JPH03285410A - Audio device - Google Patents

Abstract

PURPOSE:To easily make the total frequency characteristic of an entire audio device coincident to a desired characteristic by providing a display mode partial changing means to change display modes in a band to be changed by the operation of a frequency characteristic change operating means and in the other band concerning the frequency characteristic display of a frequency characteristic display means corresponding to the operation of the frequency characteristic change operating means in a frequency characteristic change device. CONSTITUTION:A microcomputer 26 is equipped with a CPU, ROM and RAM connected by a bus and executes the variable control of a graphic equalizer characteristic, display control of the characteristic and spectrum analizer display control corresponding to the operation of a key operation part 28 based on a prescribed program stored in the ROM. On the other hand, the microcomputer 26 is equipped with a function as the display mode partial changing means to execute the display mode partial change control for changing the display mode on an FL tube display 30 in the band, to which loudness control is executed, and the other band according to a loudness control operation on the side of a control amplifier and concretely, in the band controlled in loudness, inverted display control is executed for ON/OFF segments.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio device, and more particularly to an audio device that includes a graphic equalizer with a spectrum analyzer and a frequency characteristic changing device other than the graphic equalizer, either integrally or separately.

(Problems to be solved by conventional technology and the invention) A graphic equalizer with a spectrum analyzer (hereinafter simply referred to as "GRAICO with a spectrum analyzer") divides the audio band into a number of bands such as 7 and 9 to select the desired frequency. Characteristics can be set.

When you systemize GRAICO with a spectrum analyzer and equipment that has a frequency characteristic change function other than GRAICO, such as a control amplifier, in addition to adjusting the frequency characteristics for each band using GRAICO, you can also adjust the frequency separately by tone control, loudness control, etc. on the control amplifier. Characteristics can be changed.

In this case, the graphic equalizer characteristics (hereinafter simply referred to as "Glyco characteristics , because the frequency characteristics were not specifically displayed, the user was unable to know in which band these frequency characteristics were changed or how much they were changed. It was difficult to match the overall frequency characteristics to the desired characteristics.

This invention was made in view of the above-mentioned conventional problems.
An audio device that makes it easy to see which band has been changed when a frequency response change operation other than GRACO is performed, making it easy to adjust the overall frequency response of the audio device to the desired characteristic. Its purpose is to provide.

Another object of the present invention is to provide an audio device that can more accurately adjust the overall frequency characteristics of the audio device to desired characteristics.

[Means to solve the problem]

The audio device of the present invention includes a graphic equalizer with a spectrum analyzer having a frequency characteristic display means for displaying the frequency spectrum of an audio signal or a frequency characteristic of a graphic equalizer characteristic, and a frequency characteristic changing operation for changing a frequency characteristic other than the graphic equalizer. and (2) a frequency characteristic changing device for changing the frequency characteristic of an audio signal according to an operation by the frequency characteristic changing operating device, the frequency characteristic changing device having a frequency characteristic changing device having: display mode partial changing means for changing the display mode between a band changed by the operation of the frequency characteristic changing operation means and another band among the frequency characteristics displayed by the frequency characteristic display means in accordance with the operation of the frequency characteristic display means. It is characterized by

Another audio device of the present invention provides a band that is changed by operating the frequency characteristic changing operating means of the frequency characteristic displaying means in response to the operation of the frequency characteristic changing operating means of the frequency characteristic changing device instead of the display mode partial changing means. L2 is characterized in that it includes change amount display control means for displaying the change amount in the frequency characteristic changing device simultaneously with the frequency characteristic display of the frequency spectrum of the audio signal or the graphic equalizer characteristic.

〔Example〕

Next, a first embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a block diagram showing the configuration of an audio device according to the present invention.

After the audio signal is subjected to loudness and tone control by a control amplifier 1G, which is an example of a frequency characteristic changing device, it is input to a GRAICO 20 with a spectrum analyzer, where frequency characteristics are adjusted for each band, and then sent to a power amplifier 40.
The signal is output to the speaker SP, where it is amplified in power and then converted into sound by the speaker SP.

The control amplifier 10 has an audio signal input terminal A
-IN is connected to a loudness control circuit 12 as an example of frequency characteristic changing means, and a tone control circuit 14 as another example of frequency characteristic changing means is connected to the output side of this loudness control circuit I2.

The output side of the tone control circuit 4 is connected to the audio signal input terminal A-IN' of the GRAICO 20 with spectrum analyzer via the audio signal output terminal ^-OU.

A microcomputer 16 is connected to the control input sides of the loudness control circuit 12 and tone control circuit 14, and changes in frequency characteristics are controlled separately for each.

When the loudness on control is performed, the loudness control circuit 12 controls the audio band so that the center frequency is f,=
64,f,-125,f,=250,"4=500S
fs = 1, fb = 2, ft-4k.

Assuming that f*=8k and fq=16kHz are divided into nine bands, the first to ninth bands, the first and second bands are raised by +6 dB, and the eighth and ninth bands are raised by +4 dB.

The tone control circuit 14 raises the first and second bands by +8 dB when pass boost control is performed, and conversely raises the first and second bands by +8 dB when pass cut control is performed.
dB, and when treble boost control is performed, the 8th and 9th bands are raised by +8 dB.
Conversely, when treble cut control is performed, the eighth and ninth bands are lowered by 18 dB.

A key operation unit 18 is connected to the microcomputer 16 as a frequency characteristic changing operation means. The key operation unit 18 includes a loudness key for turning on and off the loudness, a pass boost key for turning on and off the pass boost,
Passcut key to turn the passcut on/off, treble boost key to turn the treble boost on/off
A treble cut key is provided to turn treble cut on and off.

A Graph Ink equalizer circuit (hereinafter simply referred to as the "Glyco circuit") 22 is connected to the ^-IN'i terminal of the Glyco 20 with a spectrum analyzer, and this output side is connected to the A-0υ terminal.
The terminal is connected to a spectrum analyzer circuit (hereinafter simply referred to as "spectrum analyzer circuit") 24.

A microcomputer 26 is connected to the control input side of the Glyco circuit 22, and variable control of frequency characteristics for each band is performed.

