JP2006162904A - Sound generation control method based on performance operation prediction, and electronic musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize an ensemble in an environment where there is delay in communication. <P>SOLUTION: An electronic percussion instrument 1 detects a position and speed of a stick by using magnetic sensors 21 attached to a strike face 22 and a magnet 20 embedded at the tip part of a stick 18 manipulated by a user, and determines that the instrument is already in the performance state when the position is inside a determination surface and the speed is not slower than a predetermined speed, and starts producing performance information. Firstly, the instrument calculates predicted access and predicted speed of the stick 18. The instrument 1 produces the performance information by determining sound production timing and velocity from the calculated predicted access time and predicted speed, respectively. Secondly, the instrument 1 determines transmission time of the performance information based on the predicted access time and a delay amount of a communication network, and transmits the performance information to electronic instruments of ensemble partners through the communication network at the arrival of the time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for predicting a performance action of a player of an electronic musical instrument and controlling generation of musical sounds based on a prediction result.

  With the recent development of communication networks, there is an increasing need for ensemble systems that can perform ensembles (sessions) with a plurality of electronic musical instrument terminals that are located at geographically distant points and are connected via a communication network. In such an ensemble system, if a plurality of persons participating in the ensemble are in charge of each performance part of one piece of music, each participant can listen to the ensemble sound at the electronic musical instrument terminal of each participant. The generated performance information (pitch, volume, timbre, etc.) must be sequentially transmitted to the electronic musical instrument terminals of all other participants. For the first time in this way, each participant's electronic musical instrument terminal can obtain performance information of all the parts making up the music, and can perform an ensemble according to the performance information.

  However, a normal ensemble cannot be performed in each electronic musical instrument terminal simply by spreading the performance information of each part to each electronic musical instrument terminal. An ensemble is to play your instrument while listening to the sound of other ensemblers. Therefore, when each part is played according to the performance information, the sound generation timing of each part must be synchronized. There is. Here, in a normal ensemble performed at the same place, since the sound played by the ensemble participant immediately reaches the ears of all the ensemble participants, it is unlikely that a problem will normally occur in the sound generation timing of each part. However, for example, when performing an ensemble by connecting the musical instrument A and the musical instrument B via a communication network, it takes a certain finite time to reach the electronic musical instrument B after transmitting performance information in the musical instrument A. The performer of instrument B will hear the performance sound with a delay. The performer of the musical instrument B performs in accordance with the delayed sound, but a delay occurs again until the performance information of the musical instrument B reaches the musical instrument A. As a result, the sound generation timings of the sounds of the parts that must be simultaneously generated in the musical instruments A and B are shifted. When a general-purpose communication network such as the Internet is used, this difference may be several tens of milliseconds to 1 second, and it is difficult to establish a normal ensemble. Thus, when performing an ensemble through a communication network, it is necessary to consider the network delay which inevitably occurs.

  Under such a background, there is a technique for recording and reproducing a performance while compensating for a communication delay using electronic musical instrument terminals at two points connected to a network (see, for example, Patent Document 1). Specifically, time information is added to the accompaniment signal at point A and transmitted to point B, time information is added to the performance signal played along with the accompaniment signal at point B, and sent back to point A. A When this is received at a point, the sound generation timing of the performance at both points is corrected and recorded based on the added time information. However, the technique of Patent Document 1 merely delays the sound generation timing of the performance sound of the own musical instrument terminal in accordance with performance information that arrives late from the performance partner, and this does not synchronize the performance in real time. Can not.

JP-A-7-121161

  The present invention has been made in view of the above-described background, and an object thereof is to provide a method and an electronic musical instrument for realizing an ensemble in an environment where communication delay occurs.

  In order to solve the above-described problem, the present invention provides an electronic musical instrument having a hit detection unit that detects contact with an operator operated by a user, and the operation before the operator reaches the hit detection unit. Based on the motion state detected by the acquisition means, the detection means for detecting the motion state of the child, the prediction means for predicting the motion state of the manipulator when reaching the hit detection unit, and predicted by the prediction means There is provided an electronic musical instrument having generating means for generating performance information in accordance with the exercise state. According to the electronic musical instrument of the present invention, performance information is generated using the predicted motion state before the operation element reaches the hit detection unit. This can be provided to an external electronic musical instrument or the like. That is, since performance information is generated prior to completion of the performance operation, it is possible to control the provision timing of the performance information so as to compensate for communication delay.

