JPH0675576A - Melody generating device - Google Patents

Abstract

PURPOSE:To easily generate a new melody without requiring either sufficient knowledge of music or knowledge of computers by taking correlations between melodies. CONSTITUTION:A melody selecting part 3 which selects melodies between which correlations are desired to be taken, a melody outline generating part 4 which calculates correlations between selected melodies to generate the outline of a melody, a music rule input part 5 which inputs rules of music, and a music rule filter part 6 which generates a melody conforming to musis rules from the outline of the melody and converts it to a midi signal are provided. Melodies which correlations are desired be to taken are selected. Performed melodies or melodies extracted from musical works are used as the orrelation desired melodies. Next, correlations between selected melodies are calculated. The outline of a melody is generated by, for example, convolutional integration. Simple music rules are inputted to generate a melody conforming to music rules from the outline of the melody, and simultaneously, it is converted to the midi signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melody generator. In the field of computer music in recent years, a device that plays a fixed melody by typing data is used, but there is a demand for a device that composes while maintaining a desired music atmosphere. . However, in the field of automatic music that studies the automatic generation of melody, there are things such as those that compose based on the transition probability from sound to sound, and those that compose based on the analysis of melody development.
It was necessary for the user to have sufficient music knowledge and computer knowledge, such as performing detailed analysis of music beforehand.

Considering a melody generating device in the future,
The part actually generating the melody may be a black box for the user, and it is desired that the user can freely change the black box.

[0003]

2. Description of the Related Art Conventionally, automatic music has been tried from the very beginning in the history of computers. Hiller and Isaack
In the Iliac suite for son's string quartet,
The pitch is determined using simple melody and harmony rules derived from the counterpoint method of the 18th century. The rules used when generating a melody are such that one pitch is repeated three times or more, or a skip sound is inserted after a continuous sound. Since this "Iliac Suite", a large number of people have created automatic composition programs, but most of them build filters (rules) that give some sort of musical order on a computer and give them random signals or motifs. To generate music.

[0004]

In such conventional automatic music, it is necessary for humans to analyze the characteristics of the target music, or to program the computer to automatically perform the analysis mechanism. However, there is a problem that a new melody cannot be easily generated because it is necessary to have sufficient knowledge of music and knowledge of a computer.

The present invention has been made in view of such conventional problems, and a new melody can be easily generated without requiring sufficient knowledge of music and knowledge of a computer. An object is to provide a melody generator.

[0006]

FIG. 1 is a diagram for explaining the principle of the present invention. In FIG. 1, 3 is a melody selection unit that selects a melody to be correlated, 4 is a melody contour generation unit that calculates the correlation of the selected melody and generates a melody contour, and 5 is a music rule that inputs a rule of music. Input section,
A music rule filter unit 6 generates a melody according to a music rule from the contour of the melody and converts it into a midi signal.

[0007]

In the present invention, first, the melody to be correlated is selected. As the melody to be correlated, a melody played or a melody extracted from a musical work is used. Next, the correlation of the selected melody is calculated.
To calculate the correlation, the contour of the melody is generated, for example by performing a convolutional integration.

Then, a simple music rule is input, a melody conforming to the music rule is generated from the contour of the melody, and at the same time converted into a midi signal. In this way, since the correlation between the melodies is taken, sufficient music knowledge,
It is possible to easily create a new melody without requiring any computer knowledge.

Further, when the generated melody does not suit the taste, the correlated melody can be easily changed, so that the favorite melody can be generated.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 2 and 3 are diagrams showing an embodiment of the present invention. In FIG. 2, reference numeral 1 denotes a melody group creating unit for playing the melody, which creates a melody group used for correlation. A melody group storage unit 2 stores melody for correlation. Three
Is a melody selection unit for selecting two melody to be correlated. Reference numeral 4 denotes a melody contour generation unit, which calculates the correlation by performing convolution integration of two melody and generates a melody contour. Reference numeral 5 is a music rule input section for inputting simple music rules such as chord progressions. A music rule filter unit 6 applies a constraint such as a sound to be used in the input music rule to the contour of the melody obtained from the melody contour generation unit 4 and converts it into a MIDI signal. Reference numeral 7 denotes a sound source unit that actually turns the MIDI signal converted by the music rule filter unit 6 into a sound.

Now, assuming that the two played melodyes to be correlated are fM1 (m) and fM2 (m), convolutional integration is performed to obtain these correlations. This makes it possible to generate the contour fo (n) of the melody.

[0012]

[Equation 1]

The contour fo of the melody thus obtained
A simple music rule is input to (n) to generate a melody that follows the music rule. This is because, in order to enter a simple music rule, chord progression must be taken into consideration when composing a melody that is pleasant, except for some atonal music. For example, when a certain measure progresses with the chord of [C], the probability that the sound at the beginning of the measure is the constituent sound [C, E, G] of the chord of [C] is very high. Therefore, it is necessary to perform an operation such as correcting the sound at the beginning of the bar to the constituent sound of the closest chord from the generated result (see FIG. 3).

