JP3746887B2 - How to display pitch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pitch display method capable of visually recognizing the pitch of a pitch, and more particularly to a pitch display method that enables pitch display based on a scale other than equal temperament.
[0002]
[Prior art]
Conventionally, a musical score is used for the display of musical scores, and the pitch display is mostly based on the musical score. In the staff notation, the pitch is expressed as shown in FIG. 7, the length of the pronunciation is indicated by the type of the note, and the higher the note is located, the higher the pitch.
Conventionally, as shown in FIG. 8, a method of expressing a pitch with a piano roll may be used. In the piano roll, the pitch is shown corresponding to the keyboard of the piano, and the higher the pitch, the higher the pitch. Moreover, in the notation by the piano roll, the horizontal axis is the time axis, and the pitch and the timing of sound generation are indicated by the black portions.
[0003]
[Problems to be solved by the invention]
The conventional pitch display methods described above are pitch display methods based on the equal temperament. The equal temperament is a temperament formed by equally dividing one octave into 12 semitones, and current general music is expressed by the above-mentioned musical notation and piano roll.
However, there are music around the world that is not based on equal temperament (ethnic music, etc.), and it is difficult to express the pitch of these music in a staff notation or piano roll. Using a staff notation, a special symbol may be added to the note to express a pitch based on a scale other than equal temperament, but even in this case, it cannot be said that the pitch can always be expressed accurately. There is a drawback that legibility is lowered.
[0004]
Moreover, although the musical score and the piano roll express information about the pitch and time (the length of pronunciation or the timing of pronunciation), it is not suitable for showing music data at a certain point in time. For example, if the number of measures is fixed, such as chord notation, and there is one chord for each measure, the rhythm only plays a fixed pattern, so detailed information about time is not important . Therefore, for this type of application, there is a demand for a pitch display method that shows the pitch at a certain point in detail.
[0005]
In view of the above, an object of the present invention is to provide a pitch display method that can also express pitches that are not based on equal temperament.
Another object of the present invention is to provide a pitch display method capable of expressing a pitch more visually than a pitch display method using a staff.
Furthermore, another object of the present invention is to provide a pitch display method capable of showing the pitch at a certain point in detail.
[0006]
[Means for Solving the Problems]
In the pitch display method of a pitch display device having a computer main body and a display, the computer main body inputs a digital music signal, and uses a specific point on the circumference as a reference pitch on the display. The pitch of the sound included in the music signal is expressed by the position on the circumference with the circumferential direction as the direction in which the pitch changes, and when the chord included in the music signal is expressed, a plurality of the chords constituting the chord This is solved by a pitch display method characterized by displaying the pitch of a sound on the circumference and connecting the intervals with lines.
[0007]
The operation of the present invention will be described below.
In the present invention, a specific point on the circumference of a circle or a specific point on an arc that is a part of a curve such as an ellipse or a sector corresponds to the reference pitch, and the pitch is determined by the position on the circumference or the arc. indicate. For example, if one circle is made to correspond to one octave, each point that divides the circle into 12 parts corresponds to a reference pitch (de les mi ...) of the scale based on the equal temperament. This makes it possible to display the pitch based on the equal temperament. Even in the case of a scale other than equal temperament, the reference pitch in the scale can be expressed by dividing the circumference according to the scale. In the present invention, the pitch of a pitch is expressed on a continuous line, so that a pitch that deviates from the reference pitch can be expressed accurately.
[0008]
For example, when the pitch of each sound constituting a chord is displayed on one circle, the relationship between the sounds is visually represented, and the chord can be easily understood. Furthermore, the pitch at a certain point can be shown in detail.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a diagram showing a pitch display method according to the first embodiment of the present invention.
In the present embodiment, the pitch is indicated by the position of a point on the circumference, each point dividing the circumference into 12 equal parts is defined as a specific point, and the position of the upper point is defined as a pitch of “do”. Then, the counterclockwise direction from the position of “do” is the direction in which the pitch increases, and one octave is represented by one round. Then, as shown in FIG. 1, the position of each point that divides the circumference into 12 parts represents the scale in the equal temperament, and each position indicated by a triangle mark in the figure is “do”, “re”, “mi”, Corresponds to each pitch of “Fa”, “So”, “La”, “Shi”. Further, the position of the circumference, that is, the pitch, is indicated by a line (indicated by a thick line with an arrow) that rotates around the center of the circle. For example, if the tip of the line points to the position shown in FIG. 2, it indicates that the pitch is slightly higher than the sound of “La”.
[0010]
FIG. 3 is a diagram showing an example in which the present embodiment is applied to a pitch display device using a computer.
This pitch display device is constituted by a general-purpose computer having a multimedia function. The general-purpose computer includes a computer main body 10, a sound board 11, a hard disk 12, a mouse 13, a keyboard 14, and a display 15, and an input terminal (for connecting a microphone 16 to the sound board 11 ( And an A / D converter (not shown) for converting the sound input from the input terminal into a digital signal.
[0011]
When sound is input from the microphone 16, the A / D converter of the sound board 11 converts the input sound into a digital signal. The computer main body 10 detects the period of the digital signal and obtains the frequency of the input sound from the result. Then, the pitch of the input sound is obtained from the frequency, and the pitch of the input sound is displayed on the display 15 as shown in FIG.
[0012]
In this pitch display device, since the pitch of the input sound is displayed by the position on the circumference, there is an advantage that a deviation from a predetermined pitch can be visually recognized. Thereby, said pitch notation apparatus can be used for tuning of a musical instrument. Further, by changing the scale around the circle, it can be applied to the display of scales other than equal temperament and the pitch of folk music. Thereby, said pitch display apparatus can be used for research etc. of folk music.