  In a preferred aspect, the present invention is an electronic musical instrument having a hit detection unit that detects contact with an operator operated by a user, and at a certain time before the operator reaches the hit detection unit, Detecting means for detecting the position and speed of the operating element; and predicting means for predicting the time at which the operating element reaches the hit detection unit and the speed at the time of arrival based on the position and speed detected by the detecting means; There is provided an electronic musical instrument having generation means for generating performance information according to the time and speed predicted by the prediction means.

  In another preferred aspect, the present invention calculates the speed of the manipulator based on detection means for detecting the position of the manipulator, a plurality of positions detected by the detection means, and detection times of the positions. Based on the calculation means, the position of the operation element detected by the detection means, determination means for determining whether or not the operation element has entered a predetermined area, and Only when it is determined that the vehicle has entered the predetermined area, a prediction unit that predicts a time at which the operating element reaches the hit detection unit based on a speed calculated by the calculation unit, and a prediction in the prediction unit The electronic musical instrument has a generating means for generating performance information by determining the sound generation timing and velocity from the calculated time and the speed calculated by the calculating means, respectively. To.

  In another aspect, the present invention provides a method for generating performance information in an electronic musical instrument having a hit detection unit that detects contact with an operator operated by a user, and the operator reaches the hit detection unit. A motion state detecting step for detecting a motion state of the operating element before performing the motion, and a motion for predicting the motion state of the manipulator when reaching the hit detection unit based on the motion state detected in the motion state detecting step There is provided a performance information generation method including a state prediction step and a generation step of generating performance information according to the motion state predicted in the motion state prediction step.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the functional configuration of an electronic percussion instrument 1 according to an embodiment of the present invention. First, the outline of the configuration and operation of the electronic percussion instrument 1 will be described with reference to FIG. The electronic percussion instrument 1 includes a drum stick (hereinafter simply referred to as a stick) held by a user and a percussion instrument body including a percussion surface. In the following, it is assumed that an ensemble is performed using the electronic percussion instrument 1 and the electronic instrument X.

  As shown in FIG. 1, the electronic percussion instrument 1 includes a control unit 10, a position detection unit 11, a hit detection unit 12, a sound generation unit 13, a storage unit 14, a communication unit 15, a timer 16, and a bus 17 that connects the units. And a stick 18 held by the user. The control unit 10 is composed of a CPU and various other arithmetic processors, controls each part of the electronic percussion instrument 1, and determines musical performance information (sounding timing and velocity) to be generated based on information obtained from each part of the electronic percussion instrument 1. To do. The position detection unit 11 includes a sensor device, detects the position of the stick 18, and supplies the detected position to the control unit 10. The hit detection unit 12 includes a sensor device such as a pressure sensor provided on the hitting surface and an analysis circuit for the sensor signal. The timing at which the stick touches the hitting surface, the pressure applied to the hitting surface when touched, and the like. Is detected and supplied to the control unit 10. The sound generation unit 13 includes a sound signal processing circuit such as a DSP (Digital signal processor) and a musical sound generation device such as a speaker, and generates a musical sound according to an instruction from the control unit 10. A general electronic percussion instrument includes a hit detection unit 12, a control unit 10, and a sound generation unit 13.

  The storage unit 14 is a storage device such as a RAM, ROM, EEPROM, or HDD, and stores data necessary for determining performance information. The communication unit 15 has a communication interface and the like, and transmits performance information generated by the electronic percussion instrument 1 to another electronic musical instrument via a communication line under the instruction of the control unit 10, while the other electronic musical instrument generates Receive performance information. This allows multiple electronic musical instruments to be connected to each other via a network to exchange performance information, so that sounds based on the performance of their own electronic musical instruments can be pronounced on other electronic musical instruments, or conversely Sounds can be generated with their own electronic musical instruments. The timer 16 is a time measuring mechanism for generating a reference time for determining sound generation timing and the like.

