JPH03192396A - Musical sound controller - Google Patents

Abstract

PURPOSE:To obtain the musical sound controller which can generate a musical sound close to that of a rubbed musical instrument, etc., by providing a mechanism which can add diverse expressions to the rising sustenance, falling etc., of a musical sound by operation on the surface. CONSTITUTION:A central processing unit (CPU) 12, a program memory 14, a working memory 16, a speed conversion memory 18, a pen pressure-bow pressure conversion memory 20, a coordinate and pressure detecting circuit 22, a key depression detecting circuit 24, an operation detecting circuit 26, a sound source circuit 28, etc., are connected to a bus 10. When input operation is started with an electronic pen 34A while key code data is set in a register KCR1, diverse expressions can be added to the rising of the musical sound according to how the operation force is applied. Then the various expressions can be added to the musical sound by adjusting the operation speed and/or operation pressure even during musical sound generation and even when musical sound attenuation is started thereafter, various expressions can be added to the falling of the musical sound according to how the operation force is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a musical tone control device suitable for simulating musical tone generation of bowed string instruments, wind instruments, and the like.

[Summary of the Invention] The present invention provides an operating means that can be operated on a surface, generates speed information based on the operating position detected in response to the operation of the operating means, and generates musical tones based on this speed information. By controlling the characteristics, it is possible to create a variety of performance expressions similar to those of bowed string instruments.

[Prior Art] Conventionally, electronic musical instruments that can control musical sound characteristics such as timbre and volume according to operating speed, operating pressure, etc. have been designed to detect the speed at which keys are pressed on a keyboard and control the rising waveform of musical sounds. There are known devices that control the continuous waveform of musical tones by detecting the key press pressure during key presses.

[Problems to be Solved by the Invention] In general, bowed stringed instruments such as violins, chieguchi, and violas can be operated in two directions: pulling and pushing the bow, and the bow speed, circular pressure, etc. can be controlled in each direction. This makes it possible to add various expressions to the rise, sustain, fall, etc. of musical tones.

On the other hand, in the conventional electronic musical instruments mentioned above, the key pressing speed is detected by measuring the contact transition time of a switch linked to the key, so one piece of speed information is obtained for each key pressing operation. However, it is not possible to control the musical tone according to speed changes during bow operation, as in the case of bow operation.
Further, since the movable range of the key is narrow, the range of speeds specified by pressing the key is also narrow, and it is not possible to specify an arbitrary speed in a wide range as in the case of bow operation.

Furthermore, in the conventional electronic musical instruments described above, although the key pressing speed and key pressing pressure during key pressing are reflected in the musical tone, the key operation speed during key pressing is not reflected in the musical tone.

Therefore, it is not possible to perform performance expressions by combining pressure and speed, such as changing the speed while keeping the pressure constant, or changing the pressure while keeping the speed constant, as in the case of bow operation.

An object of the present invention is to provide a new musical tone control device that is capable of various performance expressions similar to those of bowed stringed instruments and the like, and that is also capable of controlling musical tones using a new operation method that is completely different from conventional methods.

[Means for Solving the Problems] A musical tone control device according to the present invention includes (a) an operating means that can be operated on a surface, and (b) an operation that corresponds to the operating position or displacement amount according to the operation of the operating means. a detection means for detecting information; (c) an information generation means for generating speed information based on the operation information from the detection means; and (d) a control of musical tone characteristics based on the speed information from the information generation means. control means.

[Function] According to the configuration of the present invention, an operating means that can be operated on a surface is provided, and the musical tone characteristics are controlled by specifying the speed based on the operating position or displacement amount detected from the operating means. Therefore, it is possible to specify any speed within a wide range, and various expressions can be added to the rise, sustain, fall, etc. of musical tones.

Moreover, the operation means that can be operated on a surface have a wider range of operation than the operation means that can only be operated in a reciprocating manner.
Another advantage is that there is a greater degree of freedom in performance expression.

