JPH04100097A - Electromusical instrument - Google Patents

Abstract

PURPOSE:To control musical tone characteristics corresponding to a playing posture by providing a standard inclination based on the inclination detected with an angle detection means, and controlling the generated musical tone characteristics corresponding to an angle difference from the present inclination. CONSTITUTION:It is discriminated whether CAL=1 is or not and if this discrimination is 'YES', the inclination alpha of an angle sensor 14 is written to an alphac resistor at an inner RAM 26 and the written value is set as a standard inclination alphac. When a player postures his standard playing posture, the inclination of a guitar body 10 is 45 degrees and when a calibration switch 24 is operated at this time, the inclination 45 deg. is set as the standard inclination alphac. Next the state of ON flag of the angle sensor is discriminated and if the flag '0' and an angle sensible switch 23 is at an off state, a constant value C is calculated and the musical tone characteristics are controlled while using the C value as the delaying value.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic musical instrument that changes the characteristics of generated musical tones depending on the inclination angle of the musical instrument body.

[Prior Art] As a conventional electronic musical instrument, for example, Japanese Patent Application Laid-Open No. 1-24309
The one disclosed in Publication No. 6 has been proposed. In this electronic musical instrument, as shown in FIG. 9, an angle sensor 3 is attached to the head 2 of the guitar body 1. It has a function of detecting angles from an angle α=0° to an inclination angle α=900 when the guitar body 1 is vertically erected.

On the other hand, as shown in FIG. 10, the effector that adds an effect to the musical sound generated as the guitar body 1 is played has a delay time of 0 to 3 m5ec depending on the inclination angle α. Controlled by characteristics that change linearly. Therefore, as shown in FIGS. 9 and 10, when a (α=0), the delay time is "O" and a musical tone without any effect is generated. Also, if b (α = 45°), the delay time is set to 1,5 m5ec, and C (α = 70°
), the delay time is approximately 2, 3 w+sec
is set to Therefore, by changing the inclination angle α of the guitar body 1 during performance, it is possible to freely control the characteristics of the generated musical tones by changing the effect addition without externally operating an effector.

[Problem B to be Solved by the Invention] However, in the case of instruments that are carried around and played, such as the guitar body 1, the basic playing posture of each player varies greatly, and for example, when starting to play, the There are various types of people, such as those who carry the guitar body 1 with an inclination angle of a, and those who carry the guitar body 1 with an inclination angle of s and c. Therefore, for example, for a person whose basic playing posture is the tilt angle a, by changing the tilt angle from the basic playing posture, it is possible to set the delay time from 0 to 3 m5ec. , for those whose basic playing posture is the angular position, a delay time of 15 m5ec is set at the time they assume the basic playing posture. For this reason, for those who use the above-mentioned angle as their basic playing posture, even if no effects are needed at the beginning of the performance, unnecessary effects consisting of a delay time of 1.5 m5ec will be added. .

The theory is that if the control characteristics are set so that the delay time becomes ○ when α = 45° as shown in Figure 11, even if the player uses the above-mentioned angle as the basic playing posture, Effects can be added based on the playing posture. However, with such control characteristics, the angle a and the angle C
For those who take angles a, b, and c as their basic playing postures, the same inconvenience as mentioned above will occur, and therefore, all those who take angles a, b, and c as their basic playing postures will be required to use the basic playing postures as their standard. Therefore, it was impossible to control musical tone characteristics.

The present invention has been made in view of these conventional problems, and provides an electronic musical instrument that makes it possible to control musical tone characteristics according to the tilt angle in accordance with the playing posture of each individual performer. The purpose is to provide

[Means for Solving the Problems] In order to solve the above problems, the present invention includes a musical instrument body that can be carried and played, and an angle detection means that is attached to the musical instrument body and detects the inclination angle of the musical instrument body. , a reference inclination angle setting means for setting a reference inclination angle based on the inclination angle of the musical instrument body detected by the angle detection means; and the reference angle set by the reference inclination angle setting means and the angle pressure detection means. angular difference calculation means for calculating the angular difference from the current inclination angle detected by the angular difference calculation means; and musical tone characteristic control means for controlling the musical tone characteristics of the musical instrument body according to the angular difference calculated by the angular difference calculation means. Further, it is preferable that a display means for visually displaying the tilt angle detected by the angle detection means is further provided.

[Operation] In the above configuration, when the reference angle setting means operates with the instrument body carried by the player tilted at an arbitrary angle, the inclination angle of the instrument body detected by the angle detection means is set to the reference angle. Set as the tilt angle. and,
When the player freely changes the inclination angle of the instrument body as he or she plays, the angle calculation means calculates the angular difference between the reference inclination angle and the current inclination angle of the instrument body, which changes sequentially, to control musical tone characteristics. The means controls musical tone characteristics in accordance with the angular difference.

