JP2014134602A - Electronic string instrument, musical tone generation method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize an oscillator synchronization effect by means of a waveform data reading method without compromising a product cost.SOLUTION: A CPU performs: determining a pitch on the basis of a string with which a picking has been detected and a fret located where the string has been pressed; starting operation of repeatedly reading an equivalent of one cycle of a master waveform and a slave wave form that are in mutually different cycle at a speed corresponding to the determined pitch, in response to the detection of picking, and also generating a musical tone of a wave form obtained by reading a start timing of repeatedly reading the slave waveform synchronously with a start timing of repeatedly reading the master waveform; detecting a vibration pitch of the string with which the picking has been detected; and correcting, on the basis of the detected vibration pitch, a pitch to be used for generating a musical tone.

Description

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

  2. Description of the Related Art Conventionally, there is known a so-called oscillator-synchronized waveform generator that has two systems of oscillators on the master side and slave side and forcibly synchronizes the waveform generation start timing of the slave oscillator with the waveform generation start timing of the master oscillator. Yes. In this type of waveform generator, for example, if the pitch of the slave waveform output is made constant and only the pitch of the master waveform output is changed, the waveform shape of the slave waveform output is deformed, thereby causing the pitch change and the timbre change simultaneously. A waveform having a unique acoustic effect (oscillator synchronization effect) obtained can be generated, and this type of device is disclosed in, for example, Patent Document 1.

JP 2009-42785 A

  By the way, even if a general waveform data readout type sound source is equipped with a multi-channel oscillator (waveform generator), any two sets of oscillators are assigned to a master oscillator and a slave oscillator, and a slave oscillator is provided. If it is attempted to forcibly synchronize the top of the waveform in which the error occurs with the waveform read cycle of the master oscillator, the hardware configuration becomes very complicated and the product cost increases. In other words, there is a problem that the oscillator synchronization effect cannot be realized by the waveform data reading method without incurring high product cost.

  The present invention has been made in view of such circumstances, and an object thereof is to realize an oscillator synchronization effect by a waveform data reading method without incurring high product costs.

In order to achieve the above object, an electronic stringed musical instrument according to one aspect of the present invention is provided.
A plurality of strings stretched on a fingerboard portion provided with a plurality of frets;
A string detection means for detecting that any of the plurality of strings is pressed at any position of the plurality of frets;
String detection means for detecting that one of the plurality of strings has been stringed;
Pitch determining means for determining a pitch based on a string in which the string is detected and a fret at a position where the string is pressed by the string detecting means;
In response to the detection of the string by the string detecting means, an operation of repeatedly reading out one period of the master waveform and the slave waveform having different periods at a speed corresponding to the pitch determined by the pitch determining means is started. And a musical tone generating means for generating a musical tone of a waveform obtained by reading the slave waveform repeated readout start timing in synchronization with the repeated readout start timing of the master waveform;
Pitch detection means for detecting the vibration pitch of the string detected by the string detection means;
Correction means for correcting the pitch used in the musical sound generation means based on the vibration pitch detected by the pitch detection means;
Have

  According to the present invention, the oscillator synchronization effect can be realized by the waveform data reading method without incurring high product costs.

It is a front view which shows the external appearance of the electronic stringed instrument of this invention. It is a block diagram which shows the hardware constitutions of the electronic part which comprises the said electronic stringed instrument. It is a schematic diagram which shows the signal control part of a string-pressing sensor. It is a perspective view of a neck to which a string-pressing sensor of a type that detects string pressing without detecting contact between a string and a fret based on an output of an electrostatic sensor is applied. It is a flowchart which shows the main flow performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the switch process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the timbre switch process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the performance detection process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the string pressing position detection process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the advance trigger process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the precedence trigger availability process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the prior | preceding trigger sound source process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the string vibration process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the normal trigger process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the pitch extraction process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the mute detection process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the integration process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the pitch reflection sound source process performed in the electronic stringed instrument which concerns on this embodiment. It shows the relationship between the waveform on the master side and the waveform on the slave side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Outline of electronic stringed instrument 1]
First, an outline of an electronic stringed musical instrument 1 as an embodiment of the present invention will be described with reference to FIG.

  FIG. 1 is a front view showing an external appearance of the electronic stringed instrument 1. As shown in FIG. 1, the electronic stringed instrument 1 is roughly divided into a main body 10, a neck 20, and a head 30.

