JPH1097248A - Sound source control system for electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce desired musical tones when a player makes a gesture. SOLUTION: Foot sensors among sensors 5 are provided with impact sensors at the tones and heels. A CPU 1 executes processing to produce tongs by having the musical tones corresponding to the toe sensors formed by a sound source circuit 10 when the outputs of the toe sensors exceed prescribed values. This CPU executes the processing to produce the musical tones corresponding to the toe sensors when the outputs do not exceed the prescribed values but are at the level larger than the heel sensor outputs. As a result, the production of the undesired musical tones is prevented even if the undesired sensor outputs are emitted from the heel sensors when the player makes the gesture to apply impact only to the tone sensors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound source control system for a Mibli type electronic musical instrument which has sensors at the tips and middle parts of hands and feet and generates a musical sound using the sensor output when gestured. It is about.

[0002]

2. Description of the Related Art An electronic musical instrument that has a sensor attached to a body and generates a musical tone according to the gesture of the body is conventionally known. In this type of electronic musical instrument, an electronic musical instrument having a foot sensor of a type laid in shoes has been filed by the present applicant (Japanese Patent Application No. Hei 7-245125). Since this foot sensor has an impact sensor attached to the toe and heel, unlike sensors using switches or pressure sensors that have mechanical contacts, it is used for light movements such as tap dance. Also, it is possible to reliably obtain a signal required for sound generation.

[0003]

When playing an electronic musical instrument using such a foot sensor, the desired performance is performed by laying the foot sensor in the shoe and gesturing as if pressing a tap. In this case, since one foot sensor is provided with two impact sensors, 2
Each sound is controlled based on the signal from two impact sensors. However, in order to sound only from the toe sensor, a signal is output not only from the toe sensor but also from the heel sensor when gestured, and a sound corresponding to the heel is sometimes performed. That is, there is a possibility that an erroneous sound may be generated in which the position of the undesired heel is generated.

Accordingly, an object of the present invention is to provide a sound source control method for an electronic musical instrument in which a desired musical tone is generated when a player gestures.

[0005]

In order to solve the above-mentioned object, a sound source control method for an electronic musical instrument according to the present invention is applied to an electronic musical instrument which is attached to a body such as a hand or a foot and generates a musical sound when gestured. When the same type of sensor is attached to the tip of the hand or foot and the middle part, and when you gesture,
If the output of one of the sensors to be prioritized exceeds a predetermined value, a tone corresponding to the sensor to be prioritized is generated, regardless of the output level of the other sensor, and the priority sound is generated. If the output of the sensor to be sounded does not exceed a predetermined value, a musical tone corresponding to the sensor to be sounded only is generated only when the output of the sensor to be sounded preferentially exceeds the output of another sensor. Processing means is provided.

Further, in the sound source control system of the electronic musical instrument, when the output of the sensor to be preferentially sounded exceeds a predetermined value, the sounding of a tone corresponding to another sensor is prohibited.

Another sound source control method for an electronic musical instrument according to the present invention is an electronic musical instrument which is attached to a body such as a hand or a foot and generates a musical sound by gesturing, and is provided between a tip end of a hand or a foot and an intermediate portion. The same type of sensor is attached to the part,
If the output of one of the sensors to be preferentially sounded exceeds a predetermined value when gestured, a tone corresponding to the sensor to be preferentially sounded is generated regardless of the output levels of the other sensors. The first sensor of the first sensor attached to the toe of the foot and the second sensor attached to the heel of the foot should be a sensor to be preferentially sounded. Is what it is.

According to the present invention, the sensor to be sounded with priority is defined and the musical tone is generated according to the output of the sensor to be sounded preferentially. You will be able to pronounce street music. Therefore, it is possible to improve the performance of the Mibli type electronic musical instrument.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a block diagram of an electronic musical instrument to which a sound source control method for an electronic musical instrument according to the present invention is applied. In this figure, reference numeral 1 denotes a CPU that receives a sensor output attached to a hand, an elbow, a shoulder, a foot, etc., detects a sensor that has been turned on, and performs various controls for generating a musical tone corresponding to the sensor. Reference numeral 2 denotes a read only memory (RO) storing an operation program of the CPU 1 and the like.
M), 3 is a random access memory (RAM) used as a work area, various registers and a buffer area of the CPU 1, 4 is a timer interrupt for activating a timer interrupt process which is one of the routines executed by the CPU 1. A timer for outputting an output, 5 is a sensor of the same kind which is attached to a hand, an elbow, a shoulder, a foot, etc. of a body and generates an output according to a gesture, 6 is a sensor interface for receiving a signal from the sensor 5, and 7 is A switch provided on a panel for setting various musical sounds such as timbres, a detection circuit 8 for detecting that the switch 7 has been operated, and a reference numeral 9 for displaying various information when the user performs various settings with the switch 7 , A display circuit for displaying the current state, and a voice parameter set at the time of a sounding instruction sent under the control of the CPU 1. Tone generator for generating a musical tone signal in accordance with, 11 is a sound system to sound a musical tone signal generated by the sound source circuit 10.