The Glyco circuit 22 divides the audio band into the aforementioned nine bands, and varies the frequency characteristics in 2 dB steps within a range of ±12 dB for each band.

The spectrum analyzer circuit 24 detects the signal level of each band of the audio signal output from the GLICO circuit 22, and
It is converted and output as band-specific signal level data.

The output side of the spectrum analyzer circuit 24 is a microcomputer 26.
The frequency spectrum display (hereinafter simply referred to as "spectrum analyzer display") is controlled based on band-specific signal level data.

A key operation section 28 and an FL tube display 30 as frequency characteristic display means are connected to the microcomputer 26.

The key operation section 28 is equipped with an up key and a down key provided separately for the first to ninth bands, and a G/S key, and outputs a key-on signal in response to a key-on operation to the microcomputer 26. .

The FL tube display 30 is configured as shown in FIG. 2, and has nine grids c and -G arranged horizontally in each of the first to ninth bands, and each grid has a , red, green, and yellow fluorescent color segments 32A, 32B, and 32C, 13 sets of segments are arranged in a line in the vertical direction from bottom to top.

The 13 sets of segments are related to glyco properties, starting from the bottom -1
2, -10, -8, -6, -4, -2,0, +2, +4
, +6, +8, +10, and +12 (dB) levels.

Grids 01-G have nine scanning lines g1-g.

It is connected to the output side of the microcomputer 26 by.

Segments of the same color at the same level are commonly connected over the entire band, and segment drive lines XI' = X13, yI-yl, z+-z+, each of 13 colors of red, green, and yellow.
1 is connected to the a terminal, b terminal, and C terminal on the output side of a display mode changeover switch (hereinafter simply referred to as "switch") SW for one-system human-powered three-system output.

The input side of the switch SW has 13 segment drive lines S.
I~SI! and is connected to the output side of the microcomputer 26.

When the switch SW is switched to the a side, the segment drive lines S and ~SI2 are connected to the segment drive lines Xr-XI, respectively.
When connected individually to 3, the FL tube display 30 becomes a red display mode, and when switched to the b side, the segment drive line)'I-V+x is individually connected to a green display mode, and switched to the a side. When it is connected to E+""Z13, it becomes a yellow display mode.

The scanning line g'gx* gm* gq is connected to the microcomputer 16 via the scanning signal output terminal 5-OUT of the Glyco 20 with spectrum analyzer and the scanning signal input terminal 5-IN of the control amplifier 10, and the switch S
The switching control signal line of W is the switching control signal input terminal C.
-IN and the microcomputer 16 via the switching control signal output terminal C-0UT.

Further, the microcomputer 16 and the microcomputer 26 have a data output terminal D-OUT and a data input terminal 0.
They are connected by a data line via 4N.

The microcomputer 16 is a bus-connected CPU, R
The microcomputer 26 includes an OM and a RAM, and performs control to change the frequency characteristics of loudness and tone according to operations on the key operation unit 18 based on a predetermined program stored in the ROM, and performs switching control for the switch SW. It also outputs flag data indicating whether loudness is on or off.

The microcomputer 16 and the switch SW constitute a display mode partial change means for changing the display mode on the FL tube display 30 between the tone-controlled band and other bands according to the tone control operation. In this embodiment, a band boosted by the tone control is displayed in red, a band cut is yellow, and a band not boosted or cut is green.

The RAM of the microcomputer 16 contains a bass boost flag BB (Q: off, 1: on, below #), a bass cut flag BC, a treble boost flag TB, )
An area is provided to store a level cut flag TC and a loudspeaker flag LD.

The microcomputer 26 is a bus-connected CPUt,
It includes a ROM and a RAM, and performs variable control of glyco characteristics according to farming, display control of glyco characteristics, and spectrum analyzer display control using the key operation unit 28 based on a predetermined program stored in the ROM.

The microcomputer 26 also controls a display mode that performs display mode partial change control to change the display mode on the FL tube display 30 between the loudness-controlled band and other bands in accordance with the loudness control operation on the control amplifier side. It has a function as a mode partial changing means, and specifically, in this embodiment, in the band where the loudness is applied, the lighting segment and the lighting segment are reversely displayed.

The RAM of the microcomputer 26 stores a G/S flag (0: spectrum analyzer, 1: glaico) indicating whether the display state of the FL tube display 30 is a glyco characteristic or a spectrum analyzer display, a loudness flag LD', and glyco characteristic data for each band. gd+
- An area for storing gdQ is provided.

Furthermore, the ROM of the microcomputer 26 stores band-specific signal level data fd+(
i = 1 to 9, corresponding to the 1st to 9th bands) on a logarithmic scale from the lowest level (all 13 segments related to the color are off) to the highest level (all 13 segments are lit)
Standard level data for dividing into 14 levels is stored.

Next, the operation of this embodiment will be explained with reference to the flowcharts shown in FIGS. 3 to 7 and the display state diagrams shown in FIGS. 8 and 9.

3 and 4 show the operation of the microcomputer 16, and FIGS. 5 to 7 show the operation of the microcomputer 26.

Note that the flags BB, BC, TB, TC, and LD stored in advance in the RAM of the microcomputer I6 are all set to O.
Assume that R of the microcomputer 26 is
Glyco characteristic data by band stored in AM gd+~
It is assumed that gdv is also all O (dB) and flag LD' is O.

When the power switch of the control amplifier 10 is turned on, the microcomputer 16 sets the flags 8B, BC, TB.
, performs predetermined initial setting processing with reference to TC and LD,
Loudness off control is performed on the loudness control circuit 12 to give it a flat characteristic, and the tone control circuit 14 is also made to have flat characteristics in terms of noise and treble.

As a result, the audio signal input to the control amplifier 10 from the outside is output to the GRAICO 20 with a spectrum analyzer with flat characteristics.

Further, the microcomputer 16 switches the switch SW to the b side in the initial setting process (step 50 in FIG. 3).

