JPH0511752A - Musical score reading device - Google Patents

Abstract

PURPOSE:To analyze a score recorded on music, as musical sound information in a performable form by recognizing the score with an automatically performable musical instrument such as an electronic instrument. CONSTITUTION:A score recorded on the grids and music of a transparent synthetic resin sheet 3, is read as a picture image by reflecting light, radiated on the music 2 from a light source 12 of a scanner 1 via the transparent synthetic resin sheet 3 having grids checking light transmission on the music 2, and receiving and detecting the reflected light with the scanner 1 moved on the music 2. Musical sound information, shown by a score read as a picture image with the scanner 1, is analyzed based on position information on the picture image with the grids, and also analyzed musical sound information is converted into a digital signal generating musical sounds. The musical sound information can be converted into the digital signal in a form easily reproduced with electronic instruments etc., from the music of a desired musical piece, and anybody can easily enjoy the automatic performance of the musical instruments.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical score reading method for inputting a musical piece to an automatically playable musical instrument such as an electronic musical instrument and analyzing the musical piece as musical tone information in a playable form.

[0002]

2. Description of the Related Art A musical score is musical tone information for playing a musical composition,
For example, the pitch of the sound, the strength of the sound, the length of the sound, the harmony, the tempo of the entire music, etc. are embodied by the code. When automatically playing a musical composition with an electronic musical instrument having a digital sound source, or a musical instrument in which an action for generating a sound is automated, musical tone information represented by a code in a musical score is a digital signal that can be recognized by the musical instrument side. Need to be converted as

There are various methods for automatically playing the electronic musical instrument as described above, and the following method is one example. (1) A method of automatically playing music on a medium such as a magnetic disk, a magnetic tape, or an optical disk using commercially available music software in which digital signals representing musical sound information are recorded. (2) A method in which a person plays an instrument having a recording / playback function, converts the performance into a digital signal, records it on a medium such as a magnetic disk, a magnetic tape, or an optical disk, and performs an automatic performance by this medium. (3) A person analyzes the music information represented by the score on the score.
(For example, note pitch, length, understanding of the meaning of various musical symbols, etc.), input the analysis result, convert it to a digital signal and record it on media such as magnetic disk, magnetic tape, optical disk, How to play automatically with this media.

[0004]

However, each of the above-described automatic playing methods has the following problems. (1) Since the music software is limited to commercially available songs, it is not possible to automatically play the desired song. (2) Although the desired music can be provided for automatic performance, it is necessary for a person to input the performance to be recorded on the medium, and unless the person who is proficient in playing the musical instrument feels free to perform the automatic performance. I can't enjoy it. (3) Although the desired music can be used for automatic performance, it is necessary for a person to analyze and input the score to be recorded on the medium, and anyone who has no musical knowledge can easily enjoy the automatic performance. Absent. It is an object of the present invention to solve these problems and provide a musical score reading method for easily and automatically playing a desired music piece.

[0005]

In order to solve the above-mentioned problems, the musical score reading method of the present invention comprises: (a) covering the musical score surface on the musical score and transmitting the light to the light transmitting surface. Place a transparent synthetic resin sheet with a grid that obstructs transmission,
Light from the light source of the scanner is radiated to the musical score through the transparent synthetic resin sheet, and the scanner is moved on the musical score to receive and detect the reflected light reflected on the musical score. And an image reading step of reading the score written on the musical score as an image, and (b) analyzing the musical tone information represented by the musical score read as an image by the scanner based on the positional information on the image by the grid, and analyzing the musical tone analyzed. It is characterized by comprising an analysis conversion step of converting information into a digital signal for generating a musical sound. Also,
The digital signal for generating the musical tone is preferably a MIDI signal.

[0006]

The light radiated from the light source of the scanner onto the musical score through the transparent synthetic resin sheet which covers the musical score and is placed on the portion of the transparent synthetic resin sheet which does not have the line forming the grid. Passes through the transparent synthetic resin sheet and reaches the musical score, and light is blocked or weakened in the portion having the lines forming the grid, and the weakened light reaches the musical score. When these lights are reflected on the musical score and the reflected light is received and detected while moving the scanner on the musical score, the score written on the grid and the musical score of the transparent synthetic resin sheet is read as one image. . The musical tone information represented by the score read as an image by this scanner is analyzed based on the positional information on the image by the grid, and the analyzed musical tone information is a digital signal, for example, a MIDI signal for playing a MIDI musical instrument. Is converted to.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of the musical score reading method of the present invention will be described with reference to the drawings. Shown in FIG. 1 is a scanner 1 for optically reading characters and figures. When the switch 11 provided on the upper surface of the scanner 1 is pressed with a finger, the LED 12 is turned on and the reading becomes possible. While pressing this switch 11, for example, in FIG.
When the roller 13 rolls on the musical score 2 through the transparent synthetic resin sheet 3 placed on the musical score 2 on which the musical score as shown in FIG. The reflected light is reflected on the musical score 2, and the reflected light is detected by an optical sensor 15 via a light receiver 14 constituted by an optical lens. The data detected by this optical sensor 15 is the cable
Image data is formed via a CPU (not shown) via 16. This image data is analyzed based on a predetermined program, and the musical tone information is converted into a digital signal that can be input to an electronic musical instrument or the like, for example, a MIDI signal.