  A bobbin 31 on which one end of a steel string 22 is wound is attached to the head 30, and the neck 20 has a plurality of frets 23 embedded in a fingerboard 21. In the present embodiment, six strings 22 and 22 frets 23 are provided. Each of the six strings 22 is associated with a string number. The thinnest string 22 is the string number “1”, and the string number increases in the order of increasing the thickness of the string 22. Each of the 22 frets 23 is associated with a fret number. The fret 23 closest to the head 30 has the fret number “1”, and the fret number of the arranged fret 23 increases as the distance from the head 30 side increases.

  The main body 10 emits sound from a bridge 16 to which the other end of the string 22 is attached, a normal pickup 11 that detects vibration of the string 22, and a hexapickup 12 that detects vibration of each string 22 independently. A tremolo arm 17 for adding a tremolo effect to the sound, an electronic unit 13 built in the main body 10, a cable 14 for connecting each string 22 and the electronic unit 13, and the type of tone are displayed. A display unit 15 is provided.

FIG. 2 is a block diagram illustrating a hardware configuration of the electronic unit 13. The electronic unit 13 includes a CPU (Central Processing Unit) 41, a ROM (Read Only Memory) 42, a RAM (Random Access Memory) 43, a string sensor 44, a sound source 45, a normal pickup 11, a hexa pickup 12, The switch 48, the display unit 15, and an I / F (interface) 49 are connected via a bus 50.
Further, the electronic unit 13 includes a DSP (Digital Signal Processor) 46 and a D / A (digital analog converter) 47.

  The CPU 41 executes various processes according to a program recorded in the ROM 42 or a program loaded into the RAM 43 from a storage unit (not shown).

  The RAM 43 appropriately stores data necessary for the CPU 41 to execute various processes.

  The string-pressing sensor 44 detects what number-of-frets of what-numbered strings are pressed. The string-pressing sensor 44 detects which string 22 (see FIG. 1) has been pressed on any fret 23 (see FIG. 1) based on the output of an electrostatic sensor described later. To do.

  The sound source 45 generates, for example, waveform data of a musical tone whose sound is instructed by MIDI (Musical Instrument Digital Interface) data, and an audio signal obtained by D / A conversion of the waveform data via the DSP 46 and D / A 47. Are output to the external sound source 53 to issue instructions for sound generation and mute. The external sound source 53 amplifies an audio signal output from the D / A 47 and outputs it, and a speaker (not shown) that emits a musical sound using the audio signal input from the amplifier circuit. And).

The normal pickup 11 converts the detected vibration of the string 22 (see FIG. 1) into an electrical signal and outputs it to the CPU 41.
The hex pickup 12 converts the detected independent vibration of each string 22 (see FIG. 1) into an electrical signal and outputs it to the CPU 41.

The switch 48 outputs input signals from various switches (not shown) provided on the main body 10 (see FIG. 1) to the CPU 41.
The display unit 15 displays the type of timbre to be sounded and the like.

  FIG. 3 is a schematic diagram illustrating a signal control unit of the string-pressing sensor 44.

  In the string-pressing sensor 44, the Y signal control unit 52 sequentially designates one of the strings 22 and designates an electrostatic sensor corresponding to the designated string. The X signal control unit 51 designates one of the frets 23 and designates an electrostatic sensor corresponding to the designated fret. In this way, only the electrostatic sensor designated at the same time for both the string 22 and the fret 23 is operated, and the change in the output value of the operated electrostatic sensor is output to the CPU 41 (see FIG. 2) as the string pressing position information.

  FIG. 4 is a perspective view of the neck 20 to which a string-pressing sensor 44 of a type that detects string pressing without detecting contact between the string 22 and the fret 23 based on the output of the electrostatic sensor is shown.

  In FIG. 4, an electrostatic pad 26 as an electrostatic sensor is disposed below the fingerboard 21 in association with each string 22 and each fret 23. That is, as in the present embodiment, in the case of 6 strings × 22 frets, 144 electrostatic pads are arranged. These electrostatic pads 26 detect the electrostatic capacity when the string 22 approaches the fingerboard 21 and transmit it to the CPU 41. The CPU 41 detects the string 22 and the fret 23 corresponding to the pressed position based on the transmitted capacitance value.