Next, the details of the foot sensor of the sensor 5 shown in FIG.
FIG. 2 shows a back view of the foot sensor 40, and FIG. 3 shows a side view when the foot sensor 40 is laid in shoes. However, in FIG. 3, the entire length of the foot sensor 40 is reduced by an adjustment unit main body 22 described later. FIG. 2 shows the foot sensor 40 for the right foot. The foot sensor for the left foot is similarly configured, and has an outer shape of an insole. The insole-shaped foot sensor 40 is divided into two parts, a front part 20 and a rear part 21, and the front part 20 and the rear part 21 are connected by an adjustment unit main body 22. The adjusting section main body 22 is fixed to the rear section 21,
The front portion 20 is slidably engaged with the long hole 24 formed in the adjustment portion main body 22, and the front portion 20 is made expandable and contractable with respect to the rear portion 21. Thus, the overall size of the foot sensor 40 can be adjusted.

A first attaching portion 26 is provided so as to cover a portion on the back surface of the front portion 20 where the toe is located, and the first sensor portion 27 is detachably attached to the first attaching portion 26.
Is fixed. The first attaching section 26 and the first sensor section 2
7 has a small protrusion on one surface and a small engagement portion that engages with the protrusion on one surface, so that the first sensor portion 27 is
It can be detachably fixed to an arbitrary position of. Further, a second surface is provided on almost the entire rear surface of the rear portion 21.
An attaching section 30 is provided, and a second sensor section 31 is detachably attached to the second attaching section 30. The second sticking part 30 and the second sensor part 31 are also provided with a small protrusion on one surface on one side, and a small engagement part engaging with the protrusion on one surface on the other side. The two sensor unit 31 can be detachably fixed to an arbitrary position of the second sticking unit 30. The engaging portion can be formed of, for example, an adhesive member made of a male and female member of Magic Tape (registered trademark).

When the player wears the shoe while laying the foot sensor 40 in the shoe while adjusting the overall size with the adjusting unit body 22 of the foot sensor 40 shown in FIG. Will be placed on the back of the foot. That is, the foot sensor 40 is sandwiched between the sole contact surface of the shoe and the back surface of the front part 20 or the rear part 21, and the foot sensor 40 is attached to the first sensor part 27 and the second sensor part 31 of the foot sensor 40. Can be applied by an operation such as hitting the floor on the floor. In this case, assuming that the first sensor unit 27 and the second sensor unit 31 are adhered to the positions shown in FIG. 2, the first sensor unit 27 can be operated with the toes, and the second sensor unit can be operated by the heel. The unit 31 can be operated.

Here, the first sensor unit 27 and the second sensor unit 31 are provided with an impact sensor using a piezoelectric element, and when receiving an impact, an electric signal corresponding to the impact force is generated from the impact sensor. Become so. This electric signal is supplied to the first sensor unit 27 and the second sensor unit 3
1 through the lead wires 28 and 32 respectively.
2 and one lead 33 in the adjustment unit main body 22.
Are output together. Thereby, when the foot is operated, such as when performing a tap dance, an electric signal corresponding to the operation can be output from the foot sensor 40,
A musical tone is generated according to the output.

Further, in a side view when the foot sensor 40 shown in FIG.
Is mounted so that the first sensor portion 27 and the second sensor portion 31 abut on the sole contact surface 50 of the shoe. Therefore,
Since the first sensor unit 27 is arranged near the lower part of the toe and the second sensor unit 31 is arranged near the lower part of the heel, more efficient operation can be performed with the foot. . Note that the first sensor unit 27 and the second
The fixing position of the sensor portion 31 can be adjusted and fixed to a desired position of the first attaching portion 26 or the second attaching portion 30 as described above. Also, a foot sensor 4 in the shoe
When the 0 is mounted, it is natural that the size of the foot sensor 40 is fitted to the size of the shoe by adjusting the distance between the front part 20 and the rear part 21 using the size adjustment part 41 composed of the adjustment part main body 22. That is.