In the musical tone control device of the present invention, the information generating means may generate speed information corresponding to the operating position. In this way, the speed can be changed simply by changing the operating position. It is easy to operate. Also,
The information generating means may be configured to generate speed information corresponding to the operating speed. In this way, the operating speed will be directly reflected in the musical sound characteristics, and the performance will be closer to the performance of a bowed string instrument, etc. Become. Furthermore, it may be possible to arbitrarily select a first mode in which speed information is generated in accordance with the operating position or a second mode in which speed information is generated in accordance with the operating speed. You can play in your favorite mode.

In the musical tone control device of the present invention, the detection means detects the operating pressure according to the operation of the operating means and generates pressure information corresponding to the operating pressure, and the control means detects the speed information from the information generating means and the detected pressure information corresponding to the operating pressure. The musical sound characteristics may be controlled based on the pressure information from the instrument. In this way, the musical sound characteristics will reflect not only the speed but also the pressure, making it even more suitable for playing bowed string instruments. It gets closer.

[Embodiment] FIG. 1 shows the configuration of an electronic musical instrument according to an embodiment of the present invention, in which musical tone generation is controlled by a microcomputer. Note that in FIGS. 1, 5, and 6, a diagonally shaded signal line indicates that it includes a plurality of signal lines or that it transmits information of a plurality of bits.

Circuit (Figure 1 bus lO includes a central processing unit (cPU) 12, a program memory 14, a working memory 16, a speed conversion memory 18, a pen pressure-circular pressure conversion memory 2o, a coordinate/pressure detection circuit 22, a key press detection circuit 24, an operation detection circuit 26, a sound source circuit 28, etc. are connected.

The CP 1312 executes various IA operations for generating musical tones according to programs stored in the memory 14, and these processes will be described later with reference to FIGS. 13 to 16. Regarding the CPU 12, the timer circuit 3
2 is provided, and this circuit 32 is provided with 1 to IO [ms
], preferably a timer clock signal TMC having a clock period of 3 [ms] is supplied to the CPU 12 as an interrupt command signal.

The working memory IB includes a large number of registers used in various processing by the CPU 12, and the registers related to the implementation of the present invention will be described later.

Regarding the coordinate/pressure detection circuit 22, a two-dimensional input panel 34 known as a digitizer is provided. Various types of digitizers have been proposed, including a switch array method, a voltage drop method, an encoder method, a magnetic field phase method, a capacitive coupling method, an ultrasonic method, a magnetostrictive method, an electromagnetic induction method, and an electromagnetic exchange method. can be used.

In this embodiment, the input panel 34 is a combination of a liquid crystal display panel and a digitizer that is electromagnetic and can detect pressure, and an electronic pen 34A is used as the coordinate indicator. As the electronic pen 34A, it is possible to use one equipped with a pen tip switch that detects contact with the input cover panel 34, but since contact detection can be replaced by pressure detection on the input cover side, an electronic pen without a pen tip switch can be used. It is convenient to use the input panel 34 that can display 0, which may be used, because it allows input operations to be performed while checking the coordinates specified with the electronic pen 34A on the display.

The coordinate/pressure detection circuit 22 detects the X and Y coordinates and operating pressure indicated by the electronic pen 34A within the effective reading area ER of the input panel 34.

The speed conversion memory 18 includes a position-speed conversion memory 18A and a distance-speed conversion memory 18B. The memory 18A converts the X coordinate value (operation position) detected by the detection circuit 22 into speed data according to the conversion characteristics illustrated in FIG. The moving distance per unit time (operating speed) determined from the X and X coordinate values is converted into speed data according to conversion characteristics as illustrated in FIG. In this embodiment, either a position mode using speed data corresponding to the operating position or a speed mode using speed data corresponding to the operating speed can be arbitrarily selected by operating the mode switch.

The pen pressure-circular pressure conversion memory 20 is provided to obtain pressure data that matches the pressure sensation of a person performing, and converts the pressure (pen pressure) detected by the detection circuit 22 into, for example,
It converts into pressure (5 pressure) data according to the conversion characteristics shown in the figure. Note that it is also possible to use the pressure data from the detection circuit 22 as is without performing such conversion.

