JP2003348684A - Cascade connection mixer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cascade-connected mixer capable of an output with the same delay even when receiving an input from any input terminal in the cascade-connected mixer. <P>SOLUTION: This invention provides the cascade-connected mixer wherein all output signals from a second digital mixer are outputted to a first digital mixer, and a delay resulting from summing an input of the first digital mixer and cascade outputs of the second digital mixer is set to the same value as a total delay in the second digital mixer. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cascade-connected mixer device, and more particularly, to a cascade-connected mixer device such that at least one output signal of a digital mixer is cascaded to another digital mixer.

[0002]

2. Description of the Related Art A method of increasing the number of inputs by cascading a plurality of digital mixers has been known. For example, as shown in FIG. 8, a second digital mixer having the same configuration is cascade-connected to a 2-input / 2-output first digital mixer which is a cascade master.
The number of input terminals can be doubled, for example, as a whole of the mixer device.

A first digital mixer (MASTER) 7
Reference numeral 00 denotes two input terminals IN1 and IN2 for inputting outputs from two sound sources, and input terminals IN1 and IN2.
And cascade input terminals CASIN1 and CASI for cascade-inputting the output from the second digital mixer 800 to the channel boards 710 and 720 for performing predetermined processing on the audio signal from the audio output source input through the
N2, each input adjusted by the channel boards 710 and 720, and the cascade input terminals CASIN1 and CASIN2.
Buses BUS1 and BUS2 for adding the output signal of the second digital mixer 800 input from the first and second mixers 730 and 740 for performing predetermined processing on the added buses BUS1 and BUS2; It comprises output terminals OUT1 and OUT2 for outputting to an output device.

At this time, in the first digital mixer 700, a delay due to calculation occurs due to signal processing. For example, the delay amount of the channel substrate (CH1) 710 for processing the signal input from the input terminal IN1 and the delay amount of the channel substrate (CH2) 720 for processing the signal input from the input terminal IN2 are the same (D
LY = A). Also, the delay amount of the mix board 730 for processing the signal added by the bus BUS1 and the mix board 74 for processing the signal added by the bus BUS2.
The delay amount of 0 is the same (DLY = B).

[0005] Second digital mixer (SUB) 800
Are two input terminals IN3 and IN4 for inputting outputs from two sound sources, and a channel for performing predetermined processing on an audio signal from an audio output source input through each of the input terminals IN3 and IN4. Boards 810, 820, buses BUS3, BUS4 for adding the respective inputs adjusted by the channel boards 810, 820, and buses BUS3,
Mix board 83 that performs a predetermined process on BUS4
0, 840 and a cascade output terminal CASOU for outputting the processed signal to the first digital mixer 700.
T1, CASOUT2, output terminals OUT3, OUT4, etc. for outputting the processed signal to an output device. The signal output from the cascade output terminal CASOUT1 is connected to the bus BUS of the first digital mixer.
1, the cascade output terminal CASOUT2
Are added to the processed input signal of the first digital mixer 700 on the bus BUS2 of the first digital mixer 700,
At 30 and 740, predetermined processing is performed and output to an output device (OUT1, OUT2).

[0006] At this time, also in the second digital mixer 800, a delay due to calculation occurs due to signal processing. The delay amount of the channel substrate (CH3) 810 for processing the signal input from the input terminal IN3 and the delay amount of the channel substrate (CH4) 820 for processing the signal input from the input terminal IN4 are the same (= A). is there. Further, the delay amount of the mix board 830 that processes the signal added by the bus BUS3 and the delay amount of the mix board 840 that processes the signal added by the bus BUS4 are the same (= B).

As described above, in addition to the two inputs of the first digital mixer, the two inputs of the second digital mixer are further added from the dedicated input (cascade input terminal) and processed, so that the entire mixer device is processed. The number of input terminals can be increased.

[0008]

However, in the above cascade-connected mixer device, the amount of delay required for processing the signal input from the input terminal of the first digital mixer and the amount of delay from the input terminal of the second digital mixer are reduced. There is a problem that it differs depending on the delay amount of the input signal.

