JP2014134598A - Electronic string instrument, musical tone generation method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a sound impression by enabling quick change of musical tones in an electronic string instrument.SOLUTION: An electronic string instrument includes: a fret switch group 22 that has a pressure detection area and detects which position of the pressure detection area has been pressed; first and second picking sensors 23, 24 that have each plural strings and detects which of the plural strings has been picked; a first sound generation circuit 19 for instructing sound generation, to a connected external sound source 30, the sound generation of a musical tone of a pitch specified by a pressing position detected by the fret switch group 22 and a string on which the picking has been detected by the first picking sensor 23 at a timing the picking has been detected by the first picking sensor 23; and a CPU 11 for controlling the connected sound source when a picking is detected by the second picking sensor 24.

Description

  The present invention relates to an electronic stringed instrument, a musical sound generation method, and a program.

  Conventionally, when a string operation (picking operation) is performed on a string, an electronic string instrument has a string trigger signal detected by a string trigger pickup, an on / off state of a fret switch that specifies a pitch, and a tone color. On the basis of the on / off state of the switches such as the selection switch group, the sound generation control for the tone generation circuit and the like is executed. Some of these conventional electronic stringed musical instruments can change the timbre etc. generated by the string operation by switching the on / off state of switches such as a timbre selection switch group (for example, patents). Reference 1).

Japanese Patent Publication No. 7-82330

  However, since the conventional techniques including Patent Document 1 simulate a live string instrument, there is only one portion that plays a string and produces a sound. For this reason, the user has to operate a timbre selection switch group and the like separately from the string operation when tuning switching or changing the timbre. For this reason, it was not possible to change the tone such as quick tuning switching and tone.

  The present invention has been made in view of such a situation, and an object of the present invention is to quickly change a musical tone and improve sound expression in an electronic stringed instrument.

In order to achieve the above object, an electronic stringed musical instrument according to one aspect of the present invention is provided.
A pressure detection means having a pressure detection area and detecting which position of the pressure detection area is pressed;
A plurality of string detecting means each having a plurality of strings and detecting that one of the plurality of strings has been played;
The string is detected by the pressing position detected by the pressing detection means and the specific string detecting means at the timing when the string is detected by the specific string detecting means among the plurality of string detecting means. First sound generation instruction means for instructing a connected sound source to generate a musical tone having a pitch specified by a string;
Sound source control means for controlling the connected sound source when a string is detected by a string detection means different from the specific string detection means;
Have

  ADVANTAGE OF THE INVENTION According to this invention, in an electronic stringed instrument, a musical tone can be changed rapidly and the expressive power of a sound can be improved.

It is a top view which shows the external appearance structure of the electronic stringed instrument which concerns on embodiment of this invention. It is a block diagram which shows the structure of the hardware of an electronic stringed instrument. It is a flowchart explaining the flow of a main process. It is a flowchart explaining the flow of a basic mode sound generation process. It is a flowchart explaining the flow of a continuous sound mode sound generation process. It is a flowchart explaining the flow of a vibration sound mode sound generation process.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing an external configuration of an electronic stringed instrument 1 according to an embodiment of the present invention.

The electronic stringed instrument 1 is an electronic stringed instrument that improves the operability of live stringed instruments such as guitars and violins.
In a live string instrument, a string length that repeats amplitude is specified by pressing a string against a fingerboard by a player's finger, and a sound frequency is determined. On the other hand, the electronic stringed instrument 1 includes, for example, a touch panel that detects pressing of an object at a portion corresponding to the fingerboard, and determines the pitch by detecting the position of pressing.
Further, the electronic stringed instrument 1 includes a picking sensor having a cable-shaped sensor serving as a string as a member corresponding to a portion that plays a string in a live stringed instrument.

The electronic stringed instrument 1 includes a main body portion 2 and a fret portion 3.
The main body 2 constitutes a housing of the electronic stringed instrument 1. The main body unit 2 is provided with a control switch group 21, a first picking sensor 23, and a second picking sensor 24.

  The control switch group 21 has a plurality of button switches, and the mode of a musical tone generated by the electronic stringed instrument 1 is changed by operating each button switch. There are multiple types of musical sound modes, and details of each mode will be described later.

  Each of the first picking sensor 23 and the second picking sensor 24 has a plurality of strings (for example, four strings), and a plurality of bullets for detecting that any of the plurality of strings has been played. It functions as a string detection means. Each of the first picking sensor 23 and the second picking sensor 24 includes a pickup for each string and individually detects string vibration.

  The fret unit 3 is provided with, for example, a fret switch group 22 composed of a touch panel. The fret switch group 22 has a matrix-shaped press detection area corresponding to the fret and the string, and functions as a press detection unit that detects which position in the press detection area is pressed.

  2 shows a basic mode sound generation process described with reference to FIG. 4 described later, a continuous sound mode sound generation process described with reference to FIG. 5 described later, and a vibration sound mode sound generation process described with reference to FIG. 6 described later. It is a block diagram which shows the structure of the hardware of the electronic stringed musical instrument 1 which can perform.

  The electronic stringed instrument 1 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a bus 14, an input / output interface 15, a switch detection circuit 16, and a fret detection. Circuit 17, A / D conversion circuit 18, first sounding circuit 19, second sounding circuit 20, control switch group 21, fret switch group 22, first picking sensor 23, second picking sensor A sensor 24, an addition circuit 25, and a D / A conversion circuit 26 are provided.