In this way, by holding several played melody and taking correlation between them,
It is possible to easily create a new melody without having sufficient music knowledge and computer knowledge. Next, FIG.
FIG. 7 is a diagram showing a second embodiment of the present invention. In FIG.
A melody group database section 8 stores melody of music works in the past.

Therefore, in this embodiment, by correlating the melodies extracted from the music work, sufficient knowledge of music and knowledge of a computer are not required.
New melodies can be easily generated. In addition,
Other configurations are similar to those of the first embodiment. Next, FIG.
~ FIG. 7 is a diagram showing a third embodiment of the present invention.

In FIG. 5, reference numeral 1 denotes a melody group creating section for playing a melody, which creates a melody group used for correlation. A melody group storage unit 2 stores melody for correlation. Reference numeral 3 denotes a melody selection unit for selecting several types of melody to be correlated. A melody synthesizer 9 synthesizes several kinds of melody selected by the melody selector 3. Reference numeral 10 is a basic melody input section for inputting a free melody. Reference numeral 4 denotes a melody contour generation unit, which calculates the correlation by performing convolution integration of the melody synthesized from the melody synthesis unit 9 and the melody input by the basic melody input unit 10 to generate the contour of the melody. . Reference numeral 5 is a music rule input section for inputting simple music rules such as chord progressions. Reference numeral 6 denotes a music rule filter unit, for the contour of the melody obtained from the melody contour generation unit 4,
Apply constraints such as the sounds used in the input music rules, and
Convert to IDI signal. Reference numeral 7 denotes a sound source unit that actually turns the MIDI signal converted by the music rule filter unit 6 into a sound.

Here, how to obtain the correlation in the melody contour generating section 4 will be described with reference to FIG. Now, the correlation melody 1 is fM1 (m) and the correlation melody 2 is fM2.
(M), ..., Letting the correlation melody p be fMp (m), the synthesized correlation melody fM (m) can be expressed as follows.

[0018]

[Equation 2]

It becomes If p = 1, fM
It can be written that (m) = fM1 (m). Next, the synthesized correlation melody fM (m) and the basic melody fI (m)
When the convolutional integration is performed to obtain the correlation with, the melody contour fo (n) can be generated.

[0020]

[Equation 3]

However, when n <m, the processing as shown in FIG. 7 is performed. Using this idea, fM (m) can be thought of as a kind of filter composed of the composition of the correlation melody. That is, fo (n) can be said to be the strength of the correlation between fI and fM.

In the present embodiment, some melody played is stored, a melody selected from the stored melody is generated, and correlation with a newly input free melody is performed to obtain sufficient musical knowledge. , You can easily create a new melody without any computer knowledge. Next, FIG. 8 is a diagram showing a fourth embodiment of the present invention.

In FIG. 8, reference numeral 8 denotes a melody group database section in which the melody of a past musical work is stored. Therefore, in the present embodiment, sufficient melody knowledge and computer knowledge are required by synthesizing the melody selected from the melody extracted from the music work and correlating with the newly input melody. You can easily generate a new melody without doing.

The other construction is the same as that of the third embodiment.

[0025]

As described above, according to the present invention, since the melody is correlated with each other, a new melody can be easily generated without requiring sufficient music knowledge and computer knowledge. can do.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention.

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is a diagram showing an example of a music rule.

FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is a diagram showing a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of how to take correlation.

FIG. 7 is an explanatory diagram of how to handle a correlation melody during convolutional integration.

FIG. 8 is a diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

 1: Melody group creation unit 2: Melody group storage unit 3: Melody selection unit 4: Melody contour generation unit 5: Music rule input unit 6: Music rule filter unit 7: Sound source unit 8: Melody group database unit 9: Melody synthesis unit 10: Basic melody input section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masako Nakajima 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Fujitsu Limited

Claims (4)

[Claims] 1. A melody selection section (3) for selecting a melody to be correlated with, and a melody contour generation section (4) for calculating the correlation of the selected melody to generate a melody contour.
And a music rule input section (5) for inputting music rules
And a music rule filter section (6) for generating a melody according to a music rule from the contour of the melody and converting the melody into a midi signal. 2. The melody generating apparatus according to claim 1, wherein a melody played or a melody extracted from a musical work is used as the melody having the correlation. 3. A melody selection section (3) for selecting a melody to be correlated, a melody synthesis section (9) for synthesizing the selected melody, and a basic melody input section (10) for inputting a free melody. , A melody contour generation unit (4) for calculating a correlation between the synthesized melody and a free melody to generate a melody outline, a music rule input unit (5) for inputting rules of music, and a music rule from the melody outline A melody generating apparatus comprising a music rule filter section (6) for generating a melody based on the above and converting it into a midi signal. 4. The melody generating apparatus according to claim 3, wherein a melody played or a melody extracted from a musical work is used as the melody having the correlation.