For example, in the above example, the signals input from the input terminals IN1 and IN2 of the first digital mixer 700 are output to the output terminal OUT of the first digital mixer 700.
1 and OUT2, the channel substrate 7
Since the delay amount A due to the processing at 10, 720 and the delay amount B due to the processing at the mix substrates 730, 740 occur, the total delay amount is A + B.

On the other hand, when signals input from the input terminals IN3 and IN4 of the second digital mixer 800 are output from the output terminals OUT1 and OUT2 of the first digital mixer 700, the signals from the second digital mixer 800 Until the input is cascaded, the channel substrates 810, 8
20 and the delay amount A + B due to the processing on the mix boards 830 and 840, and the delay amount due to the processing on the mix boards 730 and 740 until the cascade input is added and output by the first digital mixer 700. B occurs. Therefore, in the case of a signal input from the second digital mixer, the total delay amount is A +
2B.

As described above, since the input signal from the second digital mixer is delayed from the input signal from the first digital mixer, the synthesized signal is distorted and the sound changes, and a desired sound cannot be obtained. There is a problem.

Further, there is a problem that the maximum delay path of the cascade-connected mixer device exceeds the processing delay amount of a single digital mixer.

Therefore, an object of the present invention is to provide a mixer device cascaded such that at least one output signal of a digital mixer is cascaded to another digital mixer, and an input signal from an arbitrary input terminal can be supplied to the same delay terminal. It is an object of the present invention to provide a new and improved cascaded mixer device capable of outputting a quantity.

[0014]

In order to solve the above problems, according to a first aspect of the present invention, a cascade connection is performed such that all output signals of the second digital mixer are input to the first digital mixer. Mixer device,
In the first digital mixer, the delay amount from the input of the first digital mixer to the addition of the cascade input of the second digital mixer is a total delay amount from the input to the cascade output of the second digital mixer. A cascade connection mixer device, wherein

According to the invention described above, in a mixer device cascaded so that all output signals are output to the first digital mixer in order to increase the number of input terminals,
An input signal from an arbitrary input terminal can be output with the same delay amount. Since the delay amount is corrected as described above, a suitable audio output can be obtained. Further, when a single digital mixer is used, signals can be processed with a minimum required input / output delay amount.

The delay amount from the input of the first digital mixer to the addition of the cascade output of the second digital mixer is a predetermined amount with respect to a signal input from each input terminal of the first digital mixer. Are respectively set by the channel substrates for performing the above processing.

In order to solve the above problem, in a second aspect of the present invention, at least one of the second digital mixers is provided.
A cascaded mixer device cascaded so that two output signals are input to a first digital mixer, and at least one output signal of the second digital mixer can be directly output from the second digital mixer. In the first digital mixer, the amount of delay from the input of the first digital mixer to the addition of the cascade input of the second digital mixer is the sum of the delay from the input to the cascade output of the second digital mixer. The delay amount is set to the same value as the delay amount, and in the second digital mixer, the delay amount from the addition of each input of the second digital mixer to the direct output of the second digital mixer is the same as the delay amount. 2 and the delay amount from the addition of the inputs of the two digital mixers to the cascade output and the first digital mixer. Are set to the same value as the total delay amount of a delay amount until the output from the addition of the cascade input in service, cascade mixer device is provided, characterized in that.

According to the invention described above, in a mixer device cascaded so that at least one output signal is output to the first digital mixer in order to increase the number of input terminals, an input from an arbitrary input terminal is provided. Signals can be output with the same delay amount. As a result,
Since the delay is corrected, a suitable audio output can be obtained. Further, the direct output of the second digital mixer that is not cascaded can have the same delay amount.