  The CPU 11 executes various processes according to a program recorded in the ROM 12 or a program loaded into the RAM 13 from a storage unit (not shown).

  The RAM 13 appropriately stores data necessary for the CPU 11 to execute various processes.

  The CPU 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output interface 15 is also connected to the bus 14. The input / output interface 15 is connected to a switch detection circuit 16, a fret detection circuit 17, an A / D conversion circuit 18, a first sound generation circuit 19, and a second sound generation circuit 20.

The ROM 12 stores programs such as various processes to be executed by the CPU 11, for example, a tone generation process according to the vibration level of the strings. Further, the ROM 12 stores a scale table for each chord indicating the pitch of the musical tone of each string in the chord selected by turning on / off each switch of the fret switch group 22. The ROM 12 also has a waveform data area that stores waveform data for generating musical sounds such as an acoustic guitar, an electric guitar, a bass guitar, and a violin as sampling sound sources for each pitch indicated in the scale table.
The RAM 13 stores a program read from the ROM 12 and data generated in the course of processing.

  The switch detection circuit 16 detects the state of each switch of the control switch group 21 for selecting a tone color and the like and inputs it to the CPU 11. The control switch group 21 instructs a musical sound mode and start of performance.

  The fret detection circuit 17 detects the on / off state of each switch of the fret switch group 22 and inputs it to the CPU 11. The fret switch group 22 is composed of 48 switches of 4 strings × 12 frets.

  The A / D conversion circuit 18 converts the analog values acquired by the first picking sensor 23 and the second picking sensor 24 configured by a pickup, a sensor amplifier, and a waveform processing circuit for each string according to an instruction from the CPU 11. The data is sampled and converted into a digital value that can be processed by the CPU 11. The A / D conversion circuit 18 inputs a first input signal including a digital value obtained by converting the analog value acquired by the first picking sensor 23 to the CPU 11. The A / D conversion circuit 18 inputs a second input signal including a digital value obtained by converting the analog value acquired by the second picking sensor 24 to the CPU 11.

  Here, the CPU 11 inputs mode information indicating the tone mode corresponding to the state of each switch input from the switch detection circuit 16 and sound indicating the pitch corresponding to the state of each switch input from the fret detection circuit 17. A sound generation 1 control signal including high information, a first input signal input from the A / D conversion circuit 18, and a first input signal and a second input signal is input to the first sound generation circuit 19. Further, the CPU 11 receives mode information indicating the tone mode corresponding to the state of each switch input from the switch detection circuit 16 and the pitch indicating the pitch corresponding to the state of each switch input from the fret detection circuit 17. A sound generation 2 control signal including information and a second input signal input from the A / D conversion circuit 18 is input to the second sound generation circuit 20.

Under the control of the CPU 11, the first sound generation circuit 19 reads waveform data based on the sound generation 1 control signal input from the CPU 11 from the ROM 12 and inputs the waveform data to the addition circuit 25 or the D / A conversion circuit 26.
Under the control of the CPU 11, the second sound generation circuit 20 reads out waveform data based on the sound generation 2 control signal input from the CPU 11 from the ROM 12 and inputs the waveform data to the addition circuit 25.

The adding circuit 25 adds and synthesizes the waveform data input from the first sounding circuit 19 and the second sounding circuit 20, and inputs the combined waveform data to the D / A conversion circuit 26.
The D / A conversion circuit 26 converts the combined waveform data input from the first sound generation circuit 19 or the addition circuit 25 into an audio signal that is analog data, and outputs the audio signal to the external sound source 30.

The external sound source 30 includes an amplifier circuit 41 and a speaker 42.
The amplifier circuit 41 amplifies the audio signal output from the D / A conversion circuit 26 and outputs the amplified audio signal to the speaker 42.
The speaker 42 produces the amplified audio signal output from the amplifier circuit 41.

Next, a main process executed by the electronic stringed musical instrument 1 having the hardware configuration shown in FIG. 2 will be described with reference to FIG.
FIG. 3 is a flowchart for explaining the flow of the main process.

  In the present embodiment, when the user performs an operation to turn on the power to the control switch group 21, in the present embodiment, the main process is started when the operation is performed. That is, the following processing is executed.

In step S1, the CPU 11 executes an initial process. In this process, the CPU 1 executes initialization at startup of various registers and count values.
In step S2, the CPU 11 ends the main process when the power is turned off, and moves the process to step S3 when the power is not turned off.

  In step S3, the CPU 11 executes a control switch process. In this step, the CPU 11 detects each operation on each switch constituting the control switch group 21 and executes a process according to the detected operation. Specifically, in this step, the CPU 11 specifies which one of a plurality of types of musical sound modes is selected from the state of each switch of the control switch group 21 input from the switch detection circuit 16, and specifies the specified musical sound. On the basis of the mode, a process for generating a musical tone is executed in the subsequent steps.

In the present embodiment, the plurality of types of musical sound modes include a basic mode, a continuous sound mode, and a vibration sound mode.
In the basic mode, different pitches and timbres are set for each of the four strings in the first picking sensor 23 and the second picking sensor 24.
For example, in the basic mode, the four strings of the first picking sensor 23 have the pitches of the open strings (all the switches of the fret switch group 22 are OFF) sequentially “E • A • D • G”. The tone is set to bass guitar. Specifically, in the basic mode, the four strings of the first picking sensor 23 are associated with a scale table in which the pitches of the open strings are sequentially set to “E, A, D, and G”. Yes.

