JP3666469B2 - Music signal control method, music signal generator and program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a musical tone signal control method, a musical tone signal generating apparatus, and a program suitable for use in an electronic musical instrument having a controller function.
[0002]
[Prior art]
In a musical sound device such as an electronic musical instrument, the basic volume is set by the level value L set in the amplifier. Furthermore, in order to perform real-time control of the volume, a controller such as a wheel or aftertouch is used, the level value L is multiplied by the operation amount C of the controller, and a volume according to the multiplication result is generated. These controllers are usually set to have a basic volume when the operation amount C of the controller is set to the center. Further, a sensitivity value (Sencitivity) S of −100% to 100% is provided, and the sensitivity value S is defined by the rate of change in the operation amount C of the controller with respect to the change in volume, and the multiplication amount is limited to a predetermined range. Play a role. Therefore, an effective logarithmic display of the volume G that determines the generated volume is a value obtained by adding a value obtained by multiplying the level value L by the operation amount C of the controller and the sensitivity value S thereof.
(Equation 1)
Effective volume G = level value L + sensitivity value S * operation amount C of the controller [dB]
(However, -100% ≤ S ≤ 100%)
[0003]
[Problems to be solved by the invention]
Since the output value of the multiplier is finite, when a large value is set for the level value L and the sensitivity value S, the value is saturated at the maximum value of the effective sound volume G in the range where the operation amount C of the controller is increased. On the other hand, when a small value is set for the level value L and a large value is set for the sensitivity value S, the effective sound volume approximates to the minimum value in a range where the controller value is small. As a result, there is a problem that the sound volume does not change even though the user is operating the controller, which causes the user to feel uncomfortable.
The present invention has been made in view of the above-described circumstances, and provides a musical tone signal control method, musical tone signal generating apparatus, and program in which the volume changes as needed even if the controller value is set to an arbitrary value. For the purpose.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is characterized by having the following configuration. The parentheses are examples.
The musical tone signal control method according to claim 1, wherein the musical tone signal is controlled by specifying a parameter, and the value of the parameter changes in accordance with the operation amount (C) of the operator. ), A parameter maximum value setting process in which the processing device (1000) presets a parameter maximum value (L) , which is the maximum value of the parameter , in the storage device (1200). The processing device (1000) has a parameter minimum value within a variation range that is a minimum value of the parameter within a variation range of the manipulated variable (C) and a gradient of the parameter change with respect to a change in the manipulated variable (C). and sensitivity value setting process of setting the sensitivity values (S) in the storage device independently (1200) said parameter maximum value for (L) which determines the said processing device 1000) is the parameter maximum value (L), the sensitivity values (S), based on the operation amount (C), and parameter determination process of determining the parameters (gain G) to be imparted to the tone signal ( 160).
Furthermore, in the configuration according to claim 2, in the musical tone signal control method according to claim 1, in the parameter determination step (160), the sensitivity value (S) is a maximum value of the sensitivity value (S) . is set to a maximum sensitivity value, when the operation amount (C) is set to the minimum operation amount (0) is the minimum value of the manipulated variable, irrespective of the value of the parameter maximum value (L) said parameters ( This is a process of determining the parameter (gain G) so that the gain G) becomes a parameter minimum value which is the minimum value of the parameter .
Furthermore, in the configuration according to claim 3, in the musical tone signal control method according to claim 1, in the sensitivity value setting step, the sensitivity value (S) is set to any one of a negative value, zero, and a positive value. When the sensitivity value (S) is set to zero in the sensitivity value setting process, the parameter (gain G) is related to the manipulated variable (C) in the parameter determination process (160). The parameter is determined to be the maximum parameter value (L) .
Furthermore, in the configuration according to claim 4, in the musical tone signal control method according to claim 1, the musical tone control device includes a plurality of the operators, and the sensitivity value setting process includes the plurality of operators. A plurality of sensitivity values (S 1, S 2, S 3,...) Respectively corresponding to the control values are set. ) And the corresponding sensitivity values (S1, S2, S3,...), A plurality of numerical values (term 1, term 2, term 3,. these numerical values (claim 1, claim 2, claim 3, ...), characterized in that by multiplying the said parameter maximum value (L) is the process of determining the parameters (gain G).