Therefore, the musical tone controlled by the musical tone characteristic control means is determined by the difference between the reference inclination angle and the current inclination angle,
In other words, the characteristics depend on the angle of change from the reference inclination angle. Therefore, by setting the reference inclination angle in the basic performance posture of the player, when the instrument body is tilted from the basic performance posture, musical tone characteristics corresponding to the inclination angle can be obtained.

Furthermore, by visually displaying the inclination angle,
Changes in musical tone characteristics are recognized in response to the inclination angle.

[Example] An example of the present invention will be described below with reference to the drawings. That is, as shown in FIG. 2, the guitar body 10 is
It has a body 11, a neck 12 supported at one end by the body 1, and a head 13 provided at the other end of the neck 12.

An angle sensor 14 is disposed on the head 13,
As shown in FIG. 3(a), the angle sensor 14 has an angle of 900<α+9, where α is the angle of the guitar body 11.
At 0°, it has an output characteristic that changes linearly between 0 and 5V.

Here, -90' is a state in which the guitar body 10 is vertical with the head 13 facing downward, +90° is a state in which the guitar body 10 is vertical with the head 13 upward, and 0° is a state in which the guitar body 1o is parallel to the ground.

On the other hand, the body 2 has a circuit board 15 disposed therein, a pickup 16 and a console 17 disposed on its surface, and an output terminal 18 protruding from its side surface.

The console 17 includes a display section 19 shown in FIG.
Program No., increment switch 20, program No. Decrement switch 21, effect/
A bypass switch 22, an angle sensor enable switch 23, and a caliplay/gin switch 24 are provided.

The display unit 19 displays each program number.

Program No. 1 selected by pressing the switch 20.21 and the inclination angle of the guitar body 10 detected by the angle sensor 14 are selectively displayed. The effect/bypass switch 22 is a switch for selecting whether to add an effect to the generated musical tone or to output it without adding an effect. Further, the angle sensor enable switch 23 is
This is a switch for activating the angle sensor 14, and the cow spear brain inclination 24 is a switch operated when setting a reference inclination angle, which will be described later.

The output signal from the console 17 provided with each of these switches is transmitted to the circuit board 1 as shown in FIG.
5 is provided to the CPU 25 disposed in the
The U25 executes necessary controls in this electronic guitar based on data temporarily stored in the internal RAM 26 and programs stored in the ROM 27.

Further, the big amplifier signal from the pickup 16 is given to the DSP 31 via a switching circuit 29 and an A/D converter 30 whose sampling frequency is 32KH2,
The output of the DSP 31 is given to a sound system 36 via a D/A converter 32 and a switching circuit 33. The sound system 36 includes an amplifier 34 and a speaker 3.
5, and is connected to the output terminal 18. A bypass circuit 37 is connected between the switching circuits 29 and 33, and the bypass circuit 37 can be switched on and off by bypass relays provided in both switching circuits 29 and 33. It has become.

The output signal of the angle sensor 14 is given to the CPU 25 via the A/D converter 28, and the CPU 25 sends a bypass relay ON10FF command signal to the switching circuit 29.33 and a command signal to the DSP 31. A musical tone characteristic control signal is provided.

The ROM 27 stores a plurality of timbre programs corresponding to each program number and a selected program number set by operating the switches 20 and 21, as well as a plurality of programs for adding effects to the generated musical tones. An effect program is stored in the DSP 31.
is controlled according to the program. Further, as shown in FIG. 5, the carrier brain switch 24 is configured such that when it is released, that is, when it is not operated, the output voltage is 5V, and when it is pressed, the output voltage is oV. There is.

Next, we will discuss the operation of this embodiment according to the above configuration in the sixth section.
This will be explained according to the flowcharts shown in Figures (a) and (b). That is, execution of this flow middle step is started by turning on a power switch (not shown) provided on the guitar body 10, and first, step A1 is executed.
Then, the key information is taken in. Here, the Key
The information includes the program number and increment switch 20 shown in FIG. Program No., Decrement switch 21, Effect/Bypass switch 22, Corner 1
[Sensor enable switch 23 and Caliplay 7
This is the operating state of the slider edge 24.

Then, in the next step A2, the program NO., increment inch 20. Program No.
By operating the decrement switch 21,
It is determined whether or not there has been a program change. If this determination is YES and there is a program change, the tone program corresponding to the specified tone number is read out from the ROM 27 in step A3 program loading, and the DSP 31 is controlled from the pickup 16. The pickup signal provided via the A/D converter 30 is processed to change the musical tone characteristics.

