JP3250733B2 - Music signal generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a parameter setting device for setting parameters in an electronic keyboard instrument.

[Prior art]

Conventionally, a device disclosed in Japanese Utility Model Laid-Open Publication No. 61-185097 is known as this type of device. In this device, the parameters for tuning are set by operating the keyboard.Specifically, the parameters are set so as to increase the pitch when a key on the high note side on the keyboard is pressed,
The parameter is set so that the pitch is lowered when the key on the low tone side is pressed.

[Problems to be solved by the invention]

In the above-described conventional device, it is possible to set stepwise parameters according to the arrangement of keys on the keyboard,
The parameters set for each key had to be discrete and could not be finely adjusted. SUMMARY OF THE INVENTION The present invention provides a parameter setting device for an electronic keyboard instrument that can set discrete but rough parameters using a keyboard and can also make fine adjustments in order to address the above problem. The purpose is to:

[Means for Solving the Problems]

In order to achieve the above object, the configuration of the present invention is characterized in that a plurality of first performance operators for discretely controlling the characteristics of generated tone signals and a plurality of first performance operators are operated by operating the first performance operators. Signal, comprising a performance operator for continuously interpolating the characteristics of the tone signal, which is controlled in a controlled manner, and a second performance operator which continuously changes by operation and outputs a signal representing an operation position. In the generator, a first mode in which the first and second performance operators are used for performance and a second mode in which the first and second performance operators are used to set parameters for controlling tone signals are selectively selected. A mode switching unit for switching, and when the second mode is selected by the mode switching unit, the mode is assigned to each of the first performance operators in response to an operation of one of the plurality of first performance operators. Being discrete A first parameter setting means for setting, as a first parameter, a parameter assigned to the first performance operation element operated in the same manner among a plurality of parameters, and a second mode selected by the mode switching means. On condition that the first performance operator is being operated, a second parameter as a continuous amount for interpolating between discrete parameters set by the first parameter setting means is set in the second performance operation. A second parameter setting means for setting according to the operation position of the child; and a condition that the first performance operation element is being operated when the second mode is selected by the mode switching means.
A continuous amount for controlling a tone signal by interpolating a discrete first parameter set by operating the first performance operator with a continuous second parameter set by operating the second performance operator. And a parameter interpolating means for storing as a parameter. In this case, for example, the plurality of first performance operators are constituted by a plurality of keys on a keyboard, and the second performance operators are constituted by pitch bend operators.

Actions and effects of the present invention

In the present invention configured as described above, when the first mode is selected by the mode switching means, the characteristics of the tone signal generated by operating the first performance operator (for example, a plurality of keys on the keyboard) ( For example, the pitch) is discretely controlled, and the characteristic (eg, pitch) of the discretely controlled tone signal is continuously controlled by operating a second performance operator (eg, pitch bend operator). You. When one of the first operation operators is operated when the second mode is selected by the mode switching unit, the first parameter setting unit is assigned to each of the first performance operators. Among the plurality of discrete parameters, the parameter assigned to the operated first performance operator is set as the first parameter. Further, the second parameter setting means sets a continuous amount for interpolating between discrete parameters set by the first parameter setting means on condition that the first performance operation element is being operated. The second parameter is set according to the operation position of the second performance operator. The parameter interpolation means sets the discrete first parameters set by operating the first performance operator by operating the second performance operator, on condition that the first performance operator is being operated. It is stored as a continuous amount parameter for controlling the tone signal by interpolating with the obtained continuous second parameter. Therefore, a rough parameter value can be specified by operating the first performance operator, and the rough parameter value can be finely adjusted by the second performance operator. As a result, it is possible to visually specify discrete parameter values with the first performance operator, which facilitates operability, and fine adjustment of parameter values can be performed with the second performance operator. The operability can be improved by preventing the values from becoming discrete.

