JPH0625895U - Touch response device - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose is to correct the velocity value due to variations in the detection of the operation speed and operation intensity of the performance operator so that a touch response that appropriately corresponds to the operation speed can be obtained. There is. [Structure] In a setting mode, for correcting a detected velocity value due to a deviation of the stroke difference for each key, based on a stroke difference between a first contact and a second contact for detecting a key operation speed and an operation intensity. The velocity conversion tables 1 and 2 and instruction information for specifying the velocity conversion table are stored. In the normal mode, when an event code is input by pressing a key, the instruction information is read from the key No. and the velocity conversion tables 1 and 2 are used according to the instruction information.
Which of the two is to be used is determined (steps S21-S21).
Step S23). When using the velocity conversion tables 1 and 2, the detected velocity value is corrected by the table (steps S25 and S26).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a touch response device, and more specifically, it corrects variations in the detection of operation speed and operation strength of a performance operator to obtain a touch response that appropriately corresponds to the operation speed and operation strength of the performance operator. A touch response device that can be used.

[0002]

[Prior art]

 Electronic musical instruments, etc. are equipped with a touch response device in order to reflect the key pressing speed (operation speed) and key pressing strength (operation strength) of a key (performance operator) as a volume or timbre in a musical tone to be sounded. As such a conventional touch response device, for example, a first contact and a second contact, which are turned on by being pressed by a keyboard, are provided on each key with a predetermined stroke difference, and the first contact is turned on by pressing a key. The touch response is obtained from the velocity value at that time by detecting the on-time interval between the contact and the second contact. In this case, the conventional touch response device uses carbon rubber contacts as the first contact and the second contact, and the touch response is obtained from the interval at which the carbon rubber contact is pressed by the key to turn on.

[0003]

[Problems to be solved by the device]

 However, in such a conventional touch response device, since the touch response is obtained from the velocity value detected by the ON time interval between the first contact and the second contact using the carbon rubber contact, the carbon touch is obtained. When the key is pressed at the same key pressing speed and key strength due to the stroke error between the first and second contact points of the rubber contact, the mounting position of the carbon rubber contact, the surface condition of the contact part, and the dispersion of the resistance value. However, there is a problem that the first contact and the second contact of the carbon rubber contacts provided on each key have different on-time intervals, and different velocity values are detected, resulting in variations in touch response.

For example, the stroke difference between the first contact and the second contact of the carbon rubber contact (the stroke is measured at 20 mm from the key tip) is designed to be 2.5 mm, and as described above, the stroke error of the carbon rubber contact or When the stroke difference (measured value) between the first and second carbon rubber contact points varies between 2.0 and 3.0 mm due to mounting position error, etc., as shown in FIG. Then, using the velocity value table for the ON time difference between the first contact and the second contact, the velocity value is obtained from the ON time difference between the first contact and the second contact of this carbon rubber contact. When the key is pressed at a speed (250 mm / S) of 10 ms, which is the designed ON time difference from the 2nd contact point, the ON time difference between the 1st contact point and the 2nd contact point is reduced from 8ms due to the above variation. It varies up to 12ms. As a result, due to the variation in the on-time difference, as shown in FIG. 13, the velocity value varies from 14 to 74 around the center of 81 (10% of the dynamic range), and the touch response is varied. Cannot be detected accurately. Therefore, when pronunciation is performed based on such a variation in touch response, the pronunciation intensity varies considerably, and the performer feels that the keyboard is uneven.

Therefore, the present invention is a touch response device capable of obtaining an accurate touch response corresponding to the operation speed and operation intensity of a performance operator, regardless of variations in the on-time difference between the first contact and the second contact. Is intended to provide.

[0006]

[Means for Solving the Problems]

 According to the present invention, the above object is to provide a plurality of performance operators with a desired stroke difference for each of the performance operators, and to improve the operation speed or operation strength of the on operation of the performance operators. A switch means comprising a first contact and a second contact which are sequentially turned on at a corresponding time interval; a count means for counting an on-time interval of the first contact and the second contact of the switch means; Velocity conversion means for converting the count output into velocity information and outputting the velocity information; reference velocity information storage means for storing reference velocity information corresponding to the stroke difference between the first and second contact points for each of the performance operators; Read-out means for reading out the reference velocity information corresponding to the operated performance operator from the reference velocity information storage means; Correction means for correcting and outputting the velocity information output from the velocity conversion means on the basis of the reference velocity information thus generated.

