JP3087811B2 - Automatic accompaniment device for electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic accompaniment apparatus for an electronic musical instrument, and more particularly, to an automatic accompaniment apparatus for an electronic musical instrument in which the range of the chord change of the automatic accompaniment is determined by setting a reference maximum tone. It is suitable for use.

[0002]

2. Description of the Related Art Conventionally, an electronic keyboard instrument such as an electronic piano, or an electronic musical instrument such as a tone generator module having no keyboard has a so-called automatic accompaniment device. In the above-mentioned automatic accompaniment apparatus, for example, for each rhythm such as rock or waltz, reference accompaniment data (including a C measure as a reference) including pitch data representing a pitch, sounding timing data, volume data, and sounding duration data. Are often created in advance).

[0003] Then, the accompaniment data of the reference and maj
From the chord information including chord types (chord types) such as (major) and min (minor) and chords (chord roots) such as C, D, and E, pronunciation data for generating an accompaniment tone is generated. The automatic accompaniment is performed by changing the accompaniment chord according to the progress of the music.

Here, as a method of generating musical sound data for accompaniment based on the accompaniment data and the chord information, data for generating a chord is alternatively selected from a data table stored in a memory in advance. There is known a code reversal type selection process.

[0005]

The above-described chord reversal type selection processing is executed so that the range of chords produced during automatic accompaniment falls within a certain range. For this reason, there is a problem that it is impossible to cope with a case where the player wants to change the range during the performance.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to make it possible to change the range of a chord to be played by an automatic accompaniment in accordance with the strength of a player pressing a chord detection key. I do.

[0007]

According to the present invention, there is provided an automatic accompaniment apparatus for an electronic musical instrument, comprising: a detecting means for detecting a chord and a key pressing intensity from a key pressing state on a chord detecting keyboard; and a key pressing detected by the detecting means. Setting means for setting a reference maximum tone according to the intensity; selecting means for selecting a turning type of the chord in accordance with the reference maximum tone set by the setting means and the chord detected by the detection means; Generating means for generating an automatic accompaniment sound in accordance with the inversion of the chord selected by the means.

Another feature of the present invention is that
When the keystroke strength is within a certain range, the value of the reference highest tone is set to be constant, and when the keystroke strength is out of the predetermined range, the reference highest tone is changed, so that a natural flow of chord change is performed. I try to make it happen.

[0009]

Since the present invention has the above technical means, when selecting chord generation data at the time of chord detection, the reference maximum tone is selected based on the detection result of the key press intensity of the chord detection keyboard. When the key is strong, the reference maximum tone is selected high, and when the key is low, the reference maximum tone is selected low, so that the chord reversal process that allows the player to change the range during performance is possible.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic accompaniment apparatus for an electronic musical instrument according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a main configuration of an automatic accompaniment apparatus of the present invention, and FIG. 2 is a block diagram showing a main configuration of an electronic musical instrument to which the automatic accompaniment apparatus of the electronic musical instrument of the present embodiment is applied. .

As is apparent from FIG. 1, the automatic accompaniment apparatus for an electronic musical instrument according to the present embodiment comprises a keystroke intensity detecting means 10, a reference maximum sound setting means 11, a chord turning type selecting means 12, and a sound processing means 13. ing.

The key-strength detecting means 10 is provided to detect the key-strength of the keyboard 1 when a code set by operating the mode setting unit 14 is detected. The reference maximum tone setting means 11 is provided for setting a reference maximum tone of a chord based on the detection output of the key pressing strength detection means 10. These key press intensity detecting means 10 and reference maximum sound setting means 1
The operation 1 will be described later in detail.

The chord reversal type selecting means 12 is for ensuring that the range of the chord to be pronounced during the automatic accompaniment falls within a predetermined fixed range. In this embodiment, as will be described later, When the key is pressed strongly, the reference maximum tone set by the reference maximum tone setting means 11 is raised, and conversely, when the key is pressed weakly, the reference maximum tone is set low. .

As shown in FIG. 2, the electronic musical instrument of this embodiment has an operation panel 2 together with a keyboard 1, which are connected to a bus 3 via a keyboard interface 1a and a panel interface 2a.