On the other hand, when the power switch of the GRICO 20 with spectrum analyzer is turned on, the microcomputer 26 performs a predetermined initial setting process, clears the flag G/S, sets the spectrum analyzer mode, and sets i=1, and also refers to gd1 to gd. Then, control is performed to set a flat frequency characteristic for the Glyco circuit 22 (step 150 in FIG. 5).

Since the GLICO circuit 22 has flat characteristics, the audio signal input from the control amplifier 10 is output to the power amplifier 40 with flat characteristics, where the power is amplified and then output to the speaker SP. is converted into sound.

Since the flag G/S of the microcomputer 26 is 0,
Band-specific signal level data fd related to the first band is input from the spectrum analyzer 24 (steps 152 and 154), and band-specific display level data PD converted to a logarithmic scale using the reference level data group is obtained (step 156).

In this embodiment, FD is assumed to take a value from 0 to 13, and 1 to 13 correspond to the segment positions from set 1 to set 13 of one band.

Here, it is assumed that FD+=5.

Since f=1, it is necessary to determine whether LD' is 1 or not in step 158.
．． 160), in this case it is NO, so Fil from the 1st set.

Segment drive lines S- to S5 corresponding to up to =5 sets are driven (step 162).

Next, the scanning line g+ is scanned to drive the grid G (
Step 164).

When scan &i g + is scanned, the microcomputer 16 determines YES in step 52 of FIG.
Since the flags BB and BC are both 0, the switch SW remains on the b side (steps 54 to 58).

Since the switch SW is on the b side, the grid G
, is driven, the green segment 32B of 14 dB or less in the first band lights up.

After step 164, the micro combinator 26 waits for a certain period of time, sets l to 2, returns to step 152 (steps 166 to 170), and this time inputs the band-by-band signal level data fdz related to the second band and converts it into a logarithmic scale. Find FDz (steps 154 and 156). Here, FDz=8.

Since D is 0, the segment driving line segments S, ~S, from 1&ll to 8 sets are driven (steps 158 and 160).
．． 162).

Subsequently, when the grid G2 is driven by scanning the scanning line gz (step 164), the green segment 32B of +2 dB or less in the second band lights up.

Thereafter, spectrum analyzer display control is performed in the same manner from the third band to the seventh band.

When the scanning line gI is scanned in the same manner for the eighth band, the micro combinator 16 moves to step 6 in FIG.
If it is 0, it is judged as YES, but both flags TB and TC are O.
Therefore, the switch SW is left on the b side (No determination in steps 62 and 64), and the green spectrum analyzer display continues.

After the processing of the 9th band is completed, the microcomputer 26 returns to the 1st band side (YE at step 168 in FIG. 5).
S's decision, step 172).

In this way, when the frequency characteristic changing operation such as pass boost or bass cut is not performed on the control amplifier 10 side, the switch SW is switched to the b side, so the spectrum analyzer is displayed in the green display mode for all bands. (
(See Figure 8 1)).

In this state, if you want to raise the 1st band by about +2 dB for the entire control amplifier 10 and Glyco 20 with spectrum analyzer, since the 1st band is displayed in green, simply raise it by +2 dB on the Glyco 20 with spectrum analyzer side. It turns out that it is better if

In this case, first, when the G/S key of the key operation unit 28 is turned on, a key interrupt occurs in the microcomputer 26, and the process moves to the key interrupt flow shown in FIG.
It is judged as ES, and the flag G/S is inverted and set to ■ to set the glyco mode (step 202). Then, when the flow returns to the flow shown in FIG. 5, the judgment in step 152 becomes No, and if i=1, LIl' =0, so the seventh set of segment drive lines s7 corresponding to the level of gd, -0 is driven (steps 174 to 178).
Then, the scanning line gI is scanned (step 164).

At this time, the microcomputer 16 sets the switch SW to the b side, so the OdB green segment 3 of the first band
2B lights up.

After waiting for a certain period of time, the microcomputer 26 calculates i=
2 and steps 166 to 170), step 15
Return to the 2nd side. gd, is also O, so segment drive line S,
Steps 174-178), scan line g2
is scanned (step 164).

When the scanning line g2 is scanned, the microcomputer 1 also
6, the switch SW remains in the b side, so the OdB green segment 32B of the second band lights up.

Below, green segment 32B of OdB sequentially up to the 9th band.
lights up, and when the scanning of the 9th band is completed, it returns to the 1st band side.

As a result, the FL tube display 30 displays a flat Glyco characteristic for all bands in green display mode, and the user can simply look at the spectrum analyzer display to see that the bass and treble are neither boosted nor cut by the control amplifier 10. I understand that.

In this state, the user selects the first band ([1) of the key operation unit 28.
When the up key related to is turned on once, the microcomputer 26 generates a key interrupt, judges YES in step 204 of FIG. 6, and flag G/S is I, so gd+
Set +2 and step 206.208), gd+~gd
, the frequency characteristic variable I for the Glyco circuit 22 based on
II control to raise the first band to +2 dB (
Step 210).

After completing the key interrupt processing and returning to the flow shown in Figure 5, 1
In the process of step 178 when ==1, gd.

Since the segment drive jlIS is driven based on -12, the +2 dB green segment l-32B lights up in the is-th region.

As a result, the overall frequency characteristic including the control amplifier 10 and the GLICO 20 with spectrum analyzer has the first band raised by +2 dB, and the characteristic desired by the user is obtained (see FIG. 8 (2)).

When you turn on the G/S key after finishing the operation to change the Glyco characteristic, the microcomputer 26 sets the flag G/S.
clear and return to spectrum analyzer mode (steps 200 and 202 in Figure 6).

As a result, the microcomputer 26 makes a YES determination in step 152 of FIG. 5, and the original spectrum analyzer display control is performed.

When you want to return the glyco characteristics to the original flat characteristics,
After turning on the /S key to enter Glyco mode (steps 200 and 202 in Fig. 6), the first band (“I”)
Step 212~
216, 210), turn on the G/S key again to enter spectrum analyzer mode (steps 200, 202).

In this state, when the user turns on the pass boost key of the key operation section 18 in order to raise the low frequency range, the microcomputer 16 generates a key interrupt, shifts to the flow shown in FIG. 4, and sets the flag BB (steps 100 to 104). ),
The engine control circuit 14 is controlled to boost the bass (step 106).