  In addition, the four strings of the second picking sensor 24 have pitches of open strings (all the fret switch group 22 in the off state) sequentially “D · G · B · E” (that is, general The pitch of the lower four strings of a typical electric guitar is tuned, and the tone is set to electric guitar. Specifically, in the basic mode, the four strings of the second picking sensor 24 are associated with a scale table in which the pitches of the open strings are sequentially set to “D, G, B, E”. Yes.

As described above, in this embodiment, the string picked by the first picking sensor 23 as the specific string detecting means and the string picked by the second picking sensor 24 as another string detecting means. Even when the detected strings are of the same type and the pressing position detected by the fret switch group 22 as the pressing detecting means is the same, the first sounding circuit 19 as the first sounding instruction means and The pitches of the musical sounds to be instructed for sound generation by the second sound generation circuit 20 as the second sound generation instruction means are different.
The tone colors of the musical sounds to be instructed by the first sound generation circuit 19 as the first sound generation instruction means and the second sound generation circuit 20 as the second sound generation instruction means are different from each other.

  Next, in the continuous tone mode, musical tones having the same pitch and tone color are set for each of the four strings in the first picking sensor 23 and the second picking sensor 24. In the continuous sound mode, sound is generated (note-on) when the string of the first picking sensor 23 is struck, and mute (note) when the string of the second picking sensor 24 is struck.・ Off)

  Next, in the vibration sound mode, when the string of the first picking sensor 23 is struck, a sound is generated (note-on). During this sounding, the string of the second picking sensor 24 is struck. In this case, the pitch is changed according to the mode of the string operation (for example, the mode of being finely shaken or pulled strongly), and this is effective for the musical sound produced by the string operation of the string of the first picking sensor 23. Is granted.

  In step S4, the CPU 11 moves the process to step S5 if the musical sound mode detected in step S3 is the basic mode, and moves the process to step S6 if it is not the basic mode.

  In step S5, the CPU 11 executes a basic mode sound generation process described with reference to FIG. In this step, the CPU 11 executes a process of generating a musical sound in the basic mode based on the string string operation of the first picking sensor 23 and the second picking sensor 24. When the process of step S5 ends, the CPU 11 returns the process to step S2.

  In step S6, the CPU 11 moves the process to step S7 if the musical sound mode detected in step S3 is the continuous sound mode, and moves the process to step S8 if it is not the continuous sound mode.

  In step S7, the CPU 11 executes a continuous sound mode sound generation process described with reference to FIG. In this step, the CPU 11 executes a process of generating a musical sound in the continuous sound mode based on the string string operation of the first picking sensor 23 and the second picking sensor 24. When the process of step S7 ends, the CPU 11 returns the process to step S2.

  In step S8, the CPU 11 executes a vibration sound mode sound generation process described with reference to FIG. In this step, the CPU 11 executes a process of generating a musical sound in the vibration sound mode based on the string string operation of the first picking sensor 23 and the second picking sensor 24. When the process of step S8 ends, the CPU 11 returns the process to step S2.

FIG. 4 is a flowchart for explaining the flow of the basic mode sound generation process.
In step S <b> 51, the CPU 11 determines whether or not the first input signal including the digital value obtained by converting the analog value acquired by the first picking sensor 23 has been received from the A / D conversion circuit 18. In this step, if the CPU 11 determines that the first input signal has been received, the process proceeds to step S52. If the CPU 11 determines that the first input signal has not been received, the process proceeds to step S55. .

  In step S52, the CPU 11 executes fret processing. In this step, the CPU 11 receives a signal indicating the on / off state of each switch of the fret switch group 22 from the fret detection circuit 17, and from the position of the switch in the on state (position in the matrix indicated by 4 strings × 12 frets). The chord pressed by the user is detected and stored in the RAM 13.

  In step S53, the CPU 11 executes a trigger process. In this step, the CPU 11 acquires the vibration levels of the plurality of strings in the first picking sensor 23 based on the first input signal received from the A / D conversion circuit 18, and the strings whose vibration levels are equal to or higher than a predetermined value. And the detected vibration level of the string is stored in the RAM 13 respectively.

  In step S54, the first sound generation circuit 19 executes a first sound generation process. In this step, the first tone generation circuit 19 is controlled by the CPU 11, and for each string detected by the CPU 11 in step S53, the pitch indicated in the scale table corresponding to the chord detected in step S52 is set in advance. Waveform data for generating a musical tone that is a timbre is read from the ROM 12 and input to the adding circuit 25. The waveform data read in this step in the basic mode has a waveform that decays with the lapse of time with the sounding start as a peak. That is, the musical sound generated based on the waveform data is attenuated and silenced over time.

  In step S <b> 55, the CPU 11 determines whether or not the second input signal including the digital value obtained by converting the analog value acquired by the second picking sensor 24 is received from the A / D conversion circuit 18. In this step, if the CPU 11 determines that the second input signal has been received, the process proceeds to step S56, and if it is determined that the second input signal has not been received, the process proceeds to step S59. .

