Digital mixer with multiple displays

Abstract

To provide a digital mixer capable of displaying / operating / changing a plurality of channels and a plurality of parameters at the same time.SOLUTION: A digital mixer 10 comprises: an input interface 12; a processor 14; an output interface 18; at least a first display 20 and a second display 21; and an operator 22. The operator 22 contains a mode switching button for switching between a first mode and a second mode. The processor 14 displays parameter setting screens of audio signals in different channels on the first display 20 and the second display 21 respectively when the mode switching button is set to the first mode, and displays parameter setting screens of the different audio signals in the same channel on the first display 20 and the second display 21 when the mode switching button is set to the second mode.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a digital mixer or mixing console that is equipped with multiple displays and mixes and processes audio signals. [Background technology]

[0002] A digital mixer has multiple channels and multiple parameters, and generally, the user selects one of these parameters and displays it on a single display screen for manipulation / change. For example, Displaying the input level setting screen for a channel on the display screen and operating / changing it Displaying the equalization (EQ) setting screen for a channel on the display screen and operating / changing it Displaying and changing the compressor settings for a channel on the display screen etc.

[0003] Patent Documents 1 and 2 describe a technology in an acoustic signal processing device that allows a parameter editing screen for one or two channels to be opened and switched with a simple operation from a screen that displays the parameter setting status of multiple channels.

[0004] Patent documents 3 and 4 describe a technique in which left and right displays are provided between a lower channel strip group and an upper channel strip group, and parameters of either the upper or lower channel strip group are switched and displayed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-110541 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-40964 [Patent Document 3] Japanese Patent Application Laid-Open No. 2010-226264 [Patent Document 4] Japanese Patent Application Laid-Open No. 2010-226262 Summary of the Invention [Problem to be solved by the invention]

[0006] The user operation of the digital mixer is as follows: Control the input level and equalization (EQ) at the same time -Operate equalization (EQ) and compressor at the same time - Controlling the parameters of one channel while simultaneously controlling the parameters of another channel There is a need to operate / change multiple parameters at the same time, such as:

[0007] The present invention provides a digital mixer that allows multiple channels and multiple parameters to be displayed / operated / changed simultaneously. [Means for solving the problem]

[0008] The digital mixer of the present invention includes an input interface and , out a power interface, at least a first display and a second display, and an operator. The operators include a mode switching operator for switching between a first mode and a second mode, and a channel changing operator; when the first mode is set by the mode switching operator, parameter setting screens for audio signals of different channels are displayed on the first display and the second display, respectively; when the second mode is set by the mode switching operator, different parameter setting screens for audio signals of the same channel are displayed on the first display and the second display; and when the channel is changed by the channel changing operator while the second mode is set, different parameter setting screens for audio signals of the same channel after the change are displayed on the first display and the second display; and audio signals input from the input interface are processed using parameters set based on the parameter setting screens and output from the output interface.

[0009] In one embodiment, when the first mode is set by the mode switching operator, the first display displays the status of an audio signal assigned to a certain channel strip, and the second display displays the status of another audio signal assigned to another channel strip, and when the second mode is set by the mode switching operator, the first display and the second display display the status of audio signals assigned to the same channel strip.

[0010] In another embodiment, the first mode is a normal mode, the second mode is a full-screen mode, the mode switching operator is set to the normal mode in a default state, a home screen is displayed on the first display and the second display, and when a user operation for parameter setting is performed and the mode switching operator is not operated, parameter setting screens for audio signals of different channels are displayed on the first display and the second display, respectively, and when a user operation for parameter setting is performed and the mode switching operator is operated to on, different parameter setting screens for audio signals of the same channel are displayed on the first display and the second display.

[0011] In yet another embodiment, when the mode switching operator is turned on to display different parameter setting screens for audio signals of the same channel on the first display and the second display, and either the first display or the second display returns to the home screen in response to a user operation, the other display is returned in conjunction with the home screen.