In the first digital mixer, the delay amount from the input of the first digital mixer to the addition of the cascade input of the second digital mixer is the first digital mixer. Is set by a channel board for performing a predetermined process on a signal input from each input terminal of the digital mixer of the first embodiment, and the second digital mixer calculates the sum of the inputs of the second digital mixer. The delay amount up to the direct output of the second digital mixer can be set by a mix board for performing predetermined processing on the added input of the second digital mixer.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the present invention will be described in detail. In this specification and the drawings, components having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted.

(First Embodiment) First, an example of use of a mixer device according to a first embodiment will be described with reference to FIG. FIG. 1 is a block diagram for explaining a usage example of the mixer device according to the present embodiment.

As shown in FIG. 1, a digital mixer 20 includes a plurality of digital audio devices (for example, a microphone 12, a CD player 14, a DAT (digital audio tape recorder) 16) and the like.
The audio signal from the audio output source 10 is subjected to signal processing such as level adjustment, mixing, and frequency equalization. An output terminal of the digital mixer 20 is connected to an output device 30 such as a monitor speaker, a multi-track tape recorder, a master switcher, etc., and outputs a mixed signal subjected to predetermined processing to the output device. Is done.

Next, the internal configuration of a single digital mixer will be described with reference to FIG. 2, taking a 2-input / 2-output digital mixer as an example. In addition, various devices such as a microphone, a tape recorder, and a CD can be connected to the input terminal, and an input signal from such a device is A / D (analog / analog).
It is assumed that the input signal is unified into a digital input signal by processing such as digital conversion.

First, as shown in FIG.
1 and IN2 are input to each channel substrate 1
At steps 10 and 120, various processes such as gain adjustment by a fader operation and sound quality adjustment by an equalizer (EQ) are performed. For example, the channel substrates 110 and 12
0 can convert AES / EBU format digital audio data into 64-bit slot L / R format digital audio data, and perform processing such as equalizing and filtering on the digital audio data of each input terminal. In addition, each input terminal I
Delay amount inherent to input signals from N1 and IN2 (delay amount (DLY): A in this embodiment)
Can be set and stored in memory.

The input signals adjusted by the channel boards 110 and 120 are input to output systems called buses BUS1 and BUS2, and the signals of each input channel are added to independently generate output signals.

The added buses BUS1 and BUS2 are input to mix boards 130 and 140, respectively, and are subjected to various processes such as gain adjustment by a fader operation and sound quality adjustment by an equalizer (EQ), like the channel boards. Is done. At this time, a delay unique to each addition signal (delay amount (DLY) in the present embodiment):
B) can be set and stored in the memory.

Thereafter, the signals processed by each of the mix boards 130 and 140 are output as output signals, respectively, at an output terminal OU.
Output from T1 and OUT2 to various output devices.

In the single mixer having the above-described configuration, a delay due to calculation is generated due to signal processing, but the total delay amount is A + B. It is desirable that the amount of delay be small, and that the amount of delay between input and output at an arbitrary input terminal and output terminal be the same.

Next, an example of actual signal processing control will be described with reference to FIG. FIG. 3 is a block diagram showing a signal processing method of the digital mixer.

First, a predetermined operation is performed by an operation panel having an input device such as a fader switch, an equalizer adjustment volume, and an output device such as an LCD. A fader (fader: level adjustment) adjusts an output signal level for each channel based on position information of a fader operator on an operation panel. For example, a DSP (Digital Sign)
al Processor: digital signal processor). The equalizer (EQ) is, for example, DS
This is realized by P, for example, by IIR filter processing with characteristics set by the CPU.

The operation panel is provided with various operators such as faders, switches, and volumes. Data input from the operation panel is used to control the entire mixer device.
The data recognized by the PU is sent to the DSP. The CPU reads the operation information from the operation panel based on the program stored in the memory.
Control P. The CPU reads the status information of the operation panel via the bus. Further, the CPU reads necessary information from each DSP and writes control information such as fader information and channel selection information into the DSP and the adder.