  In step S56, the CPU 11 executes a fret process. In this step, the CPU 11 receives a signal indicating the on / off state of each switch of the fret switch group 22 from the fret detection circuit 17, and from the position of the switch in the on state (position in the matrix indicated by 4 strings × 12 frets). The chord pressed by the user is detected and stored in the RAM 13.

  In step S57, the CPU 11 executes a trigger process. In this step, the CPU 11 acquires the vibration level of the string of the second picking sensor 24 based on the second input signal received from the A / D conversion circuit 18, and detects the string whose vibration level is equal to or higher than a predetermined value. The detected vibration levels of the strings are stored in the RAM 13 respectively.

  In step S58, the second sound generation circuit 20 executes a second sound generation process. In this step, the second tone generation circuit 20 is controlled by the CPU 11, and for each string detected by the CPU 11 in step S57, the pitch shown in the scale table corresponding to the chord detected in step S56 is set in advance. Waveform data for generating a musical tone that is a timbre is read from the ROM 12 and input to the adding circuit 25. The waveform data read in this step in the basic mode has a waveform that decays with the lapse of time with the sounding start as a peak. That is, the musical sound generated based on the waveform data is attenuated and silenced over time.

  In step S59, the addition circuit 25 executes an addition process. In this step, the adding circuit 25 is controlled by the CPU 11 to add and synthesize the waveform data input from the first sounding circuit 19 and the second sounding circuit 20, respectively, and synthesize the synthesized waveform data to the D / A conversion circuit 26. To enter.

In step S60, the D / A conversion circuit 26 executes a sound generation process. In this step, the D / A conversion circuit 26 is controlled by the CPU 11 and converts the combined waveform data input from the addition circuit 25 into an audio signal that becomes a sound having a strength corresponding to the vibration level of the string acquired in step S57. The audio signal is converted and output to the external sound source 30.
The external sound source 30 amplifies the audio signal output from the D / A conversion circuit 26 by the amplifier circuit 41 and generates a sound from the speaker 42. When the process of step S60 ends, the CPU 11 returns the process to step S2.

  As described above, the first sound generation circuit 19 as the first sound generation instruction means is a specific string detection means in the first picking sensor 23 and the second picking sensor 24 as the plurality of string detection means. At the timing when the string is detected by the first picking sensor 23 as the position specified by the pressed position detected by the fret switch group 22 as the pressure detecting means and the string from which the string was detected by the first picking sensor 23 The tone generation of the generated tone is instructed to the external sound source 30 as the sound source connected via the D / A conversion circuit 26 and the addition circuit 25.

  Further, the CPU 11 as the sound source control means, when the string is detected by the second picking sensor 24 as the string detection means different from the first picking sensor 23 as the specific string detection means, The external sound source 30 connected via the second sound generation circuit 20, the D / A conversion circuit 26 and the addition circuit 25 is controlled.

  Further, the second sound generation circuit 20 as the second sound generation instructing means presses the fret switch group 22 at the timing when the string is detected by the second picking sensor 24 as another string detection means. The tone of the musical tone having the pitch specified by the string whose position and the string was detected by the second picking sensor 24 is transmitted to the external sound source 30 connected via the D / A conversion circuit 26 and the addition circuit 25. Instruct.

FIG. 5 is a flowchart for explaining the flow of the continuous sound mode sound generation process.
In step S <b> 71, the CPU 11 determines whether or not the first input signal including the digital value obtained by converting the analog value acquired by the first picking sensor 23 has been received from the A / D conversion circuit 18. In this step, if the CPU 11 determines that the first input signal has been received, the process proceeds to step S72. If the CPU 11 determines that the first input signal has not been received, the process proceeds to step S75. .

  In step S72, the CPU 11 executes fret processing. In this step, the CPU 11 receives a signal indicating the on / off state of each switch of the fret switch group 22 from the fret detection circuit 17, and from the position of the switch in the on state (position in the matrix indicated by 4 strings × 12 frets). The chord pressed by the user is detected and stored in the RAM 13.

  In step S73, the CPU 11 executes a trigger process. In this step, the CPU 11 acquires the vibration levels of the plurality of strings in the first picking sensor 23 based on the first input signal received from the A / D conversion circuit 18, and the strings whose vibration levels are equal to or higher than a predetermined value. And the detected vibration level of the string is stored in the RAM 13 respectively.

  In step S74, the first sound generation circuit 19 executes a first sound generation process. In this step, the first tone generation circuit 19 is controlled by the CPU 11, and for each string detected by the CPU 11 in step S73, the pitch shown in the scale table corresponding to the chord detected in step S72 is set in advance. Waveform data for generating a musical tone having a timbre is read from the ROM 12 and input to the D / A conversion circuit 26. The waveform data read in this step in the continuous sound mode has a waveform that maintains the amplitude at the start of sound generation. That is, the musical sound generated based on the waveform data is not attenuated and silenced over time.

  In step S <b> 75, the CPU 11 determines whether or not the second input signal including the digital value obtained by converting the analog value acquired by the second picking sensor 24 has been received from the A / D conversion circuit 18. In this step, if the CPU 11 determines that the second input signal has been received, the process proceeds to step S76, and if it is determined that the second input signal has not been received, the process proceeds to step S78. .

  In step S76, the CPU 11 executes a trigger process. In this step, the CPU 11 acquires the vibration level of the string of the second picking sensor 24 based on the second input signal received from the A / D conversion circuit 18, and detects the string whose vibration level is equal to or higher than a predetermined value. The detected vibration levels of the strings are stored in the RAM 13 respectively.

