JP4078769B2 - Musical sound control apparatus and recording medium recording musical sound control processing program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a musical tone control device and a recording medium on which a program for musical tone control processing is recorded.
[0002]
[Prior art]
Electronic musical instruments, effectors, and other musical tone control devices are provided with an operator that continuously displaces in response to an operation, such as a pedal, a bender lever, or a wheel that is a foot controller. Such an operation element is stationary at a predetermined position (home position) by an elastic member such as a spring when the operation is not performed. The user can operate the operation element in a predetermined direction or in the opposite direction against a spring or the like, and control a musical sound parameter set in advance according to the displacement position. For example, in a keyboard instrument, when a parameter for controlling the pitch (pitch) of the musical sound data is set for the pedal, the musical sound data input by pressing the key by depressing the pedal while playing the keyboard. It is possible to generate expressive musical sounds by slightly changing the pitch of.
[0003]
[Problems to be solved by the invention]
However, the conventional musical tone control apparatus has a problem that noise occurs after an operator is operated in a predetermined direction or a reverse direction for any musical tone to control parameters. For example, if you depress the pedal and control the pitch of the musical tone according to its displacement position, while the reverberation of the musical tone is still occurring, the pedal position is restored by the spring of the pedal. When you take your foot off the pedal for a musical tone, the pitch of the musical tone that is being sounded changes abruptly, generating noise. An object of the present invention is to prevent noise from being generated when a musical tone parameter is controlled by an operator that is continuously displaced.
[0004]
[Means for Solving the Problems]
The musical tone control apparatus according to claim 1 is an operation means that continuously displaces according to an operation in a predetermined direction or in the opposite direction, a position detection means that detects a displacement position of the operation means, and the position detection means. An operation discriminating unit that discriminates an operation direction of the operation unit from the detected displacement position, and when the operation discriminating unit determines that the operation direction is the predetermined direction, according to the displacement position detected by the position detection unit. until said a parameter control means for changing the parameter values of the tone to be generated, said operating means from the time it is determined that the operation direction is changed in the opposite direction from the predetermined direction by said operation determination means reaches the predetermined position And a volume control unit that suppresses the volume of musical sound .
Recording medium according to claim 3, a position detection step of detecting a displacement position of the operating means for continuously displaced in accordance with the predetermined direction or a reverse operation, by the detected displacement position by the position detection procedure An operation determination procedure for determining the operation direction of the operation means, and when the operation direction is determined to be the predetermined direction by the operation determination procedure , a musical sound to be generated is generated according to the displacement position detected by the position detection procedure. A parameter control procedure for changing a parameter value, and a volume of sound generation of the musical sound from when it is determined that the operation direction has changed from the predetermined direction to the reverse direction by the operation determination procedure until the operation means reaches a predetermined position. A computer-readable musical tone control processing program for causing a computer to execute a volume control procedure for suppressing the sound is recorded.
According to the first or third aspect of the invention, when the operation direction of the operating means that continuously displaces in response to an operation in a predetermined direction or in the opposite direction is a predetermined direction, the operation means depends on the displacement position. When the parameter value of the musical sound to be generated is changed and the operation direction is changed from the predetermined direction to the reverse direction, the volume of the musical sound is suppressed .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a musical sound control apparatus according to the present invention will be described in detail with reference to the drawings, taking an effector as an example.
FIG. 1 is a diagram illustrating a system configuration of an effector in the embodiment. The CPU 1 exchanges commands and data with the ROM 2, RAM 3, switch unit 4, and display unit 5 connected to the system bus, and also connects via an A / D converter 6 connected to the input port. Position data is input from a pedal (foot controller) 8 connected to 7.
The ROM 2 stores a musical sound control processing program executed by the CPU 1 and a plurality of types of parameters of musical sounds. The RAM 3 temporarily stores data input from the switch unit 4 and the pedal 8, data processed by the CPU 1, and data to be given to the display unit 5.
[0006]
The CPU 1 is connected to a DSP (Digital Signal Processor) 9 and sends various parameters to the DSP 9. The DSP 9 controls the musical sound data according to these various parameters. That is, a high-frequency component of a musical tone signal input from an electronic musical instrument (not shown) to the input terminal 10 is removed by a low-pass filter LPF 11, converted to a digital signal musical tone data by an A / D converter 12, and input to a DSP 9. Then, the DSP 9 controls the musical sound data according to the parameter given from the CPU 1, sends it to the output circuit 13, and outputs it from the output terminal 14 to the sound system (not shown).