[0012] In yet another embodiment, different combinations of parameters of the same channel audio signal to be displayed on the first display and the second display in the second mode are stored in a memory.

[0013] In yet another embodiment, the memory stores the combinations of different parameters displayed on the first display and the second display in the second mode as combinations of different parameters of the same channel audio signal to be displayed on the first display and the second display in the second mode.

[0014] Furthermore In another embodiment, the mode switching The operators areThe touch buttons are displayed on the first display and the second display to display the current mode status and to enable switching between the first mode and the second mode at any timing. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a block diagram of a digital mixer. [Figure 2] FIG. 1 is an external view of a digital mixer. [Figure 3] This is a schematic diagram of one channel strip that makes up the left block. [Figure 4] FIG. 10 is a diagram showing an example of a screen of a display. [Figure 5] FIG. 10 is a diagram showing an example of a display on the display of the digital mixer when the full screen button is turned off. [Figure 6] FIG. 6 is an enlarged view of the display in FIG. 5. [Figure 7] FIG. 6 is a diagram showing an example of a display that appears when the user operates a control on the screen of FIG. 5 to switch the display screen to a parameter setting screen for an audio signal assigned to one of the channel strips in the block on the right. [Figure 8] FIG. 8 is an enlarged view of the display in FIG. 7. [Figure 9] 8 is a diagram showing an example of a display when a user turns on a full screen button displayed on the display in the state shown in FIG. 7. FIG. [Figure 10A] FIG. 10 is an enlarged view of one of the displays in FIG. 9. [Figure 10B] FIG. 10 is an enlarged view of the other display in FIG. 9. [Figure 11] FIG. 10 is a diagram showing an example of a display when a user operates a channel change button displayed at the top of the screen of the display in the state of FIG. 9. [Figure 12A] FIG. 12 is an enlarged view of one of the displays in FIG. [Figure 12B] FIG. 12 is an enlarged view of the other display in FIG. [Figure 13] 10 is a processing flowchart of a processor. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0017] 1 is a block diagram showing the configuration of a digital mixer (or mixing console) according to this embodiment. The digital mixer 10 performs various processes, such as routing, assignment, equalization, mixing, and effects, on various input audio signals and outputs the results to the outside.

[0018] The digital mixer 10 includes an input interface 12, a processor 14, a memory 16, an output interface 18, a display A 20, a display B 21, and controls 22. The controls 22 include a fader 24 and a full-screen button 26. Note that, although the present invention exemplifies two displays, namely, the display A 20 and the display B 21, as multiple displays, this is not limiting, and three or more displays may be provided as needed.

[0019] The input interface 12 includes an analog signal input terminal, a digital signal input terminal, and an ADC (analog-to-digital converter). Analog audio signals are converted into digital audio signals by the ADC and then input.

[0020] The processor 14 is configured with a CPU or the like, and performs various processes by reading and executing processing programs stored in the memory 16 .

[0021] The display A20 and the display B21 display various states of the digital mixer 10. The display A20 and the display B21 are each configured with a liquid crystal panel or an organic EL panel.

[0022] The controls 22 are switches and buttons operated by the user to perform various processes on input audio signals. The displays A20 and B21 may be configured as touch panels, and the controls 22 may be displayed on the touch panels for touch operation. Alternatively, the controls may be physical switches, buttons, knobs, or the like. The controls 22 include a fader 24 and a full-screen button 26. The fader 24 adjusts the input and output levels of audio signals assigned to a channel strip and includes linear and rotary faders. Here, a channel strip is a unit that assembles faders, knobs, switches, and the like for adjusting the audio signal of a certain channel. The full-screen button 26 is operated to display the status of the audio signal assigned to a certain channel strip on both the displays A20 and B21. The full-screen button 26 functions as a mode switching button that switches between two display modes.

[0023] In other words, when the full screen button 26 is not turned on, the display A20 displays the status of an audio signal assigned to a certain channel strip section, and the display B21 displays the status of another audio signal assigned to another channel strip section, but when the full screen button 26 is turned on, both the display A20 and the display B21 display the status of the audio signal assigned to the certain channel strip section.