In step S77, the CPU 11 executes a first sound generation mute process. In this step, the CPU 11 compares the type of string detected in step S73 (for example, the first string) with the type of string detected in step S76, and selects the type of string detected in duplicate as the object to be silenced. Is extracted as a mute string. The CPU 11 instructs the first sound generation circuit 19 to delete the waveform data for the string extracted as the mute string from the waveform data read in step S74.
In this step, the first tone generation circuit 19 is controlled by the CPU 11 and deletes the waveform data of the string instructed to be deleted from the waveform data read in step S74. For example, when the first sound generation circuit 19 deletes the waveform data for all the strings read in step S74, the waveform data to be input to the D / A conversion circuit 26 is lost, and all sounds are muted. On the other hand, when the first tone generation circuit 19 deletes the waveform data for some strings read in step S74, for example, only the waveform data for other strings is input to the D / A conversion circuit 26 and the musical tone of the strings is input. Will continue to be sounded, and the sound of some strings will be muted.

In step S78, the D / A conversion circuit 26 executes a sound generation process. In this step, the D / A conversion circuit 26 is controlled by the CPU 11, and the waveform data input from the first sound generation circuit 19 is converted into an audio signal that becomes a sound having a strength corresponding to the vibration level of the string detected in step S 73. And the audio signal is output to the external sound source 30.
The external sound source 30 amplifies the audio signal output from the D / A conversion circuit 26 by the amplifier circuit 41 and generates a sound from the speaker 42. When the process of step S78 ends, the CPU 11 returns the process to step S2.

As described above, the CPU 11 as the mute instruction means passes through the first sound generation circuit 19 and the D / A conversion circuit 26 at the timing when the string is detected by the second picking sensor 24 as another string detection means. The external sound source 30 connected in this way is instructed to mute the musical sound.
Further, the CPU 11 as the mute instruction means has the first picking string as the specific string detection means in which the same type of string as the string detected by the second picking sensor 24 as another string detection means is used. In response to the detection of the string by the sensor 23, only the musical sound whose sound is instructed is instructed to mute.

FIG. 6 is a flowchart for explaining the flow of the vibration sound mode sound generation process.
In step S <b> 81, the CPU 11 determines whether or not the first input signal including the digital value obtained by converting the analog value acquired by the first picking sensor 23 has been received from the A / D conversion circuit 18. In this step, if the CPU 11 determines that the first input signal has been received, the process proceeds to step S82. If the CPU 11 determines that the first input signal has not been received, the process proceeds to step S85. .

  In step S82, the CPU 11 executes fret processing. In this step, the CPU 11 receives a signal indicating the on / off state of each switch of the fret switch group 22 from the fret detection circuit 17, and from the position of the switch in the on state (position in the matrix indicated by 4 strings × 12 frets). The chord pressed by the user is detected and stored in the RAM 13.

  In step S83, the CPU 11 executes a trigger process. In this step, the CPU 11 acquires the vibration levels of the plurality of strings in the first picking sensor 23 based on the first input signal received from the A / D conversion circuit 18, and the strings whose vibration levels are equal to or higher than a predetermined value. And the detected vibration level of the string is stored in the RAM 13 respectively.

  In step S84, the first sound generation circuit 19 executes a first sound generation process. In this step, the first tone generation circuit 19 is controlled by the CPU 11, and for each string detected by the CPU 11 in step S83, the pitch indicated in the scale table corresponding to the chord detected in step S82 is set in advance. Waveform data for generating a musical tone having a timbre is read from the ROM 12 and input to the D / A conversion circuit 26. The waveform data read in this step in the vibration sound mode has a waveform that attenuates with the lapse of time with the peak at the start of sound generation. That is, the musical sound generated based on the waveform data is attenuated and silenced over time.

  In step S <b> 85, the CPU 11 determines whether or not a second input signal including a digital value obtained by converting the analog value acquired by the second picking sensor 24 has been received from the A / D conversion circuit 18. In this step, if the CPU 11 determines that the second input signal has been received, the process proceeds to step S86, and if it is determined that the second input signal has not been received, the process proceeds to step S88. .

  In step S86, the CPU 11 executes trigger processing. In this step, the CPU 11 acquires the vibration level of the string of the second picking sensor 24 based on the second input signal received from the A / D conversion circuit 18, and detects the string whose vibration level is equal to or higher than a predetermined value. The detected vibration levels of the strings are stored in the RAM 13 respectively.

In step S87, the CPU 11 compares the type of string detected in step S83 (for example, the first string) with the type of string detected in step S86, and gives an effect to the type of string detected in duplicate. This is extracted as an effect-giving string to be processed. The CPU 11 instructs the first sound generation circuit 19 to change the pitch of the waveform data for the string extracted as the effect imparted string from the waveform data read in step S84.
In this step, the first tone generation circuit 19 is controlled by the CPU 11 and the vibration of the string detected in step S86 with respect to the waveform data of the string instructed to change the pitch among the waveform data read in step S84. The pitch is changed by an amount corresponding to the level. The first sounding circuit 19 inputs the waveform data whose pitch is changed to the D / A conversion circuit 26.

