JPH09106284A - Chord generation instruction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To instruct the generation of various types of chords similarly to an actual stringed instrument by specifying a string depression position. SOLUTION: When pitch data is inputted from a keyboard part 2, a control part 4 determines the type and root pitch of a chord according to the pitch data and a position specified through a switch part 3, and determines chord constituent sounds according to the determination result. Then an instruction is sent to a sound source 6 so as to generate musical tone signals of the determined chord constituent sounds. Therefore, the generation of different types of chords is instruced by changing the specification of the position through the switch part 3 to enable a chord musical performance which is close to that of an actual guitar, etc., and rich in expressing power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chord generation instruction device for instructing a tone signal generator such as a tone generator to generate a chord designated by a keyboard or the like with a tone color of a stringed instrument such as a guitar.

[0002]

2. Description of the Related Art Conventionally, a sound source section is instructed to determine a chord name based on pitch data input by a keyboard or the like, and to generate a constituent sound corresponding to the chord name with a tone color of a stringed instrument such as a guitar. There is an electronic musical instrument equipped with a chord generation instruction device for giving. According to this electronic musical instrument, it is possible to easily play a chord with a tone color of a guitar or the like simply by pressing a key corresponding to a desired chord name.

By the way, in stringed instruments such as guitars,
Different chords of different types can be generated by changing the position of pressing the strings (Fig. 10,
(See FIGS. 11 and 12). Guitarists usually try to change their position to perform expressive performances.

[0004]

However, in the prior art, since it is a keyboard instrument, there is no concept of changing the position of pressing a string, and only data of fixed constituent notes corresponding to the determined chord name is available. Since it does not, it can only instruct the generation of a certain type of chord. Therefore, in the above-described conventional electronic musical instrument, it is inevitable that the musical performance of an actual guitar or the like is extremely poor.

The present invention solves the above-mentioned problems of the prior art, and by specifying the position of a stringed instrument to hold down a string, it is possible to instruct the generation of various types of chords as in an actual stringed instrument. To provide a generation instruction device.

[0006]

According to a first aspect of the present invention, there is provided a chord generation instructing device, which is a chord name for determining a chord name based on input pitch data and position designating means for designating a position for pressing a string in a stringed instrument. Determining means, chord determining means for determining the type of chord to be generated and the root pitch, based on the position designated by the position designating means and the chord name determined by the chord name determining means; Based on the chord type and root pitch determined by the chord determining means, a constituent note determining means for determining a constituent note of the chord to be generated, and the generation of the constituent note of the chord determined by the constituent note determining means. And a constituent sound generation instruction means for instructing.

In the chord generation instructing device, when the position for pressing the string in the string instrument is specified by the position specifying means, the information is given to the chord determining means.
Further, when the pitch data is input, the chord name determination means determines the chord name based on the data, and the information is given to the chord determination means. The chord determining means determines the chord type and the root pitch based on these pieces of information,
These pieces of information are given to the constituent sound determining means. The constituent note determining means determines the constituent notes of the chord to be generated based on the chord type and the root pitch determined by the chord determining means, and gives the information to the constituent note generation instructing means. The constituent sound generation instructing means instructs the musical sound signal generating means such as a sound source to generate the constituent sound of the chord determined by the constituent sound determining means.

According to the chord generation instructing device, the generation of chords of various types can be instructed by changing the position designation by the position designating means. Therefore, by mounting this chord generation instruction device on an electronic keyboard instrument or the like, it becomes possible to perform a chord performance with rich expressiveness that is close to that of an actual guitar or the like.

A chord generation instruction device according to a second aspect of the invention is characterized in that the position designating means of the first aspect includes means for determining a position to be designated based on the pitch data.

According to the above arrangement, the chord name is judged by the chord name judging means based on the inputted pitch data, the position to be specified is decided by the position specifying means, and these pieces of information are decided by the chord. Given to the means. In this way, by automatically designating the position based on the pitch data, it is possible to save the labor of inputting the position.

In the chord generation instruction device according to a third aspect of the present invention, when the position designation means of the second aspect inputs a plurality of pitch data, the position is designated based on the lowest pitch data. It has a feature.

The lowest pitch among the pitches forming a chord often corresponds to the root pitch of the chord. Therefore, when a plurality of pitch data is input, an appropriate position can be automatically specified by designating the position based on the lowest pitch data.

The chord generation instructing device according to claim 4 is characterized in that the chord name judging means judges the chord name based on the pitch data input by the keyboard connected to the outside.

According to the above construction, the chord performance by the tone color of the guitar or the like can be easily performed only by pressing the key corresponding to the desired chord name.