[0024] The processor 14 processes the audio signal in response to the operation of a fader 24, a full screen button 26, and the like included in the controls 22. Various parameter values ​​set by operating the controls 22 are stored in a memory 16 configured by a flash memory or the like. Various signal processing operations performed by the digital mixer 10 are performed in response to the parameter values ​​stored in the memory 16.

[0025] Here, the processor 14 may include a CPU that controls the overall operation of the digital mixer 10, and a DSP that executes processing programs based on instructions from the CPU to perform input level adjustment, gate processing, equalization processing, compression processing, mixing processing, effect processing, etc. of audio signals.

[0026] The DSP connects input audio signals to input channels. The number of input channels can be any number, for example, 20 channels from ch1 to ch20. Each input channel performs level control, gating, equalizing, compression, and other processing according to set parameter values. The audio signals from each input channel are selectively output to a mix (MIX) bus, which mixes the audio signals input from the input channels. The levels of the audio signals output from the input channels to the MIX bus can be adjusted individually. The mixed audio signals are output to output channels. The number of output channels can also be any number, for example, 10 channels from MIX1 to MIX10. Each output channel performs various output-side processing according to set parameter values. The output audio signals from the output channels are output to an output interface 18.

[0027] The output interface 18 includes an analog output terminal, a digital output terminal, and a DAC (digital-to-analog converter). The processed digital audio signal is converted into an analog audio signal by the DAC and output.

[0028] FIG. 2 shows an external view of the digital mixer 10. As shown in FIG.

[0029] A plurality of vertically elongated channel strips are provided in the approximate center of the digital mixer 10. The channel strip section, consisting of a plurality of channel strips (a total of 16 in the figure), is divided into a plurality of blocks. In the figure, eight channel strips are provided in the left block 30 indicated by the dashed-dotted line, and eight channel strips are also provided in the right block 32 indicated by the dashed-dotted line. Each channel strip is provided with controls 22 such as a rotary encoder, various buttons, and a fader (electric fader) 24. A display A20 is provided above the left block 30. A display B21 is provided above the right block 32. Basically, the status of the audio signals assigned to the eight channel strips that make up the left block 30 is displayed on the display A20, and the status of the audio signals assigned to the eight channel strips that make up the right block 32 is displayed on the display B21. However, this does not apply when the full screen button 26 is turned on. That is, when the full screen button 26 is turned on, the display A20 displays the setting status of a certain parameter of an audio signal assigned to one of the eight channel strips that make up the left block 30, and the display B21 displays the setting status of a different parameter of the same audio signal as the left one. Alternatively, the display A20 displays the state of a certain audio signal assigned to one of the eight channel strips that make up the right block 32, and the display B21 displays a different state of the same audio signal.

[0030] Moreover, various buttons are provided as controls 22 on the right side of the digital mixer 10.

[0031] FIG. 3 shows a schematic diagram of one channel strip 30-1 that constitutes the left block 30.

[0032] The channel strip 30-1 includes a mute button, a solo button, a select button, a channel screen, and a fader (electric fader) 24.

[0033] The SEL button is a button that the user operates when selecting a desired channel strip. When the user operates the SEL button, the processor 14 displays a parameter setting screen for that channel strip on the display A20 or the display B21.

[0034] Both the SOLO button and the MUTE button are well known, but to briefly explain, the SOLO button is a button that the user operates when setting a desired channel strip to a solo state. The SOLO button is, for example, a toggle button, and is switched between solo and unsoloed by turning it on and off. The MUTE button is a button that the user operates when setting a desired channel strip to a mute state. The MUTE button is, for example, a toggle button, and is switched between mute and unsoloed by turning it on and off.