In step S88, the D / A conversion circuit 26 executes a sound generation process. In this step, the D / A conversion circuit 26 is controlled by the CPU 11 and uses the waveform data input from the first sound generation circuit 19 as an audio signal that becomes a sound having a strength corresponding to the vibration level of the string detected in step S83. And the audio signal is output to the external sound source 30.
The external sound source 30 amplifies the audio signal output from the D / A conversion circuit 26 by the amplifier circuit 41 and generates a sound from the speaker 42. When the process of step S88 ends, the CPU 11 returns the process to step S2.

As described above, the CPU 11 as the effect applying means passes through the first sound generation circuit 19 and the D / A conversion circuit 26 at the timing when the string is detected by the second picking sensor 24 as another string detection means. The effect is given to the musical sound generated by the connected external sound source 30.
Further, the CPU 11 as the effect applying means has the first picking string as the specific string detecting means in which the same type of string as the string detected by the second picking sensor 24 as another string detecting means is used. In response to the detection of the string by the sensor 23, the effect is given only to the musical sound whose pronunciation is instructed.

As described above, the electronic stringed instrument 1 of the present embodiment is
A fret switch group 22 having a pressure detection area and detecting which position of the pressure detection area is pressed;
A first picking sensor 23 and a second picking sensor 24 each having a plurality of strings and detecting that one of the plurality of strings is played;
At the timing when the string is detected by the first picking sensor 23 in the first picking sensor 23 and the second picking sensor 24, the pressing position detected by the fret switch group 22 and the first picking sensor 23 are detected. A first sound generation circuit 19 for instructing the connected external sound source 30 to generate a tone having a pitch designated by the string from which the string was detected;
A CPU 11 for controlling a connected sound source when a string is detected by a second picking sensor 24 different from the first picking sensor 23;
Have
In this case, in the electronic stringed instrument, by providing two picking sensors having strings that can be played by the user, the user plays the strings of the first picking sensor to generate musical sounds, and the second picking sensor By playing a string, the generated musical sound can be changed to a different musical sound without performing an operation different from the string operation. Thereby, in the electronic stringed musical instrument, it is possible to improve the expressiveness of the sound by making it possible to change the musical tone quickly.

Further, in the electronic stringed musical instrument 1 of the present embodiment, at the timing when the string is detected by the second picking sensor 24, the pressed position detected by the fret switch group 22 and the string is detected by the second picking sensor 24. And a second sound generation circuit 20 for instructing the external sound source 30 to generate a tone having a pitch specified by the string.
In this case, the electronic stringed instrument has a second sounding circuit that is different from the first sounding circuit, so that the fret switch group separates the musical sound generated when the string of the first picking sensor is played. It is possible to generate a musical sound based on the detected pressing position and the string string of the second picking sensor.

Furthermore, the electronic stringed musical instrument 1 according to the present embodiment is the case where the string from which the string is detected by the first picking sensor 23 and the string from which the string is detected by the second picking sensor 24 are of the same type, and the fret Even when the pressed positions detected by the switch group 22 are the same, the pitches of the musical sounds to be instructed for sound generation by the first sound generation circuit 19 and the second sound generation circuit 20 are different.
In this case, when the pressing position of the fret switch group 22 is the same and the same type of strings of the first picking sensor and the second picking sensor are struck, different musical sounds can be generated. That is, in the case of a conventional guitar, for example, if there are four strings, only four types of chords can be expressed. However, according to the electronic stringed instrument 1 of the present embodiment, eight types of musical tones are doubled at maximum. The chords can be expressed.

Furthermore, in the electronic stringed instrument 1 of the present embodiment, the tone colors of the musical sounds to be instructed for sound generation by the first sound generation circuit 19 and the second sound generation circuit 20 are different.
In this case, for example, the first tone generation circuit instructs the tone generation of the bass guitar tone, and the second tone generation circuit instructs the generation of the tone tone of the electric guitar. As a result, the user can perform two roles of one of the bass guitar player and the electric guitar player by playing the strings of the first picking sensor 23 and the second picking sensor 24.

Furthermore, the CPU 11 of the electronic stringed musical instrument 1 of the present embodiment instructs the connected external sound source 30 to mute the musical sound at the timing when the string is detected by the second picking sensor 24.
In this case, for example, it is possible to continuously generate a musical sound generated by playing the string of the first picking sensor 23 until the string of the second picking sensor 24 is played.

Further, the CPU 11 of the electronic stringed musical instrument 1 according to the present embodiment responds to the fact that the string of the same type as the string whose bullet is detected by the second picking sensor 24 is detected by the first picking sensor 23. Only the musical sound whose pronunciation is instructed is instructed to mute.
In this case, it is possible to mute some of the musical sounds generated by playing the plurality of strings of the first picking sensor 23 and play the other musical sounds continuously.

Further, the CPU 11 of the electronic stringed musical instrument 1 according to the present embodiment gives an effect to the musical sound generated by the connected external sound source 30 at the timing when the string is detected by the second picking sensor 24.
In this case, a vibrato or tremo effect can be added to the musical sound generated by the string of the first picking sensor being struck according to the form of the string of the string of the second picking sensor. it can.

Further, the CPU 11 of the electronic stringed musical instrument 1 according to the present embodiment responds to the fact that the string of the same type as the string whose bullet is detected by the second picking sensor 24 is detected by the first picking sensor 23. The effect is applied only to the musical sound whose pronunciation is instructed.
In this case, a vibrato or a tremo effect can be added to only some of the musical tones generated by playing a plurality of strings of the first picking sensor 23.