Note that a grid of 0.5 mm is printed on the surface of the transparent synthetic resin sheet 3 placed on the musical score 2, and the line 5 (see FIG. 3) forming the grid is printed on the surface. Light does not penetrate. Therefore, the light emitted from the LED 12 of the scanner 1 is transmitted through a portion of the transparent synthetic resin sheet 3 where the lines 5 forming the grid are not printed and reflected on the surface of the musical score 2, so that the score and the grid are separated. It will be an overlapping composite image. Therefore, the distance moved by the scanner can be detected by the number of grid sections, and the positional relationship of notes, various musical symbols, etc. on the score can be accurately obtained.

Further, the composite image is subjected to predetermined image processing to obtain a section image 4 partially shown in FIG. As an example of means for obtaining such a section image 4, in the present embodiment, when the pixels that detect a light amount above a certain level occupy the majority of the pixels existing in one section of the grid, the entire section is described above. Apply the method of expressing the reflected light as white on the drawing, and if the number of pixels that detected a certain amount of light is less than half, express the entire section as black as if the reflected light was not received. did.

Next, the musical score on the section image 4 is analyzed, and is input to an electronic musical instrument having a digital sound source or a musical instrument in which an action for generating a sound is automatically inputted and a digital signal which can be automatically played. Each step of the program for converting to will be described with reference to the flow chart shown in FIG.
However, since it is difficult to represent the entire score as the section image 4 on the drawing, the description will be given based on the score described in the score 2 shown in FIG.

A: First line 20 of the 5 lines of the score (bottom line)
The positions of the left and right ends 20a, 20b of the vehicle and the position of the right end 21a of the fifth line 21 (the uppermost line) are detected, and the first line 20, that is, the left and right ends 2
It is parallel to the straight line passing through 0a and 20b and is the right end 2 of the 5th line 21 (top line).
Establish a straight line through 1a. The distance between these straight lines is 4
The equally divided distance is the distance between the five lines. B: The clef 22 at the left end of the 5th line is checked to determine the pitch of the note represented by the note. In the present embodiment, since it is a treble clef, the notes described on the second line represent the note "G" in the scale. C: The key 23 is checked to determine the key of the music. D: Examine the time signature 24 to determine the sound intensity pattern of the entire music. In this embodiment, it is 6/8. E: "Moderate", "Allegret" written on the upper left of the 5th line
The tempo of the entire song is determined by checking the speed symbol 25 such as "to", "Comodo", etc. In this embodiment, it is "Moderate" F: The note 26 and the rest note are checked in the order of progression of the song.
26 indicates the pitch of the note depending on the position of the note head 27 within the 5-line or the additional line, and whether the note head 27 is filled or not
The length of the sound is determined by the presence or absence of 28, the presence or absence of the hook 29 and the number. The rest length of the rest mark is also determined by its shape. G: Examine the presence and position of other performance-related symbols, such as dynamic symbols and change symbols. Further, the musical tone information analyzed in each of the above steps A to G is converted into a predetermined digital signal.

The tone information converted into a digital signal as described above is recorded on a predetermined medium and can be input to an electronic musical instrument or the like for automatic performance.

In this embodiment, the size of the grid is 0.5.
However, from the viewpoint of maintaining the reading resolution of the scanner 1 and the analysis accuracy of the section image 4, it is preferably within the range of 0.2 to 1.0 mm. Further, when detecting the distance on the image, a distance measuring function may be added to the roller 13 for moving the scanner 1 and the roller 13 may be used together with the position detection by the grid. However, some scanners having a distance measuring function read a figure (musical score in the present invention) as a reverse image when traveling in a direction opposite to a predetermined direction,
The image analysis program must be changed according to the scanner used.

[0014]

According to the musical score reading apparatus of the present invention, musical tone information described as musical score on a musical score of a desired musical composition can be easily converted into a digital signal which can be reproduced by an electronic musical instrument, etc. You can enjoy automatic playing of musical instruments.

[Brief description of drawings]

FIG. 1 is an explanatory diagram for explaining a musical score reading method according to the present invention.

FIG. 2 is a diagram showing a part of a musical score.

FIG. 3 is a section image in which a score and a grid are combined.

FIG. 4 is a flowchart showing a program for converting a musical score into a digital signal.

[Explanation of symbols]

1 Music score reader 2 musical score 3 Transparent synthetic resin sheet 4 section image 5 grid 11 switch 12 LED 13 Roller 14 Receiver 15 Optical sensor 16 cables 20 First Line 21 Fifth Line 22 clef 23 key signature 24 time signature 25 speed symbol 26 notes 27 note heads 28 dot 29 sign

Claims (2)

[Claims] 1. (a) A transparent synthetic resin sheet having a grid that obstructs the transmission of light is placed on the musical score, and the transparent synthetic resin sheet is placed on the light transmissive surface, and the light source of the scanner is placed through the transparent synthetic resin sheet. While irradiating light to the musical score from the music score, and moving the scanner on the musical score, the reflected light reflected on the musical score is received and detected, and the score written on the grid and the musical score of the transparent synthetic resin sheet is converted into an image. An image reading step of reading and (b) analyzing the musical tone information represented by the score read as an image by the scanner based on the positional information on the image by the grid and converting the analyzed musical tone information into a digital signal for generating a musical tone. A method for reading a musical score, which is characterized by comprising an analysis conversion step. 2. The musical score reading method according to claim 1, wherein the digital signal for generating the musical sound is a MIDI signal.