In this case, for example, the correction means may set the stroke difference of the operated operation operators to L, the average stroke difference of all the operation operators to X, and the standard deviation thereof, as described in claim 2. Where σ is σ, the velocity information output from the velocity conversion means may be corrected only when the condition of L <X−σ or L> X + σ is satisfied. As described in Item 3, the stroke difference L of the operated performance operators, the average stroke difference X of all the performance operators, and the standard deviation σ are L>, having the first conversion means and the second conversion means. When X + σ, the velocity information may be corrected based on the first conversion means, and when L <X−σ, the velocity information may be corrected based on the second conversion means.

Further, in this case, the first conversion means is, for example, as described in claim 4, when the performance operator having the first contact and the second contact of the average stroke difference X is operated, Assuming a velocity conversion table for outputting the velocity information output by the velocity conversion means when the performance operator having the first contact point and the second contact point of the stroke difference X + σ is operated, the velocity conversion table outputs It is also possible to store conversion data in which the deviation of the output of the velocity conversion means is set to 0, and the second conversion means, for example, as described in claim 5, the mean stroke difference X The velocity information output from the velocity conversion means when the performance operator having the first and second contact points is operated is the first and second stroke difference values X-σ. Assuming a velocity conversion table to be output when a performance operator having two contacts is operated, conversion data for making the difference between the output by this velocity conversion table and the output of the velocity conversion means 0 is stored. You may have.

[0009]

[Action]

 According to the above configuration, when the performance operator is turned on, the switch means including the first contact point and the second contact point provided with a desired stroke difference for each performance operator is activated. The performance operator is sequentially turned on at time intervals corresponding to the operation speed or operation intensity of the on operation, and the counting means counts the on time intervals of the first contact and the second contact of the switch means. Then, the velocity conversion means converts the count output of the counting means into velocity information and outputs it.

On the other hand, the reference velocity information storage means stores reference velocity information corresponding to the stroke difference between the first and second contact points for each performance operator, and the reading means operates the operated performance operator. The reference velocity information corresponding to is read out from the reference velocity information storage means.

Then, the correcting means corrects and outputs the velocity information output from the velocity converting means based on the reference velocity information read by the reading means.

Therefore, when the performance operator is operated at the same operation speed and operation intensity, the stroke error between the first contact and the second contact of the switch means, the mounting position of the switch means, the surface condition of the contact portion, and the resistance value. Due to variations in the number of times, etc., the ON time intervals of the first contact and the second contact differ depending on the performance operator, and even if the counting means outputs different count outputs, the first contact and the second contact of the operated performance operator The velocity information can be corrected according to the stroke difference. As a result, it is possible to prevent variations in touch response, and it is possible to obtain a touch response that appropriately corresponds to the operation speed and operation intensity of the performance operator.

[0013]

【Example】

 Hereinafter, a specific description will be given based on examples.

1 to 12 are views showing an embodiment of a touch response device of the present invention.

FIG. 1 is a block diagram of a touch response device 1. The touch response device 1 includes a microcomputer 2, a program ROM (Read Only Memory) 3, a work RAM (Random Access Memory) 4, and an EEPROM (Electrically). An erase read only memory (5), other devices 6, a touch detection LSI (Large Scale Integrated circuit) 7, a switch matrix 8 and the like are provided.

The touch response device 1 is applied to an electronic piano, an electronic keyboard or the like, and the electronic piano, the electronic keyboard or the like is provided with a plurality of keys, for example, 88 keys. As shown for the white key 9 in FIG. 2, the key is rotatably fixed to a keyboard chassis or the like around its rotation center 9a, and all the white keys 9 have a first contact 10 at the bottom thereof. And a second contact 11 is provided. Carbon rubber contacts or the like are used for the first contact 10 and the second contact 11 as in the conventional case. When the white key 9 is pressed, the first contact 10 is first turned on, and then the second contact 10 is turned on. The contact 11 is turned on. The first contact point 10 and the second contact point 11 are provided so that a predetermined stroke difference, for example, 2.5 mm is the average stroke difference X. In FIG. 2, reference numeral 12 denotes a black key, and the black key 12 is also provided with the first contact 10 and the second contact 11 as with the white key 9.

The switch matrix 8 is connected to the first contact 10 and the second contact 11, and turns on / off the first contact 10 and the second contact 11 by the key common signal KC and the key-in signal KI from the touch detection LSI 7. Detects the off state.