  In addition, this invention is not limited to the above-mentioned embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.

  In the embodiment described above, the electronic apparatus to which the present invention is applied has been described by taking the electronic stringed instrument 1 such as an electric guitar as an example, but is not particularly limited thereto. The present invention can be applied to general electronic stringed instruments having a sound generation function capable of sounding chords. Specifically, for example, the present invention can be applied to an electronic stringed instrument simulating a violin or a cello.

In the embodiment described above, two of the first picking sensor and the second picking sensor are provided as the plurality of string detecting means. However, the present invention is not limited to this, and the number of the string detecting means is, for example, three. Can be a number.
Moreover, in the above-mentioned embodiment, although it has four strings, it is not restricted to this, The number of strings can be made into arbitrary numbers, such as six, for example.

In the above-described embodiment, in the basic mode, the pitches of the open strings of the four strings of the first picking sensor are sequentially tuned to “E, A, D, and G”, and the tone is applied to the bass guitar. Is set. The four strings of the second picking sensor are tuned to “D, G, B, E” in order of the pitch of the open strings (ie, the pitch of the lower four strings of a typical electric guitar). And the tone is set to electric guitar.
However, the present invention is not limited to this. For example, the four strings of the second picking sensor are set in the same manner as in the above-described embodiment, and the pitches of the four strings of the first picking sensor are sequentially set to “ E.A.D.G "(that is, the pitch of the upper four strings of a typical electric guitar) and set the tone to the same electric guitar as the four strings of the second picking sensor. Also good.
This makes it possible to express a sound similar to that of a general 6-string guitar in a 4-string electronic string instrument.

  The series of processes described above can be executed by hardware or can be executed by software. For example, the series of processes described above can be executed by hardware or can be executed by software. In other words, the functional configuration described in the flowcharts of FIGS. 3 to 6 is merely an example, and is not particularly limited. That is, it is sufficient that the electronic stringed musical instrument 1 has a function capable of executing the above-described series of processes as a whole, and what functional configuration is used to realize this function is particularly shown in the flowcharts of FIGS. It is not limited to the example. In addition, one functional configuration may be configured by a single hardware, a single software, or a combination thereof.

  When a series of processing is executed by software, a program constituting the software is installed on a computer or the like from a network or a recording medium. The computer may be a computer incorporated in dedicated hardware. The computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose personal computer.

  The recording medium including such a program is not only constituted by a removable medium (not shown) distributed separately from the apparatus main body in order to provide the program to the user, but also in a state of being incorporated in the apparatus main body in advance. It is composed of a recording medium provided to the user. The removable medium is composed of, for example, a magnetic disk (including a floppy disk), an optical disk, a magneto-optical disk, or the like. The optical disk is composed of, for example, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versatile Disk), or the like. The magneto-optical disk is configured by an MD (Mini-Disk) or the like. In addition, the recording medium provided to the user in a state of being preinstalled in the apparatus main body is configured by, for example, the ROM 12 of FIG. 2 in which a program is recorded, a hard disk (not shown), and the like.

  In the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in time series along the order, but is not necessarily performed in time series, either in parallel or individually. The process to be executed is also included.

The invention described in the scope of claims at the beginning of the filing of the present application will be appended.
[Appendix 1]
A pressure detection means having a pressure detection area and detecting which position of the pressure detection area is pressed;
A plurality of string detecting means each having a plurality of strings and detecting that one of the plurality of strings has been played;
The string is detected by the pressing position detected by the pressing detection means and the specific string detecting means at the timing when the string is detected by the specific string detecting means among the plurality of string detecting means. First sound generation instruction means for instructing a connected sound source to generate a musical tone having a pitch specified by a string;
Sound source control means for controlling the connected sound source when a string is detected by a string detection means different from the specific string detection means;
Electronic stringed instrument with
[Appendix 2]
At the timing when the string is detected by the other string detection means, the pressing position detected by the pressure detection means and the pitch specified by the string from which the string was detected by the other string detection means. The electronic stringed instrument according to appendix 1, further comprising second sound generation instruction means for instructing the connected sound source to generate a musical sound.
[Appendix 3]
The pressing position detected by the pressing detection means when the string detected by the specific string detection means and the string detected by the other string detection means are of the same type 3. The electronic stringed musical instrument according to appendix 2, wherein the pitches of the musical tones that are instructed to be generated by the first sound generation instruction means and the second sound generation instruction means are different.
[Appendix 4]
The electronic stringed instrument according to any one of Supplementary notes 2 and 3, wherein the timbres of the musical sounds to be instructed to be generated by the first sound generation instruction means and the second sound generation instruction means are different from each other.
[Appendix 5]
The electronic stringed instrument according to claim 1, wherein the sound source control means includes a mute instruction means for instructing the connected sound source to mute at a timing when a string is detected by the other string detection means.
[Appendix 6]
The mute instruction means is instructed to generate a sound of a string of the same type as that of which the string was detected by the other string detection means in response to the detection of the string by the specific string detection means. The electronic stringed instrument according to appendix 5, in which only the musical sound is instructed to mute.
[Appendix 7]
The sound source control means includes an effect giving means for giving an effect to a musical sound produced by the connected sound source at a timing when a string is detected by the other string detection means. Electronic stringed instruments.
[Appendix 8]
The effect applying means is instructed to generate a sound of a string of the same type as that of which the string was detected by the other string detection means in response to the detection of the string by the specific string detection means. The electronic stringed instrument according to appendix 7, which gives an effect only to a musical tone.
[Appendix 9]
A press detection means that has a press detection area and detects which position in the press detection area is pressed, and each of the strings has a plurality of strings, and detects that one of the strings has been played. A musical tone generating method executed by an electronic string instrument having a plurality of string detecting means,
The string is detected by the pressing position detected by the pressing detection means and the specific string detecting means at the timing when the string is detected by the specific string detecting means among the plurality of string detecting means. Instructing a connected sound source to pronounce a musical tone at a pitch specified by a string;
And a step of controlling the connected sound source when a string is detected by a string detection means different from the specific string detection means.
[Appendix 10]
A press detection means that has a press detection area and detects which position in the press detection area is pressed, and each of the strings has a plurality of strings, and detects that one of the strings has been played. A computer for controlling an electronic stringed instrument having a plurality of string detecting means,
The string is detected by the pressing position detected by the pressing detection means and the specific string detecting means at the timing when the string is detected by the specific string detecting means among the plurality of string detecting means. First sound generation instruction means for instructing a connected sound source to generate a musical tone having a pitch specified by a string
Sound source control means for controlling the connected sound source when a string is detected by a string detection means different from the specific string detection means;
Program to function as.