The circuit section of the electronic musical instrument includes a data bus 3
And a microcomputer composed of a CPU 4, a RAM 5, a program memory 6, and an accompaniment pattern data memory 7, which are connected to each other.

The CPU 4 detects operation information of the keyboard 1 from a key switch circuit (not shown) coupled to the keyboard 1,
Operation information of a panel switch is detected from a panel switch circuit (not shown) coupled to the operation panel 2.

The rhythm selected by the operation panel 2, the type of musical instrument, the intonation value corresponding to the dial operation, and the like are sent from the CPU 4 to a display drive circuit (not shown).
Is displayed based on display data given to the display device 8 via the.

The CPU 4 reads out from the accompaniment pattern data memory 7 note information corresponding to keyboard operation and parameter information such as rhythm and timbre corresponding to panel switch operation, and sends them to the musical tone signal generation circuit 9.

That is, automatic accompaniment (performance) data is written in the accompaniment pattern data memory 7,
The PU 4 reads out the automatic accompaniment data corresponding to the operation of the automatic accompaniment selection button on the operation panel 2, and supplies it to the tone signal generation circuit 9. With this, along with the pronunciation corresponding to the key operation,
Automatic accompaniment chord sounds, bass sounds, drum sounds, and the like are provided to a speaker 21 via an amplifier 20 and are emitted.

Here, the code reversal type selection processing will be described. First, as shown in FIG. 5, a data table used in the code reversal type selection processing is Chord. 1 to Cho
rd. n chord generating data (Inv.1 to Iv1), each of which includes a plurality of (in this embodiment, a maximum of four) pitch data that constitute a chord, corresponding to each of the n chord types of n.
nv. m) is stored.

That is, in FIG. 5, Wn-1, Xn-
2, Yn-3, etc., the first alphabet is 1
In addition to indicating note codes such as C, D, and E in an octave, the numeral portion indicates pitch data indicating the position of the octave. For each chord type, m types of up to four notes are provided. Chord generation data (Inv.1 to I
nv. m) is stored.

More specifically, as shown in FIG. 5, for example, the code type Chord. 1 is a major (major), the chord generating data Inv. 2
As chord generation data composed of three tones C, E, and G in the same octave. Hereinafter, a plurality of chord generating data set for each chord type in this manner is referred to as a chord inversion or simply a chord inversion.

Next, a code inversion type selection process for selectively selecting a code inversion type according to the code type of the current code information from such a data table will be described with reference to the flowcharts of FIGS. Will be explained.

This chord inversion type selection processing is executed so that the range of chords to be pronounced during automatic accompaniment falls within a certain range. The player operates the above-mentioned rhythm selection switch 6 in advance. it is assumed that the input criteria best sound T ₀ of chords. 6 and FIG.
Numeral 4 denotes the highest pitched sound among the sounds constituting the inverted form of the chord by numbers.

As shown in FIG. 6, when the execution of the code reversal type selection processing of this embodiment is started, first, at step S
At 400, it is determined whether the storage of the code information in the RAM 5 (that is, the update of the code type) is the first time, and if it is the first time, the process proceeds to step S410.

Then, in step S410, from the second data map shown in FIG. 5, m inversion type Inv. Corresponding to the code type of the code information stored in the RAM 5 in the processing of the main routine. 1 to Inv. read m,
In the inverted form, those in which × 4 = T ₀ , that is,
A determination is made as to whether or not there is a chord inversion-shaped highest tone equal to the reference highest tone T ₀ specified by the player, and a result of × 4
If it is determined that there is one for which = T ₀ , the inverted form is selected and the process is terminated.

On the other hand, at step S410, × 4 = T ₀
If it is determined that there is no such sound, in a succeeding step S420, "1" is set to a counter (j) in which the value of 1 indicates the minimum pitch difference of each sound constituting the inverted form of the chord, at subsequent step S430, it is determined whether × 4 = T ₀ -j is a inversion type is present.