The touch detection LSI 7 scans the switch matrix 8 by outputting the key common signal KC and the key-in signal KI to the switch matrix 8, and the first contacts provided on all the white keys 9 and the black keys 12. The on / off state of 10 and the second contact 11 is detected. The touch detection LSI 7 stores velocity curve data of the ON time difference (time interval) between the first contact 10 and the second contact 11 and the velocity value in the internal memory, and scans the switch matrix 8 during normal operation. The velocity value of the depressed key is output to the microcomputer 2 from the difference in the on-time between the first contact 10 and the second contact 11 of the same key detected by the swiping. As shown in FIG. 3, the touch detection LSI 7 assigns each key, that is, the white key 9 and the black key 12, to each of the first contact 10 and the second contact 12 provided on the key. The stored event code is stored in its internal memory, and when the ON state of the first contact 10 and the second contact 11 is detected by scanning the switch matrix 8 in the setting mode described later, the first key of the key is detected. The event code assigned to the contact 10 and the second contact 11 is output to the microcomputer 2.

The program ROM 3 stores a control program of the touch response device 1, a setting mode processing program and a normal mode processing program described later, and the same velocity curve data as the velocity curve data stored in the memory of the touch detection LSI 7. Stores curve data.

The work RAM 4 is a work memory of the microcomputer 2, and is used as a work area for statistical calculation and creation of new velocity curve data and velocity conversion table, particularly in the setting mode processing described later. .

The EEPROM 5 is rewritable but does not require electrical backup, and as will be described later, the velocity conversion table created in the setting mode process and instruction information for instructing which velocity conversion table to use. Memorize

The other device 6 is a general term for other devices, and when applied to an electronic piano, an electronic keyboard, or the like, corresponds to a sound source, a panel switch, a display device, or the like.

Next, the operation will be described.

The touch response device 1 appropriately responds to the key pressing speed and the key pressing strength even if the stroke difference between the first contact 10 and the second contact 11 provided on each key varies. You can get touch response. Therefore, first, the stroke difference between the first contact 10 and the second contact 11 of each key is detected, the stroke difference is classified based on the standard deviation of the average stroke difference, and the normal difference is calculated for each classification based on the stroke difference. A setting mode process is performed to create a velocity conversion table to be referred to when a key is pressed and to create and store instruction information for instructing the velocity conversion table to be referred to. Then, during the normal mode processing, the velocity value obtained from the on-time difference between the first contact 10 and the second contact 11 is corrected by referring to the velocity conversion table created in the setting mode processing based on the instruction information. Then, a touch response that appropriately corresponds to the key pressing speed and the key pressing strength is obtained.

First, the setting mode process will be described. This setting mode process is performed at the manufacturing stage of the touch response device 1.

The setting mode process is performed by using the key pressing device 20, as shown in FIG. This key pressing device 20 presses the white key 9 or the black key 12 at a constant key pressing speed at a certain distance (for example, 20 mm from the key tip of the white key 9) from its free end (key tip). For example, the key is pressed at 2.0 mm / S, and this key pressing operation is performed for all the white keys 9 and the black keys 12.

In the touch response device 1, when the setting mode is selected by an operation of an operation unit (not shown) or the like, the microcomputer 2 detects that the setting mode is selected and performs the setting mode process.

That is, when the power of the touch response device 1 is turned on, the microcomputer 2 first performs an initialization process such as a clear process of various registers as shown in FIG. 4 (step S 1). Check if it is in the mode (step S2). Since the setting mode is set now, the process proceeds to step S3 shown in FIG. 5 to check whether the first contact event code is input from the touch detection LSI.

That is, as described above, when the touch detection LSI 7 detects the ON state of the first contact 10 or the second contact 11 by scanning the switch matrix 8 in the setting mode, as shown in FIG. The event code assigned to the first contact 10 or the second contact 11 is output to the microcomputer 2. For example, as shown in FIG. 6, when the touch detection LSI 7 detects that the first contact 10 of the C2 key is turned on, it outputs the event code (12H) assigned to the first contact 10 of the C2 from the internal memory to the microcomputer. Output to 2.

Referring again to FIG. 5, when the event code of the first contact 10 is input, the microcomputer 2 starts the built-in timer (step S4) and determines whether the event code of the second contact 11 is input. Check (step S5).

That is, as shown in FIG. 6, when the touch detection LSI 7 detects that the second contact of the C2 key is turned on, the touch code LSI 7 outputs the event code (13H) assigned to the second contact 10 of the C2 from the internal memory. Output to the computer 2.

When the second contact event code is input, the microcomputer 2 reads the timer time S at that time, multiplies the timer time S by the key pressing speed, and calculates the stroke difference L ( Step S6). The key pressing speed is the speed at which the key pressing device 20 presses the key, and is set to 2.0 mm / S in this embodiment. The stroke difference L calculated in this way is stored in the work RAM 4 in association with the key.

