JP3149736B2 - Performance dynamics control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a performance dynamics control device capable of controlling the dynamics of a musical performance of an electronic musical instrument or the like in accordance with the gesture of a player.

[0002]

2. Description of the Related Art Conventionally, an automatic performance device stores performance information (note data) relating to each note of a melody performance and an accompaniment performance in a memory or the like, and automatically reads out the stored performance information at a predetermined tempo. A melody sound and an accompaniment sound are generated according to the read performance information. In this case, the performance tempo is determined by the frequency of the tempo clock output from a timer or the like. The frequency of the tempo clock can be freely changed by operating a tempo setting switch or the like. However, when the performance tempo during performance is changed by operating a tempo setting switch or the like, the manner of the change depends on the operation state (operation amount, operation speed, etc.) of the switch. It was very difficult to give a subtle tempo change corresponding to a hand gesture such as a hand gesture.

Therefore, recently, an accelerometer is built in an operator's baton or the like to detect the maximum value of the output of the accelerometer according to the hand movement, and to control the tempo of the automatic performance at the detection timing. The thing which was made appears. This device can control the tempo of the performance arbitrarily by sounding when the maximum output value of the acceleration sensor is detected, or by advancing the sequence data, and can also perform the performance in accordance with the output value of the acceleration sensor. Can be controlled arbitrarily also (to give the whole performance a sense of liveliness by adding strength to the sound during the performance). In other words, when the hand movement of the operator is large, the output of the acceleration sensor is increased, the performance dynamics are correspondingly increased, the rate of change of the sound is also increased, and the performance is enhanced as a whole. vice versa,
When the hand movement of the operator is small, the output of the acceleration sensor is reduced, the performance dynamics are correspondingly reduced, the rate of change of the sound is reduced, and the performance is weakened as a whole.

[0004]

In the performance by the actual conducting method, depending on various factors such as a conductor's hitting operation, acceleration / deceleration operation, clicking operation, and the shape of a line drawn by the tip of a conductor bar connecting the hitting points. The performance dynamics are controlled. However, conventionally, since the performance dynamics is controlled in accordance with the hand movement of the operator, that is, the output of the acceleration sensor, how much the operator is familiar with the commanding method, the mood of the operator at that time, and the contents of the music (music Genre), the strength and speed of hand movements vary, and these variations appear as variations in the output value of the acceleration sensor, making it very difficult to perform with the dynamics intended by the operator. There was a problem that is. For example, in a two-beat or four-beat hand up-and-down motion and a three-beat triangular hand motion,
In particular, if the operator shakes his hand without being aware, the operator intends to shake at the same strength and at the same speed. The swinging motion is stronger and faster than the horizontal swinging motion of the second beat of the triple time. Therefore, even if the operator himself intends to shake at the same strength and speed, the output value of the acceleration sensor also changes according to the difference in the swing operation, and the output of the acceleration sensor by the swing-down operation (downbeat) is changed. Is naturally larger, and as a result, the performance dynamics during the swing-down motion (downbeat) are larger than those of the other swing motions, and the performance dynamics seems to depend on the habit of the operator's hand motion Changes.

[0005] The present invention has been made in view of the above points, and eliminates variations in performance dynamics due to a habit of an operator's gesturing operation and the like, and provides performance dynamics control capable of providing the performance dynamics intended by the operator. It is intended to provide a device.

[0006]

A performance dynamics control device according to the present invention comprises: motion detection means for detecting a motion type and a motion amount based on a gesture motion of an operator; The correction means corrects the movement amount according to the type of movement, and the control means controls the dynamics of the performance based on the movement amount corrected by the correction means.

[0007]

The motion detecting means detects the type and amount of motion based on the gesture motion of the operator, that is, the hand motion or swing motion of the conductor. For example, when an operation detecting means including two orthogonal angular velocity sensors is provided in a baton,
When the operator moves the baton vertically or triangularly, the motion detecting means detects the direction in which the baton was swung as the type of motion based on the two sensor outputs, and the maximum value of the sensor output at this time is detected. Is detected as an operation amount. The correction means does not correct when the direction of the baton is swinging down (downbeat), but increases the sensor output in swinging up (upbeat) or triangular hand swinging. Is corrected. As a result, the variation in the amount of motion due to the habit of the gesture motion of the operator is made uniform. The control means controls the dynamics of the performance based on the motion amount corrected by the correction means, so that the performance is performed according to the dynamics intended by the operator without variation due to the habit of the gesture motion of the operator. Will be able to do it. The control means may control the tempo of the performance based on the motion type and the motion amount detected by the motion detection means in addition to the performance dynamics control.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a detailed configuration of an electronic musical instrument 1H including a keyboard, a tone generator circuit and an automatic performance device, and a baton 20 for outputting a tempo control signal corresponding to a hand gesture of an operator to the electronic musical instrument 1H, and a connection between the two. FIG. 4 is a hardware block diagram illustrating a relationship. First, the configuration of the electronic musical instrument 1H will be described. Microprocessor unit (CPU) 11
Controls the overall operation of the electronic musical instrument 1H.
The CPU 11 is connected to the ROM 1 via the bus 1G.
2, RAM 13, key press detection circuit 14, switch detection circuit 15, display circuit 16, sound source circuit 17, effect imparting circuit 1
8, timer 19, floppy disk drive (FD
D) 1A and MIDI interface (I / F) 1B
Are connected respectively.

In this embodiment, an electronic musical instrument in which the CPU 11 performs key press detection processing, tempo control data transmission / reception processing, and tone generation processing will be described.
It is needless to say that the present invention can be similarly applied to a configuration in which the module comprising the sound source circuit 17 and the module comprising the sound source circuit 17 are separately formed, and data is exchanged between the modules by the MIDI interface.
The ROM 12 stores various programs and various data of the CPU 11, and has a read-only memory (RO).
M). RAM 13 stores performance information and CPU
Numeral 11 temporarily stores various data generated when the program is executed, and a predetermined address area of a random access memory (RAM) is allocated to each of them and used as a register or a flag.

The keyboard 1C has a plurality of keys for selecting the pitch of a musical tone to be produced, has a key switch corresponding to each key, and, if necessary, a key pressing speed detecting device. And a touch detection unit such as a pressure detection device.
The keyboard 1C is a basic operation element for music performance, and it goes without saying that other operation elements, such as a drum pad, may be used. The key press detection circuit 14 includes a circuit composed of a plurality of key switches provided for each key of the keyboard 1C for designating the pitch of a musical tone to be generated, and when a new key is pressed. Key-on event information is output when the key is released, and key-off event information is output when the key is newly released. Further, a key pressing operation speed or a pressing force at the time of key depression is determined to perform processing for generating touch data, and the generated touch data is output as velocity data. As described above, the key-on / key-off event information and the velocity information are expressed in the MIDI standard, and also include a key code and data indicating an assigned channel.