[0007]
FIG. 2 shows the structure of the pedal 8. The movable portion 8a and the fixed portion 8b are coupled so as to be rotatable via a shaft portion 8c. Although not shown in the drawing, a spring member is provided between the movable portion 8a and the fixed portion 8b, and pushes the movable portion 8a to the opposite side of the fixed portion 8b, that is, to the upper side in the figure. Accordingly, the user performs an operation of depressing the movable portion 8a of the pedal 8 with his / her foot and displacing it against the elastic force of the spring member. When the foot is released from the movable portion 8a, the movable portion 8a returns to the original position by the spring member. Therefore, the user performs an operation of displacing the movable portion 8a upward by utilizing the elastic force of the spring member by loosening the stepped foot. That is, the pedal 8 constitutes an operating means that continuously displaces in response to an operation in a predetermined direction (lower side) or the opposite direction (upper side). In the driving range of the movable portion 8a, the displacement position is converted into a digital signal by the A / D converter 6 as position data and input to the CPU 1. Therefore, the CPU 1 constitutes a position detection unit that detects the displacement position of the pedal 8.
[0008]
FIG. 3 is an external view of this effector and is a diagram showing the configuration of the switch unit. The PARA “+” switch 41a and the PARA “−” switch 41b are switches for specifying the parameter IDs (00 to 21) shown in FIG. 4, and select the type of parameter to be specified by operating these two switches. The selected parameter name is displayed on the display unit 5. The VALUE “+” switch 42 a and the VALUE “−” switch 42 b are switches that increase or decrease the parameter values to be set. The Min switch 43 and the Max switch 44 are switches for setting a lower limit and an upper limit of a parameter value range corresponding to the driving range of the pedal 8.
[0009]
In addition to these switches, the switch unit includes a Down switch 45, an Up switch 46, a MODE switch 47, a WRITE switch 48, and an EDIT switch 49. The function of each switch will be described later.
[0010]
FIG. 4 is a diagram showing the contents of parameters controlled by the effector of this embodiment. Each parameter is classified into Wah, Compressor, Distortion, and Output (output), but is specified by an ID that is a parameter identification number that is further classified. In the example of this figure, 22 types of parameters identified by IDs 00 to 21 can be set. The content of the control is shown in pedal control (PedalControl).
[0011]
For example, as shown in MainControlParam, 22 types of parameters from 00 to 21 can be controlled by the pedal 8. In addition, as shown in MainControlMode, there are three modes for control, Normal (normal), Mute (mute), and Hold (hold). Each mode will be described later. The mode is switched by the MODE switch 47 of FIG. MainControlMax indicates a parameter setting value when the pedal 8 is depressed to the maximum, and MainControlMin indicates a parameter setting value when the pedal 8 is not depressed. FIG. 5 shows an example of the relationship of the parameter value to the pedal depression amount.
[0012]
Next, the operation of the effector of this embodiment will be described with reference to FIGS. FIG. 6 shows names and contents of various registers and flags provided in the RAM 3. 7 to 11 are flowcharts of a program of the musical tone control process of the CPU 1.
FIG. 7 is a main flow, and after the predetermined initialization process (step A1), the following loop process is executed. That is, it is determined whether or not the edit switch is turned on (step A2). When this switch is turned on, the flag EF is inverted (step A3). After EF is inverted or when the edit switch is not turned on in step A2, it is determined whether or not EF is 1 (step A4). When EF is 1, an edit process is executed (step A5), and when EF is 0, a performance process is executed (step A6). After the edit process or the performance process, the process proceeds to step A2 to determine whether the edit switch is on or off.
[0013]
8 and 9 are flowcharts of the edit process. In FIG. 8, it is determined whether or not the PARA “+” switch has been turned on (step B1). When this switch is turned on, the value of the ID that is the parameter identification number is incremented (step B2). It is determined whether or not PARA “−” is turned on (step B3). When this switch is turned on, the value of ID is decremented (step B4). That is, the parameter controlled by the pedal is selected by operating the PARA “+” switch or the PARA “+” switch.
[0014]
Next, it is determined whether or not the VALUE “+” switch is turned on (step B5). When this switch is turned on, the parameter value register X (ID) corresponding to the ID is incremented (step B6). It is determined whether or not the VALUE “−” switch is turned on (step B7). When this switch is turned on, X (ID) is decremented (step B8). It is determined whether or not the pedal is operated (step B9). When the pedal is operated, the parameter value corresponding to the displacement position of the pedal is set to X (ID) (step B10). That is, the parameter value is set by operating the VALUE “+” switch, the VALUE “−” switch, or the pedal.