Next, it is checked whether or not the above processing has been completed for all keys (step S7), and if the processing has not been completed for all keys, the processing returns to step S3 and the same processing is performed. When the processing is completed for all keys, the stroke difference L of all keys obtained in step S6 and stored in the work RAM 4 is statistically processed to calculate the average stroke difference X and its standard deviation σ (step S8). . In addition, the calculation method of this statistical processing can use an arbitrary algorithm, and is not limited at all. The average stroke difference X thus calculated and its standard deviation σ are stored in the work RAM 4.

Next, based on the average stroke difference X, the standard deviation σ, and the velocity curve data stored in the program ROM 3, + σ side velocity curve data and −σ side velocity curve data are created (step S 9 , S10), and based on the + σ side velocity curve data, the −σ side velocity curve data, and the velocity curve data in the program ROM 3, velocity conversion table 1 and velocity conversion table 2 are created (steps S11 and S12). .

Then, the stroke difference L calculated in step S6 and written in the work RAM 4 is sequentially taken out for each key (step S13), and the magnitude of the stroke difference L is checked (step S14). If the stroke difference L is within the range of the standard deviation σ about the average stroke difference X (X−σ ≦ L ≦ X + σ), the instruction information is set to 00H (step S15), and the stroke difference L is centered on the average stroke difference X. Is smaller than the standard deviation σ (L <X−σ), the instruction information is set to 10H (step S16), and the stroke difference L is larger than the standard deviation σ around the average stroke difference X (L> X + σ). At some times, the instruction information is set to 01H (step S17). This instruction information is based on the stroke difference L of each key. In the normal mode, the velocity value input from the touch detection LSI 7 to the microcomputer 2 is set to the velocity conversion table 1 and the step S11 created in step S11. Indicate which of the velocity conversion tables 2 created in step S12 is used for correction, or whether to use the inputted velocity value as it is without using any of the velocity conversion table 1 and the velocity conversion table 2. This is information for.

Next, it is checked whether the setting of the instruction information has been completed for all the keys (step S18). If the setting of the instruction information has not been completed for all the keys, the process returns to step S13 to stroke the next key. The difference L is taken out and the instruction information is similarly set (steps S14 to S17). When the setting of the instruction information for all the keys is completed, the instruction information for each key is written in the work RAM 4 as code data "00H", "01H", "10H", as shown in FIG.

When the setting of the instruction information for all keys is completed, the velocity conversion table 1, the velocity conversion table 2 and the instruction information obtained in the above processing are written in the EEPROM 5 (step S19), and the processing in the setting mode is completed. , And returns to step S2 in FIG.

Next, the + σ side velocity curve data creation processing in step S9 will be described.

The velocity curve data creation process on the + σ side is used for the key such that the stroke difference L 1 between the first contact 10 and the second contact 11 is the average stroke difference X based on the velocity curve data stored in the program ROM 3. The new velocity curve data that takes into account the deviation on the time axis caused by the stroke difference L deviating to the + side by the standard deviation σ with respect to this velocity curve data. That is, this is a process of creating + side velocity curve data, which is performed as shown in FIG.

That is, first, the variable V indicating the velocity value is set to “1” (step T 1), and the on-time difference T when the velocity value is V in the velocity curve data of the program ROM 3 is obtained. (Step T2). Next, using this on-time difference T, the on-time difference Ts is calculated from the following equation (step T3), and the calculated value of V is written in the work RAM 4 using the calculated on-time difference Ts as an address (step T4). ).

Ts = T (X + σ) / X In the above equation, the velocity value V in the velocity curve data of the program ROM 3 is that the stroke difference L between the first contact 10 and the second contact 11 is the average stroke difference X. When a certain ON time difference is T and the stroke difference L is the stroke difference X + σ, the ON time difference Ts between the first contact 10 and the second contact 11 is calculated so that the same velocity value V can be obtained. .

When the writing to the work RAM 4 is completed, the variable V is incremented by "1" (step T5), and it is checked whether the variable V has become 128 (step T6). That is, in this embodiment, the velocity value is set to a value of 0 to 127, and it is checked whether or not the processing has been completed for all possible velocity values.

If V = 128 is not satisfied, the process returns to step T2 and the incremented variable V 1 is processed in the same manner. When the above processing is performed up to V = 128, the + σ side velocity curve data as shown by the broken line in FIG. 9 can be obtained, and this + σ side velocity curve data is written in the work RAM 4 with the on-time difference Ts as an address. .