The panel switch 1D is used to start automatic performance /
It includes a stop switch, a pause (pause) switch, and various switches for selecting, setting, and controlling a tone color, a volume, an effect, and the like. The panel switch 1D has various other switches, but details thereof are publicly known, and a description thereof will be omitted. The switch detection circuit 15 detects the operation state of each operator on the panel switch 1D, and outputs a switch event corresponding to the operation state to the CPU 11 via the bus 1G. The display circuit 16 displays various information such as the control state of the CPU 11 and the contents of the setting data on the display unit 1.
E is displayed. The display unit 1E is configured by a liquid crystal display panel (LCD) or the like, and its display operation is controlled by the display circuit 16.

The tone generator 17 is capable of simultaneously generating musical tone signals on a plurality of channels. The tone generator 17 receives performance information (data conforming to the MIDI standard) given via a bus 1G, and generates a tone signal based on the data. Occurs. The tone signal generating method in the tone generator circuit 17 may be of any type. For example, a memory reading method for sequentially reading out musical tone waveform sample value data stored in a waveform memory according to address data that changes in accordance with the pitch of a musical tone to be generated, or a method in which the address data is used as phase angle parameter data at a predetermined frequency A known method such as an FM method for performing a modulation operation to obtain musical tone waveform sample value data, or an AM method for performing a predetermined amplitude modulation operation using the above address data as phase angle parameter data to obtain musical sound waveform sample value data. You may employ suitably.

The effect imparting circuit 18 imparts various effects to the tone signal from the tone generator circuit 17 and outputs the tone signal to which the effect has been imparted to the sound system 1F. Effect imparting circuit 1
The tone signal to which the effect is given by 8 is generated through a sound system 1F including an amplifier and a speaker (not shown). The timer 19 counts a time interval and generates a clock pulse for determining the tempo of the automatic performance. This clock pulse is given to the CPU 11 as an interrupt command.
1 executes various processes by an interrupt process. The floppy disk drive (FDD) 1A is an interface for taking in automatic performance data from an external storage medium, that is, a floppy disk, into the electronic musical instrument 1H, and writing automatic performance data processed in the electronic musical instrument 1H to a floppy disk.

MIDI interface (I / F) 1B
Connects between the bus 1G of the electronic musical instrument 1H and the MIDI interface (I / F) 27 of the baton 20,
The interface 27 is composed of the bus 2E and the MID
It is connected to the I interface 1B. Therefore, the bus 1G of the electronic musical instrument 1H and the bus 2E of the baton 20 are connected via the MIDI interfaces 1B and 27, so that data can be exchanged bidirectionally in accordance with the MIDI standard. It has become.

Next, the configuration of the baton 20 will be described. A microprocessor unit (CPU) 21 controls the operation of the baton 20. This CPU2
1 is connected to the ROM 22 and the RAM 2 via the bus 2E.
3, switch detection circuit 24, A / D converters 25 and 26,
A MIDI interface 27 and a timer 28 are connected to each other. The ROM 22 stores various programs and various data of the CPU 21, and is constituted by a read-only memory (ROM). The RAM 23 temporarily stores various data generated when the CPU 21 executes a program, and is assigned a predetermined address area of a random access memory (RAM) and used as a register or a flag. The switch group 29 includes an on / off switch of the baton 20, a delay time switch for adjusting the output timing of the tempo control signal, and the like. The switch detection circuit 24 detects the operation state of the switch group 29, and outputs data corresponding to the operation state to the CPU 21 via the bus 2E.

X direction piezoelectric vibration gyro sensor 2A and Y
The direction piezoelectric vibrating gyro sensor 2B is a two-axis orthogonal (X-axis) piezoelectric gyro sensor that generates a voltage proportional to the Coriolis force proportional to the angular velocity of rotation when the sensor rotates about one rotation axis. And Y axis). Therefore, the X-direction piezoelectric gyro sensor 2A
, The angular velocity ωX in the X-axis direction can be detected based on the voltage output from the controller, and the angular velocity ωY in the Y-axis direction can be detected based on the voltage output from the Y-direction piezoelectric gyro sensor 2B.

The noise removing circuits 2C and 2D remove noise components inside the sensors included in the sensor output signals from the X-direction piezoelectric vibrating gyro sensor 2A and the Y-direction piezoelectric gyro sensor 2B. It is composed of a low-pass filter that removes components. A /
The D converters 25 and 26 convert the sensor output signals from which high frequency components have been removed by the noise removing circuits 2C and 2D into digital signals. This A / D converter 25
And 26 are read by the CPU 21 in a predetermined cycle, and are used in the operation determination processing of the entire baton 20 by predetermined data processing.

The timer 28 generates an operating clock of the baton 20. This operating clock is given as an interrupt command to the CPU 21. The CPU 21 detects the operating state of the baton 20 by an interrupt process, and Is output to the electronic musical instrument 1H via the MIDI interfaces 27 and 1B.

Next, an example of processing executed by the microcomputer (CPU 21) in the baton 20 is shown in FIG.
Will be described based on the flowchart of FIG. FIG.
Is the microcomputer (CPU 21) in the conductor 20
FIG. 6 is a diagram illustrating an example of a sensor output process performed by the device. This sensor output process is a timer interrupt process that is executed in synchronization with the operation clock (period of about 10 ms) from the timer 28. This sensor output process is a series of processes according to a control program stored in the program ROM 22, and is executed in order in the following steps.

Step 1: Outputs of the X-direction piezoelectric vibration gyro sensor 2A and the Y-direction piezoelectric vibration gyro sensor 2B,
That is, digital signals output from the A / D converters 25 and 26 are taken in via the bus 2E. Step 2: DC component is removed. That is, the conductor 2
When the operator who operates 0 performs a low-speed rotation operation such as a turning operation other than the hand movement, a DC component, that is, a drift component is generated in accordance with the rotation operation, so that the digital signal captured in step 1 has a low-frequency cutoff frequency. It is removed by passing it through a high-pass filter.

Step 3: An absolute angular velocity is calculated based on the outputs X and Y of the X-direction piezoelectric vibration gyro sensor 2A and the Y-direction piezoelectric vibration gyro sensor 2B from which the DC component has been removed, and is stored in the absolute angular velocity register A_SPEED. . The absolute angular velocity is calculated by taking the route of the sum of the squares of the arithmetic expressions and the outputs X and Y as shown in step 3 of FIG. Note that when the value of the absolute angular velocity calculated in this step is plotted with time as the horizontal axis, the result is as shown in FIG. Step 4: The average value of the absolute angular velocities calculated in step 3 at each timing from the time of the current timer interruption to the time of the timer interruption m times earlier is calculated and stored in the moving average register M_AVERAGE as a moving average value. For example, when m is “8”, a moving average value is obtained by dividing the sum of eight absolute angular velocities calculated at each timing by eight. Step 5: Calculate the average value of the moving average value calculated in Step 4 at each timing from the current timer interruption point to the nth timer interruption point and stored in the moving average register M_AVERAGE, and dynamically calculate the average value. Dynamic threshold register DY as threshold
Stored in NA_THRE.