The key press detection circuit 24 detects key press information (key on/off and key code information) for each key on the keyboard 36.

The operation detection circuit 26 detects operation information for each switch in the switch group 38 including the mode switch described above.

The tone generator circuit 28 forms and outputs a musical tone signal TS based on the aforementioned speed data, pressure data, key press information, etc., and will be described in detail later with reference to FIG. 5.

The musical tone signal TS from the tone source circuit 28 is supplied to a sound system 40 including an output amplifier, a speaker, etc., and is produced as a musical tone.

Figure 5 shows an example of the configuration of the tone generator circuit 28, and this circuit 28 includes four tone generators TGI to TG4 corresponding to the four strings of a violin.

Therefore, in this embodiment, up to four tones can be produced simultaneously. The sound sources TGI to TG4 have the same configuration and operate in the same way, and the configuration and operation of TGI will be described below as a representative.

The register VR stores speed data read from the memory 1B, and the speed data VEL from this register is supplied to each of the sound sources TG1 to TG4. Also,
The register PR stores pressure data read from the memory 20, and the pressure data PR3 from this register is supplied to each of the sound sources TGI to TG4.

Registers KCRI to KCR4 are provided corresponding to the sound sources TGI to TG4, respectively, and store key code data (pitch data) corresponding to keys pressed on the keyboard 36. Key code data KCI to C4 from registers KCR1 to KCR4 are supplied to key code to delay amount conversion mechanisms DMI to DM4, respectively.

The conversion memories DMI to DM4 all store first and second delay amount data for each key of the keyboard 36. The first and second delay amount data for each key are transmitted to the first and second delay means (for example, 60 and 68 in FIG. 6) by dividing the total delay amount corresponding to the pitch of the key at a predetermined distribution ratio. The first delay amount The data represents a delay amount of DX, and the second delay amount data represents a delay amount of DX(1-K).

As an example, the conversion memory DMI converts the input key code data KCI into corresponding first and second delay amount data DLCII and DLC12 in pitch, and supplies these data to the sound source TGI. Note that when the value of the register KCRI is 0 (that is, there is no key code data), data that makes the first and second delay means of the sound source TGI non-conductive is supplied as data DLCII and DLC12.

Regarding the other sound sources TG2 to TG4, the delay amount data DLC21°22 to I
) LC41, 42 are supplied.

The tone generator circuits TGI to TG4 all generate tone waveform data in digital format based on the tone source control information supplied as described above, and the tone waveform data W01 to WO4 from the tone generators TG1 to TG4 are generated by the mixing circuit. Mixed at 50. Then, the musical sound waveform data from the mixing circuit 50 is converted into an analog format musical tone signal TS by a digital/analog (D/A) conversion circuit 52, and this musical tone signal TS is supplied to the sound system 40 (FIG. 1). be done.

Sound Source TGI (FIG. 6) FIG. 6 shows an example of the configuration of the sound source TGI, which is configured to simulate a bowed string sound.

The variable delay circuit 60, filter 62, multiplier 64, adder 66, variable delay circuit 68, filter 70, multiplier 72, and adder 74 are connected in a closed loop to form a data circulation path. The total delay time of the circulation path is the chord (
vibrating body), that is, corresponds to the fundamental wave period of the generated sound. The state of propagation and distribution of vibrations on the string is expressed by waveform data circulating through the data circulation path.

The delay circuits 60 and 68 are set and controlled so that their respective delay amounts become values indicated by the delay amount data DLCII and DLC12. A pitch corresponding to the total delay amount of delay circuits 60 and 68 is given to the waveform data circulating through the data circulation path.

In other words, since the pitch of the generated musical tone is strictly determined by the sum of the delay amounts in the closed loop, the total delay amount of the circuit 60.68 should be determined in advance by considering the delay amounts of filters, etc. other than the circuit 60.68. If you do this, you will get a pitch that corresponds to the total amount of delay.

The filters 62 and 70 are for simulating loss corresponding to vibration propagation due to the material of the string and for simulating nonlinearity of propagation velocity with respect to frequency, and a low-pass filter is used for the former simulation.