In addition, in the next step A4 following step A2 or step A3, it is determined whether the effect/bypass switch 22 has changed compared to the previous flow, and if this determination is YES, the effect /When the bypass switch 22 is operated, the switching circuit 2
9.33)<B) Turn on or off the 4th relay.

Thereby, when the bypass relay is on, the pickup signal from the pickup 16 is directly given to the sound system 36 via the bypass circuit B37, and when the relay is off, the pickup signal is given to the sound system 36 directly through the bypass circuit B37. /D
The signal is applied to a soundon stem 36 via a converter 30, a DSP 31, and a D/A converter 32. Therefore, when the relay is on, the DSP 31 generates a musical tone with no effect added, and when the relay is off, the DSP 31 generates a musical tone with an effect added.

Then, in the next step A6 following step A4 or step A5, it is determined whether the angle sensor enable switch 23 has changed compared to the previous flow. If this determination is YES, the angle sensor ON flag is rewritten (step A7), and after reading L, the CPU 25
Angle sensor 1 digitally converted by /D converter 28
The inclination angle α of the guitar body 1o, which is the detected value of No. 4, is taken in (step A8).

Further, the CPU 25 writes the inclination angle α into the internal RAM 26 (step A9).
), a numerical value corresponding to the inclination angle α (A/D value of the angle sensor) is displayed on the display unit 19 (step A10).
. Therefore, by visually checking the value displayed on the display section 19, the player of the guitar body 10 can recognize what angle the guitar body 10 is in the current playing posture.

Then, in the next steps All and Al1, C
Performs AL flag setting and reset processing. In steps All and A12, “P” includes &1″ when the calibration switch 24 is turned on;
When turned off, "O" is set. Therefore CA
In the process of step All of calculating the exclusive OR of L and P, if there is a change in the calibration switch 24, CAL=1, and if there is no change, CAL=0.

Further, in step A12, which takes the AND of CAL and P, the CAL set in step All is “
1'', that is, when there is a change in the calibration switch 24, and P is 1'', that is, the calibration switch 24 is turned on, it becomes "1". Therefore, when the calibration switch 24 is operated through the processing in step A11 and step A12, and the manual librage gin switch 24 becomes 0N (5V) as a result of the operation (see FIG. 5), CAL=1. It will become.

Then, in the next step A13, CAL=
Determine whether it is 1 or not, and if this determination is YES,
α of the internal RAM 26. Write the inclination angle α at this time to the register, and this written value is the reference inclination angle α.

It is set as closing. That is, when the player assumes his or her basic playing posture, the angle of inclination of the guitar body 10 is 45 degrees, and when the carrier brain switch 24 is operated at this time, the angle of inclination is 45''. The reference inclination angle α is set as follows.

Then, in the next step A15, the state of the angle sensor ON flag is determined, and the flag is 0'',
When the angle sensor enable switch 23 is in the OFF state, a constant value C is set as rC=Vt-e+・e.
is calculated (step A17), and the musical tone characteristics are controlled using the value of C as the delay value. therefore,
When the angle sensor enable switch 23 is in the OFF state, even if the guitar main body 10 is tilted, the musical tone characteristics do not change according to the tilt angle, but are adjusted to a constant value C according to a preset tone number. A musical tone having a certain characteristic is emitted from the sound system 36.

On the other hand, in the determination result of step A15, if the angle sensor ON flag is "bi" and the angle sensor enable switch 23 is in the on state, the angle-parameter function rc= (v+, +V +ae+) + eJ
@C is calculated, and the musical tone characteristics are controlled using the value of C as the delay value. Here,■、、、、、、
V(ac) is the output voltage from the angle sensor 14 at the current tilt angle α of the guitar body 10, and V(ac) is the output voltage from the angle sensor 14 at the reference angle α written with the steering knob A14. Also, e is the sampling frequency of the A/D converter 30. Therefore, the sampling frequency f s -32K Hye tare is e=32 000, and ■t-c+=2.
5, then C= (Vtat 2.5)
・e=(v+#+2.5) ・32. OOO and f:'), V.

The delay is at-2.5 (sec).

That is, from the output voltage V, #, at the current tilt angle to the output voltage VI at the reference tilt angle,
By subtracting aC+ and taking the difference as the delay, -
If the carry brain switch 24 is turned on at 90° and -900 is the reference tilt angle, the output voltage of the angle sensor 14 at -90° is "0" as shown in Figure 3 (a). Because of this, C” (V＋＊＋−0)
'e=Vm'e. Therefore, in this case, as shown in FIG.
The delay time changes linearly between ° and +90°, and when the tilt angle is 45°, the delay time is 3.75
(sec).

