JPH07221576A - Sound field controller - Google Patents

Abstract

PURPOSE:To obtain sound field controller in which a sound field is automatically controlled. CONSTITUTION:A sound effect signal generating means 3 generates a sound effect signal from plural acoustic signals. An adjustment value setting means 6 sets a control variable used to adjust the plural acoustic signals to be optimum values and provides an output of a setting end signal after the end of setting of the control variable. A signal adjustment means 7 adjusts the plural acoustic signals to be optimum values according to the control variable set by the adjustment value setting means 6. A signal changeover means 4 selects an output signal from the sound effect signal generating means 3 and plural acoustic signals for inputs to the adjustment value setting means 6 when an input section 5 gives an on-signal to the means 4 and the means 4 selects an output signal from the sound effect signal generating means 3 and plural acoustic signals for inputs to the signal adjustment means 7 when the input section 5 gives an off-signal to the means 4 and the adjustment value setting means 6 gives the setting end signal to the means 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound field reproducing system for consumer audio devices such as system components and CD radio cassette recorders, AV devices such as television sets, and car audio devices.

[0002]

2. Description of the Related Art In recent years, a sound field control device for controlling a sound quality and a sound field according to a music source has been developed.

A conventional sound field control device will be described below with reference to the drawings. FIG. 10 is a block diagram showing a conventional sound field control device.

In FIG. 10, 101 is a left channel signal (L signal) input terminal, and 102 is a right channel signal (R signal).
(Signal) input terminal, 103 and 104 are A / D converters for A / D converting signals, and 105 is a digital signal processor (hereinafter referred to as DSP) for processing signals.
Reference numeral 06 denotes a D / A converter for D / A converting signals, 108 and 1
09 is an amplifier, 110 and 111 are speakers, 112 is a subtractor, 113 and 114 are multipliers, 115 is an adder, 11
6 is a subtractor, 117 is a filter, 18 is an input unit, 119
Is a microcomputer, and 120 is a memory.

The operation of the conventional sound field control device configured as described above will be described. L and R signals 101 and 102
Is A / D converted by A / D converters 103 and 104, and D
D / A converters 106 and 10 processed by SP105
It is D / A converted in 7 and supplied to speakers 110 and 111 via amplifiers 108 and 109, respectively. Where DS
The process in P5 can be changed by the mode selection in the input unit 118.

A specific operation of the DSP 5 will be described. The D / A converted signal is subtracted by a subtractor 112 to become an (LR) signal, which is a signal for a sound field effect, and a multiplier 1
13 and 114 multiply by a predetermined constant, the signal multiplied by the multiplier 113 is added to the L signal by the adder 115, the signal multiplied by the multiplier 114 is subtracted from the R signal by the subtractor 116, and the filter is added. At 117, frequency characteristics are given.
As for the frequency characteristic of the filter 117, a desired sound field mode is selected by the input unit 118, and the filter coefficient stored in the memory 120 is read by a command of the microcomputer 119, and the frequency characteristic is added to the input signal.

[0007]

However, the above-mentioned conventional configuration has a drawback in that the sound field effect signal level that varies depending on the music source is not taken into consideration, and the sound field effect is not constant depending on the music source. Further, the sound field control mode is variable only by the user's operation and is not automatically switched.

The present invention solves the above-mentioned conventional problems, and controls the levels of an acoustic signal and a sound field effect signal generated from the acoustic signal so as to match an optimal level ratio stored in advance. By doing so, a certain effect can be obtained regardless of the music source, and optimum control can always be performed. Further, by automatically selecting the amplitude frequency characteristic according to the rhythm of the music source, the sound quality can be automatically controlled without the user's operation. Furthermore, the level of the sound signal and the sound field effect signal generated from the sound signal is controlled to match the optimum level ratio,
By automatically adding reflected sound and reverberation sound according to the rhythm of the music source, a certain effect can be obtained regardless of the music source, and the sound field is automatically controlled without the user's operation. It is an object of the present invention to provide a sound field control device capable of performing the above.