Moreover, for the latter simulation, an all-pass filter is used, and the generation of non-integer harmonics is realized by utilizing the non-linearity of its frequency versus delay characteristic.

Multipliers 64 and 72 multiply the cyclic waveform data by negative coefficients from coefficient generators 76 and 78, respectively, thereby simulating phase inversion corresponding to reflection of vibration waves at one end and the other end of the string. It is. In this case, the negative coefficient is −
1, and if you want to assume that there is a steady loss, you can select an appropriate value in the range of O to -1 corresponding to the loss, and you can control the value by changing it over time if desired. .

Adders 66 and 74 are for introducing excitation waveform data from the nonlinear conversion section NL into the data circulation path.

The velocity data VEL is supplied to the nonlinear conversion unit NL via adders 82 and 84. This conversion unit NL is provided to simulate nonlinear changes in the bowed string, and the adder 8
4, a nonlinear conversion memory 88 that receives the output of this divider as input, and a multiplier 90 that receives the output of this memory as input. is supplied with pressure data PRS, and the multiplier 9
Excitation waveform data is output from 0.

FIG. 7 shows an example of a nonlinear change in a bowed string, where the horizontal axis shows the relative speed of the bow to the string, and the vertical axis shows the displacement speed applied from the bow to the string. When the bow speed is around 0, the contribution of static friction is dominant, so the string displacement speed increases linearly with the increase in bow speed, but when an external force above a certain level is applied, dynamic friction becomes dominant and the string displacement speed suddenly increases. It is known that since the degree of contribution of external force to the string displacement speed decreases, a nonlinear change occurs as shown in FIG. 7. It is also known that in the transition between static friction and dynamic friction, a hysteresis phenomenon occurs as shown in FIG.

In order to simulate the nonlinear change shown in FIG. 7, numerical data is stored in the nonlinear conversion memory 88 according to the conversion characteristic shown by the solid line A in FIG. 8, for example. In order to simulate changes in the static friction area according to circular pressure, a divider 86 and a multiplier 90 are provided on the input and output sides of the memory 88, respectively, to perform division and multiplication with the pressure data PRS. The input of the memory 88 is the pressure data P.
When divided by RS, the characteristic in Figure 8A becomes the same as the dot-dashed line B in the same figure.
When the output of the memory 88 is multiplied by the pressure data PR3, the characteristic shown in FIG.
The characteristics are as shown in . Note that in order to make it possible to change the characteristics according to the pressure data PRS, in addition to the calculation method described above, the conversion characteristics are stored in the memory 88 for each pressure value, and the conversion characteristics to be used are changed according to the pressure data. It may be specified according to PR3.

As an example, when speed data showing changes over time as shown in FIG. 9 is input to the nonlinear converter NL, excitation waveform data as shown in FIG. 10 is output from the nonlinear converter NL, and the adder 86. 74 into the data circuit.

In order to simulate the hysteresis phenomenon described above, the nonlinear conversion unit NL includes a low-pass filter (LPF) 92 that receives the output Q of the multiplier 90, and a multiplier that multiplies the output of this filter by the coefficient from the coefficient generator 96. A feedback path is provided that includes a multiplier 94 and an adder 84 that adds the output of this multiplier to the output S of the adder 82 and supplies the added output S° to the divider 86.

The LPF 92 is provided to prevent oscillation and to compensate for gain or phase, but since the output waveform of the nonlinear converter NL also changes depending on the filter characteristics, it is also possible to obtain a change in timbre.

- As an example, the conversion characteristic (input S°
When the nonlinear conversion unit NL has the following characteristics (characteristics of output Q),
If the feedback rate β = 0.1 (10%), the conversion characteristics of the circuit section including the feedback path and the nonlinear conversion section NL (characteristics of input S versus output Q) have hysteresis characteristics as shown in Fig. 12. Become something. In this case, for example, the coefficient generator 9
If the feedback rate is changed by changing the coefficient generated at 6, the hysteresis characteristic can be changed. Also, speed data V
If the feedback rate is changed and controlled according to the EL or pressure data circulation path, it becomes possible to generate a musical sound that more closely resembles a bowed sound. Note that in order to obtain the hysteresis characteristic, the method is not limited to the above-mentioned feedback method, but it is also possible to store conversion characteristics in the memory 88 for each direction of change in the input value, detect the direction of change in the input value, and select the conversion to be used. Characteristics may also be specified.