[0015]
In FIG. 9, it is determined whether or not the Max switch is turned on (step B11). When this switch is turned on, the value of X (ID) is set in the register PMAX (step B12). It is determined whether or not the Min switch is turned on (step B13). When this switch is turned on, the value of X (ID) is set in the register PMIN (step B14). That is, when the Max switch is turned on, the parameter value set to X (ID) at that time is set as the upper limit value of the parameter to be controlled. Further, when the Min switch is turned on, the parameter value set to X (ID) at that time is set as the lower limit value of the parameter to be controlled.
[0016]
Next, it is determined whether or not the Down switch is turned on (step B15). When this switch is turned on, the ID value is set in the parameter setting register DC when the pedal is depressed, and the depression sensitivity register DS is set. The value of sensitivity data SENS (ID) of the parameter corresponding to the ID is set (step B16). It is determined whether or not the Up switch is turned on (step B17). When this switch is turned on, the ID value is set in the parameter setting register UC when the pedal is stepped back, and the step back sensitivity register US is set. The value of sensitivity data SENS (ID) of the parameter corresponding to the ID is set (step B18).
[0017]
In step B1 to step B4 in FIG. 8, this setting is different from the parameter set as the pedal control target by the operation of PARA “+” and PARA “−”, depending on the operation speed and operation direction of the pedal. This is a setting for controlling one parameter. That is, three different parameters are controlled by pedal operation.
[0018]
In step B19 of FIG. 9, it is determined whether or not the WRITE switch is turned on. When this switch is turned on, the data set by the processing of step B1 of FIG. 8 to step B18 of FIG. 9 is shown in FIG. Store in the corresponding area of the indicated RAM (step B20). Next, in step B21, it is determined whether or not the MODE switch is turned on. When this switch is turned on, the value of the mode register MD is incremented (step B22). At this time, it is determined whether or not the MD value exceeds 3 (maximum value) (step B23), and when the MD value exceeds 3, the MD value is set to 1 (step B24). After executing the processing corresponding to the operation of each switch, the process returns to the main flow of FIG.
[0019]
10 and 11 are flowcharts of performance processing in the main flow. In FIG. 10, it is determined whether or not the pedal is operated (step C1), and when there is no pedal operation, the process returns to the main flow. When the pedal is operated, the current value of the pedal, that is, position data indicating the current displacement position of the pedal is set in the register C1 (step C2). Next, the value of the register C0 in which the position data by the previous pedal operation is set is subtracted from the value of C1, and the subtraction result is set in the difference position register D (step C3). Then, the value of C1 is set to C0 to prepare for the next pedal operation (step C4).
[0020]
Next, it is determined whether or not the value of C1 is 0 (step C5). That is, it is determined whether or not the displacement position has returned to the home position of the pedal as a result of the current pedal operation. If the value of C1 is 0, the mute flag MF is set to 0 (mute off) (step C6), and the peak value register P is set to 0 (step C7). After the setting of MF and P, or when the value of C1 is not 0, the value of MD is determined (step C8).
[0021]
When the MD value is 1 (normal mode), the value of C1 is set in the calculation coefficient register V (step C9), and the value obtained by the arithmetic expression PARA [V] based on the value of V is set as the parameter. A set value register PARA is set (step C10). PARA [V] is calculated by assuming that the maximum value of the parameter range specified by ID is MAXRNG.
MAXRNG × {PMIN + (PMAX−PMIN) × V}
It is represented by Accordingly, the value of the parameter controlled by the pedal is a function of the calculation coefficient V. Then, the parameter value of the tone to be generated is changed according to the value of PARA [V]. The parameter value set in PARA is sent to the DSP, and the musical sound data input from the electronic musical instrument is controlled according to the parameter value.
[0022]
In step C8, if the MD value is 2 (mute mode), it is determined whether or not the D value is negative (step C11). If the value of D is negative, that is, if the pedal position data is smaller than the previous value and the pedal is stepped back, 1 (mute on) is set in MF (step C12). If D is not negative, it is determined whether or not the value of MF is 1 (step C13). After setting MF to 1 in step C12 or when the value of MF is 1 in step C13, 0 (silence) is set to the volume value register VOL (step C14). In step C13, when MF is 0 (mute off), the value of C1 is set in the calculation coefficient register V (step C9), and the value obtained by the arithmetic expression PARA [V] based on the value of V Is set in the parameter setting value register PARA (step C10).
