-off corresponding to the note-on, and displaying the note corresponding to the note-on at an appropriate position in the musical score.

Next, the split point extraction processing in step S210 of the musical score display processing routine will be described in detail with reference to the flowchart of the split point extraction processing routine shown in FIGS.

When the split point extraction processing routine is started, first, in the processing of step S302, an upper limit value MAX of a section in which a split point is estimated to exist is set. That is, each note number is sequentially searched from the split point search start note number MA in the direction of the highest note (maximum note number) of the performance data, and the number of key presses of each note number and the threshold value T
By comparing with H, the note number of the number of times of key press exceeding the threshold value TH is set as the upper limit value MAX of the section where the split point is estimated to exist.

When the processing in step S302 is completed, the flow advances to processing in step S304 to perform processing for setting a lower limit value MIN of a section where a split point is estimated to exist. That is, each note number is sequentially searched from the split point search start note number MA toward the lowest note (minimum note number) of the performance data,
The number of key presses of each note number is compared with the threshold value TH, and the note number of the number of key presses exceeding the threshold value TH is set as the lower limit value MIN of the section in which it is estimated that a split point exists.

When the processing of step S304 is completed, the process proceeds to step S306, and the processing proceeds to step S30.
From the upper limit value MAX set in the processing of step S2, step S304
It is determined whether or not a value obtained by subtracting the lower limit value MIN set in the processing of (1) is larger than a predetermined value α.

In this embodiment, if the value obtained by subtracting the lower limit value MIN set in the processing of step S304 from the upper limit value MAX set in the processing of step S302 is larger than a predetermined value α, the upper limit value It is assumed that two valleys of the distribution of the number of times of key press for each note number created by the process of step S202 exist in the section between MAX and the lower limit value MIN.

Therefore, by performing the determination processing in step S306, it is possible to detect the valley between the two peaks in the above distribution.

Although the predetermined value α can be set to an arbitrary value, according to an experiment conducted by the present inventor, it is preferable to set “α = 1”.

If it is determined in step S306 that the value obtained by subtracting the lower limit MIN set in step S304 from the upper limit MAX set in step S302 is larger than a predetermined value α,
Proceeding to step S308, a value obtained by dividing the result of adding the upper limit value MAX set in step S302 and the lower limit value MIN set in step S304 by "2" is set as the split point SP. .

When the processing in step S308 is completed, the process returns to the musical score display processing routine.

On the other hand, in the determination processing of step S306, the upper limit MA set in the processing of step S302 is set.
Lower limit value MIN set in step S304 from X
If it is determined that the value obtained by subtracting is equal to or smaller than the predetermined value α, the process proceeds to step S310 and proceeds to step S302.
From the upper limit value MAX set in the processing in the direction of the highest note (maximum note number) of the performance data, and sequentially compares the number of key presses of each note number with the threshold value TH. The note number of the key press count equal to or less than the value TH is set as the lower limit value MIN1.

When the processing in step S310 is completed, the flow advances to step S312 to proceed to step S31.
In the process 0, it is determined whether or not the lower limit value MIN1 has been set up to the highest note (maximum note number) of the performance data.

If it is determined in step S312 that the lower limit value MIN1 has been set before reaching the highest note (maximum note number) of the performance data, the process proceeds to step S314. From the lower limit value MIN1 set in the process of S310, each note number is sequentially searched in the direction of the highest note (maximum note number) of the performance data, and the number of key presses of each note number is compared with the threshold value TH. Threshold value TH
Is set as the upper limit value MAX1.

When the processing in step S314 is completed, the flow advances to step S316 to proceed to step S31.
From the upper limit value MAX1 set in the process of step 4 to step S31
It is determined whether the value obtained by subtracting the lower limit value MIN1 set in the process of 0 is larger than a predetermined value α.

In this embodiment, if the value obtained by subtracting the lower limit value MIN1 set in the process of step S310 from the upper limit value MAX1 set in the process of step S314 is larger than a predetermined value α, the upper limit value In the section between MAX1 and the lower limit value MIN1, the distribution of the number of times of key press for each note number created by the process of step S202 is 2
It is assumed that there are two mountain valleys.

Therefore, by performing the determination processing in step S314, the valley between the two peaks in the above distribution can be detected.

Although the predetermined value α can be set to an arbitrary value, according to an experiment conducted by the inventor of the present invention, it is preferable that “α = 1”.

In the determination processing in step S316, the upper limit value MAX1 set in the processing in step S314 is used.
To the lower limit value MIN1 set in the process of step S310.
If it is determined that the value obtained by subtracting is larger than the predetermined value α, the process proceeds to step S318, and the process proceeds to step S314.
Of the addition result obtained by adding the upper limit value MAX1 set in the process of step S310 and the lower limit value MIN1 set in the process of step S310 to “2”, the split point candidate SP1
Set as

When the processing in step S318 is completed, the flow advances to step S320.