As a result, the audio signal has the first band and the second band +
The level is raised by 8dB.

When the key interrupt processing is completed and the flow returns to the flow shown in FIG.
When g+ is scanned and YES is determined in step 52, the flag BB is set, so the switch SW is switched to the a side (steps 54 and 66).

Therefore, the first band is set to the red display mode, and for example, when the segment drive lines S, ~S& are driven, -2 dB
The following red segment 32A lights up.

Subsequently, when the scanning line g of the second band is scanned, the switch SW remains on the a side, so the red segment 32A
is lit.

When the scanning line g of the third band is scanned, the microcomputer 16 determines YES in step 68 of FIG. 3, and switches the switch SW to the b side (step 58
).

Therefore, spectrum analyzer display is performed in the green display mode from the third band to the ninth band, and when the display returns to the first band, the red display mode is selected again.

In this way, when a path boost operation is performed, the microcomputer 16 changes the display mode from green to red for the first and second bands that have been path boosted. It can be seen that the path boost is applied in the first band and the second band (see Fig. 8 (3)).

Therefore, by varying the Glyco characteristic, the third part of the overall frequency characteristic of the control amplifier 10 and the Glyco 20 with spectrum analyzer is adjusted.
If you want to raise the low range below the band by about +10dB, raise the first and second bands a little,
By greatly increasing the third band, it is possible to almost match the desired characteristics.

For example, the Glyco circuit 22 increases the first band and the second band by +2.
dB, to raise the third band by +1 odB, first turn on the G/S key on the second key operation section to set the Glyco mode. Then, in the flow of FIG. 5, NO is returned at step 152.
I judge that. If currently i=1, since L[l'-0, the seventh segment drive line S corresponding to gd,=0
? Steps 174-178), scan line g
1 (step 164), the microcomputer 16 sets the switch SW to the a side (the third
In step 52.54.66 of the figure, the OdB red segment 32A of the first band is lit.

After waiting for a certain period of time, microcomputer 26! =2
Steps 166-170), Step 152
Returning to the side, drive g (h is also 0, so segment drive line S, steps 174-178), and when scanning line g2 (step 164), the microcomputer 16 leaves the switch SW on the a side, so Second
The OdB red segment 32A of the band lights up.

Next, the microcomputer 26 sets i-3, and since gd is 0, it drives the segment drive line S again, and scans the scanning line g.
, the microcomputer 16 sets the switch SW to the b side, so the OdB green segment 32B of the third band lights up (step 68.5 in FIG. 3).
.

Below, the green segment 32A of OdB is sequentially shown up to the 9th band.
lights up, and when the scanning of the 9th band is completed, it returns to the 1st band side.

As a result, a flat glyco characteristic is displayed on the FL tube display 30, and the microcomputer 16 changes the display mode from green to red for the first and second bands, so the user only needs to look at the glyco characteristic display. It can be seen that a pass boost is applied in the first band and the second band on the control amplifier 10 side (see (4) in FIG. 8).

In this state, the user presses the key operation unit 28 to select the first band (f,).
When the up key related to 1 is turned on once, the microcomputer 26 controls the glycocircuit 22 to raise the first band to +2 dB (steps 204 to 6 in FIG. 6).
210).

Returning to the flow of FIG. 5, step 17 at i=1
In the process of 8, the segment drive line S, based on gd,=+2,
The first band is +2dB red segment 3.
2A lights up.

Similarly, when the up key related to the second band (ft) of the key operation unit 28 is turned on once, the microcomputer 2
6 also raises the second band to +2 dB (steps 204 to 210 in FIG. 6).

In the second band of the FL tube display 30, a +2 dB red segment 32A lights up.

When the Atsuf key related to the '1j43 band (f,) of the key operation unit 28 is turned on five times, the microcomputer 26
raises the third band to +10 dB, and accordingly, a green segment of +10 dB lights up in the third band.

As a result, the overall frequency characteristics including the control amplifier 10 and the spectrum analyzer-equipped Glyco 20 are raised by +10 dB from the first band to the third band, and the characteristics desired by the user are obtained (see FIG. 8 (5)).

After completing the Glyco characteristic variable operation, turn on the G/S key to return to spectrum analyzer mode.

After that, when you want to cancel the pass boost, press the key operation section 18.
When the pass boost key is turned on, the microcomputer 16 determines YES in step 100 of FIG.
is 1, so it is cleared and the tone control circuit 14 is controlled to cancel the pass boost to flatten the first band and the second band (steps 102, 108, 110).
).

As a result, when the scanning line g is scanned and YES is determined at step 52 in FIG. 3, since BB=O1BC-0, the switch SW is set to the b side, so the first and second bands are displayed in green. Return to mode (steps 54-58).

When the user turns on the pass cut key to lower the low frequency range in the pass boost state or in the pass boost release state, the microcomputer 16 selects Y in step 112 of FIG.
Judging as ES, BC= O, so BC= 1, BB=
Then, in steps 114 and 116), hash cut control is applied to the tone control circuit 14 to lower the first and second bands to -8 dB (step 118).

As a result, when scanning lines g and g2 are scanned, BB=
0, BC=1, the microcomputer 16 sets the switch SW to the C side and changes the first and second bands to yellow display mode (steps 52 to 56 and 70 in FIG. 3).
). The third and subsequent bands remain green (step 68.5).
8).

Therefore, since the first band and the second band of the spectrum analyzer display are made by lighting the yellow segment 32C, the user can understand that they are cut off.

In addition, when the treble boost key of the key operation unit 18 is turned on to raise the high frequency range, the microcomputer 16 determines YES in step 120 of FIG.
Since B=0, TB=1 and TC=O, and treble boost control is performed on the tone control circuit 14 to raise the eighth and ninth bands by +8 dB (steps 122 to 126).

As a result, when scanning lines g and g are scanned, TB=
1, the microcomputer 16 sets the switch SW to the a side and changes the eighth and ninth bands to red display mode (steps 60, 62, and 72 in FIG. 3).