Step 6: The value stored in the previous value register NOW is stored in the value register OLD two times before, the value stored in the current value register NEW is stored in the previous value register NOW, and the moving average value calculated this time (moving average register M_AVER) is stored.
AGE) is stored in the current value register NEW.
That is, the value register OLD and the previous value register N
The values stored in the OW and the present value register NEW are respectively shifted to new values. Step 7: A peak detection process is performed based on the stored values of the value register OLD, the previous value register NOW, and the current value register NEW. FIG. 3 is a diagram showing details of the peak detection processing. This peak detection processing is sequentially executed in the following steps.

Step 70: Whether or not the value stored in the previous value register NOW is equal to or greater than the value stored in the value register OLD before and the value stored in the current value register NEW, ie, the moving average detected at the time of the previous timer interrupt It is determined whether the value is a local maximum (peak). If YES, the process proceeds to the next step 71, and if NO, the process proceeds to step 8 in FIG. Step 71: Since it was determined in step 70 that the time of the previous timer interrupt was the maximum value (peak) of the moving average value, a predetermined time has elapsed since the current peak determination time is calculated from the previous peak determination time. It is determined whether or not the operation has been performed. If the predetermined time has elapsed (YES), the process proceeds to the next step 72, where the predetermined time has not elapsed (NO).
In this case, the process immediately proceeds to step 8 in FIG. That is, the peak determined as YES again in step 70 at a point in time when the predetermined time has not elapsed since the previous peak determination point means that it is a pseudo peak value caused by disturbance of the hand movement of the operator. is there.

Step 72: It is determined whether or not the value stored in the previous value register NOW is larger than a certain threshold value. If the value is larger (YES), the process proceeds to the next step 73; Proceed to step 8. That is, the fact that the value stored in the previous value register NOW is smaller than the certain threshold value means that the values of Step 70 and Step 71
This is because the peak determined as YES in the above means that it is a pseudo peak value caused by the disturbance of the hand movement of the operator. Step 73: The value stored in the previous value register NOW is calculated in step 5 of FIG.
It is determined whether or not it is larger than the dynamic threshold value stored in YNA_THRE. If it is larger (YES), the process proceeds to the next step 74, and if smaller (NO), the process immediately proceeds to step 8 in FIG. That is, the peak value is always larger than the dynamic threshold value.

Step 74: It is determined whether or not the value stored in the previous value register NOW is larger than the value obtained by multiplying the value stored in the previous peak value register LAST_PEAK by a predetermined coefficient A of 1 or less. If the value is smaller, the process immediately proceeds to step 8 in FIG. That is, the peak value is considered to be a value approximately similar to the previous peak value. Step 75: It is determined whether the valley detected by the peak detection processing or the valley detection processing before the time of the current timer interrupt is a valley, and the valley detected last time is (YES).
In the case of, the peak detected this time is considered to be correct, so the process proceeds to the next step 76. If the peak detected last time is a peak (NO), the peak cannot be continuous. Is considered to be an error, and the process immediately proceeds to step 8 in FIG.

Step 76: Previous peak value register LA
The value stored in the previous value register NOW is stored in ST_PEAK. Step 77: A peak type determination process is performed to determine what kind of operation the peak detected this time is. That is, this is a process of determining in which direction of the baton 20 the peak determined by the processes of steps 70 to 75 is caused by swinging.

FIG. 4 is a diagram showing details of the peak type determination processing. This peak type determination processing is sequentially executed in the following steps. Step 770: Calculate the angle based on the output X of the X-direction piezoelectric vibration gyro sensor 2A and the output Y of the Y-direction piezoelectric vibration gyro sensor 2B from which the DC component has been removed, and store it in the angle register θ. The angle is determined by step 77 in FIG.
It is calculated by an arithmetic expression shown in 0, that is, an arc tangent of a value obtained by dividing the output Y by the output X.

Step 771: It is determined whether or not the value stored in the angle register θ is greater than 180 ° and equal to or less than 300 °. If YES, the flow advances to the next Step 772; if NO, the flow advances to Step 773. Step 772: Since the current peak is caused by the hand motion of the motion type “1”, the current peak is set as the peak of the motion “1”. Step 773: Determine whether the stored value of the angle register θ is equal to or less than 60 ° and greater than 300 °,
In the case of YES, the process proceeds to the next step 774, and in the case of NO, the process proceeds to step 775. Step 774: Since the current peak is caused by the hand motion of the motion type “2”, the current peak is set as the peak of the motion “2”. Step 775: The determination of NO in steps 771 and 773 means that the stored value of the angle register θ is equal to or less than 180 ° and greater than 60 °, that is, the current peak is the operation type “3”. Here, it is assumed that the peak is caused by the hand gesture, so that the peak of this time is the peak of the operation “3”.

FIG. 11 is a diagram showing the relationship between the angle θ obtained by the operation formula in step 770 and the operation types “1”, “2” and “3”. That is, the angle θ is greater than 180 ° and equal to or less than 300 ° (step 7).
71) is determined to be in the direction of the operation “1” as shown in FIG.
The determination that the angle θ is larger than 00 ° (YES in step 773) means that the angle θ is 180 ° or less and larger than 60 ° in the direction of the operation “2” as illustrated (NO in step 773). ) Means that
This means that the baton 20 has been swung in the direction of the operation “3” as shown. The method of determining the type of peak is not limited to the method described above, and for example, the type of the previous peak, the angle difference from the previous peak, and the like may be considered.

Step 78: One of the dynamics calculation processes 1 to 5 is executed based on the peak value detected this time to calculate the dynamics, and the process goes to Step 8 in FIG.
Proceed to. Details of the dynamics calculation processes 1 to 5 will be described later. Step 8: A valley detection process is performed based on the stored values of the value register OLD, the previous value register NOW, and the current value register NEW. FIG. 5 is a diagram showing details of the valley detection processing. This valley detection processing is sequentially executed in the following steps.

Step 80: The value stored in the previous value register NOW is equal to or less than the value stored in the value register OLD before last time,
In addition, it is determined whether or not the value is equal to or less than the value stored in the current value register NEW, that is, whether or not the moving average value detected at the time of the previous timer interrupt is a minimum value (valley).
In the case of S, the process proceeds to the next step 81, and in the case of NO, the process returns and waits for the next timer interrupt timing. Step 81: If the last time of the timer interrupt is the time when the moving average value becomes the minimum value (valley), the step 8 is performed.
Since it was determined to be 0, it is determined here whether or not a predetermined time has elapsed since the current valley determination time from the previous valley determination time. If the predetermined time has elapsed (YES), the next step 82, and the predetermined time has not elapsed (N
In the case of O), since the present valley determination is considered to be erroneous, the process returns and waits until the next timer interrupt timing.

Step 82: It is determined whether or not the value stored in the previous value register NOW is smaller than a certain threshold value. If smaller (YES), the process proceeds to the next step 83, and if larger (NO), the current valley determination is made. Is considered an error, the program returns and waits for the next timer interrupt timing. Step 83: It is determined whether or not the value stored in the previous value register NOW is smaller than the dynamic threshold value stored in the dynamic threshold value register DYNA_THRE. If the value is smaller (YES), the process proceeds to the next step 84, where it is larger ( In the case of NO), it is considered that the present valley determination is erroneous, so the routine returns and waits until the next timer interrupt timing.

