JP4893666B2 - Parameter setting device and program - Google Patents

Description

  The present invention relates to a parameter setting device for setting parameter values used for acoustic signal processing, and a program for causing a computer to function as such a parameter setting device.

2. Description of the Related Art Conventionally, acoustic signal processing apparatuses that perform acoustic signal processing according to various parameter values are known. For example, the synthesizer described in Non-Patent Document 1 is an example.
In such an acoustic signal processing device, the user can specify the values of various parameters and control the contents of the acoustic signal processing to be executed by the device.
"MUSIC PRODUCTION SYNTHESIZER MOTIF XS6 MOTIF XS7 MOTIF XS8 Instruction Manual", Yamaha Corporation, 2007 (particularly, p. 73)

However, in the conventional acoustic signal processing apparatus, as described in Non-Patent Document 1, for each parameter that can be set, the parameter value is displayed and a setting operation from the user is accepted.
However, if all parameter values are displayed on the screen and individual setting operations are accepted, it is difficult to understand the correspondence between the operators and parameters, and it is necessary to prepare many operators. For this reason, as the functions increase and the types of parameters to be edited increase, it is difficult to quickly find and edit the desired parameters.

Further, as the parameters are subdivided, it is necessary to change the values of a plurality of parameters at the same time in order to obtain a desired effect. In this respect as well, setting parameter values has been a difficult operation for beginners.
The present invention has been made based on such a situation, and an object thereof is to make it possible to easily set the value of a parameter even when the number of parameters used for acoustic signal processing is large. To do.

In order to achieve the above object, the present invention provides a parameter setting device for setting a plurality of parameter values used for acoustic signal processing, a parameter memory for storing a plurality of sets of the plurality of parameter values, and the acoustic signal. A current memory for storing the values of the plurality of parameters used for processing and a set of the values of the plurality of parameters read from the parameter memory according to a user operation, and the values are set as initial values of the parameters. The initial value setting means, the offset setting means for setting a common offset value for the plurality of parameters, and the initial value for each of the plurality of parameters are changed by the offset value in accordance with a user operation. Value is stored in the current memory as a parameter value used for the acoustic signal processing. It is provided with a means for.
Moreover, the program of this invention is a program for functioning a computer as said parameter setting apparatus.

According to the parameter setting device of the present invention as described above, even when the number of parameters used for the acoustic signal processing is large, the parameter values can be easily set.
Moreover, according to the program of this invention, a computer can be functioned as a parameter setting apparatus as described above, and a similar effect can be obtained.

Hereinafter, the best mode for carrying out the present invention will be specifically described with reference to the drawings.
First, FIG. 1 shows a hardware configuration of an acoustic signal processing device including an embodiment of a parameter setting device of the present invention.
As shown in FIG. 1, the acoustic signal processing device 10 includes a CPU 11, a flash memory 12, a RAM 13, a detection circuit 14, a display circuit 15, a waveform input / output unit (I / O) 16, and a signal processing unit (DSP) 17. These are connected by a system bus 18. In addition, an operator 21 connected to the detection circuit 14 and a display 22 connected to the display circuit 15 are provided.

Then, the CPU 11 executes an appropriate program stored in the flash memory 12, thereby detecting the operation of the operation element 21 by the detection circuit 14, displaying the display 22 by the display circuit 15, and an acoustic signal by the waveform I / O 16. Input / output and signal processing by the DSP 17 are controlled.
The flash memory 12 is a rewritable nonvolatile storage unit that stores a control program executed by the CPU 11 and preset data described later.

The RAM 13 is storage means for storing current data, which will be described later, and used as a work memory for the CPU 11.
The operation element 21 is constituted by a key, a switch, a rotary encoder, and the like, and is an operation element for the user to operate the acoustic signal processing apparatus 10 to edit a parameter value. The detection circuit 14 is a circuit for detecting the operation and transmitting it to the CPU 11.

  The display 22 is a display means configured by a liquid crystal display (LCD) or the like. Then, a screen showing the current state of the acoustic signal processing device 10, a GUI (graphical user interface) for accepting an editing operation of parameter values, and the like are displayed. The display circuit 15 is a circuit for controlling the display contents based on an instruction from the CPU 11.

