JP2014238553A - Musical sound generating device, musical sound generating method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate musical sound adapted to an actual plunk string.SOLUTION: An electronic stringed instrument includes a hex pickup 11, a CPU 41, and a sound source part 45. The hex pickup 11 detects vibration of each string generated by performing a plunk string operation on a plurality of stretched strings. The CPU 41 detects a direction of the plunk string on each string on the basis of the vibrating direction of each string detected by the hex pickup 11. Moreover, the CPU 41 discriminates rendition on the basis of the detected direction of the plunk string of each string. Moreover, the sound source part 45 generates musical sound based on the detected direction of the plunk string of each string and detected vibration of each of the plurality of strings.

Description

  The present invention relates to a musical sound generating device, a musical sound generating method, and a program.

  2. Description of the Related Art Conventionally, an input control device that extracts the pitch of an input waveform signal and instructs the pronunciation of a musical sound corresponding to the extracted pitch is known (Patent Document 1). In an electronic string instrument using such a technique, each string is detected by a hexa-pickup and played down as the level rises from the first string to the sixth string in sequence, and conversely from the sixth string to the first string. There was something that was judged to be playing up as the level went up.

JP-A-63-136088

However, when judged by the above-described method, there is a problem that it is not possible to detect a rendition method that reciprocates by skipping a string or a rendition method that simultaneously performs multiple strings by using a finger when playing a string.
In addition, from the viewpoint of playing a single note, when the above-described playing method is captured, it is impossible to detect from which direction (up or down) the string is played. For this reason, at present, although the string direction is different, no sound source that does not take into account the string direction is used, or an effect suitable for each direction is not added.

  The present invention has been made in view of such a situation, and an object of the present invention is to be able to generate a musical sound that matches an actual string.

In order to achieve the above object, a musical sound generator according to one aspect of the present invention is provided.
String vibration detecting means for detecting vibration of each string generated by string-operating a plurality of strings stretched;
A string direction detecting means for detecting a string direction for each string based on the vibration of each string detected by the string vibration detecting means;
A musical sound generating means for generating a musical sound based on the detected string direction of each string and the detected vibration of each of the plurality of strings;
Have

  According to the present invention, it is an object to be able to generate a musical sound according to an actual string.

It is a front view which shows the external appearance of the electronic stringed musical instrument which is one Embodiment of the musical tone generator of this invention. It is a figure for demonstrating the structure of a hex pickup. It is a figure for demonstrating up picking. It is a figure for demonstrating down picking. It is a block diagram which shows the hardware constitutions of the electronic part which comprises an electronic stringed instrument. 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 waveform detection process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the performance analysis process performed in the electronic stringed instrument which concerns on this embodiment. It is a figure for demonstrating a bullet pattern pattern map. It is a flowchart which shows the sound source and the effect control process performed in the electronic stringed instrument which concerns on this embodiment. It is a figure for demonstrating a sound source control parameter map and an effect parameter map. It is a flowchart which shows the modification of the waveform detection process performed in the electronic stringed instrument which concerns on this embodiment. It is a flowchart which shows the modification of the sound source and the effect control process performed in the electronic stringed instrument which concerns on this embodiment.

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

[Outline of electronic stringed instrument 1]
First, with reference to FIG. 1, an outline of an electronic stringed musical instrument 1 which is an embodiment of a musical sound generating apparatus of the present invention will be described.

  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 thin string 22 having the highest unique vibration frequency has 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 includes a bridge 15 to which the other end of the string 22 is attached, a hexapickup 11 that independently detects the vibration of each string 22, and a tremolo arm 16 for adding a tremolo effect to the sound to be emitted. And an electronic part 12 built in the main body 10 and a cable 13 for connecting each string 22 and the electronic part 12 to each other.

[Structure of hex pickup 11]
Here, the structure of the hexapickup 11 that acquires the vibration direction of each string 22 as an electric signal will be described.
FIG. 2 is a view for explaining the structure of the hex pickup 11. 2A is a diagram showing the appearance of the hexapickup 11, and FIG. 2B is a cross-sectional view taken along line AA in FIG. 2A.

In the electronic stringed instrument 1 of the present embodiment, a general hex pickup is used, for example, a humbucking magnetic pickup type pickup is employed. This hexapickup 11 detects the vibration of the string due to the string and converts it into an electric signal.
As shown in FIG. 2A, the hex pickup 11 is attached to the main body 10 on the lower side of the string 22, and a pickup 110 as a detection means is arranged in a row corresponding to each string 22 from the first string to the sixth string. Placed in.