According to a fifth aspect of the present invention, there is provided a musical tone signal generator for executing the musical tone signal control method according to any one of the first to fourth aspects.
According to a sixth aspect of the present invention, there is provided a program for causing a processing device to execute the musical tone signal control method according to any of the first to fourth aspects.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
1. Configuration of One Embodiment of the Present Invention FIG. 2 shows an overall configuration diagram of an electronic musical instrument using the musical tone signal control method according to one embodiment of the present invention.
Reference numeral 100 denotes a sound source unit that generates a musical sound signal. A sound system 200 includes a power amplifier, a speaker, and the like. A hard disk 300 stores various programs, data, and the like. Reference numeral 500 denotes a display, which is composed of LEDs and the like, and displays various information. A panel switch 600 includes a switch, a volume operator, and the like. Reference numeral 700 denotes a MIDI interface, which transmits MIDI information. The MIDI information includes parameters for controlling musical tone information, and is set with a level value, a control value, and the like. Reference numeral 800 denotes a performance operator that uses a keyboard or the like to generate a note-on / note-off signal. Reference numeral 900 denotes a timer, which generates a timing for generating a musical sound. Reference numeral 1000 denotes a CPU, which controls each component. Reference numeral 1100 denotes a ROM that stores a program for controlling the CPU 1000. A RAM 1200 temporarily stores processing data obtained by the CPU 1000, and is used as a register, a flag, a table, or the like. Reference numeral 1300 denotes a bus line to which the above-described units are connected.
[0006]
Here, the internal configuration of the sound source unit 100 will be described with reference to FIG.
Reference numeral 110 denotes a waveform generator, which generates a digital output tone signal under the control of the CPU 1000. Reference numerals 121 to 123 denote multipliers that multiply an input signal input from the waveform generation unit 110 and a multiplier signal described later. The waveform generation unit 110 and the multipliers 121, 122, and 123 constitute a sound generation channel unit 115. In addition, a plurality of sound generation channel units 115 are provided, and a plurality of channels of tone signals can be generated simultaneously. Reference numerals 151 to 153 denote digital mixers that mix a plurality of input signals. A converter 130 includes an Lch reproducing unit 131 and an Rch reproducing unit 132. Those reproducing units are constituted by D / A converters, and convert the digital signals from the digital mixers 152 and 153 into analog signals. Reference numeral 140 denotes an effector that performs various effect processing on the output signal of the digital mixer 151. Reference numerals 124 and 125 denote multipliers that multiply the output signal from the effector 140 and the multiplication signal.
[0007]
Further, in the above multiplier, a signal obtained by multiplying the input signal by the multiplier signal is output. The concept of the output signal generation processing will be described with reference to FIG. The signal input source 170 is connected to the signal output destination 180 via the multiplier 120. Here, when the multiplier 120 is the multiplier 121 to 123 used in the sound generation channel unit 115, the signal input source 170 is the waveform generation unit 110, and the output destination is the digital mixer 151 to 153. In the case of the multipliers 124 and 125 used in the effector 140, the input source is the digital mixer 151 connected to the sound generation channel unit 115, and the output destinations are the digital mixers 152 and 153. An effective sound volume calculation unit 160 has a function for calculating a multiplier signal to the multiplier 120, and is realized by a program operating in the CPU 1000.
[0008]
2. Operation of this Embodiment Hereinafter, the operation of this embodiment will be described with reference to FIG. 1 and FIG.