In the DSP, predetermined processing (for example, fader processing, equalizer processing, sound effect processing, etc.) is executed on the input audio data and output. The absolute value of the amplitude of the audio data can be returned to the CPU, and the CPU can display the data as meter data on an output device. The output can be recorded on a digital tape recorder or D / A (digital / digital).
It can be used in various forms that are output as sound after analog) conversion.

Next, the configuration of the cascade-connected mixer device according to the first embodiment will be described with reference to FIG.
FIG. 4 is a block diagram illustrating a configuration of the cascade-connected mixer device according to the first embodiment.

The mixer according to the present embodiment is
A mixer device cascaded so that all output signals of the second digital mixer are output to the first digital mixer. Conventionally, when digital mixers are cascaded in order to increase the number of input terminals, there has been a problem that the amount of delay differs depending on the input terminals. In the present embodiment, unlike the related art, the delay amount of the channel substrate of the first digital mixer (master device) is set to A.
+ B is set.

First, as shown in FIG. 4, the first digital mixer 200 has two input terminals IN1 and IN2 for inputting audio signals from two sound sources, and each input terminal I
A channel substrate 210 for performing a predetermined process on an audio signal from an audio output source input through N1 and IN2;
220, cascade input terminals CASIN1 and CASIN2 for cascading output signals from the cascade-connected second digital mixer 300, input signals adjusted by the channel boards 210 and 220, and cascade input terminals CASIN1 and CASIN2. BUS1 and BUS2 for adding the output signal of the second digital mixer 300 input from the
1, a mixed substrate 2 for performing a predetermined process on BUS2
30 and 240, and output terminals OUT1 and OUT2 for outputting the processed signal to an output device.

At this time, in the first digital mixer 200, a delay due to calculation occurs due to signal processing. In this embodiment, unlike the related art, the delay amount of the channel board (CH1) 210 for processing the signal input from the input terminal IN1, and the channel board (CH2) 2 for processing the signal input from the input terminal IN2.
The 20 delay amounts (DLY) are both set at A + B. Note that the delay amount of the mix board 230 that processes the signal added by the bus BUS1 and the delay amount of the mix board 240 that processes the signal added by the bus BUS2 are the same (= B). The setting of the delay amount can be automatically or manually set when the cascade of the mixer device is configured.

On the other hand, the second digital mixer 300
Two input terminals IN3 and IN4 for inputting audio signals from the two sound sources, and a channel board 310 for performing predetermined processing on the audio signal from the audio output source input via the input terminals IN3 and IN4. , 320, the buses BUS3, BUS4 for adding the input signals adjusted by the channel boards 310, 320, and the added bus BUS
3, a mixed substrate 3 for performing predetermined processing on BUS4
30, 340 and a cascade output terminal CASO for outputting the processed signal to the first digital mixer 200.
UT1, CASOUT2, output terminals OUT3, OUT4, etc. for outputting the processed signal to an output device.

The cascade output CASOUT1 is
After being added to the processed input signal of the first digital mixer 200 on the bus BUS1 of the first digital mixer 200, the cascade output CASOUT2 is also output on the bus BUS2 of the first digital mixer 200.
After being added to the processed input signal of the digital mixer 200, the signals are subjected to predetermined processing by the mix boards 230 and 240, respectively, and output to output devices (OUT1, OUT
2).

At this time, also in the second digital mixer 300, a delay due to calculation occurs due to signal processing. The delay amount (DLY) of the channel substrate (CH3) 310 that processes the signal input from the input terminal IN3 and the delay amount (DLY) of the channel substrate (CH4) 320 that processes the signal input from the input terminal IN4 are the same (= A). In addition, the delay amount of the mix board 330 for processing the signal added by the bus BUS3 and the bus B
Mix board 340 for processing the signal added in US4
Is the same (= B) as the delay amount (DLY). The setting of the delay amount can be automatically or manually set when the cascade of the mixer device is configured.