  Next, a method in which the position detection unit 11 detects the position of the stick 18 will be described with reference to FIGS. FIG. 2A shows a state in which the user is performing using the electronic percussion instrument 1. As shown in the figure, a magnet 20 is embedded in the tip (tip) of the stick 18. 2B and 2C are an overhead view and a side view of the position detection unit 11, respectively. The position detection unit 11 includes magnetic sensors 21 provided at the four corners of the striking surface 22 and analysis circuits (not shown) for analyzing electric signals from the respective sensors. Now, assuming that the stick held by the user is positioned above the striking surface 22, each magnetic sensor 21 outputs an electrical signal having a strength corresponding to the position of the magnet 20 embedded in the stick. Since the strength of the electric signal serves as an index representing the distance between the magnetic sensor 21 and the magnet 20, the magnetic sensor 21 calculates a total of four distances from the magnet 20 to the magnetic sensor 21. The analysis circuit grasps the installation positions of all the magnetic sensors 21 in advance, and determines one point in the three-dimensional space of the magnet 20 (that is, the tip of the stick 18) from these positions and the calculated distance. Hereinafter, for convenience of explanation, one point in the three-dimensional space determined in this way is referred to as “position of the stick 18”.

  Next, a method for generating performance information based on the detected position of the stick 18 will be described with reference to FIG. First, when the position of the stick 18 is detected at a certain time as described above, the information is stored in the RAM or the like of the storage unit 10 (step S100). Subsequently, in step S101, it is determined whether or not a predetermined number of stored location information has been accumulated. If the predetermined number is not accumulated (step S101, NO), the process returns to step S100 to acquire and store the position information again. As described above, when a predetermined number of pieces of position information are accumulated (buffered) (YES in step S101), the process proceeds to step S102, where it is determined whether or not to enter performance information generation processing. Specifically, the following determination is performed.

  First, it is determined from the obtained position information whether or not the distance between the stick 18 and the striking surface 22 is equal to or less than a predetermined value. Hereinafter, for the sake of convenience of explanation, a virtual surface that is located above the striking surface 22 and is defined as having a predetermined distance from the striking surface 22 will be referred to as a “determination surface”. That is, it is confirmed whether or not the stick 18 is positioned on the striking surface side with respect to the determination surface. The reason for using this determination surface is, for example, when there is a stick 18 above the performer, and if the arrival time to the striking surface 22 of the stick 18 or the speed at the time of arrival is predicted based on the position, an error will occur. This is because it becomes large and it is difficult to predict with high accuracy. In addition, for example, there is a possibility that the player stops the striking operation when the stick 18 reaches near the chest. In such a case, performance information should not be generated erroneously. . In this way, in order to prevent malfunction and predict the behavior of the stick 18 with high accuracy, the performance information generation process is started only when the stick 18 is positioned below the determination surface. Further, it is determined whether or not the Z coordinate (vertical position) of the stick 18 tends to decrease with time from the obtained position information, and the performance information generation process is started only when it tends to decrease. That is, it is determined whether the stick 18 is moved from the upper side to the lower side or vice versa. If it is determined that the player is moving from the upper side to the lower side, the player is in the process of swinging down the stick 18 toward the striking surface 22, and the performance information generation process is started. When moving from the lower side to the upper side, it is considered that the operation after the hitting is in progress, and it cannot be determined whether or not the next hitting will be performed. Therefore, the performance information generation process is not performed. Next, the speed of the stick 18 is calculated from the obtained position information, it is determined whether or not the speed exceeds a certain threshold value, and the performance information generation process is started only when the speed is equal to or greater than the threshold value. Normally, it is considered that the speed of the stick 18 during a performance operation at a predetermined distance from the striking surface 22 takes a value greater than a certain value, and when the stick 18 moves more slowly than this, the player is Since it is presumed that the player is not willing to hit or the player is not in the striking position, the performance information generation process is not performed.

  In this way, when it is recognized that the user has entered the performance operation and it is determined to start the performance information generation process (YES in step S102), the current position of the current stick 18 is determined from the obtained position information. The time predicted to reach the striking surface 22 from the position (hereinafter referred to as the predicted arrival time) and the speed of the stick 18 when reaching the striking surface (hereinafter referred to as the predicted speed) are determined (step S103). For example, most simply, it can be approximated that the acceleration of the stick 18 is zero. In this case, the speed of the stick 18 is always constant, and the speed detected at the position is equal to the predicted speed. As an example, the estimated arrival time can be calculated by regarding the traveling direction of the tip of the stick 18 as being substantially perpendicular to the striking surface 22 and dividing the distance from the position to the striking surface 22 by this speed. it can. For example, the distance from the striking surface 22 to the determination surface is “15 cm” on the determination surface, the performance information generation process is started on the determination surface, and the speed of the stick 18 detected at this position is “3 m / s”. If so, the predicted arrival time is calculated as 50 ms later. Therefore, the timing at which the electronic musical instrument 1 actually produces a sound is determined as “50 ms later”.