By the way, the first sensor unit 27 and the second sensor unit 31, which are mounted on the foot sensor 40, are provided with an impact sensor. Need to generate the output. However, since the impact sensor of the present application has a cantilever support structure, the output becomes small when an impact is applied to the vicinity of the support portion.
In this case, if the sensitivity of the sensor is to be increased, the portion to be displaced must be thinned, so that the durability deteriorates. Therefore, the first sensor unit 2 of the present invention
7 and the second sensor section 31 solve the above-mentioned drawbacks as a central support structure as shown in FIG.

Referring to FIG. 4, the structure of the first sensor portion 27 and the second sensor portion 31 formed in a disk shape will be described. Since the two sensor portions have the same structure,
These will be described as sensor units. FIG. 4 (a)
FIG. 3 is an exploded perspective view of the sensor section, and FIG. 3B is a side view of the sensor section, and is also a partially enlarged view of FIG. A sensor panel 63 is fixed to the center of the disk-shaped metal plate 64, and a hard rubber cushion material 60 is adhered to the metal plate 64 around the sensor panel 63. The cushion member 60 is formed in a ring shape and functions as a protector for the sensor panel 63. Further, the cushion member 60 is formed with a cut portion 61 for leading out a lead wire 63-3 connected to the sensor panel 63.

The sensor panel 63 includes a disk-shaped metal plate 63-1.
And a sensing unit 63-2 made of a piezoelectric element fixed on the metal plate 63-1. The metal plate 63-1 and the sensing unit 63-2
An electric signal induced by the impact is taken out via a lead wire 63-3 connected to the power supply. This electric signal is of a type that generates an electromotive force only when a force is applied. In the case of continuous pressurization, an electromotive force is generated only during initial pressurization and pressure release. A screw hole 64-1 is formed in the center of the metal plate 64, and a fixing screw 67 is screwed into the screw hole 64-1. At this time, the fixing screw 67 is screwed into the screw hole 64-1 of the metal plate 64 via the through hole 66-1 formed substantially at the center of the disk-shaped support plate 66 and the spacer 65. Therefore, the sensor panel 63
The metal plate 64 and the support plate 66 are separated by a spacer 65 at a predetermined interval.

Note that this interval is set so as not to be plastically deformed even when the metal plate 64 is displaced. For example, the interval is about 0.8 mm. However, this interval differs depending on the material and diameter of the metal plate 64. Further, while holding the lead wire with the cut portion 61 of the cushion material 60,
Utilizing the gap fixed by the adhesive, the inside and outside air circulation holes at the time of pressing and releasing the sensor portion are formed.

In the sensor unit configured as described above, if a stepping operation is performed to give an impact to the sensor unit, the spacer 65 is disposed only between the central portion of the support plate 66 and the metal plate 64. Since the spacer 65 is not provided, the portion of the spacer 65 serves as a hinge, and the peripheral edge of the metal plate 64 is displaced with respect to the support plate 66. That is, the gap between the support plate 66 and the metal plate 64 at the periphery is reduced.
As a result, the sensing unit 63-fixed to the metal plate 64
2 is distorted, and the piezoelectric effect is induced and the induced piezo-electricity is output via the lead wire 63-3. Therefore, when a shock is applied to the sensor unit by the foot, an electric signal is output from the sensor unit, and a tone can be generated based on the electric signal.

The foot sensor 40 shown in FIGS.
FIG. 5 shows an example of a signal waveform output from the first sensor unit 27 or the second sensor unit 31 when an impact is given to the first sensor unit 27. As shown in FIG.
In general, the signal waveform output from the device rises sharply due to the impact, and has a plurality of peaks at the rising portion. Then, the waveform gradually falls. The CPU 1 shown in FIG. 1 receives such a signal waveform via the sensor interface 6, detects its peak level, and determines whether or not the signal waveform corresponds to an ON event. The details of this processing will be described later, but will be briefly described below.

First, in FIG. 5, FOT_TRG_LVL is a first reference level for determining the output of the sensor unit without being affected by noise.
Peak detection processing is started at time t0 when it is detected that G_LVL has been exceeded. The first reference level FOT_TRG_LVL is
For example, it is set to 40 mV. In this peak detection processing, for example, when a peak is detected at time t1 as shown in the figure, a predetermined timer time FOT_PEK_TIM is set in the timer fot_pek_tim. This timer fot_pek_ti
If a new peak value that exceeds the peak value of the detected peak is detected before m expires, the peak value is replaced with the new peak value, and the timer fot_
The predetermined timer time FOT_PEK_TIM is set again in pek_tim, and the process of detecting the next peak is continued. The timer time FOT_PEK_TIM is set to, for example, 10 ms.