Next, the −σ side velocity curve data creation processing in step S10 will be described.

The −σ side velocity curve data creation process is the same as the + σ side velocity curve data creation process, and the velocity curve data stored in the program ROM 3 is transferred to the first contact point 10 and the second contact point. It is assumed that the stroke difference L of 11 is the optimum velocity curve data used for the key such that the average stroke difference X is used, and the stroke difference L is deviated to the − side by the standard deviation σ with respect to this velocity curve data. This is a process of creating new velocity curve data in consideration of the shift on the time axis caused by the above, that is, −σ side velocity curve data. This-[sigma] side velocity curve data creation processing is performed as shown in FIG.

That is, the variable V indicating the velocity value is set to “1”, and the on-time difference T when the velocity value is V in the velocity curve data of the program ROM3 is obtained (step T11, T12), using this on-time difference T, the on-time difference Ts is calculated from the following equation, and the set value of V is written in the work RAM 4 using this on-time difference Ts as an address (steps T13, T14).

Ts = T (X−σ) / X The above equation is the velocity value in the velocity curve data of the program ROM 3 where the stroke difference L between the first contact 10 and the second contact 11 is the average stroke difference X. When the on-time difference of V is T, and when the stroke difference L is the stroke difference X- [sigma], the on-time difference Ts between the first contact 10 and the second contact 11 that can obtain the same velocity value V is calculated. To do.

When the writing to the work RAM 4 is completed, the variable V is incremented by "1" (step T5), and it is checked whether the variable V has become 128 (step T6).

When V = 128 is not satisfied, the process returns to step T2 and the incremented variable V 1 is processed in the same manner. When the above processing is performed up to V = 128, the −σ side velocity curve data as shown by the broken line in FIG. 9 can be obtained, and this −σ side velocity curve data is written in the work RAM 4 as the ON time difference Ts as an address. It is

Next, the velocity conversion table 1 creation processing in step S11 will be described.

In this velocity conversion table 1 creation processing, when the stroke difference between the first contact 10 and the second contact 11 is X + σ, it is assumed that the stroke difference L is the average stroke difference X 1 and the velocity curve data of the program ROM 3 is The velocity conversion table 1 for converting the velocity value read out from the velocity value corresponding to the stroke difference X + σ to the stroke difference L + σ side velocity curve data created in the above + σ side velocity curve data creation processing and the velocity value in the program ROM 3 It is created based on the curve data and is performed as shown in FIG.

That is, first, the variable V indicating the velocity value is set to “1” (step Q 1), and the on-time difference Ts at the value of V is calculated from the + σ side velocity curve data of the work RAM 4 (step Q 2). . Based on the on-time difference Ts, the velocity value Vs at the on-time difference Ts is obtained from the velocity curve data in the program ROM 3 (step Q3), and the velocity value V is written as an address in the work RAM 4. (Step Q4). When the writing to the work RAM 4 is completed, V is incremented by "1" (step Q5), and it is checked whether the incremented value of V is 128, that is, whether the processing has been completed for all possible velocity values ( Step Q6). If the processing has not been completed for all velocity values, the process returns to step Q2 and the incremented V is similarly processed. When the processing for all velocity values is completed, the velocity conversion table 1 creation processing is completed.

By this velocity conversion table 1 creation processing, in the work RAM 4, for the 128 possible velocity values, when the stroke difference L is the stroke difference X + σ, the velocity value Vs is used as the address and the velocity value Vs is used as the velocity value V. Velocity conversion table 1 for converting into That is, according to the velocity conversion table 1, when the stroke difference between the first contact 10 and the second contact is the stroke difference X + σ, the stroke difference between the first contact 10 and the second contact 11 is the stroke difference X. The velocity value Vs based on the velocity curve data in the program ROM 3 can be converted and corrected to the velocity value V. In other words, the velocity conversion table 1 is assumed to be a velocity conversion table for obtaining the velocity value V given by the velocity curve data of the program ROM 3 when the stroke difference is X and when the stroke difference X + σ, This means that it is composed of conversion data in which the difference between the velocity value obtained by the assumed velocity conversion table and the velocity value obtained from the velocity curve data of the program ROM 3 is zero.

Next, the velocity conversion table 2 creation processing in step S12 will be described.