[0023]
When the MD value is 1, that is, in the mute mode, as indicated by the solid line in FIG. 12 (1), the value of D is always positive in the process in which the pedal depression position (pedal position) increases with time. , Step C11, Step C13, Step C9. Therefore, the calculation coefficient changes according to the value of C1, that is, the pedal position. In this case, when the operation direction of the pedal as the operation means is a predetermined direction, that is, the depression direction, the parameter value of the musical sound to be generated is changed according to the displacement position.
[0024]
On the other hand, as shown by the dotted line in FIG. 12 (1), when the pedal operation changes from the stepping direction to the reverse direction, that is, the stepping back direction, the value of D becomes negative, so the process proceeds to Step C11 and Step C12. The value of MF becomes 1 (mute on), and in step C14, the DSP is instructed to mute (suppress volume). At this time, the parameter value does not change, and the parameter value corresponding to the final displacement position in the depression direction is held. After this, even if the pedal operation is changed again in the depression direction and the value of D changes from negative to positive, the process proceeds to step C11, step C13, and step C14, so that the DSP is instructed to mute. However, when the pedal position is returned to the home position by the pedal return operation, the value of C1 becomes 0, and 0 (mute off) is set to MF in step C6, so the mute instruction is canceled.
[0025]
In step C8, if the MD value is 3 (hold mode), it is determined whether or not the value of C1 is larger than the value of P (step C15). Initially, the value of P is set to 0 in step C7. Therefore, if the pedal is depressed slightly and the value of C1 is not 0, the value of C1 is larger than the value of P. In this case, the value of C1 is set to P (step C16), and the value of P, that is, the value of C1 is set to V (step C17). Then, the value obtained by the arithmetic expression PARA [V] based on the value of V is set in the parameter setting value register PARA (step C10).
[0026]
In step C15, when the value of C1 is smaller than the value of P, the displacement position of the pedal becomes small, that is, the pedal operation changes from the stepping direction to the reverse direction, that is, the stepping back direction. In this case, the process proceeds to step C15 and step C17, and the value of P is set to V (step C17). Then, the value obtained by the arithmetic expression PARA [V] based on the value of V is set in the parameter setting value register PARA (step C10).
[0027]
That is, as indicated by the solid line in FIG. 12 (2), in the process of increasing the displacement position while the pedal operation direction is the depressing direction, the specified parameter value changes according to the displacement position. However, as shown by the dotted line in the figure, when the operation position of the pedal changes from the depression direction to the reverse direction and the displacement position decreases, the final displacement position in the depression direction is held at P as a peak value. Therefore, the parameter value corresponding to the peak value is held. When the pedal operation direction changes to the depressing direction again, when the displacement position corresponding to the retained parameter value is exceeded, the retention of the parameter value is released and the new displacement position is changed. Update to parameter value.
[0028]
In step C10, the value obtained by the arithmetic expression PARA [V] based on the value of V is set in the parameter setting value register PARA and sent to the DSP, or in step C14, VOL is set to 0 and the DSP is set. After instructing to mute, the process proceeds to FIG. 11 to control another parameter according to the operation speed and operation direction of the pedal. That is, it is determined whether the value of D is negative or positive (step C18), and the operation speed and operation direction of the pedal are determined.
Although the value of D itself is the difference between the previous and current displacement positions, that is, the difference position, the time interval of the calculation process of D in step C3 in FIG. 10 is one cycle time of the main flow that loops at a substantially constant time. Therefore, the value of D is substantially a displacement amount per unit time and represents an operation speed.
[0029]
When the value of D is negative and the pedal operation direction is the retraction direction, the value of D is multiplied by the US value, that is, the up parameter sensitivity, and the value obtained by subtracting the multiplication result from the parameter value of PARA is the new parameter. It is updated as a value (step C19). On the other hand, when the D value is positive and the pedal operation direction is the depression direction, the value obtained by multiplying the D value by the DS value, that is, the down parameter sensitivity, and subtracting the multiplication result from the PARA parameter value is newly set. It is updated as a parameter value (step C20). After updating the parameter value in step C19 or C20, the process returns to the main flow.
[0030]
Thus, in the above-described embodiment, the CPU 1 includes a position detection unit that detects the displacement position of the pedal, which is the operation unit, an operation determination unit that determines the operation direction of the pedal based on the detected displacement position, and the operation direction of the pedal. The parameter control means for controlling the parameter value according to the above is configured. Then, if the pedal operation direction that is continuously displaced in response to the stepping direction (predetermined direction) or the opposite direction is the stepping direction, the parameter value of the tone to be generated is changed according to the displacement position. However, when the operation direction changes from the step-down direction to the reverse direction, the parameter value of the tone to be generated is not changed regardless of the displacement position.