Adder 98 adds the outputs of multipliers B4 and 72 and supplies the added output to adder 82.

By providing such an adder 98, the cyclic waveform data is again input to the data circulation path via the nonlinear conversion section NL, and complex waveform changes can be obtained.

Tone waveform data WO1 consisting of cyclic waveform data is derived from the output side of the multiplier 72, for example. The position at which the musical waveform data is derived is not limited to the one shown in the figure, but may be any position where the waveform data circulates. Further, instead of deriving only from one location, the results derived from multiple locations may be mixed and output.

The above-mentioned sound source TGI has a delay loop structure including a filter, so when excitation waveform data is input to the data circulation path from the nonlinear conversion section NL that represents the relationship between the 0 string and the bow, which exhibits so-called comb filter characteristics. , waveform data representing a harmonic spectrum configuration corresponding to the resonance peak frequency of the comb filter is circulated via the data circulation path.

The sound source TGI has velocity data VEL and pressure data PR3.
Tone waveform data Wo1 is generated on the condition that data DLCII and DLC12 indicating the amount of delay are supplied. Therefore, keyboard 3
When no key is pressed in step 6, or when the key code data is not set in the register KCRI even if a key is pressed, no musical waveform data is generated even if an input operation is performed with the electronic pen 34A on the input panel 34. Also, register KCR
Even if key code data is set in I, the electronic pen 34
Tone waveform data will not be generated unless the input operation by A is performed.

When an input operation using the electronic pen 34A is started with the key code data set in the register KCRI, various expressions can be added to the rise of the musical tone depending on how the operation force is applied at that time (for example, rapidly or gradually). can. By adjusting the operating speed and/or operating pressure even while the musical sound is being generated, various expressions can be added to the musical sound.
For example, depending on whether it is rapid or gradual, various expressions can be added to the falling edge of a musical tone.

The same expression as described above is added to the register KCRI in response to a key press after starting an input operation using the electronic pen 34A.
This is also possible when key code data is set in .

On the other hand, if the register KCRI is cleared in response to a key release while a musical tone is being generated, the delay circuits 60 and 68 become non-conductive, so that the musical tone rapidly attenuates. In addition, the electronic pen 34 can be used without clearing the register KCRI while a musical tone is being generated.
When the input operation by A is stopped, the cyclic waveform data suffers a loss in the circulation path, so the musical tone gradually attenuates. Therefore, two types of damping modes, rapid and slow, can be obtained.

The attenuation control associated with key release is not limited to making the delay circuits 60 and 68 non-conductive, but may also be controlled by connecting a variable attenuator in the data circulation path and increasing the degree of attenuation in response to key release detection. method or gain of filter 62 and/or 70!
It is also possible to adopt a method such as a method of controlling the amount of water to be lowered in response to 1 isa detection.

Working Memory 16 Among the registers in the working memory 16, those related to the implementation of the present invention are listed below.

(1) Mode register MD...This is set to ``1'' or ``0'' according to the operation of the mode switch; ``1'' indicates speed mode, and ``O'' indicates position mode. represents.

(2) Key code register KCD: Each time a key-on or key-off event is detected via the detection circuit 24, key code data corresponding to the key related to the event detection is stored.

(3) Sound source on/off register KOR...This includes four registers KORI to KOR4 corresponding to registers KCRI to KCR4 in Fig. 5, respectively.If each register is 1'', the corresponding sound source is This indicates that the sound is being generated, and if it is 0'', it indicates that the sound is not being generated.

(4) Xi keyaki register X---This is where the X coordinate value detected via the detection circuit 22 is set.