The waveform I / O 16 is an interface for accepting input of an acoustic signal to be processed by the DSP 17 and outputting the processed acoustic signal. Either a digital input / output interface or an analog input / output interface including an A / D conversion unit or a D / A conversion unit may be provided.
The DSP 17 performs signal processing on the acoustic signal (digital audio waveform data) input from the waveform I / O 16 based on the value of a parameter set in a predetermined register by the CPU 11 based on the contents of the current memory, and generates a waveform. It is a signal processing unit that outputs to the I / O 16.

Next, a parameter value setting method in the acoustic signal processing apparatus 10 will be described.
Here, in the signal processing performed by the DSP 17, an explanation will be given by taking as an example the setting of threshold parameter values, ratio parameters, and gain parameters used for gain adjustment by a multiband compressor. . In the following description, the description is omitted except for the contents related to these parameters.

The multiband compressor is a signal processing function that adjusts the gain of an input signal according to a characteristic curve defined by threshold, ratio, and gain parameter values for the three bands of LOW, MID, and HIGH with respect to the input signal. .
The acoustic signal processing apparatus 10 stores a plurality of sets of these parameter values as preset data. Then, it can be read in accordance with a user instruction and stored in the current memory as current data reflected in the signal processing.

FIG. 2 shows an example of preset data.
As shown in the figure, for each preset (six types here), nine parameter values of three bands × three types are prepared. This preset is basically prepared in advance by the manufacturer of the apparatus, but it does not prevent the user from changing or adding the preset. In addition, the value of each parameter in one preset can be freely determined within a predetermined change range independently of each other.
Such preset data can be stored in the flash memory 12 functioning as a parameter memory.

FIG. 3 shows an example of current data.
As shown in this figure, in the acoustic signal processing apparatus 10, three values of a reference value, an offset value, and a current value are prepared as current data.
Among these, the reference value is a value that is read and stored as a preset value shown in FIG. 2 and used as a reference for parameter value setting. The current value is a parameter value that is actually reflected in the contents of signal processing.

  The offset value is a value that is set according to the user's operation and defines how much the current value is changed from the reference value. Here, the current value is determined by reference value + offset value.

  The offset value is prepared for each of the threshold, the ratio, and the gain, but a common value is used for each of LOW, MID, and HIGH. That is, for example, the threshold offset value “+10” is commonly used to calculate the threshold values of LOW, MID, and HIGH. The same applies to the ratio and gain.

  The same type of parameters for different bands are related to each other, and the values are usually changed while maintaining the mutual magnitude relationship. Therefore, even if a common offset value is used in this way, Settings that generally meet the user's wishes are possible. If you want to change the magnitude relationship, you can respond by selecting another preset.

Next, FIG. 4 shows a display example of a screen for accepting setting of the parameter values shown in FIG.
A parameter setting screen 100 shown in FIG. 4 is a GUI to be displayed on the display device 22, and is a screen that accepts the setting of each parameter value shown in FIG.
In the parameter setting screen 100, the parameter value itself is not displayed. However, the parameter setting screen 100 accepts the setting of the threshold, ratio, and gain parameter values for each of the three bands LOW, MID, and HIGH. is there.

The parameter setting screen 100 includes a preset selection unit 101, knobs 102 to 104 for setting the offset values of each parameter, display units 105 to 107 for displaying the offset values, and a graph 108 indicating the current processing status. 109 are provided.
Of these, the preset selection unit 101 displays the currently selected preset, and the user can select a preset by using a button (not shown) provided outside the display 22 at a position corresponding to the preset selection unit 101. Selection can be made.

Further, the user can increase / decrease the offset value of each parameter with a rotary knob (not shown) provided outside the display device 22 at a position corresponding to the knobs 102 to 104. The offset value set as a result is displayed by the direction of the knobs 102 to 104 and the numbers on the display units 105 to 107.
In the parameter setting screen 100, the parameter value itself cannot be directly operated, and the value itself is not displayed. Although it is not hindered to display the values of all the parameters, this configuration is taken into consideration for easy viewing.

Each of the graphs 108 and 109 is a display unit that displays the gain attenuation amount and the output level by the multiband compressor in real time. This display is performed based on the level of the entire signal without considering the band.
Only the offset value of the current data shown in FIG. 3 can be set directly on the parameter setting screen 100 described above. However, the user selects the preset and sets the reference value, and then edits the three offset values, so that the nine parameter values shown in FIG. Can be set to

Next, FIG. 5 shows the relationship between the offset value of each parameter and the current value.
Here, since the current value is determined by the reference value + offset value as described above, the relationship between the offset value and the current value of each band is indicated by a solid line 31, a chain line 32, and a broken line 33 in FIG. The street becomes straight. The current value when the offset value is 0 is the reference value. The difference in the behavior of the current value with respect to the offset value in the solid line 31, the alternate long and short dash line 32, and the broken line 33 is due to the difference in the reference value depending on the band.