[0035] The channel screen displays the current setting status of the channel strip 30-1. The current setting status includes the channel name set by the user, the icon set by the user, the setting value of the fader 24, etc. In the figure, the channel strip 30-1 is ch1, and the user has set vocal (VOCAL) as the channel name, and a vocal icon (microphone icon) is displayed. In addition, "-10 dB" is displayed as the current setting value of the fader 24. When the user operates the fader 24, the display changes according to the operation value.

[0036] The fader (electric fader) 24 is a linear fader, and when operated up or down by the user, adjusts the level of the audio signal (vocal signal in this case) assigned to ch1.

[0037] FIG. 4 shows an example screen of the display A20. The display A20 basically displays the status of the audio signals assigned to the channel strips that make up the left-hand block 30. In FIG. 4, the status of the audio signal assigned to CH2 is displayed as an example. A full-screen button 26 is displayed at the top of the screen, along with a menu 28 of processes to be performed on the audio signal of CH2. The menu of processes includes "INPUT" for adjusting the input level, "GATE" for performing gating, "EQ" for performing equalization, "COMP" for performing compression, and "SEND" for sending to an external device. Of course, other processes may be included, such as a function to automatically lower the background music level when a microphone input is detected while playing background music. When the user operates "INPUT," for example, the screen of the display A20 switches to a screen for setting the input level parameters of the audio signal assigned to CH2. Furthermore, when the user operates "GATE," for example, the screen of the display A20 switches to a screen for setting the gate parameters of the audio signal assigned to CH2. An example of a gate parameter is a threshold value for performing gate processing. When the full screen button 26 is not turned on, the display A20 and the display B21 are not linked and operate independently, and switching the screen of the display A20 does not affect the screen of the display B21.

[0038] FIG. 5 shows examples of the display A20 and display B21 of the digital mixer 10 when the full screen button 26 is turned off. Display A20 displays a parameter setting screen for equalization processing of an audio signal assigned to a channel strip in the left block 30, for example, CH2. Equalization processing parameters include the HPF (high-pass filter) frequency, the LPF (low-pass filter) frequency, the LO (low-frequency) control on / off, the LM (low-midrange) control on / off, the HM (high-midrange) control on / off, and the HI (high-frequency) control on / off. Display B21 also displays the status of all audio signals assigned to the channel strips in the right block 32. This status is referred to as the home screen. This home screen displays the input levels and operational status of various processes, such as gating, equalizing, and compression, for each of the eight audio signals assigned to the channel strips.

[0039] Fig. 6 is an enlarged view of the display A20 in Fig. 5. This is a parameter setting screen for equalizing (EQ) processing of the audio signal assigned to CH2, and displays various parameter on / off buttons, frequency setting buttons, etc. Also, a full screen button 26 is displayed at the top of the screen. The user can use this parameter setting screen to set the desired equalizing processing.

[0040] Fig. 7 shows an example of a display that occurs when the user operates the control 22 from the screen of Fig. 5 to switch the screen of display B21 to a parameter setting screen for an audio signal assigned to one of the channel strips in the right-side block 32. Display B21 displays a parameter setting screen for processing, for example, gate processing, for the audio signal assigned to the channel strip in the right-side block 32.

[0041] Figure 8 is an enlarged view of display B21 in Figure 7. This is a parameter setting screen for gate processing of audio signals assigned to CH10-11, and displays adjustment bars for input level, output level, threshold, range, attack, etc. Note that ATTACK is the time from the moment the threshold is exceeded until the gate is fully open.