This velocity conversion table 2 creation processing is performed assuming that when the stroke difference L between the first contact 10 and the second contact 11 is the stroke difference X−σ, the stroke difference L is the average stroke difference X. The velocity conversion table 2 for converting the velocity value read out from the velocity curve data of the ROM 3 into the velocity value corresponding to the stroke difference L to the stroke difference X-σ was created by the above-σ-side velocity curve data creation process. It is created based on the side velocity curve data and the velocity curve data in the program ROM3, and is performed as shown in FIG.

That is, as in the above velocity conversion table 1 creation processing, “1” is set to the variable V indicating the velocity value, and it is turned on when the value of V is from the −σ side velocity curve data of the work RAM 4. The time difference Ts is obtained (steps Q11 and Q12), and the velocity value Vs at the time of the on time difference Ts is obtained from the velocity curve data in the program ROM 3 based on the on time difference Ts. V is written in the work RAM 4 (steps Q13, Q14). When the writing to the work RAM 4 is completed, V is incremented by "1" (step Q15), and it is checked whether the incremented value of V is 128 (step Q16). If the processing has not been completed for all velocity values, the process returns to step Q12 and the incremented V is similarly processed. When the processing is completed for all velocity values, the velocity conversion table 2 creation processing is terminated.

By the velocity conversion table 2 creation process, in the work RAM 4, for the 128 possible velocity values, when the stroke difference L is the stroke difference X + σ, the velocity value Vs is used as the address and the velocity value Vs is used as the velocity value. A velocity conversion table 2 for converting into V 1 is formed. That is, according to the velocity conversion table 2, when the stroke difference between the first contact 10 and the second contact 11 is the stroke difference X-σ, the stroke difference between the first contact 10 and the second contact 11 is the stroke difference. The velocity value Vs according to the velocity curve data in the program ROM 3 which is assumed to be X can be converted and corrected to the velocity value V. In other words, the velocity conversion table 1 is assumed to be a velocity conversion table for obtaining the velocity value V given by the velocity curve data of the program ROM 3 when the stroke difference is X and the velocity value V when the stroke difference is X−σ. The conversion data is such that the deviation between the velocity value obtained by this assumed velocity conversion table and the velocity value obtained from the velocity curve data of the program ROM 3 is zero.

The velocity conversion table 1 and velocity conversion table 2 created in this way and instruction information indicating which velocity conversion table 1 or 2 is to be used or not to be used are the EEPROM 5 Then, the touch response device 1 or an electronic piano or the like incorporating the touch response device 1 is shipped as a product in this state.

Normally, when the touch response device 1 is normally used, it is set to the normal mode, and the velocity conversion table 1, the velocity conversion table 2 and the instruction information written in the EEPROM 5 by the normal mode processing are used. And perform velocity correction processing.

Next, the normal mode processing will be described.

In this normal mode process, as shown in FIG. 4, the microcomputer 2 checks whether or not the normal mode is set after the power of the touch response device 1 is turned on and the initialization process is performed. (Steps S1 and S2) are performed by setting the normal mode. Since the normal mode is set now, the process proceeds to step S20, waits for the event code (see FIG. 3) indicating the key operation from the touch detection LSI 7, and waits for the event code to be input. Then, the key No. and velocity value V input from the touch detection LSI 7 are received (step S21).

That is, when the touch detection LSI 7 is set to the normal mode, the switch matrix 8 scans the first contact 10 and the second contact 10 provided on all the white keys 9 and the black keys 12. The on / off state of 11 is detected, and the first key of the same key detected from the velocity curve data of the on time difference (time interval) between the first contact point 10 and the second contact point 11 stored in the internal memory and the velocity value. The velocity value V of the depressed key is read out based on the difference between the ON times of the first contact 10 and the second contact 11, and is output to the microcomputer 2 and the detected key number of the key is output to the microcomputer 2. . The velocity curve data stored in the touch detection LSI 7 is the same as the velocity curve data stored in the program ROM 3 used in the setting mode as described above.

Next, the above-mentioned instruction information is read from the EEPROM 5 by the key No. input from the touch detection LSI 7 (step S22), and the read instruction information is checked (step S23). As shown in FIG. 7, this instruction information is written in the EEPROM 5 using the key number of each key as an address, and the microcomputer 2 reads this instruction information from the EEPROM 5.