As shown in FIG. 2B, the pickup 110 includes a cover 111, a magnet 112, a magnetic guide plate 113, a coil 114, a bobbin 115, and the like.
The cover 111 is made of sheet metal aluminum and includes a mechanism for detecting vibrations of the magnet 112, the coil 114, and the like.

  Above the magnet 112, an ABS resin bobbin around which an enamel coil 114 is wound is disposed. A wiring 116 from the coil to a PCB (Printed Circuit Board) is attached to the coil. The magnet 112 is an alnico magnet. Two magnetism plates 113 are disposed on the side of the magnet 112 with one end exposed from the cover 111. A spacer 117 is disposed between the magnetic guide plates 113.

  In the pickup 110 of the hex pickup 11 configured as described above, the magnetic field generated from the coil 114 changes due to the positional relationship between the string 22 and the pickup 110 being changed by the string. The vibration direction is acquired as an electric signal from the change in the magnetic field. Although the waveform direction of the electrical signal can be set freely, in this embodiment, when the string 22 approaches the pickup 110 by setting the wiring 116 and the like, the waveform in the plus direction is set to be detected. Is set to detect a waveform in the negative direction when moving away from the pickup 110.

  As described above, by acquiring the vibration direction of the string 22 as an electric signal, it is possible to detect the presence / absence of a string from the presence / absence of a waveform of the electric signal (hereinafter simply referred to as “waveform”) and the direction of the string from the waveform transition. It becomes.

Next, detection of the direction of the string will be described.
The direction of the string is detected by determining whether or not the acquired waveform indicating the vibration direction is a predetermined waveform.
There are two types of direction of the string: a direction by up picking and a direction by down picking. In an actual stringed instrument, the tone differs depending on the direction of the string.

  Here, the movement of the string 22 in up picking will be described. In this example, as in the case of down picking, a case where a string is played by a pick is shown as an example.

FIG. 3 is a diagram for explaining up-picking.
Up picking is performed by the player pulling up the string with a pick and removing the pick from the string when a predetermined string pull force is reached. By this operation, the pickup suddenly approaches the pickup side, so that the pickup generates power on the plus side.

  Specifically, as shown in FIG. 3A, the up picking is performed by scooping up the string 22 from below with a pick P and then playing the string 22. That is, in up picking, the string 22 is pushed up by the pick P from the original position where the non-stringed state is set, and the string 22 moves away from the pickup against the pulling force of the string 22. Then, by moving the pick P away from the string 22 and removing the string 22, the string 22 is released and moved in a direction approaching the pickup 110 that returns from the scooping position to the original position side. Thereafter, the string 22 moves around the original position and finally stops at the original position.

  The reason why the position change of the strings as described above is caused by the structure of the human hand or skeleton. For example, when the operation of returning the pedal of the bicycle is performed, the foot that moves the pedal moves so as to scoop up. If you move the pedal by hand, the movement will be the same. When trying to reciprocate a very small pedal with a fingertip, the string shifts in a direction in which the movement is easy and turns into a rotational movement according to the pedal. For this reason, many performers perform an up-picking operation as if the pedals are operated in reverse. Therefore, in up picking, the string is picked up by scooping up the string depending on the relationship between the string, wrist position, and pick position. On the other hand, in down picking, the operation of a string is pushed in.

When a string is played by up-picking, the string changes from the principle described above, so that a tone different from that of the string picked by down-picking is produced.
When the string position change in such up-picking is acquired as a waveform, the result is as shown in FIG. In other words, the waveform is generated slightly in the minus direction away from the pickup 110 by picking up the string 22 against the pulling force by the pick P. Note that such initial slight power generation in the negative direction in up-picking is called “pick noise”.
After that, by removing the pick P from the string 22, power is greatly generated in the positive direction to return to the original position from the scooping position by the pulling force of the string 22, and then converges by repeating the positive and negative directions until it returns to the original position. To go.

  On the other hand, the movement of the string in the down picking will be described. In this example, a case where a string is played by a pick is shown as an example.

FIG. 4 is a diagram for explaining the down picking.
Down picking is performed by an operation in which the performer depresses the pick with a pick and removes the pick from the string when a predetermined string pull force is reached. As a result of this operation, the pickup suddenly moves away from the pickup side, so that the pickup generates power on the minus side.