[0009]

In order to achieve the above object, a sound field control device of the present invention comprises a sound field effect signal generating means for generating a sound field effect signal from a plurality of sound signals, and an acoustic field effect signal generating means. An input section to select ON or OFF of automatic adjustment,
A control value for adjusting a plurality of acoustic signals to an optimum value is set, and a plurality of adjustment values are output according to the control value set by the adjustment value setting means for outputting a setting end signal after the control value setting is completed. When the signal adjusting means for adjusting the acoustic signal to an optimum value and the input section are turned on, the output signal of the sound field effect signal generating means and a plurality of acoustic signals are used as the input of the adjusting value setting means. When the input unit selects OFF and when the setting end signal is input from the adjustment value setting unit, the output signal of the sound field effect signal generating unit and a plurality of acoustic signals are output from the signal adjusting unit. It is characterized in that it is provided with a signal switching means for inputting.

Further, the input section selects ON or OFF of automatic level adjustment of output signals of a plurality of acoustic signals and the sound field effect signal generating means, and the adjustment value setting means, A level ratio detecting means for detecting a ratio of sound pressure levels between a plurality of acoustic signals and an output signal of the sound field effect signal generating means is compared with an output of the level ratio detecting means and an optimal level ratio stored in advance. Then, it is composed of a plurality of acoustic signals and a signal level setting means for setting a value for adjusting the output signal of the sound field effect signal generating means so as to match the optimum level ratio, the signal adjusting means, The level of the plurality of acoustic signals and the output signal of the sound field effect signal generating means is controlled by the output of the signal level setting means.

Further, the input section selects ON or OFF of automatic adjustment of amplitude frequency characteristics of output signals of a plurality of acoustic signals and the sound field effect signal generating means, and the adjustment value setting means. Is composed of rhythm detecting means for detecting the rhythm of an arbitrary acoustic signal among a plurality of acoustic signals, and control value setting means for selecting a control value in accordance with the rhythm detected by the rhythm detecting means. The adjusting means controls the amplitude frequency characteristics of the plurality of acoustic signals and the output signal of the sound field effect signal generating means according to the control value of the control value setting means.

Further, the input section selects the automatic adjustment ON or OFF of the level of the output signals of the plurality of acoustic signals and the sound field effect signal generating means and the automatic adjustment of reflected sound or reverberation sound addition, The adjustment value setting means stores level ratio detection means for detecting a ratio of sound pressure levels between a plurality of acoustic signals and an output signal of the sound field effect signal generation means, and an output of the level ratio detection means. Compared with the optimal level ratio, and to match the optimal level ratio,
A signal level setting means for setting a value for adjusting a plurality of acoustic signals and an output signal of the sound field effect signal generating means; a rhythm detecting means for detecting a rhythm of an arbitrary acoustic signal among the plurality of acoustic signals; Control value setting means for selecting a control value according to the rhythm detected by the rhythm detecting means, and the signal adjusting means, according to the output of the signal level setting means, outputs a plurality of acoustic signals and the sound field effect. Controlling the level of the output signal of the sound signal generating means, and adding reflection and reverberation to the plurality of acoustic signals and the output signal of the sound field effect signal generating means according to the set value of the control value setting means. It is what

[0013]

In the present invention, the level ratio between the acoustic signal and the sound field effect signal is detected, and the signal level is automatically controlled so as to match the optimum level ratio stored in advance.
Also, the rhythm is detected from the acoustic signal, and the amplitude frequency characteristic of the signal is automatically controlled in accordance with the rhythm. Furthermore, the level ratio between the acoustic signal and the sound field effect signal is controlled to the optimum level ratio, and the reflected sound and reverberation sound are automatically added according to the rhythm of the acoustic signal.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. The first embodiment is a sound field control device that adjusts the sound signal and the sound field effect signal to have an optimum level ratio when the sound signal has two channels. Consider a case where a signal excluding the human voice frequency band is used as the sound field effect signal. FIG. 1 is a block diagram showing a configuration of a sound field control apparatus according to the first embodiment of the present invention. FIG. 2 is a block diagram showing an example of the sound field effect signal generating means. FIG. 3 is a block diagram showing an example of the level ratio detecting means.