[0042] 6, 7, and 8, when the full screen button 26 is not operated to be on, the home screen and parameter setting screen for the audio signal assigned to the channel strip in the left block 30 are displayed on the display A20, and the home screen and parameter setting screen for the audio signal assigned to the channel strip in the right block 32 are displayed on the display B21, but when the user operates the full screen button 26, the parameter setting screen for the same audio signal is displayed on both the display A20 and the display B21. Specifically, in Fig. 7, the parameter setting screen for equalizing processing of the audio signal of CH2 is displayed on the display A20, and the parameter setting screen for gating processing of the audio signals of CH10-11 is displayed on the display B21, but when the user operates the full screen button 26 displayed at the top of the parameter setting screen displayed on the display A20, the screen on the display B21 is switched from the parameter setting screen for gating processing of the audio signals of CH10-11 to the parameter setting screen for the audio signal of CH2, while the screen on the display A20 is maintained. The CH2 parameter setting screen displayed on display B21 can be any of the CH2 parameter setting screens, but is preferably a parameter setting screen other than that displayed on display A20. For example, if display A20 displays a parameter setting screen for equalizing the CH2 audio signal, display B21 may display a parameter setting screen for processing other than equalizing, such as input level, gate processing, or compression processing. Alternatively, a parameter setting screen to be displayed by default when full screen button 26 is turned on may be determined in advance. Alternatively, the parameter setting screen to be displayed when full screen button 26 is turned on may be set by the user and stored in memory 16. Alternatively, the parameter setting screen displayed the previous time full screen button 26 was turned on may be stored in memory 16, and a parameter setting screen similar to the previous parameter setting screen may be retrieved and displayed again.For example, if the previous time the full screen button 26 was turned on, the parameter setting screen for the equalizing process was displayed on display A20 and the parameter setting screen for the compression process (COMP) was displayed on display B21, and if the parameter setting screen for the equalizing process was displayed on display A20 when the full screen button 26 is turned on this time, the parameter setting screen for the compression process will be displayed on display B21.

[0043] Fig. 9 shows an example of a display that appears when the user turns on the full screen button 26 displayed on display A20 in the state shown in Fig. 7. The screen on display A20 remains showing the parameter setting screen for equalizing the audio signal of CH2, but the screen on display B21 switches from the parameter setting screen for gate processing of the audio signals assigned to CH10-11 to a parameter setting screen for compression processing of the audio signal of CH2.

[0044] 10A and 10B show enlarged views of display A20 and display B21 in FIG. 9, respectively. FIG. 10A shows the screen of display A20, which is a parameter setting screen for equalizing the audio signal of CH2. FIG. 10B shows the screen of display B21, which is a parameter setting screen for compression (COMP) of the same audio signal of CH2. Compression parameters include threshold, ratio, attack, knee, etc. Here, knee is a parameter that sets how the sound bends at the boundary with the threshold when compressing sound that exceeds the threshold.

[0045] In this way, different parameter setting screens for the same CH2 audio signal are displayed on both display A20 and display B21, allowing the user to simultaneously set two processing parameters for the CH2 audio signal (in this case, equalization processing parameters and compression processing parameters) using not only display A20 but also display B21.

[0046] In the state of FIG. 9, when the user operates "Input Level" from the processing menu 28 of the display B21, the screen of the display B21 switches to the parameter setting screen for the input level. Also, when the user operates "DUCKER" of the processing menu 28, the screen of the display B21 switches to the parameter setting screen for "DUCKER". In either case, the user can set the parameters for the two processes for the audio signal of CH2 simultaneously. Also, in the state of FIG. 9, when the user operates the channel change button (the part displayed as <CH2 in the figure) displayed at the upper part of the screen to change the channel, the screens of the display A20 and the display B21 switch to the parameter setting screen for the audio signal of the channel changed by the user.

[0047] FIG. 11 shows an example of display when, in the state of FIG. 9, the user operates the channel change button displayed at the upper part of the screen of the display A20 to change from CH2 to CH4. FIGS. 12A and 12B respectively show enlarged views of the display A20 and the display B21 in FIG. 11. FIG. 12A is the screen of the display A20 and is the parameter setting screen for the equalizing process (EQ) of the audio signal of CH4. FIG. 12B is the screen of the display B21 and is the parameter setting screen for the DUCKER process of the same audio signal of CH4. That is, when the channel is changed while the full-screen button 26 is in the on state, the screen of the display A20 switches to the parameter setting screen for the audio signal of CH4 after the change, and at the same time, in conjunction with the display A20, the screen of the display B2...