Then, at step S430, × 4 = T
If it is determined that there is an inversion of _0- j, the inversion is selected and the process is terminated. Conversely, × 4 =
If it is determined that there is no inverted shape of T ₀ -j, then in step S440, this time, × 4 = T ₀ +
j is determined as to whether or not the inverted shape exists, and x4 = T
If it is determined that there is an inversion of ₀ + j, the inversion is selected and the process is terminated. If it is determined in step S440 that there is no inverted shape in which × 4 = T ₀ + j, the process proceeds to step S45.
At "0", "1" is added to the counter j, and step S43 is executed.
Return to 0.

That is, steps S410 to S4
In the process of 50, from the inverted shape read at that time,
In order to select the inverted form having the smallest difference between × 4 and the reference maximum tone T ₀ , the difference between × 4 and the reference maximum tone T ₀ is 0, −1, +
.. Are searched in the order of 1, −2, +2, −3,.

On the other hand, if it is determined in step S400 that the code type has not been updated for the first time, that is, it is determined that the code type has been updated for the second time or later, the process proceeds to step S460.
The second and subsequent selection processes are executed. That is, the second and subsequent selection processes are executed as shown in FIG. First,
In step S470, the maximum tone T of the previously selected inverted shape is selected.
m-1 is equal to the reference maximum tone T ₀ (Tm-1 = T
₀ or not).

Then, in this step S470, Tm
If it is determined that −1 = T ₀ , step S48
0, and proceeds to steps S410 to S45 described above.
The processing of steps S480 to S520, which is exactly the same as the processing of step S480, is performed. That is, when Tm-1 = T ₀ ,
Just as when the code type is updated for the first time,
The difference between × 4 and the reference maximum tone T ₀ is 0, −1, +1, −2,
.. Are searched until there is an inverted form, the searched inverted form is selected, and the process is terminated.

On the other hand, at step S470, Tm-1 =
When T ₀ judged not, the process goes to step S530, Tm-1 is equal to or less than (T ₀ -3). If it is determined that Tm-1 is equal to or less than (T ₀ -3), the process proceeds to step S480, and the processes of steps S480 to S520 are executed as in the above-described case. This Tm-1, i.e., since the highest note previously selected inversion type (chord immediately preceding) is too far from the reference highest pitch T _0, in order to undo it.

If it is determined in step S530 that Tm-1 is not less than (T ₀ -3), the flow advances to step S540 to determine whether Tm-1 is smaller than T ₀ . When the Tm-1 is judged to T ₀ is less than, i.e., Tm-1 = T ₀ -1 or Tm-1,
In the case of = T ₀ -2, the process proceeds to step S550, and it is determined whether or not there is a turning shape of × 4 = Tm−1, and there is a turning shape of × 4 = Tm−1. If it is determined that the inversion is selected, the process is terminated.

This is the maximum tone Tm of the previously selected inverted type.
Since −1 is not so far from the reference maximum tone T ₀ ,
This is because if there is a turning pattern of the same highest tone, it is preferentially selected. Then, in step S550, x4
If it is determined that there is no inverted shape with Tm = Tm-1, the process moves to step S480.

On the other hand, in step S540, if the Tm-1 is determined to not less than T _0, the step S5
60 proceeds to, to determine whether a Tm-1 is (T ₀ +3) above, if it is Tm-1 is (T ₀ +3) or more, the process proceeds to step S570.

In step S570, similar to the processing in steps S410 and S480 described above,
At that time, it is determined whether or not there is an inverted form read from the second data map, in which × 4 = T ₀ ,
If it is determined that there is an object in which × 4 = T ₀ ,
The inverted shape is selected, and the process ends.

Then, at step S570, × 4 = T
If what is ₀ determines that there is no, at the next step S580, "1" is set in the counter j, and then proceeds to step S590, there are inverted form a × 4 = T ₀ + j It is determined whether or not. If it is determined in step S590 that there is a turning pattern of × 4 = T ₀ + j, the turning pattern is selected and the process ends. Conversely, if it is determined that there is no inversion of × 4 = T ₀ + j, it is determined in subsequent step S600 whether or not there is an inversion of × 4 = T ₀ −j. to decide.