【Example】

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First
FIG. 1 schematically shows the appearance of an electronic musical instrument provided with a parameter setting device according to the present invention, and FIG. 2 shows the overall schematic configuration of the electronic musical instrument. The electronic musical instrument generates a musical sound by a formant sound synthesis method, and uses the parameter setting device for setting parameters in the formant sound synthesis. In this electronic musical instrument, generation of musical tones is controlled under the control of a control unit 20 connected to the bus 10, and the CPU 21 of the control unit 20 executes a program stored in the ROM 22, The RAM 23 is used to store and read various state variables and various variables. A keyboard 30 and an operation panel 40 are connected to the bus 10, and a CPU 21
Detects the operation status of the keyboard unit 30 and the operation panel 40 via the bus 10, and sends a control signal in accordance with the detected operation to the tone generator circuit.
Output to 60. As a result, the tone generator 60 generates a tone signal according to the operating condition, and the sound system 70 connected to the tone generator 60 and configured with an amplifier or the like causes the speaker 80 to generate a tone corresponding to the tone signal. As shown in FIG. 3, the keyboard unit 30 includes a keyboard 31 composed of movable parts of each key, a switch circuit 32 opened and closed by the movable part 31, and an open / close data of the switch circuit 32 on a bus. And an interface 33. The switch circuit 32 is closed when each key is pressed, and its output voltage is changed from "0" volts to "+ V" volts. The interface 33 detects that each key is pressed by the change of the same voltage. Then, the CPU 21 detects the operation status of each key via the interface 33. The operation panel 40 has an operator group 41 provided on a panel on the upper surface of the main body as shown in FIGS. 1 and 4, and specifically, a mode switching operator 41a and a parameter selection operation. Elements 41b to 41e and other operation elements 41f, a pitch bend wheel 41g, a modulation wheel 41h, and the like are provided. These operator groups 41 are connected to a switch circuit or the like in an electric circuit 42, and the output of the electric circuit 42 is connected to an interface 43. The mode switching operator 41a in the operator group 41 is the keyboard unit 30.
This is an operator that switches the content represented by the operation in, when in the on state, the normal performance mode is entered, and the keyboard operation represents the performance. .
The switch to which the mode switching operator 41a is connected is set to "+ V" volt in the on state and to "0" volt in the off state. Also, parameter selection operator
Reference numerals 41b to 41e denote operators for selecting the setting target of the formant parameter in the formant setting mode. The switches to which the parameter selection operators 41b to 41e are connected are four switches.
Only one of the ones is turned on and the "+
V "volts, and the remaining three are in the off state to" 0 "volts. On the other hand, the pitch bend wheel 41g has an A / D conversion circuit 42b.
And its output varies within a range of "0" to "+ V" volts around "+ 0.5V". Also, the modulation wheel 41
h has a normal volume connected to the A / D conversion circuit 42c, and its output can be set to any value within the range of "0" to "+ V" volts. The CPU 21 detects these operations on the keyboard unit 30 and the operation panel 40, sets various parameters stored in the RAM 23, and displays the corresponding parameters in the display.
Control the display at 90. Next, the operation of the present embodiment configured as described above will be described. The performer first sets the formant parameters,
The performance will then begin. This electronic musical instrument is the fifth
As shown in the figure, the respective center frequencies and levels in the four power spectrum peaks (hereinafter, referred to as first to fourth formants) can be set as formant parameters. FIG. 5 shows a power spectrum, in which the horizontal axis represents frequency and the vertical axis represents its level. When the player turns on a power switch (not shown), the CP
U21 starts executing the program stored in the ROM 22, controls the tone generation according to the performance operation on the keyboard 30, and detects the operation status on the operation panel 40,
A parameter setting process is performed according to the operation. When executing the above program, the CPU 21 performs an initial setting process such as clearing a variable in step 100 of the main routine shown in FIG. 6, and sets a formant in step 200 according to the operation state of the mode switching operator 41a. It is determined whether to execute the processing or the normal performance processing. When the player turns off the mode switching operator 41a to enter the formant setting processing mode, the determination in step 200 becomes "NO", and the CPU 21 executes the formant setting processing. In this formant setting process, as shown in FIG. 7, in step 310, it is determined whether or not a key is pressed on the keyboard 30. If the key is pressed, it is determined that the key is being turned on, and step 320 and subsequent steps are performed. If none of the keys are depressed, it is determined that the key is not turned on, and the formant setting process is terminated. The CPU 21 determines whether or not a key has been pressed by inputting operation status data of the keyboard 31 from the interface 33 of the keyboard unit 30 via the bus 10. In the formant setting process, the center frequency of the first to fourth formants is set by the keyboard 31 and the pitch bend wheel 41a, and the level of the formants is set by the modulation wheel 41b. That is, the horizontal axis of the power spectrum shown in FIG. 5 is regarded as the highest note key from the lowest note key of the keyboard 31, and any key on the keyboard 31 is pressed to designate the center frequency of each formant.
At this time, since the keyboard 31 alone becomes discrete, the pitch bend wheel 41a is rotated for fine adjustment. In addition, the formant level is designated by operating the modulation wheel 41b before determining the center frequency. Further, the formant for which the parameter is set is the parameter selection operator 41c.
It is determined by turning on any one of .about.41f. The CPU 21 proceeds to step 310 in the formant setting process.
When it is determined that the key is on, the central frequency fp1 of the formant represented by the key code KC is derived in step 320 based on the key code KC obtained via the interface 33 of the keyboard unit 30, At step 330, A /
The output state of the D conversion circuit 42b is input, and a fine adjustment frequency fp2 corresponding to the pitch bend PB, which is the operation amount of the pitch bend wheel 41g, is derived from the output. Any frequency fp
When obtaining 1, fp2, a conversion table may be used or a calculation formula may be used. In this embodiment, RO
M23 has key code and center frequency conversion table,
The center frequency fp1 is read from the key code KC of the depressed key. After obtaining the frequencies fp1 and fp2, the CPU 21
At 340, the A / D conversion circuit 42 via the interface 43
The output state of c is input, and a formant level fl corresponding to a modulation level ML, which is an operation amount of the modulation wheel 41h, is derived from the output. In step 350, the CPU 21 detects which of the parameter selection operators 41b to 41e is on via the interface 43, and as a formant parameter corresponding to the on operator,
(Fp1 + fp2) for center frequency and fl for formant level
Is written in a predetermined storage area in the RAM 23 in order to set the value. If the performer has turned on the parameter performance operator 41b, the second form is used as the formant parameter of the first formant if the selection operator 41c is on.
As the formant parameter of the formant, if the selection operator 41d is turned on, it is set as the formant parameter of the third formant, and if the selection operator 41e is turned on, it is set as the formant parameter of the fourth formant. After the writing is completed, the CPU 21 displays the written parameters on the display 90 in step 360. Thereafter, it is determined again in step 310 whether or not the key is on, and if the key is on, the above-described processing is repeated. When the key is turned off, the determination is “NO”, and the formant setting process ends. Therefore, the value immediately before the key-off is set as the formant parameter. When the player turns on the parameter selection operators 41b to 41e and sets the formant parameters as described above, the player turns off the mode switching operator 41a and starts playing on the keyboard 31. The CPU 21 determines the operation status of the mode switching operator 41a in step 200, and determines that the mode switching operator 41a is turned on in the same determination, and executes a normal performance process in step 400. In this normal performance process, the CPU 21 detects the performance operation status of the keyboard 31 via the interface 33 of the keyboard unit 30, and generates a key code signal KC representing a key pressed corresponding to the detected performance operation and a key press signal KC. The key-on signal KON indicating the state is output to the tone generator 60. In addition, the operation state of each operation element is detected via the interface 43 of the operation panel 40, and a predetermined parameter signal indicating tone color selection or the like is output to the tone generator circuit 60 in accordance with the detected operation. As a result, the tone generator circuit 60 generates a tone signal corresponding to each operation situation, and outputs the tone signal to the speaker
A tone corresponding to the tone signal is generated. In the above embodiment, the keyboard is regarded as the frequency axis, but it is also possible to set other parameters of the continuous amount. For example, the present invention can be applied to a case where a sound volume is set or a mixing ratio when a plurality of sounds are synthesized. Further, in the above-described embodiment, the formant synthesized sound source has been described. However, a configuration in which a modulation depth and a modulation frequency, which are parameters of each operator in frequency modulation synthesis, may be set. Further, in the above embodiment, the present invention is implemented by software, but may be configured by a microprogram or hardware. In addition, although the modulation wheel is used for setting the formant level, the level can be set by a key pressing speed (initial touch data) or a key pressing pressure (after touch data).