[0015]

DETAILED DESCRIPTION OF THE INVENTION An example of an embodiment of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a block diagram showing an example of the arrangement of an electronic keyboard instrument having a chord performance instruction device according to the present invention. As shown in FIG. 1, the electronic keyboard instrument 1 includes a keyboard section 2, a switch section 3, and a control section (CPU).
4, a storage unit (ROM) 5, a sound source 6, a D / A converter 7, an amplifier 8, and a speaker 9 constitute a main part.

The keyboard section 2 is composed of a 61-key keyboard and a detection circuit for detecting a key-pressed state of each key. When a key is pressed,
Information of the key number and key depression speed for designating the pitch of the musical tone to be generated is input to the control unit 4.

The switch section 3 includes the basic switches of a general electronic keyboard instrument such as a power switch, a volume control switch, and a mode selection switch, as well as position specifying switches 10A to 10E and a reverse switch 11 shown in FIG. , And a guitar chord switch 12.

Position designation switches 10A to 10E
Is for designating a position (position) at which a string is pressed when playing a chord on the guitar, and switches 10A to 10E correspond to the positions closer to the head of the guitar in order. For example, when switch 10A is pressed, position A closest to the head of the guitar
When the position designation switch 10E is pressed (see FIGS. 10 (a) and 11 (a)), the position E (see FIGS. 10 (e) and 11 (e)) is designated. It has become.

The reverse switch 11 is for switching down-picking (forward play) and up-picking (reverse play) of the guitar, and when this switch is in the ON state, it switches from the high tone side to the low tone side of the chord constituent tones. Sound generation processing is performed in order, and when in the off state, sound generation processing is performed in order from the low tone side to the high tone side of the chord constituent tones.

The guitar chord switch 12 is for switching between a normal mode for producing a sound of a normal keyboard performance and a guitar mode for producing a chord sound by a guitar tone color.
When this switch is on, it is set to guitar mode, and when it is off, it is set to normal mode.

The storage unit 5 stores various programs executed by the control unit 4 and various data. The various programs include a program for performing normal tone processing as an electronic keyboard instrument, a program for determining a chord name based on pitch data designated by the keyboard section 2, and a chord playing process. Programs.
Positions (A to B) and chord names (C
To B) and the chord types and the root pitches (see FIG. 5), and the chord types and the pitches of the constituent notes (see FIG. 6).

The control section 4 executes the program read from the storage section 5 to generate musical tone data corresponding to the data supplied from the keyboard section 2 and the switch section 3,
This is output to the sound source 6. The control unit 4 is provided with a program counter and various registers for temporarily storing data necessary for executing the program. The various registers temporarily store the number of the depressed key. There are a register for storing and a register for temporarily storing the operation states of various switches.

The sound source 6 has an internal waveform memory (PCMRO).
M), and musical tone data (pitch, pitch,
The tone data is read from the waveform memory in accordance with the tone color), and a digital tone signal is generated based on the read data.
It is configured to output to the converter 7.

The D / A converter 7 is configured to convert the digital musical tone signal from the sound source 6 into an analog musical tone signal and output it to the amplifier 8. And the D / A converter 7
The musical tone signal from is amplified by the amplifier 8 and sent to the speaker 7, whereby musical tone is generated.

Next, the processing operation of the control unit 4 will be described with reference to the flow charts of FIGS.

When the power of the electronic keyboard instrument 1 is turned on,
As shown in FIG. 3, first, initial processing (step S101)
Then, various registers and flags are initialized.

When the initial processing is completed, next, the various switches provided on the electronic keyboard instrument 1 are scanned to capture the operation state of each switch, and the processing corresponding to each state is performed (step S102).

When this switch processing is completed, key processing (step S103) is performed, and then step S102.
Return to and repeat the same processing.

In the key processing, as shown in FIG. 4, first, each key of the keyboard section 2 is scanned (step S201), and it is determined whether or not there is a newly pressed key (step S).
102). When it is determined that the key is newly pressed, the ON / OFF state of the guitar chord switch 12 is checked to determine whether or not the guitar mode is currently set (step S203).

If the guitar mode is not currently set, the normal tone generation process of the keyboard instrument is performed according to the number of the newly pressed key and the key pressing speed (step S204). If it is determined in step S202 that no new key has been pressed, it is determined whether or not there is a released key among the depressed keys (step S211). If there is a key release process, the key release process for stopping the generation of the tone corresponding to the key number is performed (step S212). If there is no released key, the tone generation process is continued.

If it is determined in step S203 that the guitar mode is currently set, the keyboard section 2
A process for determining the chord name is performed based on the pitch data input more (step S205). Here, the chord name is determined uniformly corresponding to the pitch name of the key regardless of the octave position of the depressed key.

Next, the position designation switches 10A-1
Position specified by 0E and step S20
A process of determining the chord type and the root pitch according to the chord name determined in 5 is performed (step S206). The determination process here is performed by referring to the table of FIG. For example, if the position is A and the chord name is C,
The chord type is determined to be 1, and the root pitch is determined to be C3. Further, for example, when the position is D and the chord name is G #, the chord type is determined to be 1 and the root pitch is determined to be G2 #.