If no peak value exceeding the already detected peak value is detected within the timer time FOT_PEK_TIM, the peak detection processing ends. A status flag indicating that the peak detection process is being performed is indicated by FOT_PEK_WCH. The flag FOT_PEK_WCH is set to “1” at time t0 when the output of the sensor unit matches the first reference level FOT_TRG_LVL, and is cleared to “0” at time t2 when the timer fot_pek_tim times out. At time t2, a flag FOT_ON_EVT indicating that an ON event has occurred
Is set to “1”. Note that FOT_ON_LVL_T is the second reference level, and the second reference level FOT_ON_LVL_T is
When the output of the sensor unit is set to about 4V at the maximum, for example, it is set to 3.13V.

When it is detected that the flag FOT_ON_EVT has been set to "1", the sound generation process is started and the flag FO_ON_EVT is activated.
A tone corresponding to the sensor unit for which T_ON_EVT is set to “1” is generated in the sound source circuit 10 (see FIG. 1) and emitted from the sound system 11. By the way, since the foot sensor 40 is provided with the first sensor portion 27 and the second sensor portion 31, when an attempt is made to give an impact only to the first sensor portion 27 provided on the toe, only the toe It may be difficult to perform an operation of giving an impact to the second sensor unit 31 provided on the heel. Then, a musical tone corresponding to the second sensor unit 31 that is not desired by the player is also generated. Therefore, in the present invention,
Since it is difficult to apply an impact to only the toes, the tone corresponding to the first sensor unit 27 provided on the toes is preferentially sounded.

The details of the processing for this will be described later, but when briefly described, the output level output from the first sensor section 27 provided on the toe is the second reference level FOT_ON_L.
When VL_T or more, a tone corresponding to the first sensor unit 27 provided on the toe is generated regardless of the output level of the second sensor unit 31. The output level output from the first sensor unit 27 is the second reference level FOT_ON_LVL.
If it does not reach _T, the output level of the first sensor unit 27 provided on the toe is compared with the output level of the second sensor unit 31 provided on the heel, and the output level of the first sensor unit 27 is compared. When is larger, a tone corresponding to the first sensor unit 27 provided on the toe is generated. Thus, when an impact is applied only to the first sensor unit 27 provided on the toe, even if an impact is applied to the second sensor unit 31 provided on the heel, the first sensor unit 27 Only the corresponding musical tone can be produced reliably.

Next, the processing for executing the above operation will be described in detail with reference to the flowcharts shown in FIGS. The flowcharts shown in FIGS. 7 to 9 are timer interrupt processing started by the interrupt output of the timer 4 shown in FIG. 1 and executed by the CPU 1.
0 represents a sound generation process that operates as one of the main routines. The main routine also has a process of changing and setting the type of the sound source controlled by various foot sensors, hands, and the like. However, since it is not so related to the present invention, it is not shown and will not be described. Note that the processing flow is such that the interrupt processing shown in FIGS. 7 to 9 is performed at the time of a timer interrupt while the main routine processing is being performed, and when the interrupt processing is completed, the process returns to the main routine to execute the main routine processing. You will be

Here, the timer interrupt output output from the timer 4 is output, for example, every 1 ms. When the timer interrupt process is started, it is determined that the parameter i changes from "0" to "3" in step S20. During step S2
The process proceeds to 1 and the process returns when the parameter i becomes "4". Therefore, in step S20, i = 0 when returning to the main routine, and FIG.
When the process shown in (1) is completed and the process returns to step S20, the process of counting up i is included. In addition, i is a parameter for identifying a total of four sensors of the toe and the heel provided in the foot sensors 40 of both feet. As shown in the lower part of FIG. 6, the relationship between the parameter i and the sensor is as follows: when the parameter i is “0”, the left foot toe sensor is shown; when the parameter i is “1”, the left foot toe sensor is shown. When the parameter i is "2", the right foot toe sensor is indicated, and when the parameter i is "3", the right foot heel sensor is indicated.

Here, when the foot sensor is in the off state, the flow shown in FIGS. 7, 8 and 10 will be followed. In the off state, the output of the foot sensor is almost 0 V, and therefore, FIG. 5 shows a state after t3 or before t0. First, immediately after the power is turned on, an initialization process is performed in a process (not shown), and the timer fot_pek_
Various registers such as tim [i] are set to the initial value “0”. Then, when the interrupt processing is activated for the first time, the process proceeds to step S21 via step S20, where a timer fot_pek_tim [i] indicating a peak detection period, a timer fot_wat_tim [i] indicating a period during which ON event detection is unique, and When a time value is set in a timer fot_on_tim [i] indicating a period during which the sensor output value after the output of the ON event is not captured, the time value is counted down by "1". However, even if the process of step S21 is performed when the values of the various registers are “0”, the values of the various registers remain “0”. Therefore, immediately after the power is turned on, the processing in step S21 is as follows.
Virtually nothing is done.