  Specifically, as shown in FIG. 4A, down picking is performed by pressing a string with a pick and then playing the string. That is, in the down picking, the string is pressed by the pick from the original position where it is in the non-stringed state, so that the string moves in a direction approaching the pickup against the tension of the string. Then, by moving the pick away from the string and playing the string, the string is released and moved in a direction away from the pickup side that returns from the depressed position to the original position side. After that, the string moves around the original position and finally stops at the original position.

When a string is played by down picking, the string changes from the above-described principle, so that a tone different from that of the string picked by up picking is produced.
When the change in the position of the string in such down picking is acquired as a waveform, the result is as shown in FIG. That is, the waveform is generated slightly in the plus direction by approaching the pickup 110 when the pick P pushes down the string 22 against the pulling force. Note that such a small amount of power generation in the initial positive direction during down picking is referred to as “pick noise”.
After that, by removing the pick P from the string 22, power is greatly generated in the minus direction to return from the pushed-down position to the original position by the pulling force of the string 22, and then converges by repeating the plus direction minus direction until returning to the original position. To go.

FIG. 5 is a block diagram illustrating a hardware configuration of the electronic unit 12.
As shown in FIG. 5, the electronic unit 12 includes a CPU (Central Processing Unit) 41, a ROM (Read Only Memory) 42, a RAM (Random Access Memory) 43, HEX, PU 11 (hereinafter, referred to as a hexa pickup 11). The operation unit 44, the sound source unit 45, the effect unit 46, and the sound system 47 are connected via a bus 48.

  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 RAM 43 stores various data such as a string waveform pattern, a string pattern pattern, a sound source control parameter map, and an effect parameter map, which will be described in detail later. The RAM 43 is provided with various setting flag data areas (string picking register areas) such as a picking direction flag and a string pattern flag.

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

  The tone generator 45 generates waveform data of a musical tone whose sound is instructed by, for example, MIDI (Musical Instrument Digital Interface) data.

  The effect unit 46 adds an acoustic effect to the waveform data of the musical sound generated by the sound source unit 45. In the present embodiment, the effect unit 46 adds acoustic effects such as a chorus that adds instability, a compressor that adds an inflection effect, and a reverb that adds a pitch effect to the musical sound waveform data.

  The sound system 47 outputs an audio signal obtained by D / A conversion (digital / analog conversion) of the waveform data acquired from the sound source unit 45 and the effect unit 46 to an external sound source, and issues an instruction to output a musical sound. . The external sound source includes an amplifier circuit (not shown) that amplifies and outputs the audio signal output from the sound system 47, and a speaker (not shown) that emits a musical sound using the audio signal input from the amplifier circuit. And).

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

  The operation unit 44 outputs input signals from various switches (not shown) provided in the main body 10 (see FIG. 1) to the CPU 41.

  The electronic stringed instrument 1 having the above-described configuration has a direction (hereinafter referred to as “string direction”) in which the string is played from a direction in which the string vibrates (hereinafter referred to as “vibration direction”) acquired from the hexapickup 11. It has a function of detecting and outputting a musical sound corresponding to the detected string direction. In addition, the electronic stringed instrument 1 has a function of comprehensively discriminating a performance style from the detected string direction of each of the first to sixth strings and generating a musical sound according to the discriminated performance style. Furthermore, the electronic stringed musical instrument 1 has a function that can add an acoustic effect (effect) to the generated musical sound from the detected string direction and the determined playing style.

[Main flow]
FIG. 6 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 a waveform detection process (described later in FIG. 7). In step S3, the CPU 41 executes a performance analysis process (described later in FIG. 8). In step S4, the CPU 41 executes a sound source / effect control process (described later in FIG. 10). When the process of step S4 ends, the CPU 41 shifts the process to step S2 and repeats the processes of steps S2 to S4.

[Waveform detection processing]
FIG. 7 is a flowchart showing a waveform detection process executed in the electronic stringed instrument 1 according to this embodiment.

  First, in step S11, the CPU 41 receives the output from the hex pickup 11, and acquires the vibration level of each string as a raw waveform (W).

In step S12, the CPU 41 has the absolute value (| W |) of the acquired waveform (W), which is the vibration level of each string based on the output from the hex pickup 11, larger than a predetermined threshold value (Th ₁ ). Determine whether or not. If this determination is YES, the CPU 41 shifts the process to step S13, and if NO, the CPU 41 ends the waveform detection process.