(5) yPilPIA register Y: The X coordinate value detected via the detection circuit 22 is set in this register.

(6) Pressure register P: The pressure value detected via the detection circuit 22 is set in this register.

(a) Pen status register PSW... This is used when the electronic pen 34A has a pen tip switch. If the pen tip switch is on (contact), 1" is off (off). (non-contact), "0" is set.

(8) Old X coordinate register XP...This is register
The X coordinate value is set from . Register X indicates the X coordinate value at the time of the current timer interrupt, while register XP indicates the X coordinate value at the time of the previous timer interrupt.

(8) Old y-coordinate register YP...This is register Y
The X coordinate value is set from , indicating the X coordinate value at the time of the previous timer interrupt.

(10) Data flag OLD...This is register
It represents the presence or absence of data in p and YP, and “1”
``If there is data, ``O'' means there is no data.

(11) Distance register DIST...This is used to set moving distance data per unit time as shown on the horizontal axis in FIG.

Main Routine FIG. 13 FIG. 13 shows the flow of processing of the main routine, and this routine starts when the power is turned on.

First, in step 100, various registers are initialized. For example, all registers (1) to (11) mentioned above are cleared. Then, the process moves to step 102.

In step 102, it is determined whether there is a key-on event on the keyboard 36, and if there is (Y), the 14th key-on event is detected in step 104.
A key-on subroutine is executed as described below with respect to the figure.

If the determination result in step 102 is negative (N) or the process in step 104 is completed, step 10
6, it is determined whether there is a key-off event on the keyboard 36. If this judgment result is positive (Y), step 10
8, a key-off subroutine is executed as described below with reference to FIG.

If the determination result in step 106 is negative (N) or the process in step 108 is completed, step 11
0, and it is determined whether there is an on event in the mode switch. If this judgment result is positive (Y), step 11
Moving on to 2, subtract the contents of MD from “1” and set it as MD.
Set to . That is, when the content of MD is 0'', MD is set to 1, and when the contents of M and D are 1'', MD is set to 0''.As a result, the position mode and The speed mode is alternately specified each time the mode switch is turned on.

If the determination result in step 110 is negative (N) or the process in step 112 is completed, step 11
4, other processing (for example, setting processing for volume, etc.) is executed. After this, the process returns to step 102 and the subsequent processes are repeated in the same manner as described above.

Key-on subroutine Figure 14 shows the key-on subroutine. In step 120, the key code related to key-on is input to the KCD.
Set to . Then, the process moves to step 122.

In step 122, the content of one of the KORs is “0”.
If the result of this judgment is negative (N), all the sound sources are in use, so the process returns to the routine of FIG. 13 without performing key code assignment processing. Note that even if all the sound sources are in use, the sound sources may be rewritten in the order starting from the sound source that is turned on first.

When the determination result in step 122 is affirmative (Y), the process moves to step 124, and one of the registers KCR (KCRI in FIG. 5) corresponding to the KOH determined as "0" is
~KCR4) Set the KcD(7) key code. The process then proceeds to step 126.

In step 126, "1'" is set in the KOH corresponding to the KCH related to the key code set.

Then, the process returns to the routine shown in FIG.

According to the routine shown in FIG. 14, for example, when KORI is 0'', a key code is set in KCRI and 1'' is set in KORI, allowing the tone generator TGI to generate musical tones.

Key-off subroutine Figure 15 shows the key-off subroutine. In step 130, the key code related to key-off is input to the KCD.
Set to . Then, the process moves to step 132.

In step 132, it is determined whether any of the KCRs has the same key code as the KCD. This judgment result is negative (
If N), the musical tone corresponding to the key that was turned off is not being generated, and no key-off processing is necessary, so the process returns to the routine shown in FIG. 13.

If the determination result in step 132 is affirmative (Y), the process moves to step 134, and the KCR with the same key code is
Clear the KOR corresponding to (set to “0”). Then, in step 13B, the KCR with the same key code is cleared, and then the process returns to the routine shown in FIG.