Each parameter has a permissible change range, and when the calculation result of the current value deviates from this, the value is rounded to the upper limit or the lower limit of the change range.
Here, an allowable change range is also defined for the offset value. The permissible range is set such that one of the three bands is defined as a reference band, and the current value of the reference band falls within the parameter value change range. In the example of the figure, the solid line 31 indicates the behavior of the current value in the reference band, and the allowable change range of the offset value is determined corresponding to the behavior of the current value indicated by the solid line 31. Note that which band of LOW, MID, and HIGH is set as the reference band may be fixed, but may be arbitrarily determined by the user.

Next, processing executed by the CPU 11 for setting the parameter value using the offset value described above will be described.
First, FIG. 6 shows a flowchart of processing when there is a preset selection operation.
When the CPU 11 detects an operation for selecting a preset, the CPU 11 starts the process shown in the flowchart of FIG.

  First, the parameter value of the selected preset is acquired from the preset data shown in FIG. 2 (S11), and the value is stored in the current memory as a reference value for each parameter (S12). Thereafter, the offset value is returned to the initial value (S13). Here, the initial value is “0”.

  Then, the current value of each parameter is recalculated based on the reference value and the offset value determined in steps S12 and S13 (S14), and a register value for causing signal processing according to the current value of each parameter is performed. The appropriate register of the DSP 17 is set (S15), and the process is terminated.

Through the above processing, the contents of the preset selected by the user can be reflected in the signal processing in the DSP 17.
At this time, it is not essential to return the offset value to the initial value. However, in consideration of the fact that the change range of the offset value differs depending on the initial value of the parameter and that the content is reflected in the signal processing as it is when the preset is read, the value is returned to the initial value.

  The reason why the parameter value is not set as it is in step S15 is that there are cases where parameters other than those set on the parameter setting screen 100 need to be taken into account in the signal processing contents. For example, in addition to the gain for each band, a gain common to three bands can be set, and the sum of the gain value for each band and the common gain value is used as the actual gain value for each band for signal processing. For example, when reflecting.

Next, FIG. 7 shows a flowchart of processing when there is an operation for changing the offset value.
When the CPU 11 detects an operation for changing any of the offset values, the CPU 11 starts the processing shown in the flowchart of FIG.
First, the offset value is changed according to the detected operation amount (S21), and the current value of the parameter of the reference band is recalculated (S22). The formula used for the recalculation is the same as in step S14 of FIG. Further, the recalculation may be performed only for the type of parameter whose offset value is changed. The same applies to the subsequent processing.

  If the current value after recalculation is within the allowable change range of the parameter (S23), the offset value is also within the allowable change range, so that signal processing corresponding to the current value of the recalculated parameter is performed. The register value is set in an appropriate register of the DSP 17 (S25). This process has the same purpose as step S15 in FIG.

  If the offset value is not within the allowable change range in step S23, the offset value is not within the allowable change range. Therefore, the offset value is reset to a value such that the current value becomes the upper limit or lower limit of the allowable change range (S24). The process is repeated from step S22. In the next process, the answer is YES in step S23, and the process should proceed to step S25.

  After step S25, one of the bands other than the reference band is set as a processing target (S26), and the current values of the parameters of the processing target band are recalculated (S27). If this is not within the allowable change range of the parameter (S28), the current value is set to the upper limit or lower limit of the allowable change range (S29). Except for the reference band, it is not necessary to review the offset value, and the current value may be simply rounded to the upper limit or lower limit.

After step S28 or S29, a register value for performing signal processing corresponding to the recalculated parameter current value is set in an appropriate register of the DSP 17 (S30).
If there is a band that is not yet processed (S31), the next band is processed (S32), and the process is repeated from step S27. Then, after performing the above processing for all bands as processing targets, the processing ends.

  Through the above processing, a common offset value can be set for the parameters of each band in accordance with the user's operation, and a current value corresponding to the offset value can be set for the parameters of each band. Therefore, the user can set the values of three parameters that are related to each other only by setting the value of one parameter. As a result, even when there are a large number of parameters to be set, the setting can be performed with an operation that is efficient and easy for beginners to understand.