In FIG. 1, 1 is a left channel signal (L
Signal) input terminal, 2 is a right channel signal (R signal) input terminal, 3 is an acoustic signal L input from the input terminals 1 and 2,
Sound field effect signal generating means for inputting R and generating sound field effect signals SL and SR, 5 is an input section for inputting ON or OFF of automatic level adjustment of the sound signal, and 6 is the sound signal and the sound field effect Adjustment value setting means for setting a control value of a control signal and outputting a setting end signal after the control value setting is completed, 7 is a signal adjusting means for controlling according to the control value of the adjustment value setting means 6, and 4 is an input section 5 for turning on. When selected, the output signals SL and SR of the sound field effect signal generating means 3 and the acoustic signals L and R are input to the adjustment value setting means 6, and when the input section 5 selects OFF and the adjustment value setting means. When the setting end signal from 6 is input, the output signals SL and S of the sound field effect signal generating means 3 are input.
Signal switching means for inputting R and acoustic signals L and R to the signal adjusting means 7, 8 is an output signal terminal for the L signal, 9 is an output signal terminal for the R signal, and 10 is an output for the sound field effect signal SL '. A signal terminal 11 is an output signal terminal for the sound field effect signal SR '. The adjustment value setting means 6 is composed of the level ratio detecting means 12 and the signal level setting means 13, and the signal adjusting means 7 is composed of the multipliers 14 to 17.

The operation of the sound field control device configured as described above will be described below.

First, when the automatic level adjustment "ON" is selected at the input section 5, the signal switching means 4 causes the acoustic signal L,
R and the sound field effect signal SL of the sound field effect signal generating means 3,
The SR is switched so as to be input to the level ratio detecting means 12. The level ratios CL and C between the acoustic signals L and R calculated by the level ratio detection means 12 and the sound field effect signals SL and SR.
R is input to the signal level setting means 13. The signal level setting means 13 sets the level adjustment value so that the level ratios CL and CR match the preset optimum level ratio ML. After the adjustment value is set, the setting end signal is output from the signal level setting means 13, and the signal switching means 4 outputs the acoustic signals L and R and the sound field effect signals SL and SR of the sound field effect signal generating means 3. It is switched so as to be input to the adjusting means 7, and is multiplied by the multipliers 14 to 17 according to the level adjustment value set by the signal level setting means 13.

The operation of the sound field effect signal generating means 3 will be described with reference to FIG. In this embodiment, a signal excluding the human voice frequency band is used as the sound field effect signal. In FIG. 2, the acoustic signal L is a low-pass filter (hereinafter, L
Abbreviated as PF. ) 18 and a high-pass filter (hereinafter abbreviated as HPF) 19 and LP
The output of F18 and the output of HPF19 are added by the adder 20, and the signal excluding the human voice frequency band is output as the sound field effect signal SL. Similarly, the acoustic signal R is processed by the LPF 21 as well as by the HPF 22.
And the output of the HPF 22 are added by the adder 23 and output as the sound field effect signal SR.

Next, the operation of the adjustment value setting means 6 will be described with reference to FIG. The adjustment value setting means 6 is composed of a level ratio detecting means 12 and a signal level setting means 13.
In FIG. 3, the acoustic signals L and R and the sound field effect signals SL and SR input to the level ratio detection means 12 are detected by the detection circuit 24.
27 to 27, the envelope of the signal subjected to DC detection is detected, and the peak value detection circuits 28 to 31 detect the maximum value.
The maximum value PL of the acoustic signal L detected by the peak value detection circuit 28 is divided by the maximum value PSL of the sound field effect signal SL detected by the peak value detection circuit 30 and the level ratio CL is output by the division circuit 32. To be done. Similarly, the peak value detection circuit 2
The maximum value PR of the acoustic signal R detected in 9 is the maximum value P of the sound field effect signal SR detected by the peak value detection circuit 31.
The SR is divided by the division circuit 33 to output the level ratio CR. CL and CR are represented by (Equation 1) and (Equation 2).

[0020]

[Equation 1]

[0021]

[Equation 2]

The outputs CL and CR of the level ratio detecting means 12 are input to the signal level setting means 13 and the optimum level ratio ML is supplied.
And adjust the level so that they match. In this embodiment, the acoustic signals L and R are output as they are, and the sound field effect signals SL and SR are adjusted. When the sound field effect signals to be adjusted and output are SL ′ and SR ′, they are expressed as in (Equation 3) and (Equation 4).