  In step S13, the CPU 41 determines whether or not the waveform is in the plus direction from the previous 0 cross. That is, based on the string waveform pattern shown in FIGS. 3B and 4B, it is determined whether or not the waveform at the position corresponding to the pick noise is in the plus direction. If this determination is YES, the CPU 41 shifts the process to step S14, and if NO, the CPU 41 shifts the process to step S15.

In step S14, CPU 41 is picking direction flag _{(P F),} set up picking (Up). When the process of step S14 ends, the CPU 41 ends the waveform detection process.

In step S15, CPU 41 is picking direction flag _{(P F),} set up picking (Up). When the process of step S15 ends, the CPU 41 ends the waveform detection process.
The picking direction flag (P _F ) set in step S14 or step S15 is stored for each string in a string picking register area provided in one area of the RAM 43.

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

First, in step S21, CPU 41, from the step S14 or each string picking direction flags set in step S15 in FIG. 7 _{(P F),} determining the Tamatsuru pattern. Specifically, the CPU 41 determines a string pattern based on the string pattern map stored in the RAM 43.

  In step S22, the CPU 41 sets a string pattern flag for the determined string pattern. When the process of step S22 ends, the CPU 41 ends the performance analysis process.

Here, the string pattern will be described.
FIG. 9 is a diagram for explaining a string pattern pattern map. A string pattern map for determining a string pattern is stored in the RAM 43.
The string pattern indicates the string direction of each string for determining the playing style. In the present embodiment, four string patterns are taken as an example.

The first string pattern is a pattern in which all strings from the first string to the sixth string are in the down (down) string direction, and the string is struck in order from the sixth string side having a low specific vibration frequency.
If it corresponds to the first string pattern, it is determined that the “pick-down performance method” is selected, and the string pattern flag is set to “1” indicating the pick-down performance method (first string pattern).

The second string pattern is a pattern in which all strings from the first string to the sixth string are in an up (Up) string direction and are stringed in order from the first string side having a high specific vibration frequency.
If it corresponds to the second string pattern, it is determined that the “pick-up performance method” is set, and the string pattern flag is set to “2” indicating the pick-up performance method (second string pattern).
In the present embodiment, when all strings are played from the same direction, it is determined that the picking performance is performed by using a pick instead of a finger.

In the third string pattern, the thin strings from the first string to the third string are all up (Up), and the thick strings from the fourth string to the sixth string are all down (Down). It is a pattern that becomes. That is, in the third string pattern, a group of strings (the first string to the third string) having a high specific vibration frequency among the plurality of strings stretched is up (Up), and the plurality of strings stretched. Among the strings, a group of strings (4th to 6th strings) having a low specific vibration frequency is down (Down).
If it corresponds to the third string pattern, it is determined that the fingering technique is used, and the string pattern flag is set to “3” indicating the fingering technique (third string pattern).
The “fingering playing method” is a playing method in which a string is played with a finger without using a pick or the like. In “Fingering”, a thick string from the 4th string to the 6th string is struck with the thumb, the 3rd string, which is a thin string, is indexed, the 2nd string is the middle finger, and the 1st string is struck with the ring finger. Play the string according to the rules. According to the rule of the finger of the string in “Fingering performance”, it is inevitably that the 4th string to the 6th string that is played with the thumb will be played down (Down), and from the 1st string Up to the third string will be played up (Up).
For this reason, in this embodiment, when all the strings correspond to the third string pattern that is not struck from the same direction, it is determined as “fingering technique”.

In the fourth string pattern, the natural vibration frequency of the first to third strings is high, and all the thin strings are in the down string direction, and the natural vibration frequency of the fourth to sixth strings is low. This is a pattern in which all thick strings are in the up (Up) string direction. That is, in the fourth string pattern, a group of strings (first to third strings) having a high specific vibration frequency among a plurality of strings stretched is down (Down), and the plurality of strings stretched. Among the strings, a group of strings (4th to 6th strings) having a low specific vibration frequency is up (Up).
If it corresponds to the fourth string pattern, it is determined that the “Apoyand playing method” is set, and the string pattern flag is set to “4” indicating the Apoyand playing method (fourth string pattern).
“Apoyand playing” is a playing technique used to obtain a louder sound and a clearer sound than when playing normal strings on a classical guitar, etc. Immediately after that, the performance is stopped on the next string.
For this reason, in this embodiment, when it corresponds to a 4th string pattern, it determines as an "apoyande performance method".