Therefore, since the 8th and 9th bands of the spectrum analyzer display are displayed by lighting the red segment (32A), the user knows that these bands have been boosted by the tone control (see FIG. 8 (6)).

In this state, when the user turns on the treble cut key of the key operation unit 18 in order to lower the high frequency range, the microcomputer 16 determines YES in step 128 of FIG. 4, and since TC=O, TC=1.7B. = 0, and performs treble cut control on the tone control circuit 14 to lower the eighth and ninth bands to -8 dB (steps 130 to 134).

As a result, when scanning lines g and g are scanned, TB=
0 and TC=1, the microcomputer 16 sets the switch SW to the C side and changes the eighth and ninth bands to yellow display mode (steps 60 to 64.74). Therefore, since the eighth and ninth bands of the spectrum analyzer display are displayed by lighting the yellow segment 32C, the user knows that these bands are being cut by the tone control.

When the loudness key of the key operation unit I8 is turned on to apply the loudness, the microcomputer 16 generates a key interrupt, determines YES at step 136 in FIG. 4, and performs loudness on control on the loudness control circuit 12. , the first band and the second band are each +6d.
B, and the eighth and ninth bands are raised by +4 dB (steps 138 and 140).

Then, reverse the LD and set it to 1, and use the Glico 20 with a spectrum analyzer.
The flag data LD is output to the microcomputer 26 via the data line (steps 142 and 144).
.

The microcomputer 26 which has input Ll) from the control amplifier 10 side moves to the data input interrupt flow shown in FIG.
Rewrite the RAM LD with D (step 250)
, here LD' is assumed to be l.

Then, the process returns to the flow shown in FIG. 5, and if YES is determined in step 158 in the state of i x l, then step 16 is performed.
0 is YES, so for example, when FD+=4, the microcomputer 26 drives the segment drive lines S, ~srx from the 5th to the 13th set (step 180).
), scanning line g+ is scanned (step 164).

When the scanning line g1 is scanned, since BB=O5BC-1, the microcomputer 16 switches the switch SW to C (steps 52, 54, and 66 in FIG. 3).

Therefore, the first band is turned off from -12 to -6 dB, and the yellow segment 32C is turned on at -4 dB or higher.

That is, in the spectrum analyzer display of the first band, the unlit segments and the lit segments are reversed. However, the signal level of the first band can be determined by the height of the unlit segment.

Step 15B also occurs when the microcomputer 26 sets i to 2 and performs spectrum analyzer display processing regarding the second band.
160 is YES, so for example FD.

-8, segment drive line S from 9 sets to 13 sets
, ~sex (step 180), and scan line g
t is scanned (step 164).

When the scanning line gt is scanned, the microcomputer 1
6, the switch SW is kept switched to C.

Therefore, the second band is turned off from -12 to +2 dB, and the yellow segment 32C is turned on at +4 dB or higher.

When the microcomputer 26 sets i to 3 to 7 and performs spectrum analyzer display processing for the third to seventh bands, the answer at step 158 is NO, so the on segment and the off segment are not reversed, and in this case, the microcomputer 16 side Since the switch SW is switched to the b side, the third to seventh bands remain in the green display mode (step 68.58 in FIG. 3).

When the microcomputer 26 sets i to 8 and performs spectrum analyzer display processing regarding the 8th band, step 158.16
0 means YES, so for example, when PDs is -7, 8
The segment drive lines 58 to s1 from group 1 to group 13 are driven (step 180), and scanning line g is scanned (step 164).

scanning! When iA g m is scanned, TB=O1TC=
1, the microcomputer 16 switches the switch SW to the C side (steps 60, 62, and 72 in Fig. 3).
).

Therefore, the 8th band is turned off from group 1 to group 7 of FDI, and segments 32C above +2 dB are yellow.
will be lit.

Similarly, for the ninth band, groups 1 to FDI are turned off, and FDq + 1 or more groups are turned on in the yellow segment 32C.

In this way, the loudness band is displayed as a spectrum analyzer with the lights turned off and on, so the user can see that the 1st, 2nd, 8th, and 9th bands are being boosted by the loudness. Also, since the yellow display color indicates that there is a hash cut and a treble cut, it is easy to understand the frequency characteristic change state on the control amplifier 10 side, and the frequency characteristic change operation can be performed on the GRAICO 20 side with a spectrum analyzer. If this is done, the overall frequency characteristics of the control amplifier 10 and the GLICO 20 with spectrum analyzer can be easily set to the desired characteristics (FIG. 9 (1)).

If the G/S key is turned on to enter the Glyco mode, the microcomputer 26 sets the flag G/S to 1 (steps 200 and 202 in FIG. 6), and then returns NO in step 152 in FIG. If 1=1, after determining YES in steps 174 and 176, gd,=
+2, so drive the segment drive lines S, ~S, and S, ~S corresponding to levels other than +2dB.Step 18
2) - Drive scanning line g+ (step 164)
.

When scanning * g + is driven, microcomputer 1
6 switches the switch SW to the C side, so that in the first band, the yellow segment 32C other than +2 dB is lit.

Similarly, the second band, the eighth band, and the ninth band are also gdz.

The yellow segments 32C other than the level indicated by g(L, gd) are lit, and the third to seventh bands are at gdx to g
d, the green segment 32B is lit.

For this reason, the Glyco characteristic is displayed with the loudness-applied bands inverted and turned off, allowing the user to see that the first, second, eighth, and ninth bands have been boosted by the loudness. , You can also see that there are pass cuts and treble cuts by the yellow display color (
Figure 9 (2)).

When the loudness key of the key operation unit 18 is turned on in order to turn off the loudness, the microcomputer 16 determines YES in step 136 of FIG. 4, and since LD is 1, the loudness control circuit 12 Perform loudness off control to return to flat characteristics (steps 138 and 146), turn the LD to O, and output the LD to the microcomputer 26 (steps 142 and 144).
).

When the microcomputer 26 inputs the flag data LD, it generates an interrupt, and in step 250 of FIG.
, so during the processing of the flow in Figure 5, i=
1.2.8.9, the answer is YES in step 174, but the answer is NO in step 176, so the 1st. The second band is lit by +2dB, and the 8th band is lit by +2dB. The ninth band will be lit by OdB (step 182).