According to the routine in FIG. 15, for example, KCRI and KCD
If the same key code is found, KORI and KC
Both RI are cleared, and in response to the clearing of KCRI, the delay circuit 60. of FIG. 6 is activated in the sound source TGI. H becomes non-conductive, and the musical tone being generated begins to decay. It should be noted that all muting processing may be performed in response to a pen release operation (change of the value of P or PSW to 0) without performing clearing by key-off.

Timer Interrupt Routine (Figure 16) Figure 16 shows a timer interrupt routine, and this routine starts at a cycle of, for example, 3 [ms] for each clock panel of the timer clock signal TMC.

First, in step 140, the X coordinate value, the X coordinate value, and the pressure value are taken from the detection circuit 22, and the X, Y, and P
Set to . Further, when the electronic pen 34A has a pen tip switch, the state signal (“1” or “0”) of the pen tip switch is set to psw.

Next, in step 142, it is determined whether any of the KORs is "0". If the result of this determination is affirmative (Y), none of the sound sources is generating musical tones and no processing is necessary, so the process returns to the routine of FIG. 13.

If the determination result in step 142 is negative (N), the process moves to step 144, and it is determined whether the value of P is 0 (whether the electronic pen is not in contact). When using an electronic pen 34A that has a pen tip switch, instead of determining whether it is P-0, it is determined whether the contents of PSW are 0''.Even if the result of such a determination is positive (Y), Since the processing described below is not necessary, the process returns to the routine shown in FIG. 13.

If the determination result in step 144 is negative (N), the process moves to step 146, where the pressure data corresponding to the value of P is read from the memory 20 and set in the register PR (FIG. 5). Then, the process advances to step 148.

In step 148, it is determined whether the content of the MD is "1" (speed mode), and if the result of this determination is negative (N), the process proceeds to step 150.

At step 150, speed data corresponding to the value of X is read from the memory 18A and set in the register VR (FIG. 5). Through the process of step 150, it is possible to specify the speed according to the X coordinate value (operation position in the X direction) as shown in FIG.
If the X coordinate value is specified on the right side, a positive velocity value corresponding to it will be obtained. This corresponds to the bow speed or input in the drawing direction in FIG. 7 or 8. Furthermore, if an X coordinate value is specified on the left side of x, /2, a corresponding negative velocity value will be obtained. This corresponds to the bow speed or input in the pushing direction in Figure 347 or Figure 8.

When the process of step 150 is completed, the process returns to the routine of FIG. 13.

If the determination result in step 148 is affirmative (Y), the process moves to step 152, and the content of OLD is “0” (X
(There is no data in p and YP). For example, if step 152 is reached for the first time after the power is turned on, the determination result in step 152 is affirmative (Y), and step 1
54 years old.

In step 154, OLD is set to 1''. Then, in step 156, the values of X and Y are set in xp and Y, respectively, and the process returns to the routine of FIG.

After this, when the routine of FIG. 16 is entered again, step 1
The determination result of step 52 is negative (N), and step 158
Move to.

In step 158, the following equations (1) and (2) are calculated by setting the values of X, Xp, Y%Yp (7) to X%xP, Y, Yp, respectively.

Xp −x (2
) Then, the value obtained by calculating +1) with the sign obtained by calculating formula (2) is set in DIST. After this, the process moves to step 160.

At step 160, the speed data corresponding to the value of DIST is read from the memory 18B, and the speed data is read from the register VR (FIG. 5).
Set to . Then, in step 156, the values of X and Y are set to xP and YP, respectively, and then the process returns to the routine of FIG.

According to the processing in steps 152 to 160, the moving distance per unit time as shown in FIG. 3 is 1! (operation speed on the surface)
It is possible to specify the speed according to the speed. For example, input cover panel 3
4, if you move the electronic ben 34A to the right, the difference (X
The sign of p-X) is negative, resulting in a positive velocity value in FIG. This corresponds to the bow speed or input in the drawing direction in FIG. 7 or 8. Furthermore, if the ben 34A is moved to the left by B, the sign of the difference becomes positive and a negative velocity value is obtained in FIG. This corresponds to the bow velocity or input in the pushing direction in FIG. 7 or 8.