[Sound source / effect control processing]
FIG. 10 is a flowchart showing a sound source / effect control process executed in the electronic stringed instrument 1 according to the present embodiment.

  First, in step S31, the CPU 41 transmits a sound source control parameter corresponding to the string pattern flag to the sound source unit 45. Specifically, the CPU 41 transmits a sound source control parameter that matches the value of the string pattern flag selected from the sound source control parameter map stored in the RAM 43 to the sound source unit 45.

In step S <b> 32, the CPU 41 transmits an effect parameter corresponding to the string pattern flag to the sound source unit 45. Specifically, the CPU 41 transmits to the sound source unit 45 an effect parameter that matches the value of the string pattern flag selected from the effect parameter map stored in the RAM 43.
When the process of step S32 ends, the CPU 41 ends the sound source / effect control process.

Here, the sound source control parameter and the effect parameter will be described.
FIG. 11 is a diagram for explaining a sound source control parameter map and an effect parameter map. The sound source control parameter and the effect parameter are stored in the RAM 43 as a sound source control parameter map and an effect parameter map.

As shown in FIG. 11, the sound source control parameter is a parameter for assigning a sound source generated by each string in each string pattern.
Specifically, in the first string pattern showing the picking-down performance method, “distortion guitar” is assigned to all strings from the first string to the sixth string.
Further, in the second string pattern indicating the picking-up performance method, “clear electric guitar” is assigned to all the strings from the first string to the sixth string.
In the third string pattern that shows the fingering technique, "Acoustic guitar" is assigned to the thin strings from the first string to the third string, and "Acoustic bass" is assigned to the thick strings from the fourth string to the sixth string. Assign.
In the 4th string pattern, which shows how to play an apoyande, “Classic Guitar” is assigned to the thin strings from the 1st string to the 3rd string, and “Wood Bass” is assigned to the thick strings from the 4th string to the 6th string. assign.

The effect parameter is a parameter that assigns an effect to be added to the musical tone of all strings in each string pattern.
Specifically, in the first string pattern indicating the picking down performance method, the chorus is assigned to “chorus: OFF”, “compressor: OFF”, and “reverb: ON”.
In the second string pattern indicating the picking-up performance, the chorus is assigned to “ON”, “COMPRESSOR: ON”, and “Reverb: ON”.
Further, in the third string pattern showing the fingering performance method, the chorus is assigned to “chorus: ON”, “compressor: OFF”, and “reverb: ON”.
Further, in the fourth string pattern indicating the apoyande performance method, the chorus is assigned to “chorus: OFF”, “compressor: OFF”, and “reverb: ON”.

As described above, in the electronic stringed musical instrument 1, by assigning the sound source and the effect corresponding to the string pattern derived from the string direction, it is possible to obtain the performance effect when actually playing with each performance method. Also, even if a performer plays a string with a pick or a string with a finger, the sound source and effects suitable for the performance can be controlled simply by changing the direction of playing. For this reason, in the electronic stringed instrument 1, it is not necessary to set a sound source and an effect when a string is played with a pick or a finger, so that a switch operation or the like is unnecessary, and music performance can be performed without interruption.
Also, the electronic stringed instrument 1 can automatically provide appropriate sound settings even for beginners.

[Waveform detection processing (variation)]
FIG. 12 is a flowchart showing a modification of the waveform detection process (the process of step S2 of FIG. 6) executed in the electronic stringed instrument 1 according to the present embodiment.
The process of steps S41 and 44 is the same as the process of steps S11 and S12 in FIG.

In step S42, the CPU 41 determines that the absolute value (| W |) of the acquired waveform (W), which is the vibration level of each string based on the output from the hex pickup 11, is the first threshold value (Th ₁ ). It is determined whether the value is between the second threshold values (Th ₂ ). If this determination is YES, the CPU 41 shifts the process to step S43, and if NO, the CPU 41 ends the waveform detection process.

In step S43, the CPU 41 acquires the absolute value (| W |) of the acquired waveform (W) because the value is between the first threshold value (Th ₁ ) and the second threshold value (Th ₂ ). The acquired waveform is certified as pick noise. Then, the CPU 41 sets the direction of the certified pick noise in the noise flag (Noise). When the direction of the waveform of the pick noise is on the plus side, it is set as up (Up), and when the direction of the waveform of the pick noise is on the minus side, it is set as down (Down).