In FIG. 1, when a note-on signal is sent from the performance operator 800 or the MIDI interface 700, a tone signal is generated in the tone generator 100 according to a command from the CPU 1000. It should be noted that a parameter such as volume is set by a signal from the panel switch 600 or the MIDI interface 700. In the plurality of sound generation channel units 115, 115,... Inside the sound source unit 100 shown in FIG. 2, the tone signal designated by the CPU 1000 is digitally generated by the waveform generation unit 110. Then, after being input to the multipliers 121 to 123, they are multiplied by a multiplication signal to be described later and used as output signals in the sound generation channel units 115, 115,. The musical tone signals generated by the plurality of sound generation channel units 115 are mixed by the digital mixers 151 to 153 and input to the effector 140 or the converter 130. The signal input to the effector 140 is input to the multipliers 124 and 125 and then mixed by the digital mixers 152 and 153. Further, the digital signal input to the converter 130 is converted into an analog signal.
[0009]
Here, the multiplication signal supplied to the multiplier 120 is determined by the effective sound volume calculation unit 160 by the level value L, the operation amount C of the controller, and the sensitivity value S. Further, there may be a plurality of controllers such as a channel after touch, a wheel controller, and a breath controller for each performance part. In this case, controller values (C1, C2, C3,...) And sensitivity values (S1, S2, etc.) S3, ...) is input. Here, in the case of the sounding channel unit 115, the level value is the level value set in the timbre data of the part to which the note-on assigned to the sounding channel belongs, and the sensitivity value S is the sensitivity set in the timbre data. Value. In the case of the effector 140, the level value is the output level value set for the effector, and the sensitivity value S is the sensitivity value set for the effector.
[0010]
When large values are set for the level value L and the sensitivity value S, the effective volume is not saturated even if the controller value is increased, and the maximum effective volume is set at the maximum value of the controller value. The effective volume G is calculated by the following formula.
(1) The calculation formula for obtaining the effective sound volume G when the number of controllers is one is as follows.
(Equation 2)
Effective volume G = level value L (1−sensitivity value S + sensitivity value S × operation amount C / Cmax of the controller)
(However, 0% ≦ S ≦ 100%)
Effective volume G = level value L (1 + sensitivity value S × controller operation amount C / Cmax)
(However, -100% ≦ S <0%)
[0011]
(2) When there are a plurality of controllers The calculation formula for obtaining the effective volume G is as follows.
(Equation 3)
Effective volume G = level value L × {term 1} × {term 2} × {term 3} ×.
Term 1 = (1−S1 + S1 × C1 / C1max)
(However, 0% ≦ S1 ≦ 100%)
Term 1 = (1 + S1 × C1 / C1max)
(However, -100% ≦ S1 <0%)
Term 2 = (1−S2 + S2 × C2 / C2max)
(However, 0% ≦ S2 ≦ 100%)
Term 2 = (1 + S2 × C2 / C2max)
(However, -100% ≦ S2 <0%)
…………
[0012]
Specifically, since it is set using 8-bit or 7-bit parameter data instead of the sensitivity value S of -100% to 100%, the following calculation formula is used. (1) When there is one controller (Equation 4)
G = L × (128−S × 2 + C × S / 64) / 128 (S ≧ 0)
G = L × (128−C × S / 64) / 128 (S <0)
Here, 0 ≦ G ≦ 255, 0 ≦ L ≦ 255, 0 ≦ C ≦ 127, −64 ≦ S ≦ 64
(That is, G and L are 8 bits each, and C and S are 7 bits each.)
It is. FIG. 3 shows a G value when the value of C is varied using the value of S as a parameter. It can be seen that the value of L is set to the maximum value in the range of 0 ≦ C ≦ 127 and −64 ≦ S ≦ 64, and is limited in a decreasing direction.
[0013]
(2) When there are multiple controllers (Equation 5)
G = L × {term 1} × {term 2} × {term 3} ×.
Term 1 = (128−S1 × 2 + S1 × C1 / 64) / 128 (S1 ≧ 0) Term 1 = (128−S1 × C1 / 64) / 128 (S1 <0) Term 2 = (128−S2 × 2 + S2 ×) C2 / 64) / 128 (S2 ≧ 0) term 2 = (128−S2 × C2 / 64) / 128 (S2 <0)
…………
(However, the number of bits of each data is the same as in (1).)
[0014]
3. Modifications The present invention is not limited to the above-described embodiments. For example, the following various modifications are possible and all fall within the scope of the present invention.