[0023]

[Equation 3]

[0024]

[Equation 4]

Further, (Equation 1), (Equation 2) and (Equation 3),
From (Equation 4), SL ′ and SR ′ can be expressed as (Equation 5) and (Equation 6).

[0026]

[Equation 5]

[0027]

[Equation 6]

Therefore, the acoustic signals L and R of the signal adjusting means 7
"1" is output to the multipliers 14 and 15 of the sound field effect signal SL and the multiplier 16 of the sound field effect signal SL is calculated from ML / CL according to (Equation 5).
Is output to the multiplier 17 of the sound field effect signal SR,
ML / CR is output from (Equation 6).

As described above, by controlling the level ratio of the acoustic signal and the sound field effect signal generated from the acoustic signal so as to match the pre-stored optimum level ratio, regardless of the music source. A certain effect can be obtained and the control can always be performed optimally.

Next, a second embodiment of the present invention will be described. In the first embodiment, the acoustic signal and the sound field effect signal are adjusted so as to have the optimum level ratio, but in the second embodiment, the amplitude frequency characteristic is automatically adjusted according to the rhythm of the acoustic signal. It is something to choose.

FIG. 4 is a block diagram showing the configuration of the sound field control device in the second embodiment of the present invention. FIG. 5 is an example of the rhythm detecting means, and FIG. 6 is a waveform diagram at each point of the rhythm detecting means in the second embodiment.

In FIG. 4, the sound field effect signal generating means 3
Operates in the same manner as in the first embodiment. 34 is a left channel signal (L signal) input terminal, 35 is a right channel signal (R signal) input terminal, 3 is a sound field effect signal SL with the acoustic signals L and R input from the input terminals 1 and 2 as inputs. SR
The sound field effect signal generation means 5 for generating the sound field, 5 is an input unit for inputting ON or OFF of the amplitude frequency characteristic automatic adjustment of the sound signal, and 36 is a control value for setting the control values of the sound signal and the sound field effect signal. Adjustment value setting means for outputting a setting end signal after completion of setting, 38 is signal adjusting means for controlling according to the control value of the adjustment value setting means 37, and 36 is the adjustment value of the acoustic signal L when ON is selected by the input unit 5. When the input means 5 selects OFF as the input of the setting means 37 and the adjustment value setting means 3
When the setting end signal from 7 is input, the output signals SL and SR of the sound field effect signal generation means 3 and the acoustic signals L and R are input.
Signal switching means for inputting and to the signal adjusting means 38,
39 is an output signal terminal for an L signal, 40 is an output signal terminal for an R signal, 41 is an output signal terminal for a sound field effect signal SL ', 4
Reference numeral 2 is an output signal terminal for the sound field effect signal SR '. The adjustment value setting means 37 is composed of the rhythm detecting means 43 and the control value setting means 44, and the signal adjusting means 38 is composed of filters 45 to 48.

The operation will be described below. First,
When the amplitude frequency characteristic automatic adjustment “ON” is selected by the input unit 5, the signal switching unit 36 switches the acoustic signal L to be input to the rhythm detecting unit 43. The cycle value Ti of the acoustic signal L calculated by the rhythm detection means 43 is input to the control value setting means 44. The control value setting means 44 compares the period value Ti with a preset reference period value Ti and sets a control value to be output to the filters 45 to 48.
After setting the control value, the control value setting means 44 outputs a setting end signal, and the signal switching means 36 outputs the acoustic signals L and R and the sound field effect signals SL and SR of the sound field effect signal generating means 3.
Are switched to be input to the signal adjusting means 38,
According to the control value set by the control value setting means 37, the amplitude frequency characteristics are controlled by the filters 45 to 48.

The operation of the adjustment value setting means 37 will be described with reference to FIG. In the present embodiment, for example, the reference cycle value Tm of the signal is set in advance, and when the cycle value is larger than Tm (in slow tempo) and smaller than Tm (in up tempo) with the reference cycle value Tm as a threshold value. ) And change the amplitude frequency characteristic.