According to this embodiment, each level of each band of the FL tube display 30 is divided into three segments 32A, 32B of red, green, and yellow.
32C, each band can be displayed independently in one color by switching the switch SW, and the microcomputer 16 performs switching control B for the switch SW in response to the tone control operation in the control amplifier 10. When the frequency characteristics are changed from flat characteristics by tone control operation, PL tube display 30
By changing the display mode (display color in this case) between the band changed by tone control and other bands in the spectrum analyzer display and glyco characteristics display displayed on the spectrum analyzer display and glyco characteristics display, users can Just by looking at the display, you can easily grasp the current tone control status and the band changed by the tone control. When changing the Glyco characteristics, you can easily check the total frequency of the control amplifier 10 and Glyco 20 with spectrum analyzer. Characteristics can now be matched to desired characteristics.

Also, according to the flag data LD output from the microcomputer 16 in response to the loudness operation in the control amplifier 10, the FL tube display 30 displays when the microcomputer 26 performs a loudness control operation to change the frequency characteristic from a flat characteristic. Among the spectrum analyzer display and graphic display that are displayed, the display mode of the band changed by loudness control and other bands (in this case, the inversion of lit segments and unlit segments) can be changed, allowing users to Just by looking at the Glyco characteristic display, you can easily grasp the current presence or absence of loudness control and the band that has been changed by the loudness control. It becomes possible to match the overall frequency characteristic with the desired characteristic.

Next, a second embodiment of the present invention will be described based on FIG. 10.

FIG. 10 is a block diagram showing an audio device according to the present invention.

Note that the same components as in FIG. 1 are given the same reference numerals.

Control amplifier IOA tone control circuit 1
4A is the first one under the control of the microcomputer 16A.
The gain is varied in 2 dB steps within a +8 dB range for the band, second band, eighth band, and ninth band.

Each time the bass boost key of the key operation unit 18 is turned on, the first band and the second band are stepped up by 2 dB, and each time the bass cut key is turned on, they are stepped down by 2 dB.

Also, every time the treble boost key is turned on, the 8th
The 9th band is stepped up by 2 dB, and stepped down by 2 dB each time the treble cut key is turned on.

The microcomputer 16A is a CPU connected to a bus.
, ROM, and RAM, and tone control times according to key operations based on a predetermined program stored in the ROM! Perform variable frequency characteristic control for 14A,
Data output terminal [1-OUT] outputs pass control data or treble control data in response to key operations.
It has a function of outputting from ' to the data input terminal D-IN' of the GRAICO 20A with spectrum analyzer via the data line.

The RAM of the microcomputer 16A is provided with an area for storing bus control data 8D and treble control data TO.

As shown in FIG. 11, the F L tube display 30A installed in the Glyco 2OA with spectrum analyzer is composed of two segments 32A and 32B for each level of each band, red and green. The segment 32B is connected to the microcomputer 26 via the segment drive line Sl""5lff.
is connected to.

Ff, the grids G, -G of each band of the tube display 3OA are connected to the microcomputer 26 via scanning lines gI-gq.

The red segment 32A of the FL tube display 30A is connected to a change amount display control circuit 40 as change amount display control means via segment drive lines m, -m.

This change amount display control circuit 40 includes a grid signal line g+
-gy, gs, and gq are also connected.

In this embodiment, the change amount display control circuit 40 is composed of a one-chip microcomputer.
-IN' is connected to the tone control data output side of the microcomputer 16A.

The change amount display control circuit 40 displays the amount of frequency characteristic change in the tone control circuit 14A in response to the tone control operation on the control amplifier 10A side based on a predetermined program stored in the ROM, and displays the amount of change in frequency characteristics in the tone control circuit 14A to the corresponding value on the FL tube display 30A. We are developing the ability to perform display control simultaneously with spectrum analyzer display or Glyco characteristic display in the band.

The RAM of the change amount display control circuit 40 is provided with an area for storing bass control data BD1 and treble control data TD'.

The other constituent parts are constructed in the same manner as in FIG.

Next, the operation of the second embodiment will be explained with reference to the flowcharts in FIGS. 12 to 14 and the display state diagram in FIG. 15.

FIG. 12 shows the operation of the microcomputer 16A,
13 and 14 show the operation of the change amount display control circuit 40. FIG.

The operation of the microcomputer 26 is the same as shown in FIGS. 5 to 7.

Note that LD stored in the RAM of the microcomputer 16A, BD' and TD' stored in the RAM of the change amount display control circuit 40, and LD, gd, to gdq stored in the RAM of the microcomputer 26 are all set to 0. It is assumed that

When the power switch of the control amplifier IOA is turned on, the microcomputer 16A performs a predetermined initial setting process, sets BD and 1 to 0, and refers to these tone control booters to control circuits 1 to 7. The loudness control circuit 12 performs control of 14A to achieve flat characteristics for both bass and treble, and also refers to the LD.
Loudness off control is performed on the signal to give it a flat characteristic (step 300 in FIG. 12).

Then, wait for a key operation on the key operation unit 18 (step 3).
02-310).

On the other hand, when the NB switch of GLYCO 2OA with spectrum analyzer is turned on, the microcomputer 26 performs a predetermined initial setting process, sets G/S = 01i = 1, and sets gd, to gd.
After performing the initial setting control of the Glyco circuit 22 based on (Step E50 in FIG. 5), since G/S=0, input fd+ from the spectrum analyzer circuit 24 and convert it to FD (Steps 152 to 156). Since LD' is -0, for example, when FDI=5, the segment drive lines g and -s5 are driven (steps 158 to 162), and the scanning line g1 is driven (step 164).

Segment drive line s+-s+3 directly connects to FL tube display 30
Since it is connected to the green segment 32B of A, the -12 to -4 dB green segment 32B of the first band lights up.

After waiting for a certain period of time, the microcomputer 26 reads i=
2 (steps 166 to 170), and performs similar spectrum analyzer display processing for the second band (steps 152 to 164).
), similar processing is performed for the third and subsequent bands.