In the cascade-connected mixer device according to the present embodiment, arbitrary input terminals IN1, IN2, IN2
3 and IN4, the amount of delay required for signal processing between input and output is the same. That is, for example, the output terminals OUT1 and OUT1 of the first digital mixer 200 input from the input terminals IN1 and IN2 of the first digital mixer 200.
When outputting from OUT2, the channel substrate 21
A delay amount A + B due to processing at 0 and 220 and a delay amount B due to processing at the mix boards 230 and 240 are generated, and the total delay amount is A + 2B.

On the other hand, when input from the input terminals IN3 and IN4 of the second digital mixer 300 and output from the output terminals OUT1 and OUT2 of the first digital mixer 200, cascade is performed from the input of the second digital mixer 300. Before output, delay amount A + B due to processing of channel substrates 310 and 320 and mix substrates 330 and 340
, And a delay amount B due to the processing in the mix boards 230 and 240 in the first digital mixer 200 is generated. Therefore, the total delay amount of the signal input from the second digital mixer is also A + 2B.

As described above, in the present embodiment, an input signal from an arbitrary input terminal can be output with the same delay amount even in a cascade-connected mixer device for increasing the number of input terminals. As a result, the delay is corrected, so that a suitable audio output can be obtained.
Further, when one digital mixer is used, a signal can be processed with a minimum required input / output delay amount.

Next, an example in which the cascade-connected mixer device according to the present embodiment is applied to a general form will be described with reference to FIG. The cascade connection mixer device described here is different from FIG. 4 only in that the delay amount of the channel substrate of the first digital mixer is C (= A + B) and the delay amount of the mix substrate is D. .

As shown in FIG. 5, the signals input from the input terminals IN1 and IN2 of the first digital mixer 200 'are output from the output terminals OUT1 and OUT1 of the first digital mixer 200'.
When output from OUT2, the total delay amount is C + D. On the other hand, the second digital mixer 300 '
Signals input from the input terminals IN3 and IN4 of the first digital mixer 200 ′ are output terminals OUT1 and OUT2 of the first digital mixer 200 ′.
If the total delay is A + B
+ D.

Therefore, in order to make the same delay amount for both, it suffices if the formula of C + D = A + B + D is satisfied. That is, by rearranging the above equation, if C = A + B, the total delay amounts input from any input terminals are all the same. This is because the first digital mixer 200 '
Means that the delay amount (C) of the channel substrates 201 ′ and 202 ′ is the total delay amount (A + B) in the processing of the second digital mixer 300 ′. Thus, if the first embodiment is described in a general form, the channel substrate 2 of the first digital mixer 200 '
If the value A + B of the total delay amount of the second digital mixer 300 'is set as the delay amounts C of 01' and 202 ', the total delay amounts of the signals input from any input terminals can be all the same. .

In other words, when a plurality of digital mixers are cascaded, the same processing is performed on all input signals in the processing after the cascade output is added. The delay amounts are the same. Therefore, the delay amount of the processing before the cascade output is added (that is, the delay amount from the input of the first digital mixer to the addition of the cascade output of the second digital mixer, and the total delay amount in the second digital mixer) And) are set to the same value, so that the total delay amount from an arbitrary input terminal can be made the same.

(Second Embodiment) Next, a configuration of a cascade-connected mixer device according to a second embodiment will be described with reference to FIG. FIG. 6 is a block diagram showing a configuration of the cascade-connected mixer device according to the second embodiment.

In the present embodiment, unlike the first embodiment, a mixer device is cascaded so that at least one output signal of the second digital mixer is output to the first digital mixer. The cascade connection mixer device according to the present embodiment is characterized in that only the output signal of the bus BUS1 is cascade-output and that the delay amount of the mix board of the second digital mixer is set to 2B in the first embodiment. Unlike the embodiment, the other basic configuration is the same. Hereinafter, only the characteristic portions will be described.

First, as shown in FIG. 6, the cascade connection mixer device according to the present embodiment differs from the first embodiment in the BU of the second digital mixer (SUB) 500.
Only the output CASOUT1 of the mix board 530 in S3 is the cascade input CA of the first digital mixer 400.
It is connected to SIN1 and is added to the bus BUS1. Therefore, the bus BUS1 of the first digital mixer
Is valid for all inputs.