Therefore, it is possible to prevent noise from being generated when the musical tone parameters are controlled by the operation element that is continuously displaced.
[0031]
In this case, when the operation direction changes from the stepping direction to the reverse direction, the CPU 1 holds a parameter value corresponding to the final displacement position in the stepping direction. Therefore, even if the displacement position is disturbed by an inadvertent pedal operation, the parameter value set intentionally immediately before that is not lost.
[0032]
Furthermore, in this case, as in the mute mode shown in FIG. 12 (1), after the parameter value corresponding to the final displacement position is held, the sound volume of the musical tone is suppressed until the pedal reaches the home position. To do. Therefore, it is possible to mute noise generated by a sudden change in the displacement position during the step-back operation for the next sound generation.
[0033]
Alternatively, as in the hold mode shown in FIG. 12 (2), after holding the parameter value corresponding to the final displacement position, the pedal is operated in the stepping direction, and the final displacement position is set. When it exceeds, the holding of the parameter value is released, and the parameter value is updated to the new displacement position. Therefore, the parameter value can be controlled as if the stepping-back operation was not performed by setting the parameter value according to the displacement position when it is always displaced in the stepping direction.
[0034]
In the above embodiment, the CPU 1 reads and executes the musical tone control processing program stored in the ROM 2 of the effector. However, the musical tone control processing program is recorded on a recording medium such as a floppy disk, and a personal computer or the like is recorded. The general-purpose information processing apparatus may be executed. In this case, the invention of the recording medium is constituted. Alternatively, the musical sound control program may be downloaded via a communication line and executed by a personal computer or the like.
[0035]
【The invention's effect】
According to the present invention, when the operating direction of the operating means that continuously displaces in response to an operation in a predetermined direction or in the opposite direction is a predetermined direction, the parameter value of the musical sound to be generated is changed in accordance with the displacement position. When the operation direction changes from the predetermined direction to the reverse direction, the tone volume of the musical tone is suppressed . Therefore, it is possible to prevent noise from being generated when the musical tone parameters are controlled by the operation element that is continuously displaced.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a system configuration of an effector in an embodiment.
FIG. 2 is a three-dimensional view showing the structure of the pedal in FIG. 1;
FIG. 3 is a plan view showing the external appearance of the effector of FIG.
FIG. 4 is a view showing the contents of musical sound control parameters in the effector of FIG. 1;
FIG. 5 is a diagram showing a relationship of a parameter value to a pedal depression amount.
6 is a view showing the contents of registers and flags provided in the RAM of FIG. 1;
FIG. 7 is a main flowchart executed by the CPU of FIG. 1;
8 is a flowchart of edit processing in FIG. 7;
FIG. 9 is a flowchart of edit processing following FIG. 9;
FIG. 10 is a flowchart of the performance process in FIG.
FIG. 11 is a flowchart of performance processing following FIG.
FIG. 12 is a diagram showing a temporal transition of a displacement position according to pedal operation.
[Explanation of symbols]
1 CPU
2 ROM
3 RAM
4 Switch section 5 Display section 6 A / D converter 8 Pedal 9 DSP

Claims (3)

Operation means that continuously displaces in response to an operation in a predetermined direction or in the opposite direction;
Position detecting means for detecting the displacement position of the operating means;
An operation discriminating means for discriminating the operating direction of the operating means from the displacement position detected by the position detecting means;
This when the operation direction by the operation determination means has been determined that the predetermined direction in response to the detected displaced position by the position detecting means, a parameter control means for changing the parameter values of the tone to be generated,
Volume control means for suppressing the tone volume of the musical sound until the operation means reaches a predetermined position after the operation determination means determines that the operation direction has changed from the predetermined direction to the reverse direction;
A musical sound control apparatus comprising:   The parameter control means holds a parameter value corresponding to a final displacement position in the predetermined direction when the operation direction changes from the predetermined direction to the reverse direction. Musical tone control device. A position detection procedure for detecting a displacement position of the operating means that continuously displaces according to an operation in a predetermined direction or in the opposite direction;
An operation determination procedure to determine the operation direction of the operation means by the detected displacement position by the position detection procedure,
The operation determination when the procedure the operation direction by is determined that the predetermined direction in response to the detected displaced position by the position detection procedure, and the parameter control procedure for changing the parameter values of the tone to be generated,
A volume control procedure for suppressing the tone volume of the musical sound from when it is determined by the operation determination procedure that the operation direction has changed from the predetermined direction to the reverse direction until the operation means reaches a predetermined position ;
Recording medium for recording a program of computer readable tone control process for executing a computer.

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