This is the end of the description of this embodiment, but it goes without saying that the configuration of the apparatus, the configuration of the screen, the configuration of data, the specific processing content, the operation method, and the like are not limited to those described in the above embodiment. is there.
For example, in the above-described embodiment, the allowable change range of the offset value is determined based on the change range of the parameter of the reference band, but from the value at which the current value of all the bands becomes the lower limit value of the parameter, The allowable change range of the offset value may be a value up to a value that becomes the upper limit value of the parameter.

  Further, the allowable change range of the offset value may be a fixed range that depends only on the type of parameter. In this case, it is not necessary to treat the reference band differently from other bands. Even in this case, the parameter setting operation itself can be performed in the same manner as described above. However, in this example, the offset value can be further increased or decreased even after the values of all the parameters reach the upper limit or the lower limit. The correspondence between values is easy to understand.

Further, the relationship among the reference value, the current value, and the offset value is not limited to that of the above-described embodiment. Depending on the parameter characteristics, an exponential relationship may be preferable to the linear relationship as described above. For example, current value = reference value × a ^{offset value} (a is a real number larger than 1). Of course, other relationships are possible. In any case, the current value may be a value obtained by changing the initial value by the offset value.
Further, the parameter values set by the above-described method may relate to signal processing other than the compressor, and the number and combination of parameters are not limited to those described above.

The program of the present invention is a program for causing a computer to function as a parameter setting device so as to realize the above-described functions. In addition to being stored in advance in a ROM, HDD, etc., a CD-ROM, flexible disk, etc. This program is recorded on a non-volatile recording medium (memory) and provided, and the program is read from the memory to the RAM and executed by the CPU, or an external device or a program including the recording medium storing the program is stored in an HDD or the like. The same effect can be obtained even when downloaded from an external device stored in the means and executed.
In addition, the configurations and modifications described above can be applied in appropriate combinations within a consistent range.

As is clear from the above description, according to the parameter setting device or program of the present invention as described above, even when there are a large number of parameters used for acoustic signal processing, the parameter values can be easily set. Can be able to.
Therefore, by applying the present invention, it is possible to provide an acoustic signal processing device or parameter setting device with good operability.

It is a block diagram which shows the hardware constitutions of the acoustic signal processing apparatus containing embodiment of the parameter setting apparatus of this invention. It is a figure which shows the example of preset data. It is a figure which shows the example of current data. It is a figure which shows the example of a display of the screen which receives the setting of the parameter value shown in FIG. It is a figure which shows the relationship between the offset value of each parameter, and the present value. It is a flowchart of a process when there exists preset selection operation. It is a flowchart of a process when there is an operation for changing an offset value.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Acoustic signal processing apparatus, 11 ... CPU, 12 ... Flash memory, 13 ... RAM, 14 ... Detection circuit, 15 ... Display circuit, 16 ... Waveform I / O, 17 ... DSP, 18 ... System bus, 21 ... Operator , 22 ... Display, 100 ... Parameter setting screen, 101 ... Preset selection unit, 102-104 ... Knob, 105-107 ... Display unit, 108, 109 ... Graph

Claims (2)

A parameter setting device for setting values of a plurality of parameters used for acoustic signal processing,
A parameter memory for storing a plurality of sets of values of the plurality of parameters;
A current memory for storing values of the plurality of parameters used for the acoustic signal processing;
In response to a user operation, initial value setting means for reading out one set of values of the plurality of parameters from the parameter memory and setting the values as initial values of the parameters;
An offset setting means for setting a common offset value for the plurality of parameters according to a user operation;
Means for storing a value obtained by changing the initial value by the offset value for each of the plurality of parameters in the current memory as a parameter value used for the acoustic signal processing. Parameter setting device. A program for causing a computer to function as a parameter setting device for setting values of a plurality of parameters used for acoustic signal processing,
The computer,
A parameter memory for storing a plurality of sets of values of the plurality of parameters;
A current memory for storing values of the plurality of parameters used for the acoustic signal processing;
In response to a user operation, initial value setting means for reading out one set of values of the plurality of parameters from the parameter memory and setting the values as initial values of the parameters;
An offset setting means for setting a common offset value for the plurality of parameters according to a user operation;
A program for causing each of the plurality of parameters to function as means for storing, in the current memory, a value obtained by changing the initial value by the offset value as a parameter value used for the acoustic signal processing.

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