Next, at step S22, each sensor i
It is determined whether or not the flag indicating the FOT_ON_STAT status is set in the register fot_sta [i] indicating the status. FO
The T_ON_STAT state changes from time t2 to t3 as shown in FIG.
This is the period from when the timer fot_on_tim [i] is set to when the timer expires. The register fot_sta [i] stores 1 as shown in FIG.
A state register indicating a sensor sensing state of a byte (8 bits) structure, and the bit b which is the LSB thereof
1 indicates FOT_ON_STAT state or not, bit b2 above indicates FOT_ON_EVT state or not, bit b3 above indicates FOT_PEK_WCH state or not, and bit b4 above indicates the output of sensor i is threshold. TH
L (0.04 V). Therefore, the determination process performed in step S22 is performed by determining whether the bit b1 is “1” or “0”.

At this time, since the register fot_sta [i] is initially set to all "0", n is set at step S22.
It is determined as o, and the process branches to step S241. Also in step S241, since the registers fot_sta [i] are all set to "0", the determination is YES, and the bit b4 of the register fot_sta [i] is set to "1" in step S242. Further, also in step S25, since the bit b3 of the register fot_sta [i] is "0", it is determined as no, and the process branches to the point A shown in FIG. 8, and in step S31, the bit b3 of the register fot_sta [i] is cleared. The processing of step S32 is performed through the processing to be performed. In this case, the sample value in the buffer register fot_pek [i] is equal to the first reference level FOT_TRG_LVL (0.04
Since it is not equal to or higher than the threshold level thl which is the same level as V), it is determined as no in step S32, and the process branches to step S35. Then, the sample value in the buffer register fot_pek [i] is set to “0” and the timer fot_wat_tim [i] is cleared.

Then, it is determined whether or not the timer fot_wat_tim [i] has timed up at step S33 via the point B. At this time, the timer fot_wat_tim [i] has been cleared, and it is determined as yes, and the process proceeds to step S34. Register fot_
The bit b3 of sta [i] is set to “1”, the state is set to the FOT_PEK_WCH state, and the time value FOT_time is set in the timer fot_pek_tim [i].
PEK_TIM (10 ms) is set and timer fot_wat_ti
The time value FOT_WAT_TIM (80 ms) is set in m [i],
Sample value fot_spd [i] of sensor i is buffer register
Stored in fot_pek [i]. Then, the process returns to step S20 via point C.

In the next interrupt processing, the same processing is performed, various timers are counted down in step S21, and it is determined as no in step S22.
In this case, since the FOT_PEK_WCH state has been set in the previous processing, the determination in step S241 is no, and the processing in step S242 is skipped. Then, it is determined “yes” in step S25, and
At 26, it is determined whether the timer fot_pek_tim [i] has timed out.
Since the time value FOT_PEK_TIM (10 ms) is set in tim [i], it is determined to be no. Then, step S27
The output sample value of the sensor i at the first reference level
It is determined whether or not FOT_TRG_LVL has been exceeded. In this case, since it has not been exceeded, the determination is no, and the flow branches to point B. Then, the process proceeds to step S33. Here, since the timer fot_pek_tim [i] has not timed out as described above, the process of step S34 is skipped and the process branches to point C.
The above-described processing is repeated four times so that this series of processing is performed for four sensors.

In the sound generation process which is a part of the main routine shown in FIG. 10, the process proceeds to step S11 via step S10. In this case, the register fot_sta
Since the bit b2 of [i] is “0”, it is determined as no in step S11, and the process returns to step S10. This process is repeated four times corresponding to the four sensors in the same manner as the above-described interrupt process. Therefore, until the sensor i enters the FOT_ON_EVT state, no processing relating to the sensor i is performed in the sound generation processing.

However, a detailed processing flow will be described.
In this series of processing in the sensor-off state, in the processing of the first step S34, the timer fot_pek_tim [i] is set to 1
0 ms is set, so 10 ms immediately after power-on
Later, it is determined that the time is up in step S26 exactly every 10 ms, and the register fot_st is determined in step S30.
The FOT_PEK_WCH state of a_ [i] is cleared (bit b3 is cleared). Next, step S25 of the next interrupt processing
In step S31,
Step S3 via steps S32 and S35
Step 3 is performed. At this time, the timer fot_wat_tim [i]
Are cleared, various settings are made in step S34. Therefore, the register fot_sta [i] is set to FOT_PEK_
In the WCH state (bit b3 = 1), steps S25, S26, and S2 are performed in the next interrupt processing.
7. The process of step S33 is performed. Therefore, about 10
The process passing through steps S32 and S35 is performed every ms.