[Brief description of the drawings]

FIG. 1 is an external view of an electronic musical instrument according to an embodiment of the present invention,
2 is a schematic configuration diagram of the electronic musical instrument, FIG. 3 is a detailed configuration diagram of a keyboard, FIG. 4 is a detailed configuration diagram of an operation panel, and FIG.
FIG. 6 is a power spectrum diagram showing formant parameter targets, FIG. 6 is a flowchart corresponding to a main routine of control, and FIG. 7 is a flowchart corresponding to a formant setting process. Description of symbols 10: bus, 20: control unit, 21: CPU, 22: ROM, 23
… RAM, 30… keyboard part, 31… keyboard, 32… switch circuit, 40… operation panel, 41a… mode switching operator, 4
1b to 41e: Parameter selection operator, 41g: Pitch bend wheel, 41h: Modulation wheel.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-182798 (JP, A) JP-A-2-74997 (JP, A) JP-A-1-293395 (JP, A) JP-A 61-182 15198 (JP, A) JP-A-63-137296 (JP, A) JP-A-63-86698 (JP, U) JP-A-60-78095 (JP, U) JP-A-61-185097 (JP, U) Japanese Utility Model Showa 58-81589 (JP, U)

Claims (2)

(57) [Claims] A plurality of first performance operators for discretely controlling the characteristics of generated tone signals, and the characteristics of the tone signals discretely controlled by operating the first performance operators are continuously converted. A second performance operator for continuously interpolating and outputting a signal representing an operation position, wherein the first and second performance operations are performed. Mode switching means for selectively switching between a first mode in which a child is used for performance and a second mode in which the first and second performance operators are used for setting parameters for controlling tone signals. When the two modes are selected, in response to an operation of one of the plurality of first performance operators, the user selects one of the plurality of discrete parameters assigned to each of the first performance operators. Same operation First parameter setting means for setting a parameter assigned to the first performance operator as a first parameter; and when the second mode is selected by the mode switching means, the first performance operator is operating. On the condition that there is, a second parameter as a continuous amount for interpolating between discrete parameters set by the first parameter setting means is set according to the operation position of the second performance operator. When the second mode is selected by the two-parameter setting means and the mode switching means, the discrete setting set by the operation of the first performance operator is provided on condition that the first performance operator is being operated. Of a continuous amount for controlling a musical tone signal by interpolating a typical first parameter with a continuous second parameter set by operating the second performance operator. Musical tone signal generating apparatus characterized by comprising a parameter interpolation means for storing the parameters. 2. The tone signal generating apparatus according to claim 1, wherein said plurality of first performance operators are constituted by a plurality of keys of a keyboard, and said second performance operators are constituted by pitch bend operators.