In step S45, since the acquired waveform is larger than the first threshold value (Th ₁ ), the CPU 41 recognizes it as a waveform other than pick noise (string waveform). Then, the CPU 41 determines whether or not the direction of the pick noise waveform is opposite. If this determination is YES, the CPU 41 shifts the process to step S46, and if NO, the CPU 41 ends the waveform detection process.

In step S46, the CPU 41 recognizes that the waveform has been correctly detected, and sets the picking direction flag from the waveform direction of the pick noise to up (Up) or down (Down). When the process of step S45 ends, the CPU 41 ends the waveform detection process.
In this modified example, if the direction of the waveform of the pick noise when the string is pulled by hitting the pick or finger and the direction of the waveform when the string is actually played are reversed, it is detected as the correct direction. For this reason, in the electronic stringed instrument 1, the accuracy of detection in the direction of the string can be increased.
In addition, since the electronic stringed instrument 1 uses the principle that the string moves in the direction opposite to the direction in which it was pulled, it is possible to accurately distinguish the direction of the string even when it is difficult to know whether the scooping or pushing is delicate. .

[Sound source / effect control processing (variation)]
FIG. 13 is a flowchart showing a modification of the sound source / effect control process (the process in step S4 in FIG. 6) executed in the electronic stringed instrument 1 according to the present embodiment.

  The processes in steps S51 and 52 are the same as the processes in steps S31 and S32 in FIG. That is, this process, which is a modified example of the sound source / effect control process, is obtained by adding processes after step S53.

  In step S53, the CPU 41 determines whether or not the string direction has changed to down. If this determination is YES, the CPU 41 shifts the process to step S54, and if NO, the CPU 41 shifts the process to step S55.

  In step S54, the CPU 41 instructs the sound source to increase the reverb addition time (reverb time). In this processing, for example, the reverb time is instructed to be 500 msec. When the process of step S54 ends, the CPU 41 ends the sound source / effect control process.

  In step S55, the CPU 41 instructs the sound source to shorten the reverb time. In this process, for example, the reverb time is instructed to be 100 msec. When the process of step S55 ends, the CPU 41 ends the sound source / effect control process.

  This modification is configured to change the length of the reverb each time the string direction is detected. For this reason, in the electronic stringed instrument 1, for example, when up picking is detected immediately after down picking, a long reverberation sound is produced when down picking is detected, and the reverberation is reverberating. With the up-picking immediately after, the performance that makes the melody stand out becomes possible. Further, in the electronic stringed musical instrument 1, by changing the sound setting in the direction of the string, rich musical expression can be achieved even when playing alone.

Heretofore, the configuration and processing of the electronic stringed instrument 1 of the present embodiment have been described.
In the present embodiment, the electronic stringed musical instrument 1 includes a hex pickup 11, a CPU 41, and a sound source unit 45.
The hex pickup 11 detects the vibration of each string generated by performing a string operation on a plurality of strings stretched.
The CPU 41 detects the string direction for each string based on the vibration direction of each string detected by the hex pickup 11. The sound source unit 45 generates a musical sound based on the detected string direction of each string and the detected vibration of each of the plurality of strings.
Therefore, the electronic stringed instrument 1 can output a musical sound that matches the actual string.

In the present embodiment, the CPU 41 determines a playing style based on the detected string direction of each string.
Therefore, the electronic stringed musical instrument 1 can output a musical sound in accordance with the actual playing method.

In the present embodiment, the electronic stringed instrument 1 is provided with an effect unit 46 that imparts to the generated musical sound a type of effect corresponding to the determined performance.
Therefore, in the electronic stringed instrument 1, an effect corresponding to the string operation can be added.

In the present embodiment, the sound source unit 45 instructs the connected external sound source to generate a musical tone of a type corresponding to the determined performance style.
Therefore, the electronic stringed instrument 1 can output a musical sound that matches the actual string.

In the present embodiment, each of the plurality of strings has a unique vibration frequency and is stretched in the order of the unique vibration frequency.
In addition, the CPU 41 determines whether or not the detected string direction is the same for each string. If the strings are in the same direction, the CPU 41 determines that the playing method is picking.
Therefore, the electronic stringed instrument 1 can generate a musical sound corresponding to the picking performance.

Further, in the present embodiment, the CPU 41 determines whether or not the string direction is from a string side having a high specific vibration frequency when it is determined as a picking technique, and the direction of the string side having a high specific vibration frequency is determined. Is determined to be a picking-up performance, otherwise it is determined to be a picking-down performance.
Therefore, the electronic stringed musical instrument 1 can generate musical sounds corresponding to the picking up performance method and the picking down performance method.