Next, a shock is applied to the sensor i, and the level of the output sample value becomes the first reference level FOT_TRG_LV.
When the interrupt processing is started by increasing to L or more, the value of the buffer register fot_pek [i], which is the output of the A / D converter of the foot sensor i, is set to FOT_TRG_LV in step S27.
It is determined as yes because it is larger than 0.04V which is L,
Further, since the A / D value must be larger than the value in the buffer register fot_pek [i] in which the previous A / D value is stored, the determination is also yes in step S28. Therefore, in step S29, the timer fot_pek_ti
The time value FOT_PEK_TIM (10 ms) is set again in m [i], and the time value FOT_WAT_TIM (80) is set in the timer fot_wat_tim [i].
ms) is set again and the first reference level FOT_TRG_LV
The sample output value fot_spd [i] of the new sensor i of L (0.04 V) or more is stored in the buffer register fot_pek [i]. Since the process of step S29 is executed every time a higher sample value is output from the sensor i within 10 ms, the peak value of the sensor i is detected by the processes of steps S25 to S29. The state where this peak is detected is the FOT_PEK_WCH state.

If no new peak value is detected within 10 ms before the timer fot_pek_tim [i] times out, the timer fot_pek_tim [i] times out. In S30, the FOT_PEK_WCH state is cleared, and the peak detection processing ends. Then, the process branches to the point B, and the processing of the step S33 is performed. At this point, since the timer fot_wat_tim [i] has not yet timed out,
The determination is no, and the process returns to step S20 via point C. Next, when the next interrupt process is started, it is determined as no in step S25, and the process branches to the point A.
In step S32, the determination is yes, and the process branches to point D.

Here, the processing shown in FIG. 9 is executed. In the processing shown in FIG. 9, the toe sensor priority processing is performed. First, step S40 and step S4
01 is a meaningless and wasteful process of generating a sound source ON event for the same sensor multiple times in a very short time, and is equivalent to a malfunction such as chattering. (For example, about 70 ms) is a determination process for preventing re-sounding. That is, in step S40, it is determined whether or not the register fot_sta [i] is in the FOT_ON_STAT state and the flag register i_r_on [i] is “1”.
If it is determined that the value is not “1”, the flag register i_r_on [i] is set to “1” in step S401. Then, when the next interruption passes through the point D, it is determined as “yes” in the step S40, and the processing after the step S401 is skipped.

When the processing in step S401 is completed, the destination sensor j is obtained in step S41. First, the processing when the sensor i is the toe sensor will be described. In this case, in step S41, the heel sensor of the same foot as the partner sensor is obtained, and in step S42, if the sensor i is the priority target sensor, it is determined as yes. Then, the buffer register fot_
When the peak value of the toe sensor i detected by the peak processing stored in pek [i] is equal to or higher than the second reference level FOT_ON_LVL_T (3.13 V) as shown in FIG.
In step S43, it is determined as yes and the register fot_sta
The bit b2 of [i] is set to “1”, and the toe sensor i is set to the FOT_ON_EVT state in step S44.

If the peak value of the toe sensor i detected by the peak processing stored in the buffer register fot_pek [i] does not reach the second reference level FOT_ON_LVL_T, the process proceeds to step S51. Then, the toe sensor i is obtained from the peak value detected by the peak processing stored in the buffer fot_pek [j] of the heel sensor j.
If the peak value detected by the peak processing stored in the buffer register fot_pek [i] is large, it is determined to be yes in step S51, and the process proceeds to step S52 where the bit b2 of the register fot_sta [i] is set to “1”. And
The toe sensor i is in the FOT_ON_EVT state. If the peak value of the heel sensor j is larger, it is determined that the player has not performed an operation of giving an impact to the toe sensor i, and the peak value in the buffer register fot_pek [i] of the toe sensor i is determined in step S53. , Timer fot_
wat_tim [i] is cleared.

As described above, when the sensor i is a toe sensor, if a peak value equal to or higher than the second reference level FOT_ON_LVL_T is obtained from the sensor i, the player unconditionally determines that the operation is to give an impact to the toe sensor. And the peak value is at the second reference level FOT_ON_LVL
If it does not reach _T and is greater than the peak value of the heel sensor, the player assumes that the operation is to give an impact to the toe sensor, and enters the on-event state.