[Main flow]
FIG. 5 is a flowchart showing a main flow executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S1, the CPU 41 executes initialization by turning on the power. In step S2, the CPU 41 executes switch processing (described later in FIG. 6). In step S3, the CPU 41 executes performance detection processing (described later in FIG. 8). In step S4, the CPU 41 executes a sound generation process. In the sound generation process, the CPU 41 causes the external sound source 53 to execute the sound generation through the sound source 45 and the like. In step S5, the CPU 41 executes other processing. In other processing, the CPU 41 executes processing such as displaying the code name of the output code on the display unit 15, for example. When the process of step S5 ends, the CPU 41 shifts the process to step S2 and repeats the processes of steps S2 to S5.

[Switch processing]
FIG. 6 is a flowchart showing a switch process executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S11, the CPU 41 executes timbre switch processing (described later in FIG. 7). In step S12, the CPU 41 executes mode switch processing. When the process of step S12 ends, the CPU 41 ends the switch process.

[Tone switch processing]
FIG. 7 is a flowchart showing a timbre switch process executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S21, the CPU 41 determines whether or not a timbre switch (not shown) is turned on. If it is determined that the timbre switch is turned on, the CPU 41 proceeds to step S22, and if it is not determined that the timbre switch is turned on, the CPU 41 ends the timbre switch. In step S22, the CPU 41 stores the timbre number corresponding to the timbre specified by the timbre switch in the variable TONE. In step S <b> 23, the CPU 41 supplies an event based on the variable TONE to the sound source 45. Here, the sound source 45 has a master channel (ch1) and a slave channel (ch2), and the event is supplied to these two channels. As a result, the tone color to be pronounced is designated for the sound source 45. When the process of step S23 ends, the CPU 41 ends the timbre switch process.

[Performance detection processing]
FIG. 8 is a flowchart showing a performance detection process executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S31, the CPU 41 executes a pressed string position detection process (described later in FIG. 9). In step S32, the CPU 41 executes string vibration processing (described later in FIG. 12). In step S33, the CPU 41 executes integration processing (described later in FIG. 16). When the process of step S33 ends, the CPU 41 ends the performance detection process.

[Pushing position detection processing]
FIG. 9 is a flowchart showing a string-pressing position detection process (the process in step S31 in FIG. 8) executed in the electronic stringed instrument 1 according to the present embodiment.

First, in step S41, the CPU 41 executes initialization. In step S42, the CPU 41 searches for the pressing position (fret number of the fret that is in contact with the string) sequentially from the string with the string number 1 to the string 6 with string number. Here, when the first step S42 is executed, the search is executed for the string having the string number 1, and when the second step S42 is executed, the search is executed for the string having the string number 2. Thereafter, similarly, the search is executed for each string until the loop processing is performed six times.
In step S43, the CPU 41 sequentially searches the pressing position (the fret number of the fret that is in contact with the string) for the string that is the search target in step S42. In step S44, the CPU 41 determines whether or not a pressing position has been detected.
In this determination, when the electrostatic capacitance detected by the electrostatic pad 26 (see FIG. 7) corresponding to each fret number is equal to or greater than a predetermined threshold, the CPU 41 determines that the pressing position has been detected.
If it is determined in step S44 that a pressing position has been detected, the CPU 41 registers the detected pressing position (string number and fret number) in the string register in step S45. In step S46, the CPU 41 determines whether all the frets have been searched for the search target string. If it is determined that all the frets have been searched, the CPU 41 proceeds to step S47, and if it is not determined that all the frets have been searched, the process proceeds to step S43. Therefore, the processes in steps S43 to S46 are repeatedly executed until it is determined that all the frets have been searched.
In step S47, the CPU 41 determines the position of the maximum fret number among the pressing positions in the string as the pressing position. That is, it is determined that the fret located closest to the bridge among the pressing positions in the string is pressed.
If it is not determined in step S44 that the pressing position has been detected, the CPU 41 moves the process to step S48. In step S48, the CPU 41 recognizes that the string is not pressed. That is, it is recognized as an open string.
In step S49, the CPU 41 records the pitch of the pressing position in the RAM 43 as an initial pitch (Spt).
In step S50, the CPU 41 determines whether or not the pressing position has been searched for all the strings (all six strings). If it is determined that the full string search has been performed, the CPU 41 shifts the process to step S51. If it is not determined that the full string search has been performed, the CPU 41 shifts the process to step S42. In step S51, the CPU 41 executes a preceding trigger process (described later in FIG. 10). The preceding trigger process may be executed between the process of step S49 and the process of step S50. When the process of step S51 ends, the CPU 41 ends the string-pressing position detection process.