On the other hand, if it is determined in step S312 that the lower limit value MIN1 cannot be set before reaching the highest note (maximum note number) of the performance data, the process jumps to step S320. If it is determined in step S316 that the value obtained by subtracting the lower limit value MIN1 set in step S310 from the upper limit value MAX1 set in step S314 is less than or equal to a predetermined value α. Also jumps to the process of step S320 and proceeds.

In the process of step S320, each note number is sequentially searched from the lower limit value MIN set in the process of step S304 toward the lowest note (minimum note number) of the performance data. The number of key presses is compared with the threshold value TH, and the note number of the number of key presses equal to or less than the threshold value TH is set to the upper limit MA.
Set as X2.

When the process of step S320 is completed, the process proceeds to step S322, and the process proceeds to step S32.
In the process 0, it is determined whether or not the upper limit value MAX2 has been set up to the lowest note (minimum note number) of the performance data.

If it is determined in step S322 that the upper limit value MAX2 can be set before reaching the lowest note (minimum note number) of the performance data, the flow advances to step S324 to proceed to step S324. From the upper limit value MAX2 set in the processing of S314, each note number is sequentially searched in the direction of the lowest sound (minimum note number) of the performance data, and the number of key presses of each note number is compared with the threshold value TH. Threshold value TH
Is set as the lower limit value MIN2.

When the process of step S324 is completed, the process proceeds to step S326, and the process proceeds to step S32.
It is determined whether or not the lower limit value MIN2 can be set up to the lowest note (minimum note number) of the performance data in the process of step 4.

If it is determined in step S326 that the lower limit value MIN2 can be set before reaching the lowest note (minimum note number) in the performance data in step S324, the process proceeds to step S328. The process proceeds to determine whether the value obtained by subtracting the lower limit value MIN2 set in the process of step S324 from the upper limit value MAX2 set in the process of step S320 is larger than a predetermined value α.

Here, in this embodiment, if the value obtained by subtracting the lower limit value MIN2 set in the process of step S324 from the upper limit value MAX2 set in the process of step S320 is larger than a predetermined value α, the upper limit value In the section between MAX2 and the lower limit value MIN2, the distribution of the number of times of key press for each note number created by the process of step S202 is 2
It is assumed that there are two mountain valleys.

Therefore, by performing the determination processing in step S328, the valley between the two peaks in the above distribution can be detected.

Although the predetermined value α can be set to an arbitrary value, according to an experiment conducted by the inventor of the present invention, it is preferable that “α = 1”.

In the determination processing of step S328, the upper limit value MAX2 set in the processing of step S320
To the lower limit value MIN2 set in the process of step S324
If it is determined that the value obtained by subtracting is larger than the predetermined value α, the process proceeds to step S330, and the process proceeds to step S320.
The result obtained by adding the upper limit value MAX2 set in the process of step S324 and the lower limit value MIN2 set in the process of step S324 to "2" is divided by the split point candidate SP2.
Set as

When the processing in step S330 ends, the flow advances to the processing in step S332.

On the other hand, in the judgment processing of step S328, the upper limit value MAX2 set in the processing of step S320.
To the lower limit value MIN2 set in the process of step S324
Also, when it is determined that the value obtained by subtracting is equal to or smaller than the predetermined value α, the process proceeds to step S332.

Then, in the process of step S332, it is determined whether or not both the split point candidate SP1 and the split point candidate SP2 have been set.

If it is determined in step S332 that both the split point candidate SP1 and the split point candidate SP2 have been set, the process proceeds to step S334, in which the split point candidate SP1 and the split point candidate SP2 are set. Among these, the note number closer to the split point search start note number MA is set as the split point SP.

Here, two split point candidates S
Setting a note number closer to the split point search start note number MA among P1 and SP2 as the split point SP means that, when there are a plurality of valleys of split point candidates that become split points, ( In this embodiment, there are two split point candidates SP1 and SP2.)
That is, a split point candidate close to the average pitch in consideration of the number of times of sound generation is set as the split point SP.

When the processing in step S334 is completed, the process returns to the musical score display processing routine.

On the other hand, if it is determined in step S322 that the upper limit value MAX2 could not be set before reaching the lowest note (minimum note number) of the performance data, the process proceeds to step S326.
When it is determined that the lower limit value MIN2 cannot be set before reaching the lowest note (minimum note number) of the performance data, and in the determination processing of step S332, the split point candidate SP1 and the split point candidate SP2 are determined. If it is not determined that both can be set, the process proceeds to step S336.

Then, in the process of step S336, it is determined whether one of the split point candidate SP1 and the split point candidate SP2 has been set.