Next, if the heel sensor is to be processed by the heel sensor to perform the processing of the heel sensor, the determination is no in step S42 and the process proceeds to step S46. Then, when the peak value of the toe sensor j, which is the destination sensor detected by the peak processing stored in the buffer fot_pek [j], is equal to or higher than the second reference level FOT_ON_LVL_T, the toe sensor j is turned on. Since the state is set, the player does not perform an operation of giving an impact to the heel sensor i, and the peak value of the heel sensor i and the timer fot_wat_tim [i] are cleared (set to “0”) in step S47. If the peak value stored in the buffer fot_pek [j] of the toe sensor j of the other party does not reach the second reference level FOT_ON_LVL_T,
It branches to step S48. And toe sensor j
If the peak value detected by the peak processing stored in the buffer register fot_pek [i] of the heel sensor i is larger than the peak value detected by the peak processing stored in the buffer fot_pek [j] S48
Bit b2 of register fot_sta [i]
Is set to "1" (see FIG. 8B), and the heel sensor i is set to the FOT_ON_EVT state.

Further, the buffer fot_ of the toe sensor j
The peak value detected by the peak processing stored in pek [j] is stored in the buffer register fot_pe of the heel sensor i.
When the peak value detected by the peak processing stored in k [i] does not exceed the predetermined value, the toe sensor j outputs the predetermined value.
Since the heel sensor i is a small value that does not exceed 13 V and the corresponding heel sensor i is a value smaller than the value of the toe sensor j, it is assumed that the player has not performed an operation to give an impact to the heel sensor i. S50
The peak value of the heel sensor i and the timer fot_wat_tim
[i] is cleared. In this way, in the processing of the sensor whether to perform the priority processing, the peak value of the toe sensor of the other party is larger than the peak value of the toe sensor of the other party on condition that the peak value of the toe sensor of the other party has not reached the second reference level FOT_ON_LVL_T Sometimes, the player performs an operation of giving an impact to the heel sensor i, and the heel sensor is in an on-event state.

As described above, when the sound generation process is executed when the sensor i is set to the ON event state and the bit b2 of the register fot_sta [i] is set to "1", "yes" is determined in step S11. It is determined, and the process proceeds to step S12, but the bit b1 of the register fot_sta [i] is still “0”.
Is determined to be no, and in step S16, the sensor correction value corresponding to the impact received by the sensor i
tx [i] is calculated. In step S16, the first reference level FOT_TRG_LVL shown in FIG. 5 is obtained from the sample value in the buffer register fot_pek [i] in which the peak value is stored.
Is subtracted, and the maximum sensor value MAX [i] of the sensor i is set to 1
It is normalized as 27. The normalized value tx [i] is a corrected sensor correction value, and is sent to the tone generator circuit 10 as a tone parameter of a tone corresponding to the sensor i.

Thus, a new musical tone corresponding to the sensor i is generated. The tone parameters are used, for example, as volume information and tone color designation information. Therefore, the volume and tone can be changed between when a strong impact is applied to the foot sensor 40 and when a weak impact is applied. Through the above-described processing, a tone corresponding to the sensor i is started to be generated. Then, step S1
At 7, bit b1 of register fot_sta [i] of sensor i
Is set to “1”, and a FOT_ON_STAT state indicating that a musical tone corresponding to the sensor i is generated. Further, the bit b2 of the register fot_sta [i] is set to “0” and the sensor i
Clear the FOT_ON_EVT status of the
Set the time value FOT_ON_TIM (70 ms) to im [i].

As a result, even when the sound generation process for the next sensor i is performed, nothing is performed in the sound generation process because the sensor i is not in the on-event state. However, the tone corresponding to the sensor i is continuously generated in the tone generator circuit 10. If the sensor i is set to the ON event state while the sensor i is sounding, the register fot_st is set in step S12.
It is detected that a [i] is in the FOT_ON_STAT state, the process proceeds to step S13, where it is determined from the note number information that the sensor i is sounding, and in step S14,
A message to note off the currently sounding note number is sent to the tone generator circuit 10 so as to silence the currently sounding musical tone.
Then, in step S15, the register fot_
The FOT_ON_STAT state of sta [i] is cleared, and the flag register i_r_on [i] is cleared to the initial state, so that tone generation processing corresponding to a new ON event is performed in step S16 and subsequent steps. .