  The storage unit 14 includes, as an example, a table shown in FIG. 4 in which the velocity value of the stick 18 and the velocity value corresponding thereto are stored in association with each other. For example, if the predicted speed is “2.5 m / s”, the control unit 10 refers to this table and determines the velocity value as “100”. In this way, when the sound generation timing of the musical sound to be generated corresponding to the performance is determined from the predicted arrival time and the velocity value of the musical sound to be generated is determined from the predicted speed, the performance to be transmitted to the electronic musical instrument X is determined. Information is generated (step S104).

  Then, it progresses to step S105 and the timing which should transmit the said performance information is determined (step S105). Specifically, the control unit 10 refers to the network delay amount stored in the storage unit 14 and determines a transmission time according to the delay amount. The control unit 10 transmits the performance information when the determined time arrives (step S106).

  The determination of the transmission time described above will be described in detail with reference to FIG. At time t = 0, the predicted arrival time and the predicted speed are calculated (step S201), and the predicted arrival time at this time is t2. It is also assumed that the network delay amount read from the storage unit 14 is ΔT. This delay amount ΔT is the time until the transmitted performance information is received by the electronic musical instrument that is the ensemble partner and returns to the electronic percussion instrument 1 again. Assuming that the transmission time is t1, in order to establish an ensemble, it is expected that the actual performance will be performed when the performance information generated based on the predicted performance action returns from the ensemble partner via the network. Since it must be equal to the time, the relationship of t2 = t1 + ΔT is established. Therefore, the transmission time t1 can be obtained by t1 = t2−ΔT. When t2 <ΔT, that is, when the delay amount of the network is larger than the predicted arrival time of the stick, t1 = 0 is set. In other words, performance information is transmitted immediately, and the delay in providing performance information due to network delay is minimized.

  The performance information transmitted at time t1 determined in this way (step S202) is received by the electronic musical instrument X at time t1 + ΔT / 2 considering the network delay ΔT / 2 (step S203). In the electronic musical instrument X, when performance information is received, musical tone generation processing is performed according to the performance information, and the sound of the electronic percussion instrument 1 is generated. The performer of the electronic musical instrument X performs with the electronic musical instrument X in accordance with the performance sound, and also generates performance information representing the performance by the own musical instrument and transmits it to the electronic percussion instrument 1 (step S203). Considering the network delay ΔT / 2 again, at time t1 + ΔT / 2 + ΔT / 2 = t2, the electronic percussion instrument 1 receives performance information from the electronic musical instrument X and performs sound generation processing according to the performance information (step S204). . At this time, the stick 18 reaches the striking surface 22, and as a result, processing is performed in the striking detection unit 12, the control unit 10, and the sound generation unit 13, respectively. Processing is performed. In this way, a musical sound played on the electronic percussion instrument 1 (for example, an accompaniment sound) and a musical sound played on the electronic musical instrument X (for example, a melody sound by an electric guitar) are pronounced on the electronic percussion instrument 1 at the same time. become. As apparent from FIG. 5, both the player of the electronic percussion instrument 1 and the player of the electronic instrument X perform without being aware of the communication delay difference. Thus, according to the present embodiment, ensemble is established even in an environment where communication delay exists.

  As described above, according to the present embodiment, the arrival time and predicted speed of the stick 18 are predicted, and based on this prediction, performance information is generated before the performance operation is completed, and the delay amount of the communication network is calculated. Since it can be provided to the ensemble partner at the same timing, even if it is a plurality of geographically separated electronic devices connected by a communication network, ensemble can be performed normally regardless of the communication delay that inevitably occurs Is possible.

<Modification>
The present invention is not limited to the above-described embodiments, and can be modified or modified. An example is shown below.

  Musical sounds generated by the electronic percussion instrument 1 have been subjected to performance information generation processing based on actual performance. That is, the performance information generation processing time (sound generation timing) is the time when the stick 18 reaches the striking surface 22, and the velocity value is determined based on information detected by a sensor function attached to the striking surface 22. However, the musical tone generation process may be performed based on performance information (that is, predicted arrival time and predicted speed) transmitted to the electronic musical instrument X. That is, the performer of the electronic percussion instrument 1 hears the sound generated based on the predicted performance operation, not the sound actually played, but the performance information is based on these predicted values unless the prediction error becomes large. Even if the generation process is performed, the sounding timing does not feel strange.