The adjustment value setting means 37 is a rhythm detecting means 4
3 and control value setting means 44. In FIG. 5, the acoustic signal L input to the rhythm detection means 43 passes through a bandpass filter (hereinafter abbreviated as BPF) 49 set so as to extract a frequency range of a musical instrument forming a rhythm, for example, a bass, When the output of the BPF 49, that is, the waveform (a) shown in FIG. 6 is input to the DC detection circuit 50, the output has the waveform shown in FIG. The output of the DC detection circuit 50 has the DC component removed by the DC component removal circuit 51.
6C, and the output of the DC component removing circuit 51 is binarized by the binarizing means 52 to obtain the waveform shown in FIG. 6D. The time measuring means 53 measures the cycle of the output signal of the binarizing means 52 and outputs the cycle value Ti. The output signal of the clock means 53 is compared with the preset reference period value Tm by the control value setting means 44. Period value Ti is (Equation 7)
Filter 45 of the signal adjusting means 38 depending on the range (up tempo from the reference) or the range (slow tempo)
The control value output to 48 is changed.

[0036]

[Equation 7]

[0037]

[Equation 8]

As described above, by automatically selecting the amplitude frequency characteristic in accordance with the rhythm of the acoustic signal, the sound quality can be automatically controlled without the user's operation.

Next, a third embodiment of the present invention will be described. In the first embodiment, adjustment is performed so that the acoustic signal and the sound field effect signal have the optimum level ratio, and the second embodiment is
Although the amplitude frequency characteristic is automatically selected according to the rhythm of the acoustic signal, in the third embodiment, the reflected sound is automatically added according to the rhythm of the acoustic signal, and the acoustic signal and the sound field are The adjustment is performed so that the effect signal has the optimum level ratio.

FIG. 7 is a block diagram showing the arrangement of a sound field control apparatus according to the third embodiment of the present invention. FIG. 8 is a block diagram showing an example of a reflected sound generating circuit which constitutes reflected sound generating means in the third embodiment of the present invention, and FIG. 9 shows an example of a reflection pattern in the third embodiment of the present invention. It is a characteristic diagram.

In FIG. 7, when the automatic adjustment "ON" is selected by the input unit 5, the signal switching means 4 causes the acoustic signal L,
R and the sound field effect signal SL of the sound field effect signal generating means 3,
The SR is switched to the level ratio detecting means 12 and the rhythm detecting means 43. The level ratios CL and CR of the acoustic signals L and R and the sound field effect signals SL and SR calculated by the level ratio detecting means 12 are input to the signal level setting means 13. Signal level setting means 13
Then, the level adjustment values are set so that the level ratios CL and CR match the preset optimum level ratio ML.
After setting the adjustment value, the setting end signal is output from the signal level setting means 13, and the cycle value Ti of the acoustic signal L calculated by the rhythm detection means 43 is input to the control value setting means 62. In the control value setting means 62, the cycle value Ti is compared with a preset reference cycle value Ti, and the reflected sound generating means 6 is compared.
Set the control value to be sent to 3. After the control value is set, a setting end signal is output from the control value setting means 62, and the signal switching means 4 adjusts the acoustic signals L and R and the sound field effect signals SL and SR of the sound field effect signal generating means 3 by signal adjustment. The reflected sound is added to the reflected sound generation means 63 according to the control value set by the control value setting means 62 to add the reflected sound, and the level set by the signal level setting means 13 is changed. Multipliers 14 to 17 multiply according to the adjustment value.

Now, the operation of the adjustment value setting means 56 will be described. In the third embodiment, for example, a reference period value Tm of a signal is set in advance, and when the period value is larger than Tm (slow tempo) and smaller than Tm (uptempo tempo by using the reference period value Tm as a threshold value). And), the reflected sound added to the signal is changed, and adjustment is performed so that the acoustic signal and the sound field effect signal have the optimum level ratio.