Step 84: It is determined whether or not the peak detected by the peak detection processing or the valley detection processing is a peak before the time of the current timer interrupt. If the previous detection is a peak (YES), the current detection is performed. Since the detected valley is considered to be correct, the process proceeds to the next step 85. If the valley detected last time is (NO), the valley detected this time is considered to be erroneous. Wait until. Step 85: It is determined that the minimum value detected this time is a formal valley. As described above, when a valley is detected, a peak is detected by the peak detection processing of FIG. That is, the peak detection and the valley detection are performed reliably by alternately performing the peak detection processing of FIG. 3 and the valley detection processing of FIG.

Next, details of the dynamics calculation processing 1 to 5 in step 78 of FIG. 3 will be described. 6 to 10 are diagrams showing details of the dynamics calculation processes 1 to 5, respectively. In the dynamics calculation processing 1 of FIG. 6, different tables are referred to for each of the types of the peaks (ie, the operation types) “1”, “2”, and “3” determined by the peak type determination processing of FIG. Outputs the value obtained by converting the value to a table as dynamics.

In the dynamics calculation processing 2 shown in FIG.
The dynamics are calculated by multiplying the peak value by a different coefficient for each of the peak types (ie, operation types) “1”, “2”, and “3” determined by the peak type determination process. The dynamics calculation processing 2 is sequentially executed in the following steps. Step 780: It is determined whether or not the type of the peak, that is, the operation type is “1”.
If so, the process proceeds to step 781. Step 781: It is determined whether the type of peak, that is, the operation type is “2”. If “2” (YES), the process proceeds to step 784; if “3” (NO), the process proceeds to step 786.

Step 782: Since it is determined in step 780 that the peak is of the operation type "1" (YES), the peak value is used as the dynamics here. That is, the peak value stored in the previous value register NOW is stored as dynamics in the dynamics register DYNAMICS. In this step, the coefficient is 1.0. Step 783: Key code “C” corresponding to operation “1”
3) and outputs the dynamics obtained in step 782. Step 784: Operation type "2" in step 781
(YES), the peak value is multiplied by a coefficient α, and the value is used as dynamics. That is, the peak value stored in the previous value register NOW is multiplied by the coefficient α, and the multiplication result (α × N
OW) as the dynamics, the dynamics register DY
Store it in NAMICS. Step 785: Key code “C” corresponding to operation “2”
The key-on of "# 3" and the dynamics obtained in step 784 are output. Step 786: Operation type "3" in step 781
Is determined to be the peak of (NO).
The peak value is multiplied by a coefficient β, and the value is used as dynamics. That is, the peak value stored in the previous value register NOW is multiplied by the coefficient β, and the multiplication result (β × NO
W) as the dynamics, the dynamics register DYN
Store in AMICS. Step 787: Key code “D” corresponding to operation “3”
3) and outputs the dynamics calculated in step 786.

In the dynamics calculation processing 3 shown in FIG.
Operation type “1”, as in the dynamics calculation process 2 of
A moving average is calculated for each of “2” and “3”, and the dynamics are calculated by multiplying the moving average by a different coefficient. In FIG. 8, the same steps as those in FIG. 7 are denoted by the same reference numerals, and a description thereof will be omitted.

Step 788: Since it is determined in step 780 that the operation type is the peak of the operation type "1" (YES),
Here, a moving average of the peak value of the operation type "1" is obtained, and the moving average is used as the dynamics. That is, the previous three-time value register LAST13, the previous two-time value register LAST12, and the last two-time value register LAST storing the peak value of the operation type "1" detected before the previous value register NOW.
T11 and the values stored in the previous value register NOW are added, and
The moving average obtained by dividing it by 4 ((NOW + LA
ST11 + LAST12 + LAST13) / 4) as the dynamics, the dynamics register DYNAMICS
To be stored. Step 789: Each of the registers LAST13 and LAST1 of the operation type "1" in preparation for the next dynamics calculation processing 3
2 and the value of LAST11 are updated respectively. That is, the value of the previous twice value register LAST12 is stored in the previous three times value register LAST13, and the previous two times value register LAST12 is stored.
12 stores the value of the value register LAST11 before last time, and stores the value of the previous value register NOW in the value register LAST11 before last time.

Step 78A: Since it is determined in step 781 that the operation type is the peak of the operation type "2" (YES), a moving average of the peak value of the operation type "2" is obtained, and the moving average value is calculated. Multiply by the coefficient α, and use it as dynamics. That is, the previous three-time value register LAST23 and the previous two-time value register LA storing the peak value of the operation type "2" detected before the previous value register NOW.
ST22, the respective stored values of the last-last value register LAST21 and the previous value register NOW are added, and a value obtained by dividing the divided value by 4 is multiplied by a coefficient α, and the multiplication result (α × (NOW + LAS)
T21 + LAST22 + LAST23) / 4) is stored as dynamics in the dynamics register DYNAMICS. Step 78B: In preparation for the next dynamics calculation processing 3, the values of the registers LAST23, LAST22, and LAST21 of the operation type “2” are updated as in step 789.

Step 78C: Since it is determined in step 781 that this is the peak of the operation type “3” (NO), a moving average of the peak value of the operation type “3” is obtained, and the moving average value is calculated. Multiply by the coefficient β and use it as dynamics. That is, the previous three-time value register LAST33 and the previous two-time value register LA storing the peak value of the operation type "3" detected before the previous value register NOW.
ST32, the stored values of the last-last value register LAST31 and the previous value register NOW are added, and a value (moving average value) obtained by dividing the value by 4 is multiplied by a coefficient β, and the multiplication result (β ×
(NOW + LAST31 + LAST32 + LAST3
3) / 4) is stored in the dynamics register DYNAMICS as dynamics. Step 78D: In preparation for the next dynamics calculation processing 3, the values of the registers LAST33, LAST32, and LAST31 of the operation type “3” are updated as in step 789.

In the dynamics calculation processing 4 shown in FIG.
Operation type “1”, as in the dynamics calculation process 2 of
For each of “2” and “3”, a different coefficient is multiplied by the peak value, and for the operation types “2” and “3”, an average is calculated between the multiplication result and the peak value of the operation type “1”. Thus, the dynamics are calculated. In FIG. 9, the same steps as those in FIG. 7 are denoted by the same reference numerals, and the description thereof will be omitted.