Further, for example, if the cow shaft calibration switch 24 is pressed when the angle is -45° and the reference inclination angle is set to -450, then the reference angle is -45° as shown in Fig. 3 (C).
From ° to maximum angle +90°, delay time is 0~
The delay time changes linearly up to 3.75 seconds, and when the inclination angle is 45 degrees, the delay time is 2.5 (sec).

Therefore, when the performer assumes his or her basic playing posture, by turning on the calibration switch 24 and setting the reference inclination angle αC, the reference inclination angle α can be set.
. The delay time can be set from O to a predetermined value depending on the angle of the guitar body 10 from the angle. Therefore, even if the basic performance posture of each performer is different, the reference inclination angle α is set by operating the calibration switch 24. The musical tone characteristics can be changed by changing the angle from the position of the instrument, thereby making it possible to set appropriate musical tone characteristics that match the musical idea in a comfortable posture.

Moreover, as mentioned above, since the current tilt angle is displayed on the display section 19, it is possible to change the musical tone characteristics while visually checking the tilt angle, thereby making it possible to precisely control the musical tone characteristics. It will become.

Note that the change control of musical tone characteristics is executed by the process performed by the DSP 31 according to the flowchart shown in FIG.

That is, in step B1, the pickup 16
Input data g obtained by A/D converting the pickup signal from
Write 9 to address n of the data RAM of internal RAM 26,
In the next step B2, rgn=g, ``g+-c
After calculating the new value of go as +・dJ, the internal R
Increment the address of AM26 (step B3)
.

Here, as shown in FIG. 8, d is a coefficient by which the output from the delay element 38 is multiplied in the multiplier circuit 39, and the value multiplied by this coefficient d and gn are added to the adder circuit 39.
By adding and outputting at 0, a delay is provided.

[Effects of the Invention] As explained above, the present invention sets a reference inclination angle based on the inclination angle detected by the angle detection means attached to the musical instrument body, and calculates the angle between the reference inclination angle and the current inclination angle. The characteristics of the generated musical tones are controlled according to the difference. Therefore, when carrying the instrument while playing,
Even if the basic performance posture differs from performer to performer, the musical tone characteristics can be changed by changing the angle from the standard inclination angle.
It becomes possible to set it in a comfortable posture.

Furthermore, since the angle of inclination detected by the angle detection means is visually displayed, it is possible to change the musical tone characteristics while visually checking the angle of inclination.This allows precise control of musical tone characteristics. becomes possible.

[Brief Description of the Drawings] Fig. 1 is a block diagram showing the overall circuit configuration of the present invention, Fig. 2 is a plan view showing the main body of the musical instrument of the same embodiment, and Fig. 3 (
A) is a tilt angle-output voltage characteristic diagram of the angle sensor of the same example. Figure 3 (B) is a tilt angle when the calibration switch is not pressed at all and when the calibration switch is pressed at -90°. Angle-delay time characteristic diagram, Figure 3 (C) is a tilt angle-delay time characteristic diagram when the calibration switch is pressed at -45°, Figure 4 is a plan view of the console of the same example, Figure 5 shows
An explanatory diagram of the operation of the Caliplay/B switch of the same embodiment; Figures 6 (A) and (B) are control flowcharts of the same embodiment; Figure 7 is a flowchart showing the details of delay processing; Figure 8 Figure 9 is an explanatory diagram showing the inclination angle of the guitar body during performance. Figures 10 and 11 are inclination angles in conventional portable and playable electronic musical instruments. It is a delay time characteristic diagram. 10...Guitar body, 19...Display section, 24...
Calibration switch, 25...CPU, 31
...DSPo Figure 2 Patent applicant Casio Computer Co., Ltd. Figure 10 Figure 11

Claims (2)

[Claims] (1) A musical instrument body that can be carried and played, an angle detecting means attached to the musical instrument body to detect the tilt angle thereof, and a reference tilt based on the tilt angle of the musical instrument body detected by the angle detecting means. a reference inclination angle setting means for setting an angle; and an angular difference calculation means for calculating an angular difference between the reference angle set by the reference inclination angle setting means and the current inclination angle detected by the angle detection means; An electronic musical instrument comprising: musical tone characteristic control means for controlling characteristics of a musical tone to be generated according to the angular difference calculated by the angular difference calculating means. (2) The electronic musical instrument according to claim 1, further comprising display means for visually displaying the tilt angle detected by the angle detection means.