[0048] 9, even if the user operates the select (SEL) button of any of the channel strips in the left-hand block 30, the screens of the displays A20 and B21 will switch to the parameter setting screen for the audio signal of the selected channel.The same applies when the user operates the select button of any of the channel strips in the right-hand block 32.

[0049] 9, when the user performs an operation to close the parameter setting screen on either display A20 or display B21, the screens on both display A20 and display B21 switch from the parameter setting screen to the home screen. In other words, when full screen button 26 is on, when any display switches to the home screen, the remaining displays also switch to the home screen in conjunction with each other.

[0050] 13 shows a processing flowchart of the processor 14. The processor 14 executes the processing flowchart shown in FIG. 13 by reading and executing a processing program.

[0051] First, the processor 14 displays a home screen on the display A20 and the display B21 (S101).

[0052] Next, processor 14 determines whether a user operation for parameter setting has been performed (102). Specifically, when the user operates the select (SEL) button of any channel strip, processor 14 determines that a user operation for parameter setting has been performed.

[0053] When it is determined that a user operation for parameter setting has been performed (YES in S102), processor 14 determines whether full screen button 26 has been turned on (S103). In the default state, full screen button 26 is in the off state, and hereinafter the off state of full screen button 26 will be referred to as the "normal mode (first mode)" and the on state of full screen button 26 will be referred to as the "full screen mode (second mode)."

[0054] If the full screen button 26 is not turned on and the normal mode is selected (NO in S103), the processor 14 displays parameter setting screens for audio signals of different channels on the display A20 and the display B21 (S104). That is, the parameter setting screen for the audio signal assigned to the channel strip in the left block 30 is displayed on the display A20, and the parameter setting screen for the audio signal assigned to the channel strip in the right block 32 is displayed on the display B21 (S104). Note that if the user operates only the select (SEL) button for one of the channel strips in the left block 30, the parameter setting screen for the audio signal of that channel strip is displayed on the display A20, but the home screen remains displayed on the display B21. Then, when the user sets various parameters using the parameter setting screen, the processor 14 stores the set parameter values ​​in the memory 16 (S105). The stored parameters are used to process the audio signal. For example, when the user sets various parameters for equalizing the audio signal of CH2, the processor 14 executes equalizing on the audio signal of CH2 using the parameter values ​​that have been set and stored in the memory 16.

[0055] On the other hand, when the full screen button 26 is turned on (YES in S103), the processor 14 transitions from the normal mode to the full screen mode and displays parameter setting screens for the same channel on the display A20 and the display B21 (S106). That is, the processor 14 displays a parameter setting screen for one process on the display A20, and a parameter setting screen for a different process on the display B21. The user can arbitrarily set which combination of parameter setting screens to display on the display A20 and the display B21. The processor 14 stores the display combination set by the user in the memory 16. The user simultaneously sets parameters for two processes of the audio signal using the parameter setting screens displayed on the display A20 and the display B21 (S107).

[0056] Next, processor 14 determines whether a user operation to change the channel has been performed (S108). If a user operation to change the channel has been performed on either display A20 or display B21 (YES in S108), processor 14 displays a parameter setting screen for the changed channel on display A20 and display B21 (S109). That is, processor 14 displays a parameter setting screen for a certain process of the audio signal of the changed channel on display A20, and a parameter setting screen for a different process on display B21. Even if a channel change operation has been performed on one display and not on the other display, in full-screen mode, the screens of both displays will switch to the parameter setting screen for the changed channel.

[0057] Next, processor 14 determines whether a user operation to close (OFF) the parameter setting screen has been performed (S110). If a user operation to close the parameter setting screen has been performed on either display A20 or display B21 (YES in S110), processor 14 switches displays A20 and B21 to the home screen (S112). Even if an operation to close the parameter setting screen has been performed on one display but not on the other display, the screens of both displays will be switched to the home screen in full-screen mode.