Step 78E: The operation type "1" is the same as the dynamics calculation process 2 in FIG. 7, but the operation types "2" and "3" are averaged with the peak value of the operation type "1". In this case, the peak value of the previous value register NOW, that is, the peak value of the operation type "1" is stored in the value register LAST two times before. Step 78F: Operation type “2” in step 781
(YES), the peak value of the operation type “2” is multiplied by a coefficient α, and the average of the multiplied value and the previous peak value of the operation type “1” is calculated. Let it be dynamics. That is, the peak value stored in the previous value register NOW is multiplied by the coefficient α,
The multiplied value is added to the value stored in the last-last value register LAST, and the result is divided by 2 to obtain an average value ((α × NOW + LAS
T) / 2) is stored in the dynamics register DYNAMICS as dynamics. Step 78G: Operation type “3” in step 781
Is determined to be the peak of (NO).
The peak value of the operation type “3” is multiplied by a coefficient β, and the average of the multiplied value and the previous peak value of the operation type “1” is taken as the dynamics. That is, the previous value register N
The peak value stored in OW is multiplied by a coefficient β, the multiplied value is added to the value stored in the last-last value register LAST, and the result is divided by 2 to obtain an average value ((β × NOW + LAST) /
2) with the dynamics as the dynamics register DYN
Store in AMICS.

In the dynamics calculation process 5 of FIG. 10, the operation type “1” and the dynamics calculation process 4 of FIG.
For each of “2” and “3”, a different coefficient is multiplied by the peak value, and for the operation types “2” and “3”, an average is calculated between the multiplication result and the peak value of the operation type “1”. Thereby calculating the dynamics. For the operation type “3”, the value of the coefficient is made different depending on whether the type of the previous peak (operation type) is “1” or “2”. That is, in the up-and-down hand movements in two or four time signatures, the peak of the operation “1” and the peak of the operation “2” appear alternately, and in the triangular hand movement in the triple time, the peak of the operation “1”, the peak of the operation “2”, The peak of the operation “3” appears in order. Therefore, the output value of the angular velocity sensor differs between the case where the operation “1” shifts to the operation “3” and the case where the operation “2” shifts to the operation “3”. Therefore, here, the coefficient value for the motion "3" is made different between the case of the vertical hand motion and the case of the triangle hand motion. In FIG. 10, FIG.
The same steps as those described above have the same reference characters allotted, and description thereof will not be repeated.

Step 78H: Since it has been determined in step 781 that the operation type is the peak of the operation type "3" (NO), it is determined here whether or not the previous operation type is "1". If (YES), step 78J
, And in the case of “2”, the flow proceeds to step 78G. Step 78J: Since the previous operation type was determined to be “1” in step 78H, the peak value of the operation type “3” is multiplied by a coefficient γ, and the multiplied value is compared with the previous value of the operation type “1”. Take the average with the peak value of and take it as the dynamics. That is, the peak value stored in the previous value register NOW is multiplied by the coefficient γ, the multiplied value is added to the value stored in the last-last value register LAST, and the result is divided by 2 to obtain an average value ((γ × NOW + LAST) / 2). ) As the dynamics, the dynamics register DYNAMICS
To be stored.

For example, since the peak value at the time of the swing-down operation is the largest and the peak value at the time of the swing-up operation is the smallest, the coefficient α in the case of the swing-up operation of the operation type “3” in the triangular hand swinging motion is set to 1.75. By setting the coefficient β in the case of the horizontal swing motion of the motion type “2” to 1.5 and the coefficient γ in the case of the swing motion of the motion type “3” in the vertical hand vibration to 1.875, the overall dynamics Can be made uniform. Note that these coefficient values are merely examples, and it goes without saying that each operator may arbitrarily set a desired value.

Next, an example of how the sensor 20 performs the sensor output process by moving the baton 20 in response to the gesture of the operator will be described with reference to FIG. FIG. 12 is a schematic diagram showing the concept of a sensor output process in a triangular hand movement in accordance with a three-beat gesture in such a manner that the baton 20 draws a triangular trajectory. FIG.
FIG. 12A is a diagram showing an output waveform of an absolute angular velocity in the case where the baton 20 is moved by a triangular hand movement of three beats, and FIG. 12B shows a peak detection point of the absolute angular velocity in the triangle hand movement. FIG.

When the baton 20 is moved by a triangular hand movement as shown in FIG. 12B, the value of the absolute angular velocity calculated in step 3 has a shape as shown in FIG. Peaks and valleys appear alternately in the order of first peak, valley, second peak, valley, third peak, and valley. First, when the baton 20 is swung in the direction of 240 ° (diagonally downward left) in FIG. 11, the first peak is detected by the processing of steps 70 to 75. Then, the value stored in the previous value register NOW is stored in the previous peak value register LAST_PEAK. By the processing of step 771 in FIG.
The peak is determined to be the peak of operation “1”. FIG.
In (B), the detection point of the first peak is indicated by a circle.
Then, the dynamics corresponding to the peak value of the first peak is calculated by one of the dynamics calculation processes 1 to 5 in step 78, and is output together with the key-on of the key code "C3" corresponding to the operation type "1". Become.

Thereafter, the conductor rod 20 is moved to 24 in FIG.
When the hand is swung from the direction of 0 ° (the diagonally downward left direction) to the direction of 0 ° (horizontal right direction), a valley is detected this time by the processing of steps 80 to 85 in FIG. . And the conductor rod 20 is 0 ° in FIG.
(The right horizontal direction), the second peak is accordingly detected as the peak of the operation “2”,
The dynamics corresponding to the peak value of the second peak is calculated, and is output together with the tempo key-on signal of the key code “C $ 3”.

In FIG. 11, the direction of the conducting rod 20 is from 0 ° (horizontal right direction) to 120 ° (diagonally upper left direction).
, A valley is detected at the change point of the hand gesture. Thereafter, this time, the third peak is detected as the peak of the operation “3”. The dynamics corresponding to the peak value of the third peak is calculated and output together with the tempo key-on signal of the key code "D3". Then, when the baton 20 is shaken again in the direction of 240 ° (diagonally left upper direction) from the direction of 120 ° (diagonally upper left direction) in FIG. 11, a valley is detected at the change point of the hand gesture, and the aforementioned valley is detected. The process is repeatedly executed.

The conductor rod 2 is shown on the right side of FIG.
0 indicates the peak detection time point when the hand is shaken (or rocked) in two or four beats in the vertical direction. In this case, when the command bar 20 is swung in the direction of 270 ° (downward) in FIG. 11, the first peak is detected as the peak of the operation “1”, and the dynamics corresponding to the peak value of the first peak is calculated. Then, it is output together with the tempo key-on signal of the key code "C3". Then, conductor 2
0 is 90 from the 270 ° direction (downward) in FIG.
When swung in the direction of (°), a valley is detected at the change point of the hand gesture, and the second peak is detected as the peak of the motion “3” this time, which corresponds to the peak value of the second peak. The dynamics are calculated and output together with the tempo key-on signal of the key code “D3”. Then, when the baton 20 is swung again in the direction of 270 ° (downward) from the direction of 90 ° (upward) in FIG. 11, a valley is detected at a change point of the hand movement, and the above-described processing is repeatedly executed. Is done.