[Advance trigger processing]
FIG. 10 is a flowchart showing a preceding trigger process (the process in step S51 in FIG. 9) executed in the electronic stringed instrument 1 according to the present embodiment. Here, the preceding trigger is a trigger for sound generation at the timing when the player presses the string before the string.

First, in step S61, the CPU 41 receives the output from the hex pickup 12, and acquires the vibration level of each string. In step S62, the CPU 41 executes a preceding trigger availability process (described later in FIG. 11). In step S63, it is determined whether or not a preceding trigger is possible, that is, whether or not a preceding trigger flag is on. The preceding trigger flag is turned on in step S72 of the preceding trigger availability process described later. When the preceding trigger flag is on, the CPU 41 shifts the process to step S64, and when the preceding trigger flag is off, the CPU 41 ends the preceding trigger process.
In step S64, the CPU 41 executes a preceding trigger sound source process (described later in FIG. 12). When the process of step S64 ends, the CPU 41 ends the preceding trigger process.

[Precedence trigger availability processing]
FIG. 11 is a flowchart showing the preceding trigger availability processing (processing in step S62 in FIG. 10) executed in the electronic stringed instrument 1 according to the present embodiment.

First, in step S71, the CPU 41 determines whether or not the vibration level of each string based on the output from the hexapickup 12 received in step S61 in FIG. 10 is greater than a predetermined threshold (Th1). If this determination is YES, the CPU 41 shifts the processing to step S72, and if NO, the CPU 41 ends the preceding trigger availability processing.
In step S72, the CPU 41 turns on the preceding trigger flag to enable the preceding trigger. In step S73, the CPU 41 executes a velocity determination process.
Specifically, in the velocity determination process, the following process is executed. The CPU 41 calculates the acceleration of the change in the vibration level based on the sampling data of the three vibration levels before the time when the vibration level based on the output of the hex pickup exceeds Th1 (hereinafter referred to as “Th1 time”). To detect. Specifically, the first speed of the vibration level change is calculated based on sampling data one and two times before the Th1 time point. Further, the second speed of the vibration level change is calculated based on the sampling data two and three times before the Th1 time point. And based on the said 1st speed and the said 2nd speed, the acceleration of the change of a vibration level is detected. Further, the CPU 41 interpolates so that the velocity falls within the range of 0 to 127 in the dynamics of the acceleration obtained in the experiment.
Specifically, assuming that the velocity is “VEL”, the detected acceleration is “K”, the acceleration dynamics obtained in the experiment is “D”, and the correction value is “H”, the velocity is expressed by the following equation (1). ).
VEL = (K / D) × 128 × H (1)
Map (not shown) data indicating the relationship between the acceleration K and the correction value H is stored in the ROM 42 for each pitch of each string. When observing the waveform of a certain pitch of a certain string, the change in the waveform immediately after the string is removed from the pick has an inherent characteristic. Therefore, the correction value H is acquired based on the detected acceleration K by storing map data of this characteristic in the ROM 42 in advance for each pitch of each string. When the process of step S73 ends, the CPU 41 ends the advance trigger availability process.

[Advance trigger sound source processing]
FIG. 12 is a flowchart showing a preceding trigger sound source process (the process of step S64 in FIG. 10) executed in the electronic stringed instrument 1 according to the present embodiment.

First, in step S81, the CPU 41 acquires the initial pitch (SPt) recorded in the RAM 43 in step S49 of FIG. In step S <b> 82, the CPU 41 transmits a sound generation instruction to the sound source 45 with a predetermined master tone color and a pitch of the initial pitch (SPt) to the master channel (ch1) of the sound source 45. In step S83, the CPU 41 transmits a sound generation instruction to the sound source 45 with a predetermined slave tone color and a predetermined pitch on the slave channel (ch2) of the sound source 45.
In step S84, the CPU 41 reads out a slave waveform corresponding to the time required for the first cycle among the waveforms on the master side as shown in FIG. 19, and synthesizes the waveform on the master side and the waveform on the slave side. . That is, the waveform on the slave side is read by the length corresponding to one wavelength of the waveform on the master side. At this time, since the master tone has already been generated at the initial pitch (SPt) in step S82, the CPU 41 calculates the elapsed time of the first wavelength in advance at the start of the master tone generation. Further, the CPU 41 sets the read end address of the waveform of the musical tone on the slave side already sounded in step S83 so as to correspond to the calculated elapsed time. Furthermore, the CPU 41 reads out the waveform on the slave side and synthesizes it in synchronization with the first one wavelength of the waveform on the master side. The CPU 41 transmits a sound generation instruction to the sound source 45 based on the synthesized waveform.