Further, in the present embodiment, the CPU 41 determines a group of strings having a high specific vibration frequency among a plurality of stretched strings when it is determined that not all the string directions of the detected strings are the same. It is determined whether or not the string direction is different between the string group having a low natural vibration frequency and the string direction for each of the two groups is the direction of the string side having a high specific vibration frequency or high. By discriminating whether the direction is the string side, it is discriminated whether the fingering performance method or the aboyando performance method.
Therefore, in the electronic stringed musical instrument 1, it is possible to generate musical sounds corresponding to the fingering performance method and the aboyando performance method.

  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 above-described embodiment, the playing style is determined based on the detected string direction of all strings. However, the present invention is not limited to this. For example, the rendition style may be determined when the string direction of a predetermined string that can be determined as a rendition style is detected.

  In the above-described embodiment, the string direction is detected from the vibration direction after pick noise or the pick noise and the vibration direction after pick noise. However, the present invention is not limited to this. For example, the string direction may be detected by predicting the subsequent vibration direction only with pick noise. In this case, the detection speed in the string direction can be increased.

  In the above-described embodiment, the direction of the string is detected each time the string is played, the playing style is determined, and the musical sound is generated and the effect is added. However, the present invention is not limited to this. For example, it may be configured such that the subsequent string direction and performance are determined from the initial string direction, and a musical sound is generated and an effect is added according to the string direction and performance.

  In the above-described embodiment, the picking down playing method, the picking up playing method, the fingering playing method, and the apoyand playing method are used as examples. However, the present invention is not limited to this. You may adopt a technique such as an albegio technique that plays in order. In the case of an albeggio playing technique, for example, it can be set in advance whether the playing technique is a picking technique or a fingering technique.

  Further, in the above-described embodiment, it is determined that the picking technique in which all strings are played from the same direction is played by using a pick instead of a finger. However, the present invention is not limited to this. For example, the picking performance method and fingering performance method may be determined using a threshold value or the like based on a difference in waveform between a pick string and a finger string.

  The series of processes described above can be executed by hardware or can be executed by software.

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. Further, the computer may be a computer that can execute various functions by installing various programs, for example, a general-purpose personal computer.

  The recording medium including such a program is configured by a recording medium provided to the user in a state of being incorporated in advance in the apparatus main body and distributed separately from the apparatus main body in order to provide the user with the program. The recording 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 incorporated in advance in the apparatus main body is configured by, for example, a hard disk included in the RAM 43 in FIG. 5 in which a program is recorded.

  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.

  As mentioned above, although several embodiment of this invention was described, these 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 equivalent scope thereof.

The invention described in the scope of claims at the beginning of the filing of the present application will be appended.
[Appendix 1]
String vibration detecting means for detecting vibration of each string generated by string-operating a plurality of strings stretched;
A string direction detecting means for detecting a string direction for each string based on the vibration of each string detected by the string vibration detecting means;
A musical sound generating means for generating a musical sound based on the detected string direction of each string and the detected vibration of each of the plurality of strings;
A musical sound generator.
[Appendix 2]
The musical sound generator is
The musical tone generating apparatus according to appendix 1, further comprising performance style discrimination means for discriminating a performance style based on the detected string direction of each string.
[Appendix 3]
The musical tone generating apparatus according to appendix 2, wherein the musical sound generating means includes effect applying means for applying an effect of a type corresponding to the discriminated performance style to the generated musical sound.
[Appendix 4]
4. The musical sound generating apparatus according to appendix 2 or 3, wherein the musical sound generating means includes a musical sound generation instructing means for instructing a connected sound source to generate a type of musical sound corresponding to the determined performance.
[Appendix 5]
Each of the plurality of strings has a unique vibration frequency and is stretched in the order of the unique vibration frequency.
The rendition style discrimination means includes first discrimination means for discriminating whether or not the detected string direction of each string is the same, and in the case of the same direction, the musical tone according to appendix 2 is discriminated as a picking performance style. Generator.
[Appendix 6]
The rendition style discrimination means further comprises second discrimination means for discriminating whether or not the string direction is from the string side where the natural vibration frequency is high when the rendition style is determined to be the picking performance style. The musical tone generating device according to appendix 5, wherein when the vibration frequency is determined to be in the direction of the high string side, it is determined as a picking-up performance, and otherwise it is determined as a picking-down performance.
[Appendix 7]
The rendition style discriminating means, when the first discriminating means discriminates that all of the string directions detected by the first discriminating means are not the same, among the plurality of strings stretched, the inherent vibration frequency It is determined whether or not the string direction is different between the group of strings having a high vibration frequency and the group of strings having a low natural vibration frequency. 7. The musical tone generator according to appendix 5 or 6, further comprising third discriminating means for discriminating between a fingering performance method and an aboyando performance method by discriminating between a direction and a high string side direction.
[Appendix 8]
A musical sound generating method used for a musical sound generating device having a string vibration detecting means for detecting vibration of each string generated by operating a string by strangling a plurality of stretched strings,
Based on the vibration of each detected string, the string direction for each string is detected,
A musical sound generating method for generating a musical sound based on a string direction of each detected string and a vibration of each of the detected plurality of strings.
[Appendix 9]
In a computer used for a musical sound generator having a string vibration detecting means for detecting vibration of each string generated by operating a string of a plurality of stretched strings,
A string direction detecting step for detecting a string direction for each string based on the detected vibration of each string;
A musical sound generation step for generating a musical sound based on the detected string direction of each string and the detected vibration of each of the plurality of strings;
A program that executes