When the read instruction information is “00H”, the microcomputer 2 determines that the stroke difference L between the first contact 10 and the second contact 11 of the depressed key is the standard deviation from the average stroke difference X. It is determined that it is within the range of σ, and the velocity value V input from the touch detection LSI 7 is directly adopted as the output velocity value Vo without using the velocity conversion tables 1 and 2 (step S24). When the instruction information is "01H" in step S23, the stroke difference L between the first contact 10 and the second contact 11 of the depressed key deviates from the average stroke difference X to the standard deviation σ or more to the + side. Therefore, it is determined that the velocity conversion table 1 is specified, and the velocity value V input from the touch detection LSI 7 is set as the velocity value Vs, and the velocity value written from the velocity conversion table 1 to the address Vs. V is read (step S25). The velocity value V read from the velocity conversion table 1 is adopted as the output velocity value Vo (step S24). Further, in step S23, when the instruction information is "10H", the stroke difference L between the first contact 10 and the second contact 11 of the depressed key is greater than the standard deviation σ from the average stroke difference X- It is determined that the velocity conversion table 2 has been specified because it is shifted to the side, and the velocity value V input from the touch detection LSI 7 is written as the velocity value Vs at the address Vs from the velocity conversion table 2. The velocity value V is read (step S26). The velocity value V read from the velocity conversion table 2 is adopted as the output velocity value Vo (step S24). Then, the output velocity value Vo and the key number thus adopted are output (step S27). When the touch response device 1 is applied to, for example, an electronic keyboard, the electronic keyboard performs sound generation processing based on the output velocity value Vo and the key number output from the touch response device 1.

When this output process is completed, the process returns to step S2, and the same process is performed for the next key operation.

As described above, in the setting mode, for each key, the stroke difference L between the first contact 10 and the second contact 11 provided for detecting the key pressing speed and the key pressing strength of the key is calculated. The velocity conversion table 1 and the velocity conversion table 2 for detecting and correcting the error of the velocity value V generated from the stroke difference L are created, and the velocity conversion table is calculated according to the stroke difference L for each key. The EEPROM 5 stores instruction information indicating which of 1 and velocity conversion table 2 is to be used, or neither of the velocity conversion table 1 and velocity conversion table 2 is to be used.

Then, in the normal mode, when a key press is detected, the velocity conversion table 1 and the velocity conversion table 2 are not used or the velocity conversion table 2 is not used depending on the instruction information designated by the key No. of the pressed key. It is determined which of the table 1 and the velocity conversion table 2 is to be used, and when the velocity conversion table 1 and the velocity conversion table 2 are not used, the touch detection LSI 7 strokes the first contact point 10 and the second contact point 11. The velocity value V read out from the velocity curve data set as the difference L is the average stroke difference X due to the difference in the ON times of the first contact 10 and the second contact 11 is output as it is as the output velocity value Vo. When the instruction information designated by the key No. of the depressed key designates the velocity conversion table 1, the velocity value V output from the touch detection LSI 7 is converted into the velocity conversion table 1 by using the velocity conversion table 1. The velocity value V is converted and corrected according to the stroke difference L between the first contact 10 and the second contact 11 of the depressed key, and the corrected velocity value V is output as the output velocity value Vo. Further, when the instruction information designated by the key No. of the pressed key designates the velocity conversion table 2, the velocity value V output from the touch detection LSI 7 is used by using the velocity conversion table 2. The velocity value V after the conversion is corrected and converted to a velocity value V according to the stroke difference L between the first contact 10 and the second contact 11 of the locked key, and the corrected velocity value V is output as the output velocity value Vo.

Therefore, there is an error in the stroke difference L between the first contact point 10 and the second contact point 11 for detecting the key pressing speed and the key pressing strength, the mounting position thereof, etc. Even if there is an error in the on-time difference between the point 10 and the second contact 11, the error in the velocity value based on this on-time difference can be appropriately corrected, and the key pressing speed and the key pressing strength can be appropriately supported. The velocity value V can be output. As a result, it is possible to prevent variations in the touch response, and it is possible to obtain a touch response that appropriately corresponds to the key pressing speed and the key pressing strength. Therefore, when the touch response device 1 is applied to an electronic keyboard, an electronic piano, or the like, no matter which key is pressed at the same key pressing speed and key pressing strength, the pronunciation strength does not vary, and it is appropriate. You can perform various performance operations.

In the above embodiment, the velocity conversion table 1 and the velocity conversion table 1 for correcting the velocity value V when the stroke difference L deviates from the average stroke difference X of each key by more than the standard deviation σ thereof. Since the table 2 is set, the memory capacity of the EEPR OM 5 storing the velocity conversion table 1 and the velocity conversion table 2 can be reduced, and an appropriate velocity value can be output.