In step S600, × 4 = T ₀
If it is determined that there is an inverted shape of -j, the inverted shape is selected and the process is terminated. Conversely, × 4 = T
If it is determined that there is no inverted shape of ₀₋ j,
In subsequent step S610, “1” is added to counter j, and the process returns to step S590.

On the other hand, if it is determined in step S560 that Tm-1 is not equal to or greater than (T ₀ +3),
If m−1 = T ₀ +1 or Tm−1 = T ₀ +2, the process proceeds to step S620, and it is determined whether or not there is a turning shape in which × 4 = Tm−1. = Tm-1
If there is a turning shape, the turning shape is selected and the process is terminated. Conversely, when there is no inverted type in which × 4 = Tm−1, the process proceeds to step S570.

That is, steps S560 and S6
20, the processing of steps S570 to S610
Step S530, step S550, step S48
Although the processing is similar to the processing from step S520 to step S520, the processing corresponding to step S500 and the processing corresponding to step S510 are reversed, for the following reason.

[0041] That is, step S570 and subsequent processes, since the highest tone Tm-1 of the inverted form of the previously selected is the processing of higher than the reference maximum tone T _0, the smaller the distance variation of the maximum sound Could chords to the inversion type is × 4 = T ₀ at step S570 is the case where it is determined that there was first examined whether × 4 = T ₀ + j a is inverted form is present Because it is better.

As described above, in the code reversal type selection processing, according to the code type of the code information to be updated,
The m number of inversions are read from the second data table. Then, among the read inverted shapes, the highest sound × 4 is
And so as to preferentially select the ones close to the reference highest pitch T ₀ chord input in advance by the player. As a result, the range of the pronounced chord falls within a certain range, and a more natural chord accompaniment sound can be produced.

In the code reversal type selection processing, the processing is divided into a case where the code type is updated for the first time and a case where the code type is updated after the second time. The inversion type is selected in consideration of the inversion type maximum sound.

In the conventional chord inversion processing, when data for chord generation is selected from the data table at the time of chord detection, the highest chord of the chord is equal to the previous chord or the highest chord is set to the preset reference highest chord. The closest one is selected (by setting this reference highest note, the range of the chord change of the automatic accompaniment is determined).

In addition to this, when a chord is detected, the key depression strength of the chord detection keyboard is detected, and when the key depression is strong, the reference maximum tone is raised, and when the key depression is low, the reference maximum tone is lowered (or vice versa). By doing so, the above purpose is achieved.

Also, in this embodiment, in order to realize a natural flow of chord change, the value of the reference maximum tone is usually set to be constant within a certain range of the key pressing strength, and to be outside the range. I try to change the sound.

Next, the operation of the main part of the automatic accompaniment device for an electronic musical instrument of this embodiment will be described in detail with reference to FIG. FIG.
As shown in (1), when the operation of the main routine is started, each initialization processing at the time of power-on is performed in step S1.
Next, in step S2, a switch (not shown) provided on the operation panel 2 is scanned to detect an event.

Next, the process proceeds to step S3, where the keyboard 1 is scanned. And key depression strength. Thereafter, the process proceeds to step S4, where it is determined whether or not the current operation mode is the automatic performance mode.
If the mode is not the automatic accompaniment mode, the process proceeds to step S13. If the mode is the automatic performance mode, the process proceeds to step S5. The automatic accompaniment mode is turned ON / OFF by a panel switch.

In step S5, it is determined whether or not a key is pressed on the chord detection keyboard. If the event detected in step S3 is the chord detection keyboard, the process proceeds to step S6 (normally, the lower key is used as the chord detection keyboard in the automatic accompaniment mode).

In step S6, the chord name is detected based on the pressed state of the chord detection keyboard. Then, when the code name detection in step S6 is completed, the process proceeds to step S7 to determine whether the operation mode is the reference maximum sound fluctuation mode.

If the result of determination in step S7 is that the mode is the reference maximum sound fluctuation mode, the flow advances to step S8 to perform processing for setting the reference maximum sound. The mode is turned ON / OFF by the panel switch SW. On the other hand, in step S9, a process of selecting a code reversal shape is performed, and thereafter, the process proceeds to step S10. In step S10, it is determined whether or not the automatic accompaniment is being performed. If the automatic accompaniment is being performed, the process proceeds to step S11. If the automatic accompaniment is not being performed, the process proceeds to step S13.