As described above, when the operator moves the baton 20, the baton 20 outputs a tempo key-on signal and an intended dynamic at an interval intended by the operator in accordance with the hand gesture of the operator. Since the electronic musical instrument 1H reproduces the sequence data in accordance with the tempo key-on signal and the dynamics, the tempo and the performance dynamics can be arbitrarily controlled. As described later, the tempo of the automatic performance is controlled in the electronic musical instrument 1H so that the output timing of the tempo key-on signal substantially coincides with the beat timing of the automatic performance. The timing will coincide with the beat timing of the automatic performance.

Next, an example of how the microcomputer (CPU 11) in the electronic musical instrument 1H performs the tone reproduction process by inputting the tempo key-on signal will be described with reference to the flowcharts of FIGS. Will be explained. FIG. 13 is a diagram showing an example of a tone reproduction process performed by the microcomputer (CPU 11) in the electronic musical instrument 1H. This reproduction process is a timer interrupt process that is executed in synchronization with the operation clock (period approximately 1 ms) from the timer 19. This playback processing is performed by the program RO
This is a series of processes according to the control program stored in M12, and is sequentially executed in the following steps.

Step 40: It is determined whether or not the running state flag RUN is "1". If "1" (YES), it means that the reproduction process of the automatic performance data is performed. In the case of "0" (NO), it means that the reproduction process is not performed, so the routine immediately returns.
Wait until the next interrupt timing. Step 41: It is determined whether or not the pause flag PAUSE is “0”. If “0” (YES), the process is suspended and the process proceeds to the next step 42, and if “1” (NO), the process jumps to step 4B. I do. The suspension will be described later. Step 42: It is determined whether or not the timing counter TIME is "0". If "0" (YES), the process proceeds to the next step 43, and if it is a value other than "0" (NO), the process jumps to the next step 49. I do.

Step 43: Since it is determined in step 42 or 47 that the timing counter TIME is "0", the address of the RAM 12 is advanced, and the automatic performance data is read from the address position. Automatic performance data is event data (including channel number)
And delta time data. Step 44: It is determined whether or not the data read in step 43 is delta time data. If the data is delta time data (YES), the process proceeds to step 45; otherwise, the process proceeds to step 46.
Proceed to. Step 45: The delta time data read in step 43 is stored in the timing counter TIME.

Step 46: Processing corresponding to the event data read in step 43 (event handling processing)
Execute FIG. 14 is a diagram showing details of the event handling process. This event handling process is executed sequentially in the following steps. Step 460: In this embodiment, the automatic performance data is 1 to
Since data of 16 channels is included, of which the channel number CH1 is used as a tempo control channel and the key-on event is used as a tempo control mark, the event data read out in step 43 is the channel number. It is determined whether or not the event is a CH1 event. If YES, the process proceeds to step 461 and NO
In the case of, the event proceeds to step 465 because it is an event of another channel number. The channel number CH1
Is stored at the position of each beat timing, and the key code of each event is C3, C♯3, D3, C3, C♯3, D3... , 2, and 4 beats are arranged in the order of C3, D3, C3, D3.

Step 461: Since the event of the channel number CH1 is determined in the step 460,
Here, it is determined whether or not the key-on receive flag KON_RCV is “1”. If “1” (YES), the process proceeds to step 462, and if “0” (NO), the process proceeds to step 463. Step 462: If the key-on receive flag KON_RCV is “1” in step 461,
Before the event of the channel number CH1 is read, the MIDI interfaces 27 and 1B
Means that a tempo key-on signal has already been input via the key-on receive flag KO.
“0” is set to N_RCV, and the routine proceeds to step 47.

Step 463: The fact that the key-on receive flag KON_RCV is "0" in step 461 means that the tempo key-on signal corresponding to the event of the channel number CH1 read in step 43 has not been input yet. Here, the key code of the read event is stored in the key code register KEYCODE. Step 464: Since the tempo key-on signal has not been input yet, "1" is set to the pause flag PAUSE, and the routine proceeds to the next step 47. Pause flag PAUS
By setting E to "1", the determination in step 41 becomes NO thereafter, and steps 42 to 4A are not executed. Step 465: Since it is determined in step 460 that the event is other than the channel number CH1, the event is output to the tone generator 17 here. At this time, if the event is a note event, the velocity is corrected according to the dynamics calculated in step 78 of FIG. By correcting the velocity, the volume of the musical sound can be arbitrarily controlled in accordance with an operation such as the speed of swinging of the baton 20. Note that elements other than velocity, such as tone, pitch, and effect, may be arbitrarily controlled.

Step 47: Since the delta time data read in step 45 may be "0",
Here, it is determined again whether the timing counter TIME is "0", and if "0" (YES), the process proceeds to the next step 43, and if it is a value other than "0" (NO), the process jumps to the next step 49. I do. Delta time data is "0"
This means that a plurality of events exist at the same timing. Step 48: Multiply the value stored in the timing register TIME by the value stored in the tempo coefficient register T_COEF (tempo coefficient). Here, the tempo coefficient is a value based on “1”, and the tempo is controlled according to this value. For example,
When it is "0.5", the tempo is doubled and "2"
The tempo is halved.

Step 49: Timing register TIM
The value of E is decremented by "1". Step 4A: Delta accumulation register DELT
The value of A_ACM is incremented by “1”.
The delta accumulation register DELTA_ACM measures the time between events read from the channel number CH1. Step 4B: Interval Register INTERVAL
Is incremented by “1”. The interval register INTERVAL measures the time interval of the tempo key-on signal transmitted from the baton 20.

Step 4C: A tempo key-on reception process is performed. This tempo key-on reception process is a process performed each time a tempo key-on signal is received from the baton 20.
Therefore, when the tempo key-on signal is not received, no substantial processing is performed. FIG. 15 is a diagram showing details of the tempo key-on receiving process. This tempo key-on receiving process is executed in the following steps in order. Step 4C0: It is determined whether or not a tempo key-on signal has been received from the baton 20 via the MIDI interfaces 27 and 1B. If the signal has been received (YES), the process proceeds to step 4C1, and if not (NO), FIG. And waits until the next interrupt timing.

Step 4C1: Temporary stop flag PAUS
It is determined whether E is “1”. If “1” (YES), the process proceeds to step 4C2, and if “0” (NO), the process proceeds to step 4C9. Step 4C2: The fact that the pause flag PAUSE is determined to be “1” in step 4C1 means that
The event data of the channel number CH1 is read out before the reception of the tempo key-on signal, and the key code is already stored in the key code register KEYCO in step 463.
In this case, it is determined whether or not the key code of the received tempo key-on signal matches the key code stored in the key code register KEYCODE. Goes to step 4C3, and if they do not match (NO),
And waits until the next interrupt timing.

Step 4C3: Interval register I
NTERVAL value and delta accumulation register D
The ratio with the value of ELTA_ACM is set in the rate register RATE.
To be stored. That is, the ratio between the time interval of the tempo key-on signal transmitted from the baton 20 and the time interval at which the event of the channel number CH1 is actually read is stored in the rate register RATE. Step 4C4: Multiply the value of the rate register RATE by the tempo coefficient of the tempo coefficient register T_COEF. Step 4C5: As a result of the processing in step 4C4, limit processing is performed so that the value of the tempo coefficient register T_COEF does not become larger or smaller than a predetermined value. Step 4C6: Delta Accumulate Register DEL
"0" is set to TA_ACM. Step 4C7: Interval register INTERVA
Set “0” to L. Step 4C8: “0” is set to the temporary stop flag PUASE. Thus, the reproduction processing of FIG. 13 starts again.