In the above embodiment, the velocity conversion table 1 and the velocity conversion table 1 for correcting the velocity value V when the stroke difference L deviates from the average stroke difference X of each key by the standard deviation σ or more thereof. Although the velocity conversion table 2 is set, it is not limited to this, and the velocity value generated from the difference in ON time between the first contact 10 and the second contact 11 when the key is pressed at the same key pressing speed and key strength. What is necessary is just to be able to appropriately correct the error of.

[0071]

[Effect of device]

 According to the present invention, when the performance operator is operated at the same operation speed and operation strength, the stroke error between the first contact and the second contact, the mounting position, the surface condition of the contact portion, and the variation in the resistance value are caused. The fluctuation of the velocity value due to the different ON time intervals of the first contact and the second contact can be corrected according to the stroke difference between the first contact and the second contact. As a result, it is possible to prevent variations in touch response, and it is possible to obtain a touch response that appropriately corresponds to the operation speed and operation intensity of the performance operator.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a touch response device according to the present invention.

2 is a side view of a keyboard portion provided in an electronic keyboard or the like to which the touch response device of FIG. 1 is applied.

3 is a diagram showing an event code of each key stored in the touch detection LSI of FIG. 1. FIG.

FIG. 4 is a flowchart showing main processing, particularly processing in a normal mode.

FIG. 5 is a flowchart showing processing subsequent to FIG. 4, particularly processing in a setting mode.

FIG. 6 is an explanatory diagram illustrating an operation of outputting an event code from a touch detection LSI to a microcomputer.

FIG. 7 is a diagram showing instruction information set for each key.

FIG. 8 is a flowchart showing detailed processing of + σ side velocity curve data creation processing of FIG. 5;

FIG. 9: Basic velocity curve data and + σ side and −
The figure which shows the velocity curve data on the (sigma) side.

FIG. 10 is a flowchart showing detailed processing of a −σ side velocity curve data creation processing of FIG. 5.

FIG. 11 is a flowchart showing detailed processing of velocity conversion table 1 creation processing of FIG.

FIG. 12 is a flowchart showing detailed processing of velocity conversion table 2 creation processing of FIG.

FIG. 13 is a diagram showing touch curve data used in a conventional touch response device.

[Explanation of symbols]

 1 Touch Response Device 2 Microcomputer 3 Program ROM 4 Work RAM 5 EEPROM 6 Other Devices 7 Touch Detection LSI 8 Switch Matrix 9 White Key 10 First Contact 11 Second Contact 12 Black Key 20 Key Press Device

Claims (5)

[Scope of utility model registration request] 1. A plurality of performance operators, each performance operator having a desired stroke difference from each other, and having a time interval corresponding to an operation speed or operation intensity of an ON operation of the performance operators. First to turn on sequentially
Switch means including a contact and a second contact, counting means for counting ON time intervals of the first contact and the second contact of the switch means, and velocity conversion for converting the count output of the count means into velocity information and outputting the velocity information. Means, reference velocity information storage means for storing reference velocity information corresponding to the stroke difference between the first and second contact points for each performance operator, and reference velocity information corresponding to the operated performance operator. A reading unit for reading from the reference velocity information storage unit; and a correction unit for correcting and outputting the velocity information output from the velocity conversion unit based on the reference velocity information read by the reading unit. Characteristic touch response device. 2. When the correction means sets the stroke difference of the operated operating operators to L, the average stroke difference of all the operating operators to X, and the standard deviation thereof to σ, L <X−σ,
2. The touch response device according to claim 1, wherein the velocity information output from the velocity conversion means is corrected only when the condition of L> X + σ is satisfied. 3. The correction means includes a first conversion means and a second conversion means.
When the stroke difference L of the operated performance operators, the average stroke difference X of all the performance operators and the standard deviation σ have L> X + σ, the velocity information is converted based on the first conversion means. 3. The touch response device according to claim 2, wherein the velocity information is corrected based on the second conversion means when L <X−σ. 4. The velocity information output by the velocity converting means when the performance operator having the first contact point and the second contact point of the average stroke difference X is operated by the first converting means is calculated as the stroke difference X + σ. Assuming a velocity conversion table to be output when a performance operator having a first contact and a second contact is operated, conversion data for making a difference between the output by this velocity conversion table and the output of the velocity conversion means 0. The touch response device according to claim 3, wherein: 5. The velocity information output from the velocity converting means when the performance operator having the first and second contact points of the average stroke difference X is operated by the second converting means is converted into the stroke difference X−. Assuming a velocity conversion table to be output when the performance operator having the first and second contact points of σ is operated, the difference between the output by the velocity conversion table and the output of the velocity conversion means is set to 0. The touch response device according to claim 3, wherein the touch response device stores conversion data.