  DESCRIPTION OF SYMBOLS 1 ... Electronic string instrument, 11 ... CPU, 12 ... ROM, 13 ... RAM, 14 ... Bus, 15 ... Input / output interface, 16 ... Switch detection circuit, 17 ... Fret detection circuit, 18 ... A / D conversion circuit, 19 ... first sound generation circuit, 20 ... second sound generation circuit, 21 ... control switch group, 22 ... fret switch group, 23 ... 1st picking sensor, 24 ... 2nd picking sensor, 25 ... Adder circuit, 26 ... D / A conversion circuit, 30 ... External sound source, 41 ... Amplifier circuit, 42 ... Speaker

Claims (10)

A pressure detection means having a pressure detection area and detecting which position of the pressure detection area is pressed;
A plurality of string detecting means each having a plurality of strings and detecting that one of the plurality of strings has been played;
The string is detected by the pressing position detected by the pressing detection means and the specific string detecting means at the timing when the string is detected by the specific string detecting means among the plurality of string detecting means. First sound generation instruction means for instructing a connected sound source to generate a musical tone having a pitch specified by a string;
Sound source control means for controlling the connected sound source when a string is detected by a string detection means different from the specific string detection means;
Electronic stringed instrument with   At the timing when the string is detected by the other string detection means, the pressing position detected by the pressure detection means and the pitch specified by the string from which the string was detected by the other string detection means. 2. The electronic stringed instrument according to claim 1, further comprising second sound generation instruction means for instructing the connected sound source to generate a musical sound.   The pressing position detected by the pressing detection means when the string detected by the specific string detection means and the string detected by the other string detection means are of the same type 3. The electronic stringed musical instrument according to claim 2, wherein even if they are the same, the pitches of the musical sounds to be instructed to be generated by the first sound generation instruction means and the second sound generation instruction means are different from each other.   4. The electronic stringed instrument according to claim 2, wherein timbres of musical tones to be instructed by the first sound generation instruction means and the second sound generation instruction means are different from each other.   2. The electronic stringed musical instrument according to claim 1, wherein the sound source control means includes a mute instruction means for instructing the connected sound source to mute at a timing when a string is detected by the other string detection means.   The mute instruction means is instructed to generate a sound of a string of the same type as that of which the string was detected by the other string detection means in response to the detection of the string by the specific string detection means. The electronic stringed instrument according to claim 5, wherein only the musical sound is instructed to mute.   2. The sound source control means has an effect applying means for applying an effect to a musical sound produced by the connected sound source at a timing when a string is detected by the other string detecting means. The electronic stringed instrument described.   The effect applying means is instructed to generate a sound of a string of the same type as that of which the string was detected by the other string detection means in response to the detection of the string by the specific string detection means. The electronic stringed instrument according to claim 7, wherein an effect is imparted only to a musical tone. A press detection means that has a press detection area and detects which position in the press detection area is pressed, and each of the strings has a plurality of strings, and detects that one of the strings has been played. A musical tone generating method executed by an electronic string instrument having a plurality of string detecting means,
The string is detected by the pressing position detected by the pressing detection means and the specific string detecting means at the timing when the string is detected by the specific string detecting means among the plurality of string detecting means. Instructing a connected sound source to pronounce a musical tone at a pitch specified by a string;
And a step of controlling the connected sound source when a string is detected by a string detection means different from the specific string detection means. A press detection means that has a press detection area and detects which position in the press detection area is pressed, and each of the strings has a plurality of strings, and detects that one of the strings has been played. A computer for controlling an electronic stringed instrument having a plurality of string detecting means,
The string is detected by the pressing position detected by the pressing detection means and the specific string detecting means at the timing when the string is detected by the specific string detecting means among the plurality of string detecting means. First sound generation instruction means for instructing a connected sound source to generate a musical tone having a pitch specified by a string
Sound source control means for controlling the connected sound source when a string is detected by a string detection means different from the specific string detection means;
Program to function as.

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