When the scanning line g is scanned, the change amount display control circuit 40 determines YES in step 350 of FIG. 13, and determines whether BD' is not 0 (step 352).

In this case, the answer is NO, so all segment drive lines m, .about.m+i are not driven (step 354).

This state continues until the scanning of the scanning line g is completed, and when the scanning line g is scanned, it is judged as YES in step 356,
Determine whether D′ is not 0 (step 362);
In this case, the answer is No, so all segment drive lines m, to m are left undriven.

This state continues until scanning of scanning line g is completed, and when scanning line g is scanned, YES is again determined in step 350.

After repeating the same process, control amplifier IOA
When the frequency characteristic is not changed from the flat characteristic by the tone control, the red segment 32A of any band of the FL tube display 30A is not lit (see FIG. 15 (1)).

Even if the user turns on the G/S key to change to the glyco mode, the red segment 32A will not be lit in the same way as when BD' and TD' are 0.

Therefore, since only the green spectrum analyzer display or Glyco characteristic display is displayed on the FL tube display 30A, the user can know that tone control is not being performed on the control amplifier IOA side, and if the user wants to set the overall frequency characteristic to the desired characteristic, It can be seen that it is sufficient to set only the glyco property as the desired property.

When the GRAICO 2OA with spectrum analyzer is in the spectrum analyzer mode, when the Hass Boost key is turned on once to slightly raise the low frequency range on the control amplifier IOA side, the microcomputer 16A determines YES in step 302 of FIG. B (set l to +2 and step 312)
Based on this BD, variable bass control is performed on the tone control circuit 14A to set both the first band and the second band to +2 dB (step 314).

Then connect the BD to the Glico 20 with a spectrum analyzer via the data line.
Output to the change amount display control circuit 40 of A (step 31
G).

The change amount display control circuit 40 that receives the BD generates a data input interrupt, determines YES at step 400 in FIG. 14, and rewrites BD' in the RAM with the input BD (
Step 402).

Therefore, when the scanning line g1 is driven and YES is determined in step 350 of FIG. 13, YES is subsequently determined as BD"≠0, so the segment corresponding to the level from 0 to BD'-+2 dB Drive line m.

and ml (step 352 = 358)
.

This state continues until the scanning of scanning line g2 is completed,
When the driving of the scanning line g starts, the change amount display control circuit 4
0 is determined as YES in step 360, and all segments are driven t! Stop driving m+ to m11 (step 354
).

Therefore, the 0 and +2 dB red segments 32A are lit in the first band and the second band at the same time as the spectrum analyzer display.

When the user turns on the pass boost key of the key operation unit 18 again, the microcomputer 16A
Under this control, the gains of the first band and the second band in the tone control circuit 14A are set to +4 dB, and the BD changed to +4 is output to the GRAICO 20A side with a spectrum analyzer.

The change amount display control circuit 40 that inputs this 80 generates an interrupt and rewrites BD' to 4 (steps 400 and 402 in FIG. 14), so the flow returns to the flow in FIG. 13 and it is determined whether the scanning line g+ has been scanned. When it is determined YES (step 350), the segment drive lines m7 to m corresponding to the level J of 0 to +4 dB are driven (step 352).
．． 358).

Therefore, the red segment 32A of 0 to +4 dB lights up in the first band and the second band at the same time as the spectrum analyzer display (see FIG. 15 (2)).

Conversely, from this state, in order to slightly lower the low frequency range on the control amplifier IOA side, press the bass cut key on the key operation section 18 to 1.
When the tone control circuit 14A is turned on twice, the gains of the first and second bands in the tone control circuit 14A return to +2 dB (steps 304, 318, 314 and 316 in FIG. 12), and the FL
The red segments 32A of the first and second bands of the tube display 30A are lit only at O and +2 dB (steps 400 and 402 in Fig. 14, step 350 in Fig. 13).
, 325, 358) Furthermore, when the bass cut key is turned on once, the first band and the second band in the tone control circuit 14A become flat, and the red segment 32A of the FL tube display 30A is completely turned off.

When the bass cut key is turned on one more time, the gains of the first and second bands in the tone control circuit 14A are set to 12.
dB, and the lighting of the red segment 32A of the first band and second band of the FL tube display 30A becomes 0 and -2 dB.

In this way, when the frequency characteristic is changed from flat by the hash control operation on the control amplifier IOA side, the F
The change amount is displayed in red, which is different from the spectrum analyzer display, at the same time as the green spectrum analyzer is displayed in the corresponding band on the L tube display 30A, so the user can select the first band by bus control from the red display on the FL tube display 30A. 2nd band 12d
You can know that it has been lowered to B, for example, the first
If you want to have an overall frequency characteristic with the band lowered to about 4 dB, it turns out that you only need to turn on the down key for the first band (fl) on the key operation unit 28 once. This means that you can do this.

Similarly, when the treble boost key is turned on once to boost the high range on the control amplifier IOA side, the gains of the 8th and 9th bands in the tone control circuit 14A increase to +2 dB (step 306 in FIG. 12).
320 to 324), the O and +2 dB red segments 32A of the 8th band and 9th band of the FL tube display 30A are lit (step 404.406 in FIG. 14, step 356.362.364 in FIG. 13).

(Refer to Fig. 15 (3)), conversely, when the treble cut key is turned on once, the tone control circuit 14A
The gain of the band and the 9th band becomes OdB (steps 308, 326, 322, 324 in FIG. 12), and the red segment 32A of the FL tube display 30A turns off (
Steps 404.406 in FIG. 14 and Steps 350 to 354.356.362 in FIG. 13).

When the treble cut key is turned on one more time, the gain of the 8th band and 9th band in the tone control circuit 14A becomes -2 dB, and the gain of the 8th band and 9th band of the FL tube display 30A becomes 2 dB.
The red segment 32A of the band lights up at 0 and -2 dB (see FIG. 15 (4)).

Therefore, the amount of change made by the treble control operation on the control amplifier IOA side is displayed in the corresponding band of the PL tube display 30A at the same time as the spectrum analyzer display, in red color different from the spectrum analyzer display.
From the red display at A, it is possible to know which band has been changed and to what extent by the treble control, making it easy to accurately set the overall frequency characteristic to the desired characteristic.