If it is determined in step S336 that either the split point candidate SP1 or the split point candidate SP2 has been set, the process proceeds to step S338, in which the split point candidate SP1 can be set. Split point SP
Set as

When the processing in step S338 is completed, the process returns to the musical score display processing routine.

On the other hand, if it is not determined in step S336 that either the split point candidate SP1 or the split point candidate SP2 has been set, the flow advances to step S340 to execute the split point SP. Cannot be set, and the process returns to the musical score display processing routine.

Accordingly, the distribution of the number of key presses for each note number created by the processing of step S202 is shown in FIG.
In the case of (a), the range between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data is 14 or less, ie, the highest note (maximum note number) of the performance data. Since there are 14 or less types of note numbers in the section between the (number) and the lowest note (minimum note number), the performance data is displayed only on one of the treble staff and the bass staff. (Step S20)
8 → Step S218).

FIG. 6A shows the distribution of the number of key presses for each note number created by the processing of step S202.
, The upper limit value MAX to the lower limit value M
Assuming that the value obtained by subtracting IN is larger than the predetermined value α and that the two valleys of the distribution can be detected from the distribution, the valley is estimated as a section where the split point exists, and the center of the section is determined. Is set as the split point SP (step S308 → step S308). Based on the split point SP, the performance range where it is appropriate to play the performance data with the right hand (the range to be displayed on the pitch staff) and the performance with the left hand Then, the musical score of the performance data is displayed separately from the appropriate sound range (the sound range to be displayed on the low-pitched staff).

Further, the distribution of the number of key presses for each note number created by the processing of step S202 is shown in FIG.
In the case shown in (a), it is assumed that a value obtained by subtracting the lower limit value MIN2 from the upper limit value MAX2 is larger than a predetermined value α, and that it is possible to detect the valley between two peaks of the distribution from the distribution. The valley is estimated as a section where the split point exists, and the center of the section is set as the split point SP (step S32).
8 → Step S330), the split point SP
The performance data is divided into a range suitable for playing with the right hand (the range that should be displayed on the pitch staff) and a range suitable for playing with the left hand (the range that should be displayed on the low staff). Separately, the score of the performance data is displayed.

Further, the distribution of the number of times of key press for each note number created by the process of step S202 is shown in FIG.
In the case of (a), a note indicating an average pitch in consideration of the number of tones of the musical tone indicated by the performance data is determined on the assumption that the two valleys of the distribution cannot be detected from the distribution. Split number S
P (Step S340 → Step S21)
4) On the basis of the split point, the performance range in which the performance data is suitable for playing with the right hand (the range to be displayed in the pitch staff) and the range in which the performance with the left hand is suitable (display on the low staff). And the score of the performance data is displayed separately.

Therefore, according to the musical score display device, the split points are changed in accordance with the distribution of the note numbers in the performance data. Display on the staff,
In addition, the musical score can be displayed in a state suitable for the flow of the pitch of the music, such that the notes of the low tone suitable for playing with the left hand are displayed on the low staff.

Further, according to this score display device, information indicating whether the user played with one hand or with both hands and information on which key of the keyboard the right or left hand is used as information when the user plays the electronic keyboard instrument. Even if there is no information indicating whether or not the music was played by the user, the score of the performance data of the music played by the user is divided into a treble staff and a bass staff so that it is preferable to play with the right hand and the left hand respectively. Can be displayed.

The above-described embodiment is described in the following (1).
It may be modified as shown in (8).

(1) In the above embodiment, M
The processing of performance data by the SMF according to the IDI standard and the MIDI standard has been described. However, the present invention is not limited to this, and performance data other than the MIDI standard may be handled.

(2) In the above embodiment, the case where the musical score is displayed on the display unit 20 such as a liquid crystal display or a CRT has been described. However, the musical score displayed on the display unit 20 is printed and displayed on a piece of paper by a printer or the like. You may make it.

(3) As described in the above embodiment, the present invention can be applied not only to processing of performance data recorded in advance by a user, but also to performance data stored in advance. May be applied.

(4) In the above-described embodiment, the distribution of the number of key presses for each note number is created for all the performance data of a music piece to determine the split point. However, the present invention is not limited to this. Of course, for example, for each of several measures, a distribution of the number of times of key press for each note number is created for the performance data for the several measures, and a split point is obtained for each of the measures. May be used to change the split point. Further, the unit for changing the split point is not limited to a bar, and any musical unit can be used as appropriate.For example, in a case where a musical piece is composed of a plurality of movements, It may be every movement.

(5) In the above embodiment, the threshold value TH is set to 16% of the maximum value of the moving average value (avrg [j]) of the number of key presses of each note number. However, the present invention is not limited to this. However, it is needless to say that an arbitrary value can be set.

(6) In the above embodiment, the moving average value (avrg) of the number of key presses of each note number
[J]) was determined by avrg [j] = notes [j] + 0.5 × (notes [j−1] + notes [j + 1]) Expression (1), but is not limited to this. Needless to say, any arithmetic expression may be used.