The adjustment value setting means 56 is a level ratio detecting means 12 for setting an optimum level ratio and a signal level setting means 13.
And rhythm detection means 4 for adding reflected sound in accordance with the rhythm
3 and control value setting means 62. The part for setting the optimum level ratio is the same as in the first embodiment. The rhythm detecting means 43 is also the same as that of the second embodiment, and measures the period of the signal and outputs the period value Ti. The output signal of the clock means 53 is compared with the preset reference period value Tm by the control value setting means 62. The reflected sound parameter output to the reflected sound generating means 63 of the signal adjusting means 57 is changed depending on whether the period value Ti is in the range of (Equation 7) (up tempo from the reference) or in the range of (Equation 8) (slow tempo).

Next, referring to FIG. 8, the reflected sound generating means 63
Will be described. The reflected sound generation means 63 includes the reflected sound generation circuit shown in FIG. 8 for each signal.

Reflection sound generation by convolution calculation creates signals having various time delays and amplitude levels from an input signal (direct sound) based on the reflection sound parameters (delay time, amplitude level) shown in FIG. Overlap. As shown in FIG. 9, the reflected sound parameter of a certain channel has a delay time τ _i (i = 1, 2, ...
.., n) and the amplitude level a _i , the delay memory 65 having a multi-tap is used to delay from each tap corresponding to the delay time τ _i as shown in FIG. The signals are taken out, gains a _i are respectively applied by the amplitude adjuster 66, and the adder 67
To synthesize. As a result, from the adder 67 (Equation 9)
The reflected sound signal is output.

[0046]

[Equation 9]

As described above, by controlling the level ratio of the sound signal and the sound field effect signal generated from the sound signal so as to match the pre-stored optimum level ratio, regardless of the music source. A certain effect can be obtained and it can always be optimally controlled.Furthermore, by automatically selecting the reflected sound pattern that is convoluted with the signal according to the rhythm of the acoustic signal, the sound field can be automatically adjusted without any user operation. Can be controlled.

[0048]

As described above, according to the present invention, by controlling the level of the acoustic signal and the sound field effect signal generated from the acoustic signal so as to match the pre-stored optimum level ratio, A certain effect can be obtained regardless of the source, and optimum control can always be performed. Further, by automatically selecting the amplitude frequency characteristic according to the rhythm of the music source, the sound quality can be automatically controlled without the user's operation. Furthermore, the level of the acoustic signal and the sound field effect signal generated from the acoustic signal are controlled to match the optimum level ratio, and reflected sound and reverberation sound are automatically added according to the rhythm of the music source. Due to
A certain effect can be obtained regardless of the music source, and the sound field can be automatically controlled without the user's operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a sound field control device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a sound field effect signal generating means in the first embodiment.

FIG. 3 is a block diagram showing an example of a level ratio detecting means in the first embodiment.

FIG. 4 is a block diagram showing a configuration of a sound field control device according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing an example of rhythm detecting means in the second embodiment.

FIG. 6 is a waveform diagram at each point of the rhythm detecting means in the second embodiment.

FIG. 7 is a block diagram showing a configuration of a sound field control means according to a third embodiment of the present invention.

FIG. 8 is a block diagram showing an example of a reflected sound generation circuit according to the third embodiment.

FIG. 9 is an explanatory view showing a reflection pattern in the third embodiment.

FIG. 10 is a block diagram showing a configuration of a conventional sound field control device.

[Explanation of symbols]

 1, 2, 34, 35, 54, 55, 64 Input terminal 3 Sound field effect signal generating means 4, 36 Signal switching means 5 Input part 6, 37, 56 Adjustment value setting means 7, 38, 57 Signal adjusting means 8 -11, 39-42, 58-61, 68 Output terminal 12 Level ratio detecting means 13 Signal level setting means 14, 15, 16, 17 Multiplier 18, 21 LPF 19, 22 HPF 20, 23, 67 Adder 24- 27 detection circuit 28-31 peak value detection circuit 32, 33 division circuit 43 rhythm detection means 44 control value setting means 45-48 filter 49 BPF 50 DC detection circuit 51 DC component removal circuit 52 binarization means 53 timing means 63 reflected sound Generating means 65 Delay memory 66-1 to 66-n Amplitude adjuster

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04S 1/00 D 8421-5H 5/02 8421-5H

Claims (5)