Step 4C9: Since it is determined in step 4C1 that the pause flag PAUSE is "0", it means that the event data of the channel number CH1 has not been read yet. Is searched for and read out the event of the next channel number CH1 which first appears. Step 4CA: It is determined whether or not the key code of the received tempo key-on signal matches the key code of the searched channel number CH1. If they match (YES), the process proceeds to step 4CA; if they do not match (NO), FIG.
Then, the process returns to the reproduction process 3 and waits until the next interrupt timing.

Step 4CB: A value obtained by multiplying the accumulated value of the delta time data of each event read until the event of the channel number CH1 searched in step 4C8 is searched by the tempo coefficient of the tempo coefficient register T_COEF. , The value of the timing register TIME at that time and the delta accumulation register D
Add to ELTA_ACM. Step 4CC: Delta time and timing register TIM up to the event searched in step 4C8
Multiply the value of E by 1 / B. Here, B is a value of 1 or more. That is, the delta time of each event and the value of the timing register TIME are reduced in order to increase the reproduction speed after receiving the tempo key-on signal from the baton 20 and make the timing of receiving the tempo key-on signal closer to the beat timing. . Step 4CD: Key-on receive flag KON_RC
V is set to "1", and the routine proceeds to step 4CE. Steps 4CE to 4CJ are the same as those in step 4C3.
To 4C7, the description is omitted.

Next, how the microcomputer (CPU 11) in the electronic musical instrument 1H performs the reproduction process by inputting the tempo key-on signal will be described.
An example of the operation will be described with reference to FIG. FIG. 16 is a diagram showing the relationship between the input timing of the tempo key-on signal taken into the electronic musical instrument 1H from the baton 20 and the timing of reading out the automatic performance data. At timing t0, the event of the channel number CH3 is read out in step 43 through steps 40 to 42 in FIG. 13, and the event is output to the tone generator in step 465 in FIG. In the next step 43, the delta time D0 is read, and in a step 45, the timing register TIM is read.
The delta time D0 is written to E.

Thereafter, as the time corresponding to the delta time D0 elapses, the value of the timing register TIME also becomes 0. At the timing t1, the event of the channel number CH1 is read out at the step 43 through the steps 40 to 42 and the step 43. This timing t
Since the tempo key-on signal has not been received yet in step 1, the determination in step 461 of FIG. 14 is NO, the key code “C3” of the event is stored in the key code register KEYCODE in step 463, and “1” is set in the pause flag PAUSE. Is set. Next step 43
, The delta time D1 is read, and in step 45, the delta time D1 is written to the timing register TIME. At timing t2, which is slightly later than timing t1, a tempo key-on signal of key code "C3" and dynamics are received from the conductor 20 to the electronic musical instrument 1H. As a result, the processing of steps 4C3 to 4C8 is performed through steps 4C0 to 4C2 of the tempo key-on reception processing of FIG. 15, and the ratio between the value of the interval register INTERVAL and the value of the delta accumulation register DELTA_ACM is
For example, a value close to 1 is newly stored in the rate register RATE, the tempo coefficient register T_COEF stores almost the same tempo coefficient as the previous time, and the interval register INTERVAL, the delta accumulation rate register DELTA_ACM, and the pause flag PAUSE are set to “0”. Is set.

Thereafter, as the time corresponding to the delta time D1 elapses, the value of the timing register TIME also becomes 0, and the channel number C at the timing t3.
The event of H2 is read, and step 465 in FIG.
The event is output to the tone generator circuit. At this time, the velocity of the note event is modified according to the received dynamics. In the next step 43, the delta time D
2 is read, and the timing register T
The delta time D2 is written to the IME. Less than,
Similarly, at each timing t3 to t7, the event of the channel number CH3 to CH6 and the delta time D3 to D6
Are sequentially read, and each event is output to the tone generator circuit. Thereafter, at the timing t8 when the time corresponding to the delta time D6 is being counted (during the decrement processing of the timing register TIME), the command bar 20 sends the electronic musical instrument 1H a tempo key-on signal of the key code "C $ 3" and the dynamics. Is received. As a result, FIG.
Through steps 4C0 and 4C1 of the tempo key-on receiving process of No. 5, the processes of steps 4C9 to 4CJ are performed. In step 4C9, since the event of the key code "C $ 3" of the channel number CH1 is immediately searched, the process of step 4CB is performed via step 4CA. In step 4CB, the channel number CH
Since the delta time did not exist until the event 1 was searched, the accumulated value of the delta time is "0" and only the value of the timing register TIME is added to the delta accumulation register DELTA_ACM. You. Thereby, the value of the delta accumulation register DELTA_ACM and the value of the interval register IN
The relation to the value of TERVAL is: Delta accumulated D
ELTA_ACM is the interval register INTE
It is larger than RVAL.

In step 4CC, the delta time of each event and the value of the timing register TIME are multiplied by 1 / B in order to increase the reproduction speed after the timing t8 when the tempo key-on signal is received. In step 4CD, the key-on receive flag KON_RCV is set to "1". In steps 4CE to 4CJ, the ratio (a value smaller than 1) between the value of the interval register INTERVAL and the value of the delta accumulation register DELTA_ACM is newly stored in the rate register RATE. Stored
A tempo coefficient register T_COEF stores a smaller tempo coefficient than the previous time, and a delta accumulation register DELTA_ACM and an interval register INTE.
"0" is set to RVAL. afterwards,
When the value of the timing register TIME becomes 0 and the event of the channel number CH1 is read at the timing t9, “0” is set to the key-on receive flag KON_RCV in step 462 in FIG. Hereinafter, similarly, at each timing, the event of the channel number and the delta time are stored in the tempo coefficient register T_.
They are sequentially read out while being modified by a tempo coefficient smaller than 1 stored in the COEF, and each event is output to the tone generator circuit. That is, if the timing of receiving the tempo key-on signal from the baton 20 is earlier than the timing of reading out the automatic performance data, the tempo of the automatic performance data reproduction process increases, and if the reverse, the reproduction of the automatic performance data is performed. The processing tempo goes down.

In the above-described embodiment, the sensor for detecting the gesture motion is not limited to the piezoelectric gyro sensor, but may be an acceleration sensor or a sensor using magnetism or light. For example, a gesture may be taken by capturing a gesture and detecting the gesture by image processing. Further, a plurality of these sensors may be combined. Further, in the above-described embodiment, the case where the peak and the valley of the output from the piezoelectric gyro sensor are extracted as the feature point of the gesture motion has been described. However, the present invention is not limited to this. May be used to extract the feature points. Further, in the above-described embodiment, the control rod 20 and the electronic musical instrument 1 connected via the MIDI interface are used.
Although H has been described as an example, it goes without saying that both may be configured integrally. The tempo clock generated by the electronic musical instrument 1H may be supplied to an external device to control the performance tempo of the external device.