[0058] 12A and 12B, the full screen button 26 is always displayed at the top of the parameter setting screen, so the user can switch off the full screen button 26 at any time to switch from full screen mode to normal mode. Similarly, the user can switch from normal mode to full screen mode at any time.

[0059] As described above, according to this embodiment, the user can set parameters for processing different audio signals by individually using the two displays A20 and B21 of the digital mixer 10, and can also simultaneously set parameters for two processes of the same audio signal, if necessary, by simultaneously using the two displays A20 and B21. In other words, according to the present invention, it is possible to switch, with a simple operation, between a mode in which parameter setting screens for different channels are individually displayed on the two displays, and a mode in which parameter setting screens for the same channel are displayed in conjunction with each other on the two displays. According to the present invention, it is possible to suppress an increase in the size of the digital mixer 10 and to effectively use multiple displays to enable efficient parameter setting.

[0060] In this embodiment, the digital mixer 10 is described as having two displays, the display A20 and the display B21, but the same applies to a case where three or more displays are provided. For example, if three displays are provided, parameter setting screens for the same channel are displayed in tandem on the three displays in full screen mode, and the user can simultaneously set parameters for three processes (for example, equalizing, gating, and compression) for a certain audio signal. [Explanation of symbols]

[0061] 10 digital mixer, 12 input interface, 14 processor, 16 memory, 18 output interface, 20 display A, 21 display B, 22 controls.

Claims

1. an input interface; an output interface; at least a first display and a second display; an operator; the operators include a mode switching operator for switching between a first mode and a second mode, and a channel changing operator; when the first mode is set by the mode switching operator, parameter setting screens for audio signals of different channels are displayed on the first display and the second display, respectively; when the second mode is set by the mode switching operator, different parameter setting screens for audio signals of the same channel are displayed on the first display and the second display; when a channel is changed by the channel change operator while the second mode is set, different parameter setting screens for the audio signal of the same channel after the change are displayed on the first display and the second display; processing an audio signal input from the input interface using the parameters set based on the parameter setting screen and outputting the processed audio signal from the output interface; Digital mixer.

2. 2. The digital mixer according to claim 1, when the first mode is set by the mode switching operator, displaying on the first display a state of an audio signal assigned to a certain channel strip, and displaying on the second display a state of another audio signal assigned to another channel strip; when the second mode is set by the mode switching operator, the first display and the second display display the status of the audio signals assigned to the same channel strip. Digital mixer.

3. 2. The digital mixer according to claim 1, the first mode is a normal mode, and the second mode is a full-screen mode; The mode switching operator is set to the normal mode in a default state, displaying a home screen on the first display and the second display; When a user operation for parameter setting has been performed and the mode switching operator has not been operated, parameter setting screens for audio signals of different channels are displayed on the first display and the second display, respectively, and when a user operation for parameter setting has been performed and the mode switching operator has been operated to ON, different parameter setting screens for audio signals of the same channel are displayed on the first display and the second display. Digital mixer.

4. 4. The digital mixer according to claim 3, When the mode switching operator is turned on and different parameter setting screens for audio signals of the same channel are displayed on the first display and the second display, if one of the first display and the second display returns to the home screen in response to a user operation, the other display is returned in conjunction with the home screen. Digital mixer.

5. 2. The digital mixer according to claim 1, storing in a memory different combinations of parameters of the same channel audio signal to be displayed on the first display and the second display in the second mode; Digital mixer.

6. 6. The digital mixer according to claim 5, storing in the memory, as a combination of different parameters of the same-channel audio signal to be displayed on the first display and the second display in the second mode, a combination of different parameters displayed on the first display and the second display in the second mode; Digital mixer.

7. 2. The digital mixer according to claim 1, The mode switching operator is displayed as a touch button on the first display and the second display, and displays the current mode status, and enables switching between the first mode and the second mode at any timing. Digital mixer.

8. 2. The digital mixer according to claim 1, The parameters are parameters for at least one of equalizing processing, gate processing, and compression processing. Digital mixer.

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