JPS6365159B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a chording device that automatically adds chords to a melody, which a performer would normally do intuitively. The so-called auto-chord function, which has traditionally been added to electronic organs, detects the lowest note on the keyboard of a piece of music being played by a performer, and selects that note as the tonic (first note). These methods were extremely mechanical, such as adding a chord in the major key of I, or adding a chord in the major key of a certain keyboard with that note as the first note (the C note). This causes the following disadvantages. As a simple example, when playing a song in the key of C major on a keyboard as shown in Figure 1, C major is essentially the same key on the keyboard as can be seen from the fact that there are no # or ♭ keys as key symbols. This key is played using only the white keys. Therefore, if a chord is constructed using only the white keys, with each note from ``C'' to ``B'' as the first note, the chord will be the chord relation a shown in FIG. In other words, the chords in the a-coordinate are the chords used in C major songs, and the chords in the minor key (the first and second notes are in the minor third) are also important, as shown by Dm, Em, etc. I understand that. On the other hand, in the conventional autochord function, if you try to create a major key I chord with each note from "C" to "B" as the first note, the chord for each note will be as shown in Figure 1. This results in a chord coefficient b, which satisfies only three of the chord coefficients a required for the key of C major: C, F, and G. Furthermore, in the b coefficient,
For example, the chord of D is 1st note: D, 3rd note: Hua#,
The 5th note: A, the E chord becomes the 1st note: E, the 3rd note: G#, the 5th note: B, and in C major like this,
Black key tones such as F# and G#, which are not commonly used, appear as constituent notes of the chord, giving the chord an extremely unnatural feel. For the above reasons, the conventional autochord function has low practicality as it cannot use chords other than the three main chords (C, F, G in the case of C major), and therefore it is difficult to use when adding chords other than the three main chords. Currently, chords rely on the performer's sense, but this requires advanced musical knowledge and experience, and for beginners and others who do not have advanced musical knowledge and experience, it is The attachment work was almost impossible. This invention eliminates the above-mentioned conventional drawbacks.
The purpose of this is to automatically perform the chord creation work that traditionally was performed intuitively by performers with advanced musical knowledge and experience, and to create a natural and practical chord creation process that was not possible with the auto chord function. To provide a chord setting device which enables high chord setting. This invention stores the pitch and length of one song or phrase, determines in which key the song or phrase is played, extracts the chord, and Test how well the constituent sounds between blocks (for example, one bar) match the extracted sound, and use this test result and
The chord progression is multiplied by the priority of the chord progression determined from the musical naturalness of the chord progression, and the chord with the largest multiplication result is determined as the chord of the block. Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram showing an example of a chording device according to the present invention. In this Figure 2,
Reference numeral 1 denotes a notation means consisting of a keyboard, etc., 2 a buffer memory for storing pitch and note length data for one song or one phrase, transcribed by the notation means 1, 3 all intervals stored in the buffer memory 2,
Key discrimination means 4 discriminates the tonality of a song or phrase from note length data, and numeral 4 indicates a group of chords (corresponding to chord relation a in FIG. 1) and a block (for example, 1 a constituent note compatibility testing means for testing the degree of compatibility with constituent notes in a bar);
5 is a multiplication circuit that multiplies the degree of compatibility (numerical value) calculated by the constituent note compatibility testing means 4 by a reference output from a chord priority order table 9 to be described later; 6 is a multiplication circuit that multiplies the maximum value of the output from the multiplication circuit 5; maximum chord determining means for detecting and determining the chord of the block (one bar); 7 is a latch circuit that delays the chord data determined by the maximum chord determining means 6 by one block and outputs it to the chord priority table 9; Reference numeral 8 denotes a transposition means for transposing the chord determined by the maximum chord determination means, that is, the chord processed and determined in a specific key, to the original key, and 10 stores the chord data determined by the maximum chord determination means 6. It's memory. Also, 11
12 is a display means such as a CRT that displays the pitch and note length data obtained from the score transcription means 1 as a musical score and also displays the chord names stored in the memory 10; 12 discriminates the key of the pitch data in the buffer memory 2; This is a transposition means that transposes the key to a specific key based on the KEY data from the means 3, and the data thus transposed is transmitted to the above-mentioned constituent note compatibility testing means 4.
It is now being added to Reference numeral 13 is a start terminal connected to the key determining means 3. In addition, the chord priority order table 9 includes the table -
1. Data as shown in Table 2 is digitized and stored.

【table】

[Table] In Western music, which is generally based on a 12-tone scale, it is known that when transitioning from one chord to the next, priority can be set on the next chord due to the natural flow of the melody. According to statistics from music up to the present, the order of priority is as shown in Table 1 for songs in a major key, and as shown in Table 2 for songs in a minor key. Therefore, the first
A chord priority order table is constructed by assigning the order of the next chord from grade to grade 4 to an appropriate numerical value. Next, the operation of the inventive device configured as described above will be explained. First, the note data transcribed by the transcription means 1 is
For example, it is stored in the buffer memory 2 in an 8-bit configuration, of which the lower 3 bits are used for note length data, and the following upper 4 bits are used for pitch data. In addition, tone length data is expressed in eight types from 0 to 7.
The note length data 0 to 7 are note lengths 〓, 〓/ ₃ , 〓,
Make assignments as shown in Table 3 for each of ♪/ ₃ , 〓, ♪, ♪., 〓, 〓., 〓. Table 3 shows the weighting data for each note length used for key discrimination and suitability testing, which will be described later.
It is attached as follows.

【table】

Claims (1)

[Claims] 1. A notation means consisting of a keyboard, etc., a memory means for storing pitch and note length data for one song or phrase transcribed by the operation of the notation means, and all intervals and note lengths stored in this memory means. key determining means for determining the tonality of the song or phrase from the data and transmitting key data consisting of a key chord and key/minor determination bit; and based on the key data from the key determining means, pitch data is stored in the memory means. Adaptation of the inversion means for transposing to the determined key by the key discrimination means and the extent to which the constituent tones of the individual pitch data from the memory means transposed by the inversion means are compatible with each chord of each chord system. and a chord priority system that stores the priority of chord progression determined from musical naturalness in numerical form and outputs the priority of the chord corresponding to the key based on the key data. a table; a multiplier for multiplying the priority read from the chord priority table by the compatibility calculated from the constituent note compatibility testing means; and transcribing a chord for which the multiplication result from this multiplication is maximum. A chord setting device comprising a maximum chord discriminating means for determining a chord of constituent tones.