JPS6313555B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides automatic accompaniment for an electronic musical instrument that intermittently samples key information generated for automatic accompaniment sound generation, and generates another accompanist different from the automatic accompaniment sound based on the sampled key information. Regarding equipment. Automatic accompaniment devices for electronic musical instruments include those that automatically play chord sounds, those that automatically play bass sounds,
Devices that automatically play arpeggio sounds have been well known. Furthermore, in order to further enhance these automatic accompaniment performances, the applicant has proposed an automatic accompaniment device for electronic musical instruments that automatically plays counter melody tones (Japanese Patent Application No. 148073/1989 and 72213/1989).
However, since the above-mentioned device simply produces one note (for example, the highest note) of a chord tone continuously, the counter melody tone does not have enough change in pitch. The present invention has been made in view of the above-mentioned points, and an object of the present invention is to generate automatic accompaniment sounds such as rich counter melody sounds accompanied by pitch changes. According to this invention, key information formed and output for generating accompaniment sounds such as automatic arpeggio sounds is intermittently sampled, and other accompanist sounds such as counter melody sounds are generated based on the sampled key information. I have to. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of an automatic accompaniment device for an electronic musical instrument according to the present invention, which intermittently samples automatic arpeggio sound formation key information that is sequentially formed and output for automatic arpeggio sound formation. ,
An automatic counter melody tone is formed and produced based on the sampled key information. In this embodiment, an upper keyboard 1, a lower keyboard 2, a pedal keyboard 3
is used for manual performance, and the lower keyboard 2 is also used for automatic arpeggio note performance and/or automatic counter melody note performance. However, this only shows the case where one performance mode related to this invention is selected, and if another performance mode is selected, the usage pattern of each keyboard 1, 2, and 3 will be changed accordingly. Be changed. Note that this performance mode switching means is omitted to avoid complication of the circuit. Upper keyboard 1, lower keyboard 2 and pedal keyboard 3 are upper keyboard 1 and lower keyboard 2, respectively.
Alternatively, key information UKI, LKI, and PKI indicating the keys being pressed on the pedal keyboard 3 are generated and added to the manual performance sound forming circuit 4. Here the key information UKI,
LKI and PKI consist of signals with the number of bits corresponding to the number of keys on upper keyboard 1 (for example, 49 keys), the number of keys on lower keyboard 2 (for example, 49 keys), and the number of keys on pedal keyboard 3 (for example, 13 keys). This is a signal in which only the bit content corresponding to the pressed key becomes "1". However, this may be encoded and output as a 7-bit signal, for example. Manual performance sound formation circuit 4, added key information
Based on UKI, LKI, and PKI, a musical sound signal indicating the upper keyboard sound (melody sound), lower keyboard sound (chord sound), and pedal keyboard sound (bass sound) is formed, and this is added to the sound system 5, and the upper keyboard sound, Produce sounds as lower keyboard sounds and pedal keyboard sounds. Note that the manual performance sound forming circuit 4 can be constructed using a well-known circuit having a sound source section, an opening/closing section, a timbre imparting section, and the like. Further, key information LKI generated from the lower keyboard 2 and indicating the key being pressed on the lower keyboard 2 is also added to the automatic arpeggio sound key information forming circuit 6. The automatic arpeggio key information forming circuit 6 uses the added key information LKI.
Key information corresponding to automatic arpeggio sounds based on
AKI is formed sequentially. Formation of the key information AKI corresponding to the automatic arpeggio sound in the automatic arpeggio sound key information forming circuit 6 is based on the arpeggio pattern signal generated from the arpeggio pattern generation circuit 7.
This is performed corresponding to AP1 to AP4. Here, the arpeggio pattern generation circuit 7 generates a plurality of arpeggio patterns (for example, an up pattern, a down pattern,
(turn patterns, etc.) can be selected using arpeggio pattern select switch group 8.
When one arpeggio pattern is selected by the arpeggio pattern select switch group 8, 4-bit arpeggio pattern signals AP1 to AP4 are sequentially output in correspondence with the selected arpeggio pattern. This arpeggio pattern signal AP1~
AP4 includes the order information of the automatic arpeggio sound to be generated (information indicating the number of the note counting from the bass side), and the generation timing of the automatic arpeggio sound (corresponding to the key-on time). It shows. FIG. 2a shows an example of the arpeggio pattern signals AP1 to AP4. That is, the ranking information is included during the time t1 indicated by the dotted line, and the time t1 indicates the key-on time. Further, the time t2 corresponds to the interval between arpeggio sounds (for example, the length of an eighth note). for example,
If the key information LKI corresponds to the E2 note, G2 note, and C3 note (the subscript represents the octave), and the arpeggio pattern signals AP1 to AP4 change as shown in Figure 2a and Table 1. Then,

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Claims (1)

[Scope of Claims] 1. Automatic accompaniment key information generating means that sequentially generates key information corresponding to automatic accompaniment tones; and first musical tone forming means that forms musical tones according to the key information corresponding to the automatic accompaniment tones. , at a time interval longer than a time interval between changes in key information sequentially generated from the automatic accompaniment key information generating means,
and counter melody pattern generation means for generating a pattern signal according to a preset pattern at least once per bar; and storing key information corresponding to the automatic accompaniment tone according to the pattern signal. 1. An automatic accompaniment device for an electronic musical instrument, comprising: storage means for storing key information; and second tone formation means for forming a musical tone based on the key information stored in the storage means. 2. The automatic accompaniment device for an electronic musical instrument according to claim 1, wherein the counter melody pattern generating means generates a sampling pulse based on one pattern selected from a plurality of preset patterns. 3. The automatic accompaniment device for an electronic musical instrument according to claim 1, wherein the second musical tone generation means generates a musical tone corresponding to the key information stored in the storage means by imparting a desired timbre. 4 automatic accompaniment key information generating means for sequentially generating key information corresponding to automatic accompaniment tones; first musical tone forming means for forming musical tones according to the key information corresponding to the automatic accompaniment tones; and the automatic accompaniment key information. At a time interval longer than the time interval between changes in key information that occur sequentially from the generation means,
and counter melody pattern generation means for generating a pattern signal according to a preset pattern at least once per bar; and storing key information corresponding to the automatic accompaniment tone according to the pattern signal. and second musical tone forming means for forming a musical tone that has a predetermined interval relationship with the musical tone corresponding to the key information stored in the storage means by imparting a desired timbre. Automatic accompaniment device for electronic musical instruments.