  DESCRIPTION OF SYMBOLS 1 ... Electronic string instrument, 10 ... Main body, 11 ... HEX, PU (hexa pickup), 12 ... Electronic part 12 ... Cable, 15 ... Bridge 15 ... Tremolo arm, 20 ... Neck, 21 ... Fingerboard, 22 ... String, 23 ... Fret, 30 ... Head, 31 ... Spindle, 41 ... CPU, 42 ... ROM, 43 ..RAM, 44 ... operation unit, 45 ... sound source unit, 46 ... effect unit, 47 ... sound system

Claims (9)

String vibration detecting means for detecting vibration of each string generated by string-operating a plurality of strings stretched;
A string direction detecting means for detecting a string direction for each string based on the vibration of each string detected by the string vibration detecting means;
A musical sound generating means for generating a musical sound based on the detected string direction of each string and the detected vibration of each of the plurality of strings;
A musical sound generator. The musical sound generator is
2. The musical tone generator according to claim 1, further comprising performance style discrimination means for discriminating a performance style based on the detected string direction of each string.   3. The musical sound generating apparatus according to claim 2, wherein the musical sound generating means includes effect applying means for applying an effect of a type corresponding to the determined performance style to the generated musical sound.   4. The musical tone generation apparatus according to claim 2, wherein the musical tone generation means includes musical tone generation instruction means for instructing a connected sound source to generate musical sounds of a type corresponding to the determined performance style. Each of the plurality of strings has a unique vibration frequency and is stretched in the order of the unique vibration frequency.
The said performance style discrimination means has a 1st discrimination means to discriminate | determine whether all the string directions of the said each detected string are the same, and when it is the same direction, it discriminate | determines from the picking performance style. Music generator.   The rendition style discrimination means further comprises second discrimination means for discriminating whether or not the string direction is from the string side where the natural vibration frequency is high when the rendition style is determined to be the picking performance style. 6. The musical tone generator according to claim 5, wherein when the vibration frequency is determined to be in the direction of the high string side, the picking-up performance is determined, and otherwise, the picking-down performance is determined.   The rendition style discriminating means, when the first discriminating means discriminates that all of the string directions detected by the first discriminating means are not the same, among the plurality of strings stretched, the inherent vibration frequency It is determined whether or not the string direction is different between the group of strings having a high vibration frequency and the group of strings having a low natural vibration frequency. The musical tone generator according to claim 5 or 6, further comprising third discriminating means for discriminating between a fingering performance method and an avoyand performance method by discriminating between a direction and a high string side direction. A musical sound generating method used for a musical sound generating device having a string vibration detecting means for detecting vibration of each string generated by operating a string by strangling a plurality of stretched strings,
Based on the vibration of each detected string, the string direction for each string is detected,
A musical sound generating method for generating a musical sound based on a string direction of each detected string and the detected vibration of each of the plurality of strings. In a computer used for a musical sound generator having a string vibration detecting means for detecting vibration of each string generated by operating a string of a plurality of stretched strings,
A string direction detecting step for detecting a string direction for each string based on the detected vibration of each string;
A musical sound generating step for generating a musical sound based on a string direction of each detected string and the detected vibration of each of the plurality of strings;
A program that executes

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