[0013]
In the above embodiment, one round of the circle is one octave. However, one round of the circle may correspond to two or three octaves. Also, in the above embodiment, the pitch is displayed by the circumference, but the pitch is displayed by the position on the arc by making a specific point on the arc of an ellipse, semicircle, etc. or an irregular curve correspond to the reference pitch. The same effect as above can be obtained.
[0014]
(Second Embodiment)
FIGS. 4A and 4B are diagrams showing a pitch display method according to the second embodiment of the present invention. In the present embodiment, as in the first embodiment, one round of the circle corresponds to one octave, and the position of each point that divides the circle into 12 equals corresponds to each pitch of the scale in the equal temperament. Then, the pitches of a plurality of sounds are represented on one circumference, and the positions on the circumference of each pitch are connected by a straight line.
[0015]
Then, for example, the C code and the D code can be expressed as shown in FIG. 4A, and the Cm code and the Dm code can be expressed as shown in FIG. 4B.
4A and 4B, it can be seen that the C code and the D code are similar to each other, and the Cm code and the Dm code are similar to each other. Also, it can be seen that the C code and the Cm code have the same two sounds and only one sound, and similarly, the D code and the Dm code have the same two sounds and only one sound.
[0016]
As described above, in the present embodiment, displaying the chords on one circumference has an advantage that the structure of the chords can be visually recognized and easily understood. It is also possible to know the pitch at a certain point in detail.
This embodiment can be applied to display of MIDI data, for example.
(Third embodiment)
FIG. 5 is a diagram showing a pitch display method according to the third embodiment of the present invention. In the present embodiment, in addition to displaying the pitch by the position on the circumference as in the first embodiment, a line indicating the position on the circumference (indicated by a bold line with an arrow in the figure) The volume is indicated by the length. That is, the longer the length of this line, the greater the volume.
[0017]
In the present embodiment, not only the pitch but also the strength of the sound can be visually recognized and can be applied to the display of MIDI data.
(Fourth embodiment)
FIG. 6 is a diagram showing a pitch display method according to the fourth embodiment of the present invention.
In the present embodiment, the pitch is represented by a position on a curve provided spirally around the center point. For example, as shown in FIG. 6, an intersection point of 12 lines (broken lines) extending radially from the origin and having an angle of 30 ° with an adjacent line and a spiral curve is used as a reference point. The counterclockwise direction is the direction in which the pitch is increased. Further, the reference point at the intersection of the straight line extending upward from the origin and the spiral curve is defined as a pitch of C (do), and each pitch of the scale based on the equal temperament is associated with each reference point. Furthermore, the pitch is indicated by a position on a curve indicated by a line (indicated by a bold line with an arrow) that rotates around the origin. Thereby, for example, in the example shown in FIG. 6, the pitch in the range of 2.5 octaves can be displayed.
[0018]
In this embodiment, in addition to the same effects as those in the first embodiment, an effect that a pitch of one octave or more can be expressed is obtained.
[0019]
【The invention's effect】
As described above, according to the present invention, a specific point on the circumference of a circle or a specific point on an arc such as an ellipse or a sector is made to correspond to the reference pitch, and the pitch is changed depending on the position on the circumference or the arc. Therefore, not only the scale based on the equal temperament but also the pitches of other scales can be displayed accurately, and can be applied to research of folk music and tuning of musical instruments.
[0020]
In addition, according to the present invention, by displaying the pitches of a plurality of sounds constituting a chord on the circumference of a circle, it is possible to visually recognize the chord and the like, and it is also possible to easily understand.
Furthermore, according to the present invention, the pitch of one or a plurality of sounds can be accurately displayed on the circumference or arc, so that the pitch at a certain point in time can be shown in detail. Therefore, it is suitable for displaying a rhythm of a fixed pattern, and can be applied to displaying a pitch in music using a computer such as MIDI.
[Brief description of the drawings]
FIG. 1 is a diagram showing a pitch display method according to a first embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of display according to the first embodiment.
FIG. 3 is a diagram showing an example in which the first embodiment is applied to a pitch display device using a computer.
FIGS. 4A and 4B are diagrams showing a pitch display method according to a second embodiment of the present invention. FIGS.
FIG. 5 is a diagram showing a pitch display method according to a third embodiment of the present invention.
FIG. 6 is a diagram showing a pitch display method according to a fourth embodiment of the present invention.
FIG. 7 is a diagram illustrating an example of a conventional pitch display method.
FIG. 8 is a diagram showing another example of a conventional pitch display method.
[Explanation of symbols]
10 Computer Main Body 11 Sound Board 12 Hard Disk 13 Mouse 14 Keyboard 15 Display 16 Microphone

Claims (2)

In a pitch display method of a pitch display device having a computer main body and a display,
The computer body inputs a digital music signal , causes a specific point on the circumference to correspond to a reference pitch on the display, and converts the circumferential direction into the music signal according to a position on the circumference with the pitch changing direction. When expressing the pitch of the included sound and expressing the chord included in the music signal, the pitch of a plurality of sounds constituting the chord is displayed on the circumference and the intervals are connected with a line. Characteristic pitch display method. In a pitch display method of a pitch display device having a computer main body and a display,
The computer body obtains the pitch and volume of the input digital signal, causes the display to correspond to a specific point on the circumference with a reference pitch, and sets the circumferential direction as the direction in which the pitch changes. A pitch display method, wherein a pitch is expressed by a position, and a volume is expressed by a length of a line from the center of a circle.

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