  The determination condition for starting the performance information generation process is not limited to the above embodiment, and can be freely set. For example, regarding the setting method of the judgment surface, when the network delay amount is large, the time for delaying performance information is secured by increasing the height of the judgment surface, and when the delay amount is small, the height of the judgment surface is set. It is preferable to lower it to improve the prediction accuracy.

  Moreover, the kind and number of sensors mentioned above are arbitrary. For example, a sensor for measuring the position and a sensor for detecting the speed may be provided separately. For example, in addition to the magnetic sensor 21 provided in the main body of the electronic percussion instrument 1, a gravity sensor or an acceleration sensor is provided on the stick 18. Then, information such as the speed acquired by the stick 18 is transmitted to the main body of the electronic percussion instrument 1 by wireless communication, and the electronic percussion instrument 1 uses these pieces of information to calculate a predicted time and a predicted speed. For example, if priority is given to prediction accuracy, the number of sensors and the number of buffering may be increased, and if priority is given to the calculation amount and calculation time, the number of sensors, the number of buffering, and the data amount of the table may be reduced. The sensor mounting position is not limited to the tip (chip) of the stick 18. For example, if sensors are provided in other parts of the stick 18 as well, information such as the angle and angular velocity of the stick 18 can be obtained. Therefore, the predicted arrival time and the like can be calculated with higher accuracy using such information. it can. Further, for example, two determination surfaces are set, and the performance information generation process is started when passing through a determination surface having a large distance from the hit detection surface, and the position, speed, and acceleration of the stick 18 until the other determination surface is reached. Etc. continue to be detected. That is, the behavior of the stick 18 is detected for a certain period. As described above, the prediction accuracy can be further improved by increasing the collection amount of the information related to the motion state of the stick 18. In the above-described embodiment, the performance information generation process is started only when the stick 18 is located on the striking surface side with respect to the determination surface. However, the present invention is not limited to this, and the stick 18 is on the determination surface or the determination surface. You may comprise so that a performance information generation process may be started only when located in a predetermined distance from a surface. Further, a determination surface for determining the start of the performance information generation process and a determination surface for detecting the speed of the stick 18 at the position may be provided separately. In the above embodiment, the determination surface is defined as a surface at a predetermined distance from the striking surface. However, the present invention is not limited to this. For example, the determination surface is a surface that is equidistant from the center of the striking surface (that is, a hemispherical surface). The tone generation process may be started when it is defined that the stick has entered the hemisphere.

  Also, the predicted arrival time and predicted speed calculation algorithms are not limited to those shown in the above embodiment. In the above embodiment, the acceleration of the stick 18 is zero, and the traveling direction of the tip of the stick 18 at the detection position is approximated to be perpendicular to the striking surface 22. However, in addition to the speed at the detection position, the acceleration is increased. The predicted speed may be calculated using this acceleration. Alternatively, a table storing the predicted arrival time and the predicted speed in association with the position and speed is stored in the storage unit 13 without referring to the acceleration, and the predicted arrival time and the predicted speed are determined with reference to this table. May be.

  Further, the contents of data stored in such a table can be freely set by the user. For example, a plurality of tables having different velocity values may be provided in accordance with the types of sticks 18 that can be used by the user (the shape of the tip, the overall weight, etc.). This is because, if the stick 18 is different, the arrival time and the speed at the time of arrival can be changed slightly. In this case, when the user designates the type of the stick 18, the control unit 10 reads and uses a table corresponding to the stick.

  In the embodiment described above, the magnet 20 is provided on the stick 18, while the magnetic sensor 21 and the analysis circuit for analyzing the output signal from the magnetic sensor are provided in the main body of the electronic hitting device 1. For example, the magnets 20 may be installed at the four corners of the striking surface 22, and the stick 18 may be provided in the position detection unit 11 including a magnetic sensor and an analysis circuit. In this case, the distance and speed are calculated by the stick 18, and musical tone generation of the sound generating unit 13 of the electronic percussion instrument 1 or an external speaker system is performed using a wireless transmission circuit in which the information on the distance and speed is embedded in the stick 18. It may be transmitted wirelessly to the device.