The amount of frequency characteristic change on the control amplifier IOA side by lighting the red segment 32A is displayed in the same way during the glyco characteristic display in the glyco mode.

According to this embodiment, each level of each band of the FL tube display 30A is composed of two segments 32A and 32B of red and green, and the green segment 32B is controlled by the microcomputer 26 to display spectrum analyzer or glyco characteristics. While being used for display, the current tone control data is output from the microcomputer 1.6A to the change amount display control circuit 40 on the GLYCO 20A side with a spectrum analyzer in response to the tone control operation in the control amplifier IOA, and the change amount display control circuit 40 When the frequency characteristic is changed from a flat characteristic by the tone control operation, the red segment 32A of the corresponding band of the FL tube display 30A is driven, and the amount of change changed by the tone control is displayed on the spectrum analyzer display or the glyco characteristic display. By controlling the display simultaneously with the FL tube display 30A, the user can easily grasp the presence or absence of the current tone control, the band changed by the tone control, and the amount of change, and the When trying to change the overall frequency characteristic to a desired characteristic by changing the characteristic, it becomes possible to do so easily and accurately.

Note that in the second embodiment described above, the bass control (treble control) was explained for the case where the iK1 band [and the second band (8th band and 9th band)] are always at the same gain, but it is assumed that the bass control (treble control) is always done at the same gain. Even in the case where the bass control data (treble control data) is output for each band to the GLICO side with a bass analyzer, the change amount display control circuit controls the display of the change amount for each band, and the FL
1st band and 2nd band (8th band and 9th band) of tube indicator
What is necessary is to display different amounts of change.

Furthermore, in the first and second embodiments, the control amplifier is connected to the front stage and the GRAICO with spectrum analyzer is connected to the rear stage, but the configuration may be reversed, or the control amplifier and GRAICO with spectrum analyzer may be connected separately. However, it may also be integrated.

In addition to the control amplifier, the frequency characteristic changing means may also be a tuner, tape deck, CD player, etc. having a frequency characteristic changing function other than GRACO, such as a main amplifier, tone control function, and loudness function.

Further, although an FL tube display is used as a frequency characteristic display means, other display devices such as an LCD display, an LED display, or a monitor television may be used.

〔Effect of the invention〕

According to the audio device of the present invention, in response to the operation of the frequency characteristic change operation means of the frequency characteristic change device, the frequency characteristic displayed by the frequency characteristic display means is changed by the frequency characteristic change operation means. By providing a display mode partial change means for changing the display mode with other bands, the user can easily change the current frequency characteristics in the frequency characteristics changing device by simply looking at the frequency spectrum display or graphic equalizer characteristics display. It is possible to grasp the presence or absence of the frequency band and the changed band, and when changing the graphic equalizer characteristics, it becomes possible to easily match the overall frequency characteristics of the entire audio device to the desired characteristics.

According to another audio device of the present invention, instead of the display mode partial change means, the frequency characteristic change operation means of the frequency characteristic display means is operated in response to the operation of the frequency characteristic change operation means of the frequency characteristic change device. In the band to be changed,
A frequency characteristic change amount display control means for simultaneously displaying the frequency characteristic display of the frequency spectrum of the audio signal or the graphic equalizer characteristic and the change amount in the frequency characteristic changing device is provided, so that the user can display the frequency spectrum display or the graphic equalizer characteristic. By looking at the frequency characteristic change amount display that is displayed at the same time, you can easily understand whether or not the frequency characteristic has been changed at the frequency characteristic changing device, the changed band, and the amount of change, and change the graphic equalizer characteristics. At the same time, it becomes possible to easily and accurately match the overall frequency characteristics of the entire audio device to the desired characteristics.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an audio device according to a first embodiment of the present invention, FIG. 2 is a block diagram showing the specific configuration of the FL tube display in FIG. 1, and FIGS. 3 and 4. is a flow chart showing the operation of the microcomputer of the control amplifier in FIG. 1, and FIGS. 5 to 7 are flow charts showing the operation of the microcomputer of the spectrum analyzer f=f'j rough equalizer in FIG. 8
9 and 9 are explanatory diagrams of display states, FIG. 10 is a block diagram of an audio device according to a second embodiment of the present invention, and FIG.
The figure is a block diagram showing the specific structure of the FL tube display in Fig. 10, Fig. 12 is a flowchart showing the operation of the microcomputer of the control amplifier in Fig.
3 and 14 are flowcharts showing the operation of the change amount display control circuit of the graphic equalizer with spectrum analyzer in FIG. 10, and FIG. 15 is a diagram explaining the display state. Explanation of main symbols 10, IOA: Control amplifier, 12: Loudness control circuit, 14.14A: Tone control circuit, 16.16
A, 26: Microcomputer, 18.28: Key operation section, 20. 20A graphic equalizer with spectrum analyzer, 30.30A: FL tube display, 40: Change amount display control circuit, SW: Display mode changeover switch.

Claims (2)

[Claims] (1) a graphic equalizer with a spectrum analyzer having a frequency characteristic display means for displaying the frequency spectrum of an audio signal or a frequency characteristic of a graphic equalizer characteristic; and a frequency characteristic changing operation means for changing a frequency characteristic other than the graphic equalizer; An audio device comprising: a frequency characteristic changing device that has a frequency characteristic changing device that changes the frequency characteristic of an audio signal in accordance with an operation with the frequency characteristic changing operating device; Accordingly, among the frequency characteristics displayed by the frequency characteristics display means,
An audio device comprising display mode partial change means for changing a display mode between a band changed by operating a frequency characteristic change operation means and another band. (2) Instead of the display mode partial change means, in response to the operation of the frequency characteristic change operation means of the frequency characteristic change device, the audio signal is changed to the band changed by the operation of the frequency characteristic change operation means of the frequency characteristic display means. 2. The audio device according to claim 1, further comprising change amount display control means for displaying the amount of change in the frequency characteristic changing device at the same time as displaying the frequency characteristic of the frequency spectrum or the graphic equalizer characteristic.