[String vibration processing]
FIG. 13 is a flowchart showing a string vibration process (the process of step S32 in FIG. 8) executed in the electronic stringed musical instrument 1 according to the present embodiment.

  First, in step S91, the CPU 41 receives the output from the hex pickup 12, and acquires the vibration level of each string. In step S92, the CPU 41 executes normal trigger processing (described later in FIG. 14). In step S93, the CPU 41 executes a pitch extraction process (described later in FIG. 15). In step S94, the CPU 41 executes a mute detection process (described later in FIG. 16). When the process of step S94 ends, the CPU 41 ends the string vibration process.

[Normal trigger processing]
FIG. 14 is a flowchart showing a normal trigger process (the process in step S92 in FIG. 13) executed in the electronic stringed instrument 1 according to the present embodiment. The normal trigger is a sound generation trigger at the timing when a string is detected by the performer.

  First, in step S101, the CPU 41 determines whether or not a preceding trigger is possible. That is, the CPU 41 determines whether or not the preceding trigger flag is off. When it is determined that the preceding trigger is not possible, the CPU 41 shifts the processing to step S102. When it is determined that the preceding trigger is possible, the CPU 41 ends the normal trigger process. In step S102, the CPU 41 determines whether or not the vibration level of each string based on the output from the hex pickup 12 received in step S91 of FIG. 13 is greater than a predetermined threshold (Th2). If this determination is YES, the CPU 41 shifts the process to step S103, and if NO, the CPU 41 ends the normal trigger process. In step S103, the CPU 41 turns on the normal trigger flag in order to enable the normal trigger. When the process of step S103 ends, the CPU 41 ends the normal trigger process.

[Pitch extraction processing]
FIG. 15 is a flowchart showing the pitch extraction process (the process of step S93 in FIG. 13) executed in the electronic stringed instrument 1 according to this embodiment.

  In step S111, the CPU 41 extracts a pitch (Pt) by a known technique and determines a pitch. The determined pitch (Pt) is recorded in the RAM 43. Here, the known technique includes, for example, a technique described in Japanese Patent Laid-Open No. 1-177082.

[Mute detection processing]
FIG. 16 is a flowchart showing a mute detection process (the process of step S94 in FIG. 13) executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S121, the CPU 41 determines whether or not sound is being generated. If this determination is YES, the CPU 41 shifts the process to step S122, and if this determination is NO, the CPU 41 ends the mute detection process. In step S122, the CPU 41 determines whether or not the vibration level of each string based on the output from the hex pickup 12 received in step S91 of FIG. 13 is smaller than a predetermined threshold (Th3). If this determination is YES, the CPU 41 shifts the process to step S123, and if NO, the CPU 41 ends the mute detection process. In step S123, the CPU 41 turns on the mute flag. When the process of step S123 ends, the CPU 41 ends the mute detection process.

[Integration processing]
FIG. 17 is a flowchart showing an integration process (the process in step S33 in FIG. 8) executed in the electronic stringed musical instrument 1 according to the present embodiment. In the integration process, the result of the pressed string position detection process (the process of step S31 in FIG. 8) and the result of the string vibration process (the process of step S32 in FIG. 8) are integrated.

First, in step S131, the CPU 41 determines whether or not the preceding pronunciation has been completed. It is determined whether or not the preceding trigger flag is on. When it is determined that the preceding trigger flag is on, the CPU 41 shifts the processing to step S132. On the other hand, if it is not determined in step S131 that the preceding trigger flag is on, the CPU 41 shifts the processing to step S133. In step S133, the CPU 41 determines whether or not the normal trigger flag is on. If the normal trigger flag is on, the CPU 41 transmits a sound generation instruction signal to the sound source 45 in step S134, and the process proceeds to step S132. On the other hand, when the normal trigger flag is off, the CPU 41 shifts the processing to step S135.
In step S132, the CPU 41 executes pitch reflection processing (described later in FIG. 18). Thereafter, the CPU 41 shifts the processing to step S135.
In step S135, the CPU 41 determines whether or not the mute flag is on. If the mute flag is on, the CPU 41 transmits a mute instruction signal to the sound source 45 in step S136. When the mute flag is off, the CPU 41 ends the integration process. When the process of step S136 ends, the CPU 41 ends the integration process.