[Claims] 1. A sound field effect signal generating means for generating a sound field effect signal from a plurality of sound signals, an input section for selecting ON or OFF of automatic adjustment of sound signals, and a plurality of sound signals having optimum values. A control value for adjusting the control value, and an adjustment value setting means for outputting a setting end signal after the control value setting is completed; and according to the control value set by the adjustment value setting means, a plurality of acoustic signals are adjusted to the optimum values. When the ON is selected in the signal adjusting unit and the input unit, the output signal of the sound field effect signal generating unit and a plurality of acoustic signals are input to the adjustment value setting unit, and the OFF is set in the input unit. When the selection is made and when the setting end signal is inputted from the adjustment value setting means, a signal switching means for inputting the output signal of the sound field effect signal generating means and a plurality of acoustic signals to the signal adjusting means. Having Sound field control device according to claim. 2. The input section selects ON or OFF of automatic level adjustment of output signals of a plurality of acoustic signals and a sound field effect signal generating means, and the adjustment value setting means has a plurality of acoustic values. A level ratio detecting means for detecting a ratio of a sound pressure level between a signal and an output signal of the sound field effect signal generating means, and comparing an output of the level ratio detecting means with an optimal level ratio stored in advance, And a signal level setting means for setting a value for adjusting the plurality of acoustic signals and the output signal of the sound field effect signal generating means so as to match the optimum level ratio. The level of a plurality of acoustic signals and the output signal of the sound field effect signal generating means is controlled by the output of the means.
The sound field control device described. 3. The input section selects ON or OFF of automatic adjustment of amplitude frequency characteristics of output signals of a plurality of acoustic signals and sound field effect signal generating means, and the adjustment value setting means comprises a plurality of adjustment value setting means. The rhythm detecting means for detecting the rhythm of an arbitrary acoustic signal among the acoustic signals of, and the control value setting means for selecting a control value according to the rhythm detected by the rhythm detecting means, the signal adjusting means, According to the control value of the control value setting means,
The sound field control device according to claim 1, wherein amplitude frequency characteristics of a plurality of acoustic signals and an output signal of the sound field effect signal generation means are controlled. 4. The input section selects automatic adjustment ON or OFF of the level and amplitude frequency characteristic of the output signal of the plurality of acoustic signals and the sound field effect signal generation means, and the adjustment value setting means A level ratio detecting means for detecting a sound pressure level ratio between a plurality of acoustic signals and an output signal of the sound field effect signal generating means, and an output of the level ratio detecting means and an optimal level ratio stored in advance. And a signal level setting means for setting a value for adjusting a plurality of acoustic signals and an output signal of the sound field effect signal generating means so as to match the optimum level ratio, and a plurality of acoustic signals. The rhythm detecting means detects the rhythm of an arbitrary acoustic signal, and the control value setting means selects a control value according to the rhythm detected by the rhythm detecting means. The level of a plurality of acoustic signals and the output signal of the sound field effect signal generation means is controlled according to the output of the means, and the plurality of acoustic signals and the sound field effect signal generation are performed according to the set value of the control value setting means. The sound field control device according to claim 1, wherein the amplitude frequency characteristic with the output signal of the means is controlled. 5. The input unit selects a level of output signals of a plurality of acoustic signals and a sound field effect signal generating unit and automatic adjustment of reflection sound or reverberation sound addition ON or OFF, and an adjustment value. The setting means includes a level ratio detecting means for detecting a ratio of sound pressure levels of a plurality of acoustic signals and an output signal of the sound field effect signal generating means, an output of the level ratio detecting means and an optimum level stored in advance. And a signal level setting unit that sets a value for adjusting the plurality of acoustic signals and the output signal of the sound field effect signal generation unit so as to match the optimum level ratio, and a plurality of acoustic signals. The rhythm detection means detects a rhythm of an arbitrary acoustic signal, and the control value setting means selects a control value according to the rhythm detected by the rhythm detection means. The level of a plurality of acoustic signals and the output signal of the sound field effect signal generating means according to the output of the sound setting means, and according to the set value of the control value setting means, the plurality of acoustic signals and the sound field effect The sound field control device according to claim 1, wherein reflection and reverberation are added to the output signal of the signal generation means.