Next, based on the chord type and the root pitch determined in step S206, the pitch of each constituent note of the chord to be generated is determined (step S207). In the process of determining each constituent note of the chord, the pitch of each constituent note of each type shown in FIG. 6 is shifted by the difference between the root pitch when the chord name is C and the determined root pitch. It is done by For example,
When the chord type is determined to be 5 and the root pitch is determined to be D3, the pitches C3 and G of the constituent notes in the type 5 of FIG.
3, C4, and E4 are shifted by the difference between the pitch C and the pitch D3, that is, twice. In this case, the pitches of the constituent notes of the chord are determined to be D3, A3, D4, F4 #.

When the pitch of each constituent note of the chord to be generated is determined by the above processing, it is then determined whether or not the reverse switch 11 is turned on (step S20).
8). When the reverse switch 11 is turned on, the sound source 6 is sequentially generated so that the musical tone signal of the guitar tone color is sequentially generated from the treble-side constituent sound at predetermined pitches by shifting the sounding timing by a predetermined time. Give instructions (step S2)
09, see FIG. 7 (b). As a result, chords corresponding to the uppicking style of the guitar are generated. Also,
When the reverse switch 11 is off, the sound source 6 is instructed to sequentially generate the musical tone signal of the guitar tone color by shifting the sound generation timing from the low-pitched constituent sound by a predetermined time at the determined pitch of each constituent sound. Give (step S210, FIG. 7)
(A)). As a result, a chord corresponding to the down picking performance of the guitar is generated.

According to the electronic keyboard instrument 1 which operates as described above, various types of chords can be generated with the guitar tone color by changing the designation of the position by the position designation switches 10A to 10E. Therefore, it becomes possible to perform chord performance with rich expressiveness that is close to that of an actual guitar or the like.

[Second Embodiment] Next, a second embodiment of the present invention will be described. In this embodiment, instead of designating the position by the position designating switches 10A to 10E, a program and data stored in the storage unit 5 so that the position can be designated automatically based on the pitch data designated by the keyboard unit 2. Is partly modified. Therefore, the overall device configuration of the electronic keyboard instrument 1 and the main processing (FIG. 3) in the control unit 4 can be the same as those in the first embodiment, and therefore the key processing operation in the control unit 4 will be described here. Only explained.

FIG. 8 shows the contents of the key processing in the second embodiment. First, each key of the keyboard section 2 is scanned (step S301) to judge whether or not there is a new key depression. (Step S302). When it is determined that a new key is pressed, the on / off state of the guitar chord switch 12 is checked to determine whether or not the guitar mode is currently set (step S303).

If the guitar mode is not currently set, the normal tone generation processing of the keyboard instrument is performed according to the key number and the key depression speed of the newly depressed key (step S304). If it is determined in step S302 that a new key has not been pressed, it is determined whether or not there is a released key among the keys that have been pressed (step S311), and the key is released. If there is a key that has been locked, a key release process is performed to stop the generation of the musical sound corresponding to that key number (step S312). If there is no key that has been released, the sound generation process is continued.

If it is determined in step S303 that the guitar mode is currently set, the keyboard section 2
A process for determining the chord name is performed based on the pitch data specified by the pitch data (step S305). Here, the chord name is determined uniformly corresponding to the pitch name of the key regardless of the octave position of the depressed key.

Subsequently, processing for determining the position is performed based on the pitch data designated by the keyboard section 2 (step S306). Here, based on the correspondence relationship between the pitch range and the position shown in FIG. 9, the position is determined depending on which octave region the pitch data of the lowest pitch data of the designated pitch data corresponds to. Is determined. That is, in this example, when a plurality of keys are pressed, the position is determined depending on which octave region of the keyboard the lowest-pitched key is.

Next, a process of determining the chord type and the root pitch according to the position determined in step S306 and the chord name determined in step S305 is performed (step S307). The determination process here is performed by referring to the data in FIG. 5, as in the case of the first embodiment.

Then, based on the chord type and the root pitch determined in step S307, the pitch of each constituent note of the chord to be generated is determined (step S308). As in the case of the first embodiment, the process of determining each constituent sound of the chord here is also based on the pitch of each type of constituent sound when the chord name is C shown in FIG. Is done by shifting by the same degree.