In step S11, accompaniment pattern data is read from the accompaniment pattern data memory 7, and tone generation data is created based on the chord expansion selected in step S9. In the next step S12, a sound generation process for sounding the data created in step S11 is performed. In the next step S13, processing such as normal keyboard sound generation is performed .

The above-described reference maximum sound setting process is performed as shown in the flowchart of FIG. That is, when the reference maximum tone setup process is started, first, the key depression intensity is determined whether the first is smaller than the threshold value V ₁ at step S41. Then, in step S41, when the key depression intensity is determined as smaller than the first threshold value V ₁ was proceeds to step S42, processing is performed to set the reference maximum sound T ₀ to a low level LOW.

[0054] Further, in step S41, the process proceeds to step S43 when the key depression intensity is determined first to be greater than the threshold value V _1, key depression strength than the second threshold value V ₂ Determine whether it is small. Then, in step S43, when the key depression intensity is determined that the second less than the threshold value V _2, the process proceeds to step S44,
It carries out a process to set the standard highest note T ₀ to a normal level NORMAL.

[0055] Further, in step S43, the key depression intensity proceeds to step S45 when it is determined to be greater than the second threshold value V _2, the process for setting the reference maximum sound T ₀ to a high level HIGH Do.

By performing such a setting, the value of the reference highest tone is set to be constant within a certain range of the key pressing strength, so that a natural flow of chord change can be normally realized. In addition, since the reference maximum tone can be changed outside the certain range of the key pressing strength, if the player wants to change the tone range during the performance, it can respond to the player's request.

[0057]

As described above, according to the present invention, a chord and a key depression intensity are detected from a key depression state on a chord detection keyboard, and a reference maximum tone is set in accordance with the detected key depression intensity. The inversion of the chord is selected according to the reference maximum tone and the detected chord, and an automatic accompaniment tone is generated according to the inversion of the chord. As a result, it is possible to perform a chord turning process that allows the player to change the range during the performance. Further, by adjusting the key pressing strength at the time of detecting the chord detection, a natural flow of chord change can be realized.

[Brief description of the drawings]

FIG. 1 is a functional configuration diagram of a main part showing an embodiment of an automatic accompaniment apparatus for an electronic musical instrument according to the present invention.

FIG. 2 is a block diagram showing a configuration of a main part of the electronic musical instrument.

FIG. 3 is a flowchart for explaining the overall operation of the embodiment.

FIG. 4 is a flowchart for explaining a procedure of a reference maximum sound setting process.

FIG. 5 is a diagram showing an example of a data table used in code reversal type selection processing.

FIG. 6 is a flowchart for explaining a procedure of a code reversal type selection process.

FIG. 7 is a flowchart for explaining the procedure of the second and subsequent selection processes in the flowchart of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Keyboard 2 Operation panel 3 Data bus 4 CPU 5 RAM 6 Program memory 7 Accompaniment pattern data memory 8 Display device 9 Musical tone signal generation circuit 10 Key press intensity detection means 11 Reference highest tone setting means 12 Code reversing type selection means 13 Sound processing means 14 Mode setting section 20 Amplifier 21 Speaker

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G10H 1/36-1/42 G10H 1/053-1/057

Claims (2)

(57) [Claims] 1. A detecting means for detecting a chord and a key pressing intensity from a key pressing state on a chord detecting keyboard; a setting means for setting a reference maximum tone according to the key pressing intensity detected by the detecting means; Selecting means for selecting a turning pattern of the chord according to the reference maximum tone set by the setting means and the chord detected by the detecting means; and an automatic accompaniment tone according to the turning pattern of the chord selected by the selecting means. An automatic accompaniment device for an electronic musical instrument, comprising: 2. The reference maximum tone of the chord is set to a constant value within a certain range where the key is depressed, and the reference maximum tone of the chord is set outside a predetermined range. 2. The automatic accompaniment device for an electronic musical instrument according to claim 1, wherein a natural flow of the chord change is realized by changing the chord change.