[Pitch reflection sound source processing]
FIG. 18 is a flowchart showing the pitch reflection sound source process (the process of step S132 in FIG. 17) executed in the electronic stringed instrument 1 according to the present embodiment.

First, in step S141, the CPU 41 determines whether the pitch extraction has succeeded and the pitch (Pt) has been determined. Specifically, the CPU 41 determines whether or not a pitch (Pt) is recorded in the RAM 43. If this determination is YES, the CPU 41 moves the process to step S142, and if NO, ends the pitch reflection sound source process. In step S142, the CPU 41 transmits an instruction signal to the sound source 45 so as to reflect the pitch (Pt) with respect to the musical sound that is sounded in advance from the master channel (ch1) of the sound source 45.
In step S143, the CPU 41 transmits an instruction signal to the sound source 45 so as to synchronize the read address of the waveform of the slave channel (ch2) of the sound source 45 at the timing of the pitch (Pt). That is, the read address and end address of the slave waveform are changed each time the pitch changes, and the master and slave are synchronized to cause the sound source 45 to sound.
Specifically, two sets of master channels and slave channels configured by the waveform data reading method are used, and the end address of the slave channel is controlled to match the waveform reading cycle of the master channel. This realizes an oscillator sync function in which the slave channel waveform returns to the start address in the same cycle as the master channel waveform. As a result, the oscillator synchronization effect can be realized by the waveform data reading method without incurring high product costs.

Heretofore, the configuration and processing of the electronic stringed instrument 1 of the present embodiment have been described.
In the present embodiment, the CPU 41 determines the pitch based on the string 22 where the string is detected and the fret 23 at the position where the string 22 is pressed, and in response to the detection of the string, Starts an operation to repeatedly read a master waveform and a slave waveform with different periods at a speed corresponding to the determined pitch, and reads the slave waveform repeated readout start timing in synchronization with the master waveform repeated readout start timing. The musical tone of the waveform obtained by this is generated, the vibration pitch of the string detected by the bullet string is detected, and the pitch used for the generation of the musical sound is corrected based on the detected vibration pitch.
Therefore, the oscillator synchronization effect can be realized by the waveform data reading method without incurring high product cost.

  As mentioned above, although embodiment of this invention was described, embodiment is only an illustration and does not limit the technical scope of this invention. The present invention can take other various embodiments, and various modifications such as omission and replacement can be made without departing from the gist of the present invention. These embodiments and modifications thereof are included in the scope and gist of the invention described in this specification and the like, and are included in the invention described in the claims and the equivalents thereof.

The invention described in the scope of claims at the beginning of the filing of the present application will be appended.
[Appendix 1]
A plurality of strings stretched on a fingerboard portion provided with a plurality of frets;
A string detection means for detecting that any of the plurality of strings is pressed at any position of the plurality of frets;
String detection means for detecting that one of the plurality of strings has been stringed;
Pitch determining means for determining a pitch based on a string in which the string is detected and a fret at a position where the string is pressed by the string detecting means;
In response to the detection of the string by the string detecting means, an operation of repeatedly reading out one period of the master waveform and the slave waveform having different periods at a speed corresponding to the pitch determined by the pitch determining means is started. And a musical tone generating means for generating a musical tone of a waveform obtained by reading the slave waveform repeated readout start timing in synchronization with the repeated readout start timing of the master waveform;
Pitch detection means for detecting the vibration pitch of the string detected by the string detection means;
Correction means for correcting the pitch used in the musical sound generation means based on the vibration pitch detected by the pitch detection means;
Electronic stringed instrument with
[Appendix 2]
A plurality of strings stretched on a fingerboard portion provided with a plurality of frets, and a string-pressing detecting means for detecting that one of the plurality of strings is pushed at any position of the plurality of frets; A musical tone generating method used for an electronic stringed instrument having a string detecting means for detecting that one of the plurality of strings has been played,
The pitch is determined based on the string where the string is detected and the fret where the string is pressed by the string detection means,
In response to the detection of the string, the master waveform and one slave waveform having different periods are started to be repeatedly read at a speed corresponding to the determined pitch, and the slave waveform is repeatedly read. To generate a musical tone of the waveform obtained by reading out in synchronization with the read start timing of the master waveform,
Detecting the vibration pitch of the detected string of the string;
A musical sound generating method for correcting the pitch used for generating the musical sound based on the detected vibration pitch.
[Appendix 3]
A plurality of strings stretched on a fingerboard portion provided with a plurality of frets, and a string-pressing detecting means for detecting that one of the plurality of strings is pushed at any position of the plurality of frets; A computer used for an electronic stringed instrument having a string detecting means for detecting that one of the plurality of strings has been struck,
A pitch determination step for determining a pitch based on the string in which the string is detected and the fret at the position where the string is pressed by the string detection means;
In response to the detection of the string, the master waveform and the slave waveform having different periods are started to be read repeatedly at a speed corresponding to the pitch determined by the pitch determining means, and the slave waveform A musical sound generating step for generating a musical tone of a waveform obtained by reading out the repeated reading start timing in synchronization with the repeated reading start timing of the master waveform;
A pitch detection step for detecting a vibration pitch of the detected string of the string;
A correction step of correcting the pitch used in the musical sound generation step based on the detected vibration pitch;
A program that executes