  In the performance information transmission time determination described above, the performance information generation timing and the musical sound generation timing are considered to be the same, but strictly speaking, the calculation of the predicted arrival time and the predicted speed requires a finite time. Therefore, when higher-accuracy delay correction is required, the transmission time of the musical sound information may be determined in consideration of the time lag from the start of the performance information generation process to the transition to the musical sound generation process.

  As a method for acquiring the delay amount, for example, measurement may be performed using ping (Packet Internet Groper), which is a network diagnostic program used in the TCP / IP network, immediately before starting the ensemble. Further, the performance is actually performed using the delay amount measured in this way, and the generation timing of the musical sound generated when the stick 18 actually reaches the striking surface 22 and the performance information received from the performance partner are recorded. The sound generation timings of the musical sounds generated based on the comparison may be compared to check whether they are appropriate values. If the acquired delay amount correctly reflects the actual network delay state, both are sounded simultaneously, otherwise the sounding timing is shifted. Note that the musical sound generated based on the predicted performance information may be compared with the performance information received from the opponent.

  Further, the detection of the timing shift may be performed using the sound actually heard by the performer, and the delay amount may be manually corrected. In this case, this operation is repeated until the difference in pronunciation timing cannot be recognized. Alternatively, this correction work may be performed by the electronic percussion instrument 1. For example, the time when the performance information is received from the electronic musical instrument of the opponent is compared with the time when the stick 18 reaches the striking surface 22, and if there is a time lag, the performance information is transmitted by changing the delay amount by a predetermined value. And compare. This is repeated, and when there is no deviation, the correction of the delay amount is finished.

Furthermore, the above-described delay amount correction work may be performed not only before the performance but also during the performance, for example. For example, at a predetermined time interval, the electronic percussion instrument 1 is made to perform the above-described comparison operation using performance information that is being performed. Then, the delay amount may be corrected when the time difference exceeds a certain threshold value, and the corrected delay amount may be used in determining the subsequent performance information transmission timing. As an example of the delay amount correction method, the time from when the predicted arrival time is calculated until the stick 18 reaches the striking surface 22 is α, and the time until the performance information returns from the ensemble partner via the network is β, Assuming that the delay amount stored in the storage unit 14 at time n is ΔT _n and the allowable error amount is C, when | α−β |> C, the new delay amount ΔT _{n + 1 is changed} to ΔT _{n + 1.} Reset to = (ΔT _n + β) / 2. In this way, if the delay amount ΔT can be varied, an ensemble can be established even in an environment where the network state varies with time.

Moreover, in the said Example, although performing the ensemble via a network using the electronic percussion instrument 1 was considered, the electronic percussion instrument 1 can also be used independently. For example, instead of performing performance information generation processing when the stick 18 actually reaches the striking surface 22, performance information is created by correcting only a desired value from the calculated predicted arrival time and predicted speed, and based on this Perform pronunciation. At this time, performance information is not generated based on actual arrival at the striking surface 22. In this way, the sound generation timing, velocity, etc. can be freely adjusted according to the user's preference.
Of course, it is possible not only to perform the tone generation process at a timing earlier than the predicted arrival time, but also to perform the tone generation process at a timing later than the predicted arrival time. Alternatively, a musical sound is generated based on both the arrival time and speed predicted based on the information on the stick 18 on the determination surface and the arrival time and arrival speed to the hitting surface 22 detected by the hitting detection unit 12. Also good. By generating performance information using the predicted values in this way, it is possible to freely create sound generation characteristics that are not found in conventional acoustic percussion instruments and electronic percussion instruments.

  Further, the following usage method is also conceivable. In general, in order to accurately record a rhythm with a constant rhythm and a constant strength with a percussion instrument, it is always necessary to perform a constant stick operation (stroke operation). In other words, it is ideal to keep a certain performance form. However, it is difficult for the performer to notice the disorder of his form. Therefore, the electronic percussion instrument 1 is used to correct the performance form. That is, if the performance form is constant, the stick 18 should always repeat the same behavior, and naturally, the speed of the stick 18 on the determination surface should always be constant. As a result, the predicted arrival time and the predicted speed The musical sound generated based on this should always be constant. However, when the performance form is disturbed, even if the timing and speed generated on the striking surface are actually constant, the speed of the stick 18 on the determination surface varies. As a result, the generated musical sound also varies. Will come out. Therefore, if a performer listens to a musical tone, he / she will notice the disorder of his / her form. It is expected that a regular performance form will be acquired by repeating such practice with various judgment aspects.