When the timer fot_on_tim times out (for example, at time t3), an interrupt processing step S2 is performed to detect a new event of the sensor i.
In step S24, the determination is yes, and in step S24, the FOT_ON_STAT state of the register fot_sta [i] of the sensor i is cleared, and the flag register i_r_on [i] is further cleared to an initial state. As a result, an event can be detected when the sensor i receives a new impact. Note that the first reference level FOT_TRG_LVL is a reference level for preventing the influence of background noise,
The value is not limited to 40 mV but may be a desired value equal to or higher than the level of the background noise. Also, the second reference level
FOT_ON_LVL_T is not limited to 3.13 V, and can take a desired value according to the type of sensor or the like. Furthermore, the threshold level thl is not limited to 0.04 V, but may be an arbitrary voltage value. Furthermore, the timer fot_pek_tim, the timer fot_wat_tim, and the timer
The timer time value set in fot_on_tim is an example, and the present invention is not limited to this value.

In the above description, the case where the impact sensor is used as the foot sensor has been described. However, the present invention is not limited to the impact sensor, but can be applied to other sensors. Further, the present invention is not limited to a foot sensor, and the present invention can be applied to a unit in which a plurality of sensors are arranged at one position and an output from any of the sensors is taken in. Furthermore,
In the above description, the toe sensor is set as the priority target, but in some cases, the heel sensor may be set as the priority target.
Furthermore, in the above description, only one of the toe sensor and the heel sensor can be sounded,
Depending on the conditions, both sensors may be able to generate sound simultaneously.

[0047]

Since the present invention is configured as described above, a sensor to be preferentially sounded is defined, and a musical tone is produced according to the output of the sensor to be preferentially sounded. In this way, it is possible to produce a musical tone as desired by the player. Therefore, it is possible to improve the performance of the Mibli type electronic musical instrument.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of an electronic musical instrument to which a sound source control method for an electronic musical instrument according to the present invention is applied.

FIG. 2 is a rear view showing a configuration of a foot sensor in a sound source control system of the electronic musical instrument of the present invention.

FIG. 3 is a side view showing a configuration when a foot sensor is arranged in a shoe in the sound source control system of the electronic musical instrument of the present invention.

FIG. 4 is an exploded perspective view and a side view of a sensor mounted on the foot sensor.

FIG. 5 is a diagram illustrating an example of a signal waveform output by a sensor.

FIG. 6 is a chart of a table showing a relationship between sensors.

FIG. 7 is a flowchart showing a part of interrupt processing in the tone control method of the electronic musical instrument of the present invention.

FIG. 8 is a flowchart showing another part of the interrupt processing in the tone generator control method of the electronic musical instrument of the present invention, and
3 is a table showing the structure of a register.

FIG. 9 is a flowchart showing the rest of the interrupt processing in the tone control method of the electronic musical instrument of the present invention.

FIG. 10 is a flowchart showing a tone generation process in the tone control method of the electronic musical instrument of the present invention.

[Description of Signs] 1 CPU, 2 ROM, 3 RAM, 4 timer, 5
Sensor, 6 sensor interface, 7 switch, 8 detection circuit, 9 display circuit, 10 sound source circuit,
11 sound system, 27 first sensor section, 31
2nd sensor part, 40 foot sensor

Claims (3)

[Claims] 1. An electronic musical instrument which is attached to a body such as a hand or a foot and generates a musical sound by gesturing, wherein the same type of sensor is attached to a tip portion and a middle portion of a hand or a foot and the gesture is performed. When the output of the sensor to be given priority sound among the sensors exceeds a predetermined value, a tone corresponding to the sensor to be given priority sound is generated regardless of the output level of the other sensors, If the output of the sensor to be prioritized does not exceed a predetermined value, the musical tone corresponding to the sensor to be prioritized only when the output of the sensor to be prioritized exceeds the output of another sensor. A sound source control method for an electronic musical instrument, comprising: a processing unit configured to generate a sound. 2. The method according to claim 1, wherein when the output of the sensor to be preferentially sounded exceeds a predetermined value, sounding of a tone corresponding to another sensor is prohibited.
The sound source control method of the electronic musical instrument described. 3. An electronic musical instrument which is attached to a body such as a hand or a foot and generates a musical tone by gesturing, wherein the same type of sensor is attached to a tip portion of the hand or a foot and an intermediate portion, and the gesturing is performed. When the output of one of the sensors to be preferentially sounded exceeds a predetermined value, a tone corresponding to the sensor to be preferentially sounded is generated regardless of the output level of another sensor. Of the first sensor attached to the toe of the foot and the second sensor attached to the heel, the first sensor being a sensor to be preferentially sounded. A sound source control method for an electronic musical instrument.