In the above-described embodiment, the case where the commanding bar 20 detects peaks and valleys, and further detects the type of action, has been described. However, the commanding bar 20 simply outputs a sensor value corresponding to a gesture motion, and It goes without saying that the musical instrument 1H may perform detection (peak and valley detection, motion type detection) processing and the like in accordance with the output. Further, in the above-described embodiment, the case where the gesture motion is detected using two piezoelectric gyro sensors has been described, but it goes without saying that three or more piezoelectric gyro sensors may be used. In this case, sensors provided at different positions for the triple time and the 2/4 time may be used, respectively, or the gesture operation may be detected by comprehensively judging the outputs of three or more sensors. Good.

Further, in the above-described embodiment, the case where the sensor is built in the conductor bar has been described. However, the sensor is mounted on the body (for example, a hand) of the operator, or a microphone or other device (for example, a remote control of a karaoke apparatus, etc.). ). In this case, the output of the sensor output may be performed in a wired or wireless manner. For example, when the microphone is built in, the tempo control may be enabled only in the intro part of karaoke, and the karaoke performance tempo may be determined according to the gesture of the microphone. In the embodiment, the case where the tempo is always controlled during the performance has been described. However, it may be used when the tempo is determined prior to the performance. In the embodiment, the case where the performance data is composed of the event and the delta time has been described, but it goes without saying that a storage method other than this may be used. For example, the performance data is composed of a set of an event and an absolute time. The unit of delta time is m
Even if a time unit such as s is used, the length of a note (for example, 4
1/24 of a minute note) may be used.

In the embodiment, the case where the tempo is controlled by multiplying the value of the delta time by the tempo coefficient and increasing / decreasing the value of the delta time has been described. However, by changing the processing cycle (interrupt timing). The tempo may be changed. In the embodiment, data for tempo control and data for automatic performance are mixed,
Although the case of distinguishing by channel number was explained,
Both may be separately provided in advance. For example, data storing a memory address corresponding to a note position for controlling a tempo may be used as tempo control data. When the tempo changes, the value of the tempo coefficient register T_COEF may be interpolated with the previous value so that the tempo changes smoothly. Similarly, the control of the dynamics may be smoothly changed.

In the embodiment, the case where the dynamics are calculated by multiplying the peak value by the predetermined value has been described. However, the dynamics may be calculated by adding the predetermined value. Further, the value to be multiplied or added may be changed based on the change in the magnitude of the peak, or the value may be selected from a plurality of predetermined values. As for the dynamics calculation processing 1 shown in FIG. 6 for obtaining dynamics by referring to a table, a plurality of tables may be provided, and one of the tables may be appropriately selected according to the size of the peak. In the above embodiment, the case where the velocity is changed according to the dynamics has been described. However, the timbre, the pitch, the effect, and the like may be changed according to the dynamics. The present invention is not limited to this, and the number of performance parts may be increased or decreased, or the dynamics of performance may be controlled by controlling at least one of them.

In the dynamics calculation process 3 in FIG. 8, a case has been described in which a moving average of the four peak values is taken and the resulting value is used as the dynamics. However, a moving average of the other number of peak values is taken and the resulting value is used as the dynamics. Needless to say, it is good. Further, in the dynamics calculation processing of FIGS. 9 and 10, an example was described in which the average with the previous peak value of the operation type “1” was taken and the average was used as the dynamics. However, steps 782, 784, and 786 of FIG. Each calculated operation type "1",
The dynamics of “2” and “3” may be averaged and output as the dynamics of the operation type.

[0075]

According to the dynamics control device of the present invention, it is possible to eliminate the fluctuation of the dynamics due to the habit of the hand movement of the operator and to provide the dynamics intended by the operator.

[Brief description of the drawings]

FIG. 1 is a hardware block diagram showing a detailed configuration of an electronic musical instrument, a baton that outputs a tempo control signal corresponding to a hand gesture of an operator to the electronic musical instrument, and a connection relationship between the two.

FIG. 2 is a diagram illustrating an example of a sensor output process performed by a microcomputer in the baton in FIG. 1;

FIG. 3 is a diagram illustrating details of a peak detection process in FIG. 2;

FIG. 4 is a diagram illustrating details of a peak type determination process in FIG. 3;

FIG. 5 is a diagram illustrating details of a valley detection process in FIG. 2;

FIG. 6 is a diagram illustrating details of a dynamics calculation process 1 which is an example of the dynamics calculation process of FIG. 3;

7 is a diagram showing details of a dynamics calculation process 2 which is an example of the dynamics calculation process of FIG.

FIG. 8 is a diagram illustrating details of a dynamics calculation process 3 which is an example of the dynamics calculation process of FIG. 3;

FIG. 9 is a diagram illustrating details of a dynamics calculation process 4 which is an example of the dynamics calculation process of FIG. 3;

FIG. 10 is a diagram showing details of a dynamics calculation process 5 which is an example of the dynamics calculation process of FIG. 3;

FIG. 11 is a diagram illustrating a relationship between an angle θ obtained by an arithmetic expression and an operation type.

[Fig. 12] 3
It is a schematic diagram which shows the concept of the sensor output process in case a hand-movement operation | movement is performed in a beat.

FIG. 13 is a diagram illustrating an example of a tone reproduction process performed by a microcomputer in the electronic musical instrument.

FIG. 14 is a diagram showing details of the event handling process of FIG. 13;

FIG. 15 is a diagram showing details of the tempo key-on reception processing of FIG. 13;

FIG. 16 is a diagram showing the relationship between the input timing of a tempo key-on signal taken into the electronic musical instrument from a baton and the timing of reading out automatic performance data.

[Explanation of symbols]

11, 21, CPU, 12, 22, ROM, 13, 23
... RAM, 14 ... Key press detection circuit, 15, 24 ... Switch detection circuit, 16 ... Display circuit, 17 ... Sound generator circuit, 18 ... Effect giving circuit, 19,28 ... Timer, 1A ... Floppy disk drive (FDD), 1B , 27 MIDI interface (I / F), 1C keyboard, 1D, 29 panel switch, 1E display unit, 1F sound system, 1G, 2E bus, 1H electronic musical instrument, 20 conductor rod, 25, 26 ... A / D, 2A ... X direction piezoelectric vibration gyro sensor, 2B ... Y direction piezoelectric vibration gyro sensor, 2
C, 2D: Noise removal circuit

──────────────────────────────────────────────────続 き Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G10H 1/053 G10H 1/00-1/00 102 G10H 1/46

Claims (2)

(57) [Claims] An operation detecting means for detecting an operation type and an operation amount based on a gesture operation of an operator, and a correction for correcting the operation amount according to the operation type detected by the operation detecting means. And a control means for controlling performance dynamics based on the movement amount corrected by the correction means. 2. The performance dynamics control device according to claim 1, wherein the control means controls a performance tempo based on the type and amount of motion detected by the motion detection means.