  The present invention is suitable for electronic percussion instruments such as drums and drums, but is not limited thereto. For example, the present invention is applicable not only to percussion instruments such as drums and cymbals that perform by operating a foot pedal, but also to electronic musical instruments having a keying mechanism such as an electronic piano. In this case, for example, the magnet 20 may be attached to the tip of the hammer of each key whose performance is to be predicted, and the magnetic sensor 21 may be attached to the hammering surface. Alternatively, an optical shutter may be attached to the determination surface, and the timing and speed of the hammer passing through the determination surface may be detected. In short, if information such as the position and speed of an operator such as a hammer can be acquired before a performance is actually performed (that is, a stick or hammer reaches the striking surface) and a performance information generation process and a sound generation process are performed, Good.

It is a lineblock diagram of electronic percussion instrument 1 concerning the present invention. It is the figure which showed a mode that a user performed using the electronic percussion instrument. 3 is an overhead view of a position detection unit 11. FIG. It is a side view of the position detection part 11. 3 is a flowchart showing an operation example of the electronic percussion instrument 1. FIG. 3 is an example of a table stored in a storage unit 13. 3 is a sequence diagram illustrating an operation example of the electronic percussion instrument 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electronic percussion instrument, 10 ... Control part, 11 ... Position detection part, 12 ... Impact detection part, 13 ... Sound generation part, 14 ... Memory | storage part, 15 ... Communication part , 16 ... timer, 17 ... bus, 18 ... stick, 20 ... magnet, 21 ... magnetic sensor, 22 ... striking surface.

Claims (8)

An electronic musical instrument having an impact detection unit that detects contact with an operator operated by a user,
Detecting means for detecting a motion state of the operation element before the operation element reaches the hit detection unit;
Predicting means for predicting the motion state of the manipulator when reaching the hit detection unit based on the motion state detected by the detection means;
An electronic musical instrument comprising: generating means for generating performance information in accordance with the motion state predicted by the prediction means. An electronic musical instrument having an impact detection unit that detects contact with an operator operated by a user,
Detecting means for detecting the position and speed of the operating element at a certain time before the operating element reaches the hit detection unit;
Prediction means for predicting the time when the operation element reaches the hit detection unit and the speed at the time of arrival based on the position and speed detected by the detection means;
An electronic musical instrument comprising: generation means for generating performance information according to the time and speed predicted by the prediction means. An electronic musical instrument having an impact detection unit that detects contact with an operator operated by a user,
Detecting means for detecting the position of the manipulator;
Calculation means for calculating the speed of the operating element based on a plurality of positions detected by the detection means and detection times of the positions;
Determining means for determining whether or not the operating element has entered a predetermined region based on the position of the operating element detected by the detecting means;
Only when it is determined by the determination means that the operation element has entered the predetermined area, the time at which the operation element reaches the hit detection unit is predicted based on the speed calculated by the calculation means. Prediction means,
An electronic musical instrument comprising: generating means for generating performance information by determining sound generation timing and velocity from the time predicted by the predicting means and the speed calculated by the calculating means, respectively. Means for obtaining a delay amount of the communication network;
Determining means for determining the transmission timing of the performance information generated by the generating means based on the delay amount;
The electronic musical instrument according to any one of claims 1 to 3, further comprising: transmission means for transmitting the performance information via the communication network according to the transmission timing determined by the determination means. The detection unit includes a sensor provided in the hit detection unit, and the sensor detects a position of the operation element by sensing a detected member included in the operation element. The electronic musical instrument in any one of thru | or 3. The said operation element is a drumstick with which the said to-be-detected member was embedded in the front-end | tip part, and the said hit | damage detection part contains the striking surface for a user to strike the said drumstick. Electronic musical instrument. The electronic musical instrument according to claim 6, wherein the sensor includes at least two magnetic sensors provided in the hit detection unit, and the non-detection member is a magnet. A method for generating performance information in an electronic musical instrument having an impact detection unit that detects contact with an operator operated by a user,
A motion state detection step of detecting a motion state of the manipulator before the manipulator reaches the hit detection unit;
Based on the motion state detected in the transport state detection step, a motion state prediction step for predicting the motion state of the manipulator when reaching the hit detection unit;
A performance information generation method comprising: a generation step of generating performance information according to the motion state predicted in the motion state prediction step.

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