When the pitches of the constituent tones of the chord to be generated are determined by the above processing, it is then determined whether or not the reverse switch 11 is turned on (step S30).
9). When the reverse switch 11 is turned on, the sound source 6 is generated so as to sequentially generate musical tone signals of the guitar timbre at the determined pitches of the constituent tones from the treble-side constituent tones at a predetermined timing. Give instructions (step S3)
10, FIG. 7B). As a result, chords corresponding to the uppicking style of the guitar are generated. Also,
When the reverse switch 11 is off, the sound source 6 is instructed to sequentially generate the musical tone signal of the guitar tone color by shifting the sound generation timing from the low-pitched constituent sound by a predetermined time at the determined pitch of each constituent sound. Give (step S311, FIG. 7)
(A)). As a result, a chord corresponding to the down picking performance of the guitar is generated.

In the electronic keyboard instrument 1 of the second embodiment which operates as described above, when pitch data is input from the keyboard section 2, the chord name is determined based on the pitch data, and The position to be designated is determined, and subsequent processing is performed based on these. In this way, by automatically designating the position based on the pitch data, it is possible to save the labor of inputting the position. Also, position specification switch 1
Since 0A to 10E can be omitted, the device configuration can be simplified as compared with the first embodiment.

In the above embodiments, the case where the chord generation instruction device is mounted on the electronic keyboard instrument has been described as an example, but the present invention is not limited to this.

For example, the chord generation instruction device itself may not have a keyboard but may have a device configuration in which pitch data is input by an externally connected keyboard. The means for inputting pitch data from the outside does not necessarily have to be a keyboard, but may be a stringed instrument such as an electric guitar, for example.

Furthermore, a so-called DTM (Desk) is used for composing and playing on a desk using a personal computer.
It is also applicable to the chord generation instructing device of the Top Music system.

[0049]

According to the present invention, the following excellent effects can be exhibited. According to the first aspect of the present invention, by changing the designation of the position of the pressed string in the stringed instrument by the position designating means, it is possible to instruct the generation of various types of chords, and the expression power close to that of an actual guitar is provided. Can play chords.

According to the invention described in claim 2, when the pitch data is inputted, the chord name is judged by the chord name judging means based on the data, and the position to be specified by the position specifying means is determined. Since it is decided and these pieces of information are given to the chord decision means, it is possible to save the trouble of inputting for the position designation.

According to the third aspect of the invention, when a plurality of pitch data is input, an appropriate position is automatically designated based on the pitch data of the lowest pitch.

According to the fourth aspect of the present invention, the chord performance by the tone color of the guitar or the like can be easily performed only by pressing the key corresponding to the desired chord name.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of an electronic musical instrument including a chord generation instruction device of the present invention.

FIG. 2 is a view showing the arrangement of various switches of the electronic musical instrument of the above.

FIG. 3 is a flowchart showing the contents of main processing in the control unit of the electronic musical instrument.

FIG. 4 is a flowchart showing the contents of key processing in the control unit of the electronic musical instrument.

FIG. 5 is a table showing the relationship between position and chord name, chord type and root pitch.

FIG. 6 is a diagram showing a correspondence relationship (in the case of chord C) between chord types and pitches of constituent tones.

FIG. 7 is a diagram showing sound generation timings of chord constituent tones (in the case of chord C) in the case of a normal order performance and the case of a reverse order performance.

FIG. 8 is a flowchart showing the contents of key processing in a control unit of the second embodiment example.

FIG. 9 is a table showing a correspondence relationship between pitches and positions in the second embodiment example.

FIG. 10 is a diagram showing how to hold down a string at each position when a chord C is generated in a guitar.

FIG. 11 is a diagram showing how to hold down the strings at each position when the chord D is generated in the guitar.

FIG. 12 is a diagram showing how to hold down a string in a guitar for each chord type.

[Explanation of symbols]

1 electronic keyboard musical instrument provided with a chord generation instruction device 2 keyboard section (pitch data input means) 3 switch section (position designation means) 4 control section (CPU, chord name determination means, chord determination means,
Component sound deciding means, component sound generation instructing means 5 Storage unit (ROM) 6 Sound source 7 D / A converter 8 Amplifier 9 Speaker 10A to 10E Position designation switch 11 Reverse switch 12 Guitar chord switch

Claims (4)

[Claims] 1. A position designating means for designating a position of a pressed string in a stringed instrument, a chord name determining means for determining a chord name based on inputted pitch data, a position designated by the position designating means and the chord. Based on the chord name determined by the name determination means, the chord determination means for determining the chord type and the root pitch, and based on the chord type and the root pitch determined by the chord determination means, A chord generation instruction having a constituent sound determination means for deciding a constituent sound of a chord to be generated and a constituent sound generation instruction means for instructing generation of the constituent sound of the chord determined by the constituent sound determination means. apparatus. 2. The chord generation instruction device according to claim 1, wherein the position designation means determines a position to be designated based on the pitch data. 3. The position designating means designates the position based on the pitch data of the lowest pitch when a plurality of pitch data is input.
The described chord generation instruction device. 4. The chord generation instructing device according to claim 1, wherein said chord name judging means judges the chord name based on pitch data input by a keyboard connected to the outside.