In step 158 described above, the sign (Yp-Y) may be added instead of the sign (Xp-X).
In this way, the direction from y-0 to 3/=Y wa corresponds to the pushing direction, and the opposite direction corresponds to the pulling direction. In this case, in step 150,
The speed data corresponding to the value of Y may be read from the memory 18A and set in VR, and in this way, speed can be specified according to the operating position in the y direction.

i Biao 1 This invention is not limited to the above embodiments, but can be implemented in various modified forms.

For example, the following changes are possible.

(1) The present invention is applicable not only to multitone electronic musical instruments but also to single-tone electronic musical instruments.

(2) The operating means is not limited to a digitizer type one, but a plane movable one such as a mouse may also be used.

Further, the input panel is not limited to one using an input tool such as a ben, but may be one that allows touch input.

(3) The sound source circuit is not limited to one that simulates a stringed instrument, but may also be one that simulates a wind instrument or other well-known sound source circuits.

(4) Velocity information may be converted into acceleration information and used for musical tone control.

[Effects of the Invention] As described above, according to the present invention, it is possible to add various expressions to the rise, sustain, fall, etc. of a musical tone by operating on the surface, so it is possible to generate a musical tone similar to that of a bowed string instrument, etc. The following effect can be obtained. Furthermore, since the operating means that can be operated on the surface is used, there is an advantage that there is a greater degree of freedom in performance expression.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an electronic musical instrument according to an embodiment of the present invention. FIGS. 2, 3, and 4 are graphs illustrating conversion characteristics of memories 18A, 18B, and 20, respectively. FIG. 5 is a circuit diagram showing the configuration of the sound source circuit 28, FIG. 6 is a circuit diagram showing the configuration of the sound source TGI, FIG. 7 is a graph illustrating nonlinear change in the bowed string, and FIG. 8 is nonlinear conversion. 9 and 1O are waveform diagrams showing input and output examples of the nonlinear conversion section NL, respectively. FIG. 11 is a graph illustrating an example of the nonlinear conversion characteristics. FIG. 12 is a graph showing an example of applying hysteresis due to feedback, FIG. 13 is a flowchart showing the main routine, FIGS. 14 and 15 are flowcharts showing key-on and key-off subroutines, respectively, and FIG.
3 is a flowchart showing a timer interrupt routine. 10...Bus, 12...Central processing unit, 14...
Program memory, 16... Working memory, 18
... Speed conversion memory, 20... Pen pressure-circular pressure conversion memory, 22... Coordinate/pressure detection circuit, 24... Key press detection circuit, 26... Operation detection circuit, 28... Sound source circuit, 32... Timer circuit, 34... Input cover panel, 34
A-...electronic pen, 3...keyboard, 38...switch group, 40...sound system, TGI~TG4...
・Sound source, DMI to DM 4--Key code-delay amount conversion memory.

Claims (1)

[Scope of Claims] 1. (a) An operating means that can be operated on a surface; (b) a detection means that detects operation information corresponding to the operating position or displacement amount in accordance with the operation of the operating means; ( c) an information generating means for generating speed information based on the operation information from the detecting means; and (d) a control means for controlling musical tone characteristics based on the speed information from the information generating means. . 2. The musical tone control device according to claim 1, wherein the information generating means generates speed information corresponding to the operating position. 3. The musical tone control device according to claim 1, wherein the information generating means generates speed information corresponding to the operating speed. 4. The information generation means has a mode selection means for arbitrarily selecting the first or second mode, and when the first mode is selected, generates speed information corresponding to the operating position, and 2. The musical tone control device according to claim 1, wherein the musical tone control device generates speed information corresponding to the operating speed when the 2nd mode is selected. 5. The detection means detects operating pressure in accordance with the operation of the operating means and generates pressure information corresponding to the operating pressure, and the control means detects the operating pressure according to the operation of the operating means, and the control means detects the speed information from the information generating means. 5. The musical tone control device according to claim 1, wherein musical tone characteristics are controlled based on pressure information from the detection means.