  DESCRIPTION OF SYMBOLS 1 ... Electronic string instrument, 10 ... Main body, 11 ... Normal pickup, 12 ... Hexa pickup, 13 ... Electronic part, 14 ... Cable, 15 ... Display part, 16 ...・ Bridge, 161 ... piece, 162 ... opening, 17 ... tremolo arm, 20 ... neck, 21 ... fingerboard, 22 ... string, 23 ... fret, 24 ... Neck PCB, 25 ... Elastic dielectric, 26 ... Electrostatic pad, 30 ... Head, 31 ... Thread winding, 51 ... X signal control unit, 52 ... Y signal control Part, 53 ... external sound source

Claims (3)

A plurality of strings stretched on a fingerboard portion provided with a plurality of frets;
A string detection means for detecting that any of the plurality of strings is pressed at any position of the plurality of frets;
String detection means for detecting that one of the plurality of strings has been stringed;
Pitch determining means for determining a pitch based on a string in which the string is detected and a fret at a position where the string is pressed by the string detecting means;
In response to the detection of the string by the string detecting means, an operation of repeatedly reading out one period of the master waveform and the slave waveform having different periods at a speed corresponding to the pitch determined by the pitch determining means is started. And a musical tone generating means for generating a musical tone of a waveform obtained by reading the slave waveform repeated readout start timing in synchronization with the repeated readout start timing of the master waveform;
Pitch detection means for detecting the vibration pitch of the string detected by the string detection means;
Correction means for correcting the pitch used in the musical sound generation means based on the vibration pitch detected by the pitch detection means;
Electronic stringed instrument with A plurality of strings stretched on a fingerboard portion provided with a plurality of frets, and a string-pressing detecting means for detecting that one of the plurality of strings is pushed at any position of the plurality of frets; A musical tone generating method used for an electronic stringed instrument having a string detecting means for detecting that one of the plurality of strings has been played,
The pitch is determined based on the string where the string is detected and the fret where the string is pressed by the string detection means,
In response to the detection of the string, the master waveform and one slave waveform having different periods are started to be repeatedly read at a speed corresponding to the determined pitch, and the slave waveform is repeatedly read. To generate a musical tone of the waveform obtained by reading out in synchronization with the read start timing of the master waveform,
Detecting the vibration pitch of the detected string of the string;
A musical sound generating method for correcting the pitch used for generating the musical sound based on the detected vibration pitch. A plurality of strings stretched on a fingerboard portion provided with a plurality of frets, and a string-pressing detecting means for detecting that one of the plurality of strings is pushed at any position of the plurality of frets; A computer used for an electronic stringed instrument having a string detecting means for detecting that one of the plurality of strings has been struck,
A pitch determination step for determining a pitch based on the string in which the string is detected and the fret at the position where the string is pressed by the string detection means;
In response to the detection of the string, the master waveform and the slave waveform having different periods are started to be read repeatedly at a speed corresponding to the pitch determined by the pitch determining means, and the slave waveform A musical sound generating step for generating a musical tone of a waveform obtained by reading out the repeated reading start timing in synchronization with the repeated reading start timing of the master waveform;
A pitch detection step for detecting a vibration pitch of the detected string of the string;
A correction step of correcting the pitch used in the musical sound generation step based on the detected vibration pitch;
A program that executes

Images