(7) In the above-described embodiment, the range between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data is 14 or less, that is, the highest tone (the highest note of the performance data). The type of note number in the section between the maximum note number) and the lowest note (minimum note number) is 14
If it is less than or equal to the kind, the musical range between the highest note (maximum note number) and the lowest note (minimum note number) of the performance data is considered to be playable with one hand, and the performance data is interpreted as a treble staff or a bass note. Although only one of the lines is displayed, the reference range is not limited to the 14 tones shown in the present embodiment, and may be an arbitrary range of 13 semitones or less. Any range of half a tone or more may be used.

(8) The above-described embodiment and the above-described modifications (1) to (7) may be appropriately combined.

[0110]

Since the present invention is constructed as described above, the performance data automatically generated by the user playing the musical instrument and the performance data stored in advance in the storage medium are automatically converted into musical scores. At the time of display, due to the nature of the music indicated by the performance data, notes that are originally preferably played with the right hand are placed on the treble staff, and notes that are preferably played with the left hand are placed on the bass staff. This makes it possible to display the musical score on a line, thereby achieving an excellent effect of making it possible to realize a more easily-viewable musical score display.

[Brief description of the drawings]

FIG. 1 is a block diagram of a musical score display device according to an example of an embodiment of the present invention.

FIG. 2 is a flowchart of a musical score display processing routine.

FIG. 3 is a flowchart of a split point extraction processing routine that is a subroutine of a musical score display processing routine.

FIG. 4 is a flowchart of a split point extraction processing routine that is a subroutine of a musical score display processing routine.

5A and 5B are explanatory diagrams showing processing contents of the musical score display device according to the present invention, wherein FIG. 5A shows the distribution of the number of key presses for each note number in performance data to be displayed as a musical score, and FIG. This is a moving average of the distribution shown in a).

6A and 6B are explanatory diagrams showing processing contents of the musical score display device according to the present invention, wherein FIG. 6A shows the distribution of the number of key presses for each note number in performance data to be displayed as a musical score, and FIG. This is a moving average of the distribution shown in a).

FIGS. 7A and 7B are explanatory diagrams showing processing contents of the musical score display device according to the present invention, wherein FIG. 7A shows the distribution of the number of key presses for each note number in performance data to be displayed as a musical score, and FIG. This is a moving average of the distribution shown in a).

8A and 8B are explanatory diagrams showing processing contents of the musical score display device according to the present invention, wherein FIG. 8A shows the distribution of the number of key presses for each note number in performance data to be displayed as a musical score, and FIG. This is a moving average of the distribution shown in a).

[Explanation of symbols]

 Reference Signs List 10 Central processing unit (CPU) 12 Bus (BUS) 14 Read only memory (ROM) 16 Floppy disk (FD) 18 Random access memory (RAM) 20 Operator unit 22 Floppy disk drive (FDD) 24 Floppy disk control (FDC) 26 MIDI input / output unit 28 Display unit

Claims (4)

[Claims] 1. According to the pitch of a musical tone indicated by performance data,
In a musical score display device for automatically distributing and displaying notes indicating the musical tone to a treble staff or a bass staff, a distribution creation for creating a distribution of the number of times of each pitch for each tone indicated by the performance data Means, based on the distribution created by the distribution creating means,
Detecting means for detecting a valley between two peaks indicated by the distribution; and a pitch detected between the two valleys indicated by the distribution detected by the detecting means, into a treble staff and a bass staff. A score display device comprising: division point setting means for setting a division point when distributing and displaying notes. 2. The score display apparatus according to claim 1, wherein said detecting means has moving average acquiring means for acquiring a distribution of moving average values from the distribution created by said distribution creating means, and wherein said moving average is obtained. A musical score display apparatus for detecting two mountain valleys indicated by the distribution from the distribution of the moving average value acquired by the acquisition means. 3. According to the pitch of a musical tone indicated by performance data,
A musical score display device for automatically distributing and displaying notes indicating the musical tones on a treble staff or a bass staff, detecting means for detecting the number of times of each pitch for each tone indicated by the performance data; On the basis of the detection result of the detection means, the average pitch taking into account the number of times the musical tone indicated by the performance data is taken into account, the dividing point when displaying the notes by dividing them into a treble staff and a bass staff. Music score display device comprising: 4. A musical score display device for automatically displaying a musical note indicated by performance data on a treble staff or a bass staff, wherein a range of a lowest note and a highest note of a tone indicated by the performance data is predetermined. Detecting means for detecting whether or not the performance data is within the range; and when the detecting means detects that the range of the lowest and highest tones of the musical sound indicated by the performance data is within a predetermined range, the performance data And a display control means for controlling the musical note indicated by (1) to be displayed only on one of the treble staff and the bass staff.