Also in the case of the cascade-connected mixer device according to the present embodiment, similarly to the first embodiment, the signals input from the input terminals IN1 and IN2 of the first digital mixer 400 are transmitted to the first digital mixer 400. 400, the total delay amount when output from the output terminals OUT1 and OUT2 is A + 2B.
0 from the input terminals IN3 and IN4 of the first
Output terminals OUT1, OUT2 of the digital mixer 400 of FIG.
, The total delay amount is A + 2B, which is the same. The setting of the delay amount can be automatically or manually set at the time of cascade configuration of the digital mixer.

Further, in this embodiment, unlike the first embodiment, the signals input from the input terminals IN3 and IN4 of the second digital mixer 500 are directly output from the output terminal OUT4 of the second digital mixer 500. Can be output. Even in this case, since the delay amount 2B due to the processing on the mix board 540 of the bus BUS4 is set to occur, the channel boards 510, 5
The total delay amount is A + 2B together with the delay amount A by the processing at 20. As described above, the input of the second digital mixer 500 is connected to the second digital mixer 5.
Even when the signal is directly output from the output terminal OUT4 of 00, the delay amount can be the same as the delay amount when the signal is cascaded to the first digital mixer 400. The setting of the delay amount can be automatically or manually set at the time of cascade configuration of the digital mixer.

Next, an example in which the cascade connection mixer device according to this embodiment is applied to a general form will be described with reference to FIG. The cascade-connected mixer device described here is different from FIG. 6 in that the first digital mixer 400 ′
C (= A +
B), the delay amount of the mix boards 430 ′ and 440 ′ of the first digital mixer 400 ′ is D, and the delay amount of the mix board 540 ′ of the output of the bus BUS4 of the second digital mixer 500 ′ is E (= B + D).

As shown in FIG. 7, signals input from the input terminals IN1 and IN2 of the first digital mixer 400 'are output from the output terminals OUT1 and OUT1 of the first digital mixer 400'.
When the signal is directly output from OUT2, the total delay amount is C + D. On the other hand, the second digital mixer 50
The signals input from the input terminals IN3 and IN4 of the first digital mixer 400 'are output terminals OUT1 and O1 of the first digital mixer 400'.
When output from the UT 2, the total delay amount is A + B + D. Therefore, similarly to the first embodiment, the delay amount of the channel substrate of the first digital mixer is set to be the same as the total delay amount of the second digital mixer (that is, C = A + B). Just do it.

In this embodiment, the signals input from the input terminals IN3 and IN4 of the second digital mixer 500 'can be directly output from the output terminal OUT4 of the second digital mixer 500'. In this case (when it is not a cascade output), the delay amount is A + E. If the delay amount A + E is the same as the delay amount A + B + D, the total delay amount until the signal input from an arbitrary input terminal is finally output is the same. Therefore, A + E = A + B +
From D, it is sufficient that E = B + D holds. Therefore, if the delay amount of the mix board 540 'of the second digital mixer 500' that is not cascaded is set as B + D, the total delay amount input from any input terminal becomes the same.

That is, the input signal of the second digital mixer is subjected to the same processing until it branches into a cascade output or direct output, so that the delay amount is the same. Therefore, in the processing after branching to the cascade output and the direct output, if the delay amounts are set to be the same (that is, the sum of the inputs of the second digital mixer is added to the direct delay of the second digital mixer). The amount of delay until output is the same as the total amount of delay from the addition of the input of the second digital mixer to the cascade output and the delay from the addition of the cascade input to the output of the first digital mixer. Value), the second digital mixer can output the signal directly from the second digital mixer or the first digital mixer.
Can be output with the same delay amount even in the case of cascade output from the digital mixer of FIG.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can conceive various changes or modifications within the scope of the technical idea described in the claims, and those modifications naturally fall within the technical scope of the present invention. It is understood to belong.