(1) In the above-described embodiment, a linear calculation formula is used to determine the effective sound volume.
(2) Although applied to the volume parameter in the above embodiment, the present invention can be applied to filter coefficients, vibrato speed and depth, compressor threshold and rate, and the like.
(3) In the above embodiment, the function of the effective sound volume calculation unit 160 is realized by a program stored in the ROM 1100 in the electronic musical instrument. However, for example, a similar function is realized by an application program running on a personal computer. Can do. Only this application program may be stored in a storage medium such as a CD-ROM or a flow disk and distributed, or distributed through a transmission path.
(4) The number of bits of each data in the above embodiment is an example, and is appropriately changed according to hardware. Although the maximum value of the effective sound volume G is limited to 255 by the number of bits (8 bits), it is not necessarily limited by the number of bits. For example, a value that is not directly related to the number of bits such as 200 can be set as the maximum value.
[0015]
【The invention's effect】
As described above, according to the present invention, the value of the parameter is controlled so that the value of the parameter changes within the range from the minimum value of the parameter to the reference value by any operation of the operator. Therefore, the controller can be operated in a very natural state.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an electronic musical instrument using a musical tone signal control method according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram of the structure of a sound source unit and volume control using a musical tone signal control method according to an embodiment of the present invention.
FIG. 3 is a diagram showing a value of G when there is one controller.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100 ... Sound source part, 110 ... Waveform generator, 120, 121, 122, 123, 124, 125 ... Multiplier, 130 ... Converter, 131 ... Lch reproducing part, 132 ... Rch reproducing part, 140 ... Effector, 151, 152, 153 ... Digital mixer, 160 ... Effective volume calculation unit, 170 ... Signal input source, 180 ... Signal output source, 200 ... Sound system, 300 ... Hard disk, 500 ... Display, 600 ... Panel SW, 700 ... MIDI interface, 800 ... Performance operator, 900 ... timer, 1000 ... CPU, 1100 ... ROM, 1200 ... RAM, 1300 ... bus line

Claims (6)

A musical sound signal control method executed in a processing device of a musical sound control device that controls a musical sound signal by specifying a parameter and changes the value of the parameter according to an operation amount of an operator,
A parameter maximum value setting process in which the processing device presets in a storage device a parameter maximum value that is the maximum value of the parameter ;
The processing apparatus sets a sensitivity value that determines a parameter minimum value within a variation range that is a minimum value of the parameter within a variation range of the operation amount and a gradient of the change in the parameter with respect to a change in the operation amount as the parameter maximum value . A sensitivity value setting process that is set independently in the storage device;
A musical sound signal control method, comprising : a parameter determination step in which the processing device determines a parameter to be given to the musical sound signal based on the maximum parameter value , the sensitivity value, and the operation amount. In the parameter determination process, when the sensitivity value is set to a sensitivity maximum value that is a maximum value of the sensitivity value, and the operation amount is set to a minimum operation amount that is a minimum value of the operation amount , the parameter maximum value 2. The musical tone signal control method according to claim 1, wherein the parameter is determined so that the parameter becomes a parameter minimum value which is a minimum value of the parameter regardless of the value of the parameter . The sensitivity value setting process is a process of setting the sensitivity value to one of a negative value, zero, and a positive value,
The parameter is determined so as to be the maximum value of the parameter regardless of the operation amount when the sensitivity value is set to zero in the sensitivity value setting process. 2. A musical sound signal control method according to 1. The musical sound control device has a plurality of the operating elements,
The sensitivity value setting process sets a plurality of sensitivity values respectively corresponding to the plurality of operators.
The parameter determination process calculates a plurality of numerical values respectively corresponding to the respective operating elements based on the operation amount of the respective operating elements and the corresponding sensitivity values, and multiplies these numerical values by the parameter maximum value. The musical sound signal control method according to claim 1, wherein the parameter determination process is performed.   5. A musical tone signal generating apparatus that executes the musical tone signal control method according to claim 1.   A program for causing a processing device to execute the musical tone signal control method according to any one of claims 1 to 4.

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