For example, in the above-described embodiment, a configuration in which digital mixers having two inputs and two output terminals are cascaded has been described as an example, but the present invention is not limited to such an example. Even when a digital mixer having one or three or more input terminals or one or three or more output terminals is cascaded, the present invention can be implemented based on this principle.

In the above embodiment, an example is described in which one sub-digital mixer is cascaded to the master digital mixer, but the present invention is not limited to this example. The present invention can be implemented even when a plurality of sub-digital mixers are connected in cascade to the master digital mixer.

[0059]

According to the present invention, input signals from arbitrary input terminals can be output with the same delay amount even in a cascade-connected mixer device for increasing the number of input terminals. As a result, the delay is corrected, so that a suitable audio output can be obtained. Further, when a single digital mixer is used, signals can be processed with a minimum required input / output delay amount.

[Brief description of the drawings]

FIG. 1 is a block diagram for explaining a usage example of a mixer device according to a first embodiment.

FIG. 2 is a block diagram showing an internal configuration of a single digital mixer.

FIG. 3 is a block diagram illustrating a signal processing method of the digital mixer according to the first embodiment.

FIG. 4 is a block diagram illustrating a configuration of a cascade-connected mixer device according to the first embodiment;

FIG. 5 is a block diagram showing a general configuration of the cascade-connected mixer device according to the first embodiment;

FIG. 6 is a block diagram illustrating a configuration of a cascade-connected mixer device according to a second embodiment;

FIG. 7 is a block diagram showing a general configuration of a cascade-connected mixer device according to a second embodiment;

FIG. 8 is a block diagram showing a configuration of a conventional cascade-connected mixer device.

[Explanation of symbols]

10. Audio output source 12 microphones 14 CD player 16 DAT (Digital Audio Tape Recorder) 20 Digital mixer 30 output devices 100 digital mixer 110, 120 channel board 130,140 mixed board IN1,2,3,4 input terminal BUS1,2 bus OUT1, 2 output terminals CASIN1, 2 Cascade input terminals CASOUT1, 2 Cascade output terminals

Claims (4)

[Claims] 1. A mixer device cascaded so that all output signals of a second digital mixer are input to a first digital mixer, wherein the first digital mixer includes the first digital mixer. The delay amount from the input of the mixer to the addition of the cascade input of the second digital mixer is set to the same value as the total delay amount from the input to the cascade output of the second digital mixer. Cascade connection mixer device. 2. A delay amount from input of the first digital mixer to addition of a cascade output of the second digital mixer is a predetermined amount with respect to a signal input from each input terminal of the first digital mixer. 2. The cascade-connected mixer device according to claim 1, wherein each of the cascade-connected mixer devices is set by a channel substrate for performing the above-described processing. 3. A cascade connection wherein at least one output signal of a second digital mixer is input to a first digital mixer, and at least one output signal of the second digital mixer is connected to the second digital mixer. A cascade-connected mixer device capable of directly outputting from a digital mixer, wherein in the first digital mixer, a delay amount from an input of the first digital mixer to an addition of a cascade input of the second digital mixer is: The total delay amount from the input to the cascade output in the second digital mixer is set to the same value, and the second digital mixer calculates the second delay from the sum of the inputs of the second digital mixer. The amount of delay to the direct output of the digital mixer is calculated from the sum of the inputs of the second digital mixer. A delay amount from the addition of the cascade input to the output of the first digital mixer and a total delay amount from the addition to the output of the cascade input in the first digital mixer. 4. In the first digital mixer, a delay amount from an input of the first digital mixer to an addition of a cascade input of the second digital mixer is determined from each input terminal of the first digital mixer. The second digital mixer is set by a channel substrate for performing a predetermined process on an input signal, and is directly added to the second digital mixer by adding each input of the second digital mixer. The amount of delay to output is
Set by a mix board for performing predetermined processing on the added input of the second digital mixer;
The cascade-connected mixer device according to claim 3, wherein: