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DESCRIPTION JP2016072656

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DESCRIPTION JP2016072656
PROBLEM TO BE SOLVED: To display the level of a correct level with good response without
increasing the amount of processing required for level detection as much as possible. SOLUTION:
A level of a point of IM1 (i) and IM4 (i) is detected by a signal processing unit 16. The CPU 10
calculates the level of IM2 (i) by multiplying the detected IM1 (i) level by the ch parameter AL (i)
of Att41, and the CPU 10 detects the level of IM5 (i). It is calculated by multiplying the level of
IM 4 (i) by the ch parameter FL (i) of Fader 43. Similarly, the CPU 10 changes the send level of
the points of SM1 (i, j) and SM2 (i, j) to any of IM2 (i), IM4 (i), IM5 (i), ch parameter. It is
calculated by selectively reflecting SON (i, j) and SL (i, j). [Selected figure] Figure 3
Level meter display
[0001]
The present invention relates to a level meter display device capable of displaying the level of
points on a route without increasing the number of points to be measured.
[0002]
In conventional digital mixers, it is known to set a plurality of points in the path of an input
channel or an output channel and display the level of this point on a meter.
In this case, the level of the point of the input path is displayed on the input system meter, and
the level of the point on the output path is displayed on the output system meter.
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1
[0003]
Patent Document 1 discloses that a sub DSP detects the level of a signal at a desired point of the
processing path of each input channel processed by a time division DSP (Digital Signal
Processor), and the detected level is detected by a CPU (Central Processing). It is described that
Unit) receives from the sub DSP and displays. This patent document 1 describes that level
detection processing by a DSP is performed by cooperation between a microprogram and
dedicated hardware, or realized only by the microprogram without using dedicated hardware. .
Moreover, in patent document 2, detection of the level of the signal in each input channel is not
performed, but CPU calculates the level value of the virtual signal of the meter point which wants
to display a level, and displays a level based on the level value. It has been described to control.
[0004]
JP, 2008-164901, A JP, 2007-243670, A
[0005]
In digital mixers, there is a need to display on the meter the signal at more points in the signal
processing path.
For example, when adjusting the send amount of the sound signal to the mixing bus for each
input channel or each mixing bus, it is convenient for the meter to indicate the level of the signal
sent from the input channel to the mixing bus. More specifically, the user designates one input
channel, and displays the levels of the signals sent from the designated one input channel to each
of the plurality of mixing buses side by side, or the user selects one mixing bus. It is preferable
that the levels of the signals sent from each of the plurality of input channels to one designated
and designated mixing bus can be displayed side by side. In addition, if the user changes the
point of the signal to be displayed on the meter, such as specifying another input channel or
mixing bus, immediately after the change, the correctness of the newly specified point It is
required to display the level on the meter.
[0006]
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2
In the prior art described in Patent Document 1, a signal of a desired point among a plurality of
points IM1 to IM5 is selected, and the signal is passed from the time division DSP 106 to the sub
DSP 107, and the level detection processing of the signal is performed by the sub DSP 107. It is
carried out. Therefore, when the point designated by the user is changed, the meter display of a
new point can be performed by changing the signal passed to the sub DSP 107 accordingly.
However, in this case, since the level detection process of the DSP 107 has attack and release
time constants, at least the time constant must be displayed before the correct level of the signal
of the changed point is displayed. It takes a considerable amount of time. That is, in this method,
it takes time equivalent to a time constant for the response of the meter display to the change of
the designated point by the user. Therefore, in the prior art described in Patent Document 1, in
order to switch the level display with good response, the sub-DSP performs in advance the level
detection of the signal of all the points that may be designated by the user, It is necessary to
adopt a method of selecting the level to be displayed on the meter from the levels of a plurality of
detected points in accordance with the designation of. Here, the problem arises that the sub-DSP
has to perform a huge amount of level detection processing. For example, for each input channel,
16 points including 4 points in the main path of the channel and 12 points for transmitting
signals from the channel to 12 mixing buses are provided as specifiable points, Assuming that
the number of channels is 24, a total of 384 points of level detection will have to be performed.
Also, in the prior art of Patent Document 2, although the levels of a plurality of points provided
for each input channel are displayed, this level is not a level at which an actual signal is
measured, and is not actually present. Level is calculated on the assumption that the Since this
prior art aims at confirming the routing of the signal by offline editing by the remote control
application, the calculated level may be approximate and does not have to match the level of the
actual signal. In particular, in an actual signal, the level of the signal also changes in the
processing of the equalizer, the compressor, etc. However, such a point is not taken into
consideration in this prior art.
[0007]
Therefore, an object of the present invention is to provide a level meter display device capable of
displaying a level with a good response with high response without increasing the processing
amount required for level detection as much as possible.
[0008]
In order to achieve the above object, the level meter display device of the present invention is
provided between a measurement point in a signal path and a non-measurement point, and is
capable of controlling the level of a sound signal; The level detecting means for detecting the
level of the sound signal; calculating means for calculating the level of the sound signal at the
non-measurement point based on the level of the detected sound signal and the level control
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value in the multiplying means; The most important feature is that it comprises: meter display
means for displaying on the meter the level of the non-measurement point calculated by the
means.
[0009]
In the level meter display device of the present invention, the level of the non-measurement point
is calculated based on the detected level of the measurement point and the level control value in
the multiplication means, so the processing amount required for displaying the level meter can
be reduced. It is possible to perform the level display of the correct level with good response
without increasing it as much as possible.
[0010]
It is a functional block diagram showing composition of a digital mixer provided with a level
meter display of an example of the present invention.
It is a functional block diagram showing the composition showing the flow of signal processing of
the digital mixer provided with the level meter display of an example of the present invention.
It is a figure which shows the structure concerning the level meter display in the digital mixer
provided with the level meter display apparatus of the Example of this invention.
It is a flowchart of the display update process which CPU performs in the digital mixer provided
with the level meter display apparatus of the Example of this invention. It is a flowchart which
shows the detail of the input ch meter display update process in the display update process
shown in FIG. It is a flowchart which shows the detail of display control processing of the input
ch meter according to IMP (= IM4) in input ch meter display update processing shown in FIG. It
is a flowchart which shows the detail of display control processing of the input ch meter
according to IMP (= IM5) in input ch meter display update processing shown in FIG. It is a
flowchart which shows the detail of display control processing of the input ch meter according to
SMP (= SM1, SM2) in input ch meter display update processing shown in FIG. It is a figure which
shows an example of a structure of the input ch meter in a digital mixer provided with the level
meter display apparatus of the Example of this invention.
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[0011]
A block diagram showing the configuration of a digital mixer provided with a level meter display
device according to an embodiment of the present invention is shown in FIG. The digital mixer 1
shown in FIG. 1 includes a central processing unit (CPU) 10, a read only memory (ROM) 11, a
random access memory (RAM) 12, an operation element 13, a display 14, a waveform input unit
15, and a signal processing unit A DSP (Digital Signal Processor) 16 and a waveform output unit
17 are connected by a bus line 18. Then, the digital mixer 1 has a function of performing various
signal processing on audio signals input from a plurality of input channels (hereinafter,
“channel” is described as “ch”) and outputting from a plurality of output channels. . The
CPU 10 is a control unit that generally controls the operation of the digital mixer 1, and executes
a required program stored in the ROM 11 to perform input / output processing in the waveform
input unit 15 and the waveform output unit 17 and display on the display 14. Processing is
performed such as control of signal processing and level detection processing in the signal
processing unit 16 and processing of setting / changing parameter values and controlling
operations of each part according to the operation of the operation element 13 detected. The
ROM 11 stores operation software to be executed by the CPU 10. In addition, a work memory
area for temporarily storing data is set in the RAM 12 and is a storage unit that can be used as a
work memory of the CPU 10. Besides the configuration in which the ROM 11 and the RAM 12
are independent storage means, various configurations can be adopted such as using a flash
memory or the like as a part of the ROM area and using the other part as a RAM area. The
operating element 13 is for receiving the user's operation on the digital mixer 1 and is composed
of various keys, buttons, dials, sliders, mice, wheels, track balls, touch panels or the like. For
example, a plurality of ch strips provided with a rotation knob, a button, a fader, and the like may
be provided, for example, 12 channels, as operators for controlling parameters of one channel. It
is preferable that twelve channels belonging to one layer, which will be described later, selected
by the user be assigned as a control target to the twelve ch strips. The display 14 is a display
means for displaying various information under the control of the CPU 10, and can be
constituted by, for example, a liquid crystal panel (LCD) or the like.
And since the reference of the value of a parameter and the acceptance of a setting are
performed by GUI (Graphical User Interface) in many cases, the display 14 is made into the
magnitude | size which can display GUI. In addition, a level meter may be displayed on the
display 14 to display the level of the metering point of the input channel or the output channel.
[0012]
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The waveform input unit 15 externally receives analog or digital audio signals of a plurality of
channels, and supplies corresponding digital acoustic signals of a plurality of channels to the
signal processing unit 16. The waveform output unit 17 converts digital acoustic signals of a
plurality of channels supplied from the signal processing unit 16 into digital acoustic signals as
they are or into analog acoustic signals and outputs the signals to the outside. The signal
processing unit 16 is configured by one or more DSPs (Digital Signal Processors), and the micro
program set by the CPU 10 is executed to set an acoustic signal input from the waveform input
unit 15 by the CPU 10 It is a signal processing unit that performs various signal processing such
as equalization and mixing according to the values of various control data, and outputs the
processed signal to the waveform output unit 17. The RAM 12 is provided with a current
memory area for storing various parameters for the signal processing unit 15 to perform signal
processing, and the CPU 12 controls the signal processing unit 16 to execute various control data
based on various parameters of the current memory area. Set In addition to the signal processing,
the signal processing unit 16 performs processing to detect the level of the metering point. When
the CPU 10 reads out the level detected here and performs display update processing, the level
of the metering point whose display is updated is displayed on the level meter.
[0013]
Next, a functional block diagram showing the flow of signal processing in the digital mixer 1
provided with the level meter display device of the embodiment is shown in FIG. In FIG. 2, analog
sound signals input to a plurality of analog input ports (A input) 20 are converted into digital
sound signals by an AD converter incorporated in the waveform input unit 15 and input to the
input patch 22. Be done. Further, digital sound signals input to the plurality of digital input ports
(D input) 21 are input to the input patch 22 as they are. The input patch 22 can selectively patch
(connect) each of a plurality of input ports, which are input sources of acoustic signals, to each
input channel of the input channel unit 23 which is, for example, 24 ch. The sound signal from
the input port patched by the input patch 22 is supplied. Note that only one of the A input 20
and the D input 21 may be provided.
[0014]
The input channel section 23 has 24 input channels, and each input channel is provided with an
attenuator, equalizer, dynamics, fader, channel switch, pan, selector, send switch, send fader, etc.
With respect to the supplied sound signal, on / off and level control of frequency balance, level
control, and transmission to the stereo (ST) bus 24 and the mixing (MIX) bus 25 are controlled.
The sound signals of 24 ch output from the input ch unit 23 are selectively output to one or
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more of the 12 MIX buses 25 of the MIX 1-12 or the ST bus 24. In ST bus 24, one or more sound
signals selectively input from any of 24 input channels in L and R buses are mixed by mixing the
sound signals of the stereo configuration, and the mixed stereo The sound signal of the
configuration is output to the ST output ch unit 26. The configuration of the sound signal of the
stereo configuration is indicated by a broken line. The MIX bus 25 mixes one or a plurality of
sound signals selectively input from any one of 24 input channels on each of 12 buses, and
outputs the mixed signal to the MIX output channel 27. The MIX output ch unit 27 has 12 ch
MIX output ch corresponding to 12 MIX buses. The symbol "j" (j is any one of integers 1 to 12) is
used to indicate a specific bus among the 12 MIX buses.
[0015]
At each output ch of ST output ch unit 26 and MIX output ch unit 27, desired signal processing
such as equalization and level control is performed on the sound signal from the corresponding
bus, and the processed sound signal is output. It is output to the output patch 28. In the output
patch 28, either the sound signal of the stereo configuration from the ST output ch unit 26 or the
sound signal of 12 ch from the MIX output ch unit 27 is output to an analog output port unit (A
output) 29 or a digital output port unit (D Output (30) can be selectively patched (connected) to
each output port, and each output port is supplied with a sound signal from the output channel
patched by the output patch. The digital sound signal supplied to each output port of the analog
output port unit (A output) 29 is converted to an analog sound signal by a DA converter
incorporated in the waveform output unit 17 and output from the analog output port. Ru. The
output analog sound signal is amplified and emitted from the main speaker, supplied to an in-ear
monitor worn by a performer, or reproduced by a stage monitor speaker placed near the
performer. Be done. In addition, digital sound signals output from each output port of the digital
output port unit (D output) 30 are supplied to a recorder or an externally connected DAT or the
like so that digital recording can be performed. Note that only one of the A output 29 and the D
output 30 may be provided.
[0016]
The structure concerning the level meter display in the digital mixer 1 provided with the level
meter display apparatus 2 of the Example of this invention is shown in FIG. In FIG. 3, the
configuration of the input ch (i) and the metering points IM1, IM2, IM4, IM5, SM1, and SM2 of
the input ch (i), and the cooperation of the signal processing unit 16 and the CPU 10 on the
display 14. A level meter display 2 is shown which displays the level meter. The configuration of
each of the 24 ch input channels is the same, and the metering points described above are
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similarly provided for each input channel. In the following, when indicating the metering point of
the input ch (i), IM1 (i), IM2 (i), IM4 (i), IM5 (i), SM1 (i, j), SM2 (i, j) write. Here, “i” indicates
the i-th input channel (ch number i), and “j” indicates the j-th MIX bus (bus number j) in the
MIX bus 25. The input ch (i) is an attenuator (Att) 41, equalizer and dynamics (EQ, Dyna) 42,
fader (Fader) 43, ch switch (CHSW) 44, panning controller (PAN) 45, and 12 pieces of SSEL1 to
SSEL12. , And 12 send switches (SSW) of SSW1 to SSW12, and 12 send faders (SF) of SF1 to
SF12. Further, the signal processing for all input channels including the input channel (i) is
performed by the DSP of the signal processing unit 16.
[0017]
The Att 41 performs level control according to the set ch parameter AL (i) to the sound signal
supplied from the input patch 22 to the input ch (i). The EQ in EQ and Dyna 42 adjusts the
frequency characteristic according to the set ch parameter EPS (i) to the sound signal from Att
41, and the Dyna performs automatic gain adjustment according to the set ch parameter DPS (i) I
do. The Fader 43 performs processing to adjust the level of the sound signal from the EQ and
Dyna 42 in accordance with the gain value FL (i) which is the set ch parameter. The digital mixer
1 includes a plurality of ch strips as the controls 13 on the panel, and the input is changed by
changing the value of FL (i) according to the operation of the fader of the ch strip assigned to the
input ch (i). It is possible to adjust the level of the sound signal of ch. The CHSW 44 is a switch
that turns on (= supplied) / off (= cut off) the output of the sound signal from the Fader 43 to the
subsequent stage according to the set ch parameter ON (i). It can be turned on and off. The PAN
45 is a controller that adjusts the sound image localization of the sound signal according to the
set ch parameter PAN (i), and the sound signals of L and R configurations output from the PAN
45 are supplied to the ST bus 24. The configuration relating to the sound signal of the stereo
configuration is indicated by fine broken lines.
[0018]
SSEL1 to SSEL12 provided corresponding to each of the 12 buses of the MIX bus 25 output the
sound signal of the input channel (i) to the MIX bus 25 of the jth (j is any one of integers 1 to 12)
At the same time, according to the set ch parameter SS (i, j), the sound signal of the pre-equalizer
(ch output is taken from the front of EQ, Dyna 42) and the sound signal of the pre-fader (ch
output is taken from the front of Fader 43) And a selector for selecting one of the sound signals
of the post-fader (ch output taken from the rear side of Fader 43) for each bus. SSW1 to SSW12
provided corresponding to the buses of MIX bus 25 turn on transmission of the sound signal
from SSEL j to MIX bus 25 of number j according to the set ch parameter SON (i, j). (= Supply) /
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off (= shutoff) switch. The SF1 to SF12 provided corresponding to the buses of the MIX bus 25
adjust the level of the sound signal sent from the SSW j to the MIX bus 25 of number j according
to the set ch parameter SL (i, j) The outputs from SF1 to SF12 are supplied to the 12 MIX buses
25 respectively. The parameters of the CHSW 44 and SSW described above can be turned on /
off by the button operation of the channel strip assigned to the input channel (i). In addition, the
parameters of SSELj and SFj in the input channel (i) can also be changed by operating the rotary
knob of the channel strip. In addition, instead of assigning to the controls 13 provided on the
panel, a rotary encoder and various switches are displayed on the display 14, and these controls
on the screen are operated by the mouse or touch pad (or directly on the touch panel) You may
The present values of the respective ch parameters described above are held in the current
memory area set in the RAM 12 for each input channel, and the CPU 10 controls various signal
processing in the signal processing unit 16 based on the present values.
[0019]
The level meter display device 2 according to the present invention included in the digital mixer
1 is realized by the cooperation of the signal processing unit 16 and the CPU 10 as shown in FIG.
In the level meter display device 2, when the user designates one of the plurality of metering
points set as the input channel, the level of the designated point is displayed on the input channel
meter for each input channel. Can. In FIG. 3, on the signal path of the input ch (i), IM1 (i), IM2 (i),
IM4 (i), IM5 (i), SM1 (i, j), SM2 (i) as metering points. , J) are prepared. For example, the number
of MIX buses 25 is 12, and a total of 28 points of 4 points of IM1, IM2, IM4 and IM5, 12 points
of SM1, and 12 points of SM2 are prepared for the input channel (i) Assume the case. In this
case, in the level meter display device 2 according to the present invention, only the two points
IM1 (i) and IM4 (i) of the 28 metering points of the input ch (i) Detect level Then, based on the
levels IM1 (i) and IM4 (i) whose levels are detected and the predetermined ch parameters, the
CPU 10 performs IM2 (i), IM5 (i), SM1 (i, j), and SM2 (i). , J) are calculated. Here, IM1 (i) and IM4
(i) among the metering points of input ch (i) are referred to as measurement points, and IM2 (i),
IM5 (i), SM1 (i, j) and SM2 (i). , J) are called non-measurement points. In the flowcharts of various
processes described later, the levels of the sound signals of the measurement points IM1 (i) and
IM4 (i) of all the input channels are once taken into the work memory area, but the writing is
performed at that time. The same "IM1 (i)" and "IM4 (i)" are used as symbols indicating the
different levels. Further, in FIG. 3, measurement points are indicated by solid lines, and nonmeasurement points are indicated by rough broken lines.
[0020]
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Specifically, the level of the measurement point IM1 (i) on the input side of the Att 41 needs to
be measured because it is the level of the sound signal from the input patch 22, and in the EQ
and Dyna 42, non-linear processing is performed. The level of the measurement point IM4 (i) on
the output side needs to measure the level of the sound signal after nonlinear processing.
Therefore, the signal processing unit 16 performs processing of level detection (actual
measurement) of IM1 (i) and IM4 (i), and provides the detected level to the CPU 10. Also, Att41,
Fader 43, and SF1 to SF12 are means for adjusting the level of the sound signal. More
specifically, the ch parameters AL (i), FL (i), and SL (i, j) in decibel scale are sounded. CHSW 44
and SSW1 to SSW12 are means for passing / cut-off the sound signal, but the ch parameter ON
(i) of “0” (off) or “1” (on) Since SON (i, j) can be regarded as multiplication means for
multiplying by linear scale (multiplication means for multiplying “0 dB” (on) and “−∞ dB”
(off) in the case of decibel scale), the input executed by CPU 10 In the system meter display
control process, provided at the level of IM1 (i) or IM4 (i) provided from the signal processing
unit 16 and the path to the non-measurement point Calculating the levels of the sound signals of
the non-measurement points IM2 (i), IM5 (i), SM1 (i, j) and SM2 (i, j) by calculation based on the
channel parameters of the multiplication means. Can. Also, when there is a selector (SSEL1 to
SSEL12) that switches the path of the sound signal, there are multiple points (pre-equalizer, prefader, An arithmetic process may be performed to select one of the levels of the post-fader sound
signal. If these calculations are performed only for non-measurement points selected to be
displayed by the input channel meter, the amount of calculations performed by the CPU 10 can
be reduced. In the present specification, as in the Att41, Fader43, SF1 to SF12, CHSW44 and
SSW1 to SSW12, if the related parameters are constant, a constant level change is applied to the
sound signal regardless of the characteristics of the sound signal. Those that do are called
multiplication means. Also, as in EQ and Dyna 42, even if the related parameters are constant,
those which apply different level changes to the sound signal according to the characteristics of
the sound signal are called non-multiplication means.
Since the level change of the sound signal in the non-multiplication means is not determined by
the parameter, it is necessary to measure the level at the end of the non-multiplication means, for
example, at the measurement point IM4.
[0021]
By the way, in the process of level detection performed by the signal processing unit 16, the
logarithm of the absolute value of the sound signal extracted from the measurement point is
taken, the value is periodically peak-held, and the value held is further calculated. By applying a
filtering process having a high rise speed and a low fall speed, the level on the decibel scale of
the sound signal at the measurement point is detected. Here, from the viewpoint of operability,
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when the user designates a point to be displayed, it is required to immediately display the level of
the designated point on the meter. If the conventional digital mixer responds to this request, the
signal processor 16 detects the level of all metering points. In that case, the level detection
process will always be performed for 4 points of IM1 to IM5, 12 points of SM1 and 12 points of
SM2 for 1 input channel, and 672 points for 24 input channels at all times. The processing load
of the signal processing unit 16 for processing becomes extremely heavy. Therefore, in the level
meter display device 2 according to the present invention, the level of two measurement points
IM1 and IM4 is detected by the signal processing unit 16 for one input channel, and the level of
the non-measurement points is calculated by the CPU 10 by calculation. It is like that. As a result,
the number of points whose level is detected by the signal processing unit 16 is also 48 for 24
input channels, and the processing load of the signal processing unit 16 is considerably reduced
as compared with the above-described level detection processing. Furthermore, although the
level of the non-measurement point is calculated by the CPU 10 by calculation, the processing
load on the CPU 10 for this calculation process is slight. Thereby, the level meter display device 2
according to the present invention performs the level display of the correct level with good
response even when the signal point to be displayed on the meter is changed without increasing
the processing amount required for the level meter display as much as possible. Will be able to
[0022]
An example of the configuration of the input channel meter is shown in FIG. Here, the input
channel meter of this configuration is displayed on the display 14 as an image. The configuration
of the input channel meter may be configured by a physical meter using a light emitting diode
(LED) or the like and provided on the panel of the digital mixer 1. In the input channel meter
shown in FIG. 9, the user selects either the main meter (MAIN METER) or the send meter (SEND
METER) to be displayed on the meter. In FIG. 9, it is displayed that the main meter has been
selected and selected with a bold frame. When the main meter is selected, measurement point
IM1 “PRE ATT”, non-measurement point IM2 “PRE EQ”, measurement point IM4 “PRE
FADER”, non-measurement point IM5 “POST ON” Any one can be selected by the user. In FIG.
9, “PRE FADER” which is the measurement point IM4 is selected and displayed with a thick
black frame, and each level of the measurement point IM4 of the input ch1 to the input ch12 is
an input ch for each input ch It is displayed on the meter. In this digital mixer, 24 input channels
are divided into a first layer of "ch1 to ch12" and a second layer of "ch13 to ch24", and 12 of the
layers selected by the user are used as input channel meters. The level for the input channel is
displayed on 12 level meters. In FIG. 9, “ch1 to ch12” of the first layer is selected by the user,
and the image of the corresponding button is displayed in a thick black frame, and the ch
numbers of “ch1” to “ch12” are for each level meter. It is displayed below, and each level of
measurement point IM4 of "ch1-ch12" is displayed on the level meter corresponding to each
input channel. Here, when the user selects the second layer of “ch13 to ch24”, the ch numbers
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of “ch13” to “ch24” are displayed under each level meter, and the level of measurement
point IM4 of input ch13 to input ch24 is , And displayed on the level meter corresponding to
each input channel. The layer selection of the input channel meter may be interlocked with the
layer selection in the channel strip described above. Although detailed description will be
omitted, layer selection is performed, for example, when the user operates a predetermined layer
selection button among the controls 13.
Also, when the user selects "PRE ATT", the level of measurement point IM1 selects the level of
non-measurement point IM2 when "PRE EQ" is selected, and when the user selects "POST ON",
the non-measurement point IM5 Level is displayed on the corresponding level meter for each of
the 12 ch input channels belonging to the layer of the input channel selected by the user. Thus,
when the main meter is selected, the level of the point specified by the user among IM1, IM2,
IM4, and IM5 is displayed on the corresponding level meter for each of 12 channels belonging to
the layer selected by the user. It will be.
[0023]
Further, when the user selects the send meter (SEND METER), it is possible to select either "PRE
SEND" which is the non-measurement point SM1 or "POST SEND" which is the non-measurement
point SM2. When the user selects the send meter (SEND METER) and selects "PRE SEND" which is
the non-measurement point SM1, the non-measurement point SM1 of the front side of the send
fader SF sent from 12 input channels to one MIX bus 25 The level of the sound signal is
displayed on the input channel meter. Here, the desired one MIX bus is designated by the user in
advance, and the level of the sound signal of the non-measurement point SM1 sent from each of
the 12 input channels to the designated one MIX bus is input. Each ch is displayed on the
corresponding level meter.
[0024]
Furthermore, when the user selects a send meter (SEND METER) and selects "POST SEND" which
is a non-measurement point SM2, non-measurement on the rear side of the send fader SF sent
from 12 input channels to one MIX bus 25 The level of the sound signal at point SM2 is
displayed on the input channel meter. The desired one MIX bus is specified by the user, and the
level of the sound signal of the non-measurement point SM2 sent from each of the 12 input
channels to the specified 1 MIX bus is each input channel. Displayed on the corresponding level
meter.
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[0025]
FIG. 4 shows a flowchart of a display updating process which the CPU 10 periodically (for
example, every 1 ms to several ms) executes for updating the display of the level meter. When
this display update process is started, the CPU 10 causes the signal processing unit 16 to
measure points IM1 (i), at all input channels (input ch1 to input ch24) whose levels are detected
by the signal processing unit 16 in step S10. The detection level (decibel value) of IM 4 (i) is read
out from the signal processing unit 16 and written to the work memory area as IM 1 (i) and IM 4
(i). In the input channel, measurement point IM3 (not shown) is provided behind EQ in EQ and
Dyna 42, and in step S10, the detection level of the sound signal of measurement point IM3 (i) is
also fetched, and other than the input channel meter It may be used for meter display (not
shown). Next, in step S11, the CPU 10 reads the detection levels of the other measurement points
from the signal processing unit 16 and writes the detection levels in the work memory area. The
other measurement points are, for example, measurement points provided on the output channel
and the signal path of the monitor. Then, in step S12, the CPU 10 detects the level (decibel value)
of the sound signal of the metering point (measurement point or non-measurement point)
designated by the user at the detection level of each measurement point fetched into the work
memory area. Or the level of each input channel obtained on the basis of the channel parameter
of the above-mentioned multiplying means provided on the route to the non-measurement point,
and the obtained input channel is displayed on the display 14 Reflect on the meter. Details of the
meter display update process of step S12 will be described later. When the display update
process of step S12 is completed, the CPU 10 updates the other meter displays (output channel
meter and the like) provided on the display 14 and the panel in step S13. When the process of
step S13 ends, the display update process ends, and the latest level of the point selected by the
user is displayed on the input channel meter. The display update process of FIG. 4 is periodically
executed regardless of whether or not various level meters are displayed on the display 14 in
order to improve the response to the user operation, and the level meter not displayed is not
displayed. The corresponding meter display update process is omitted. For example, when the
input channel meter is not displayed, the corresponding display update process (step S12) may
be omitted.
[0026]
FIG. 5 shows a flowchart of the input channel meter display update processing executed by the
CPU 10 in step S12 of the display update processing shown in FIG. When the input channel
meter display update process is started, the CPU 10 determines in step S20 whether or not the
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send meter (SM) is selected by the user as an object to be displayed on the input channel meter.
Here, when “MAIN METER” is selected (SM = 0), the process proceeds to step S21, and the
CPU 10 performs display control processing of the input channel meter according to the points
(IMP) of IM1 to IM5 described later. , The input channel meter display update process ends.
When “SEND METER” is selected (SM = 1), the process branches to step S22 and the CPU 10
performs display control processing of the input channel meter according to the point (SMP) of
SM1 or SM2 described later, The input channel meter display update process ends. Although
details are omitted, parameters relating to screen display are held in a work memory area of the
RAM 12 and their values change in accordance with the operation by the user. For example, the
parameter SM is “0” as the flag SM value if “MAIN METER” is selected according to the
selection operation by the user, and “1” if the “SEND METER” is selected. "Is held in the
work memory area.
[0027]
When the user designates "PRE FADER" (measurement point IM4) in step S21 of the input
channel meter display update processing shown in FIG. 5, the flowchart of the display control
processing of the input channel meter executed by the CPU 10 is shown in FIG. Shown in. When
the display control process of the input channel meter according to the IMP (= IM4) is started,
the CPU 10 sets an input channel number to be processed first to the variable i in step S30. Here,
when the first layer of the input channel is selected, “1” is set to the variable i, and when the
second layer is selected, “13” is set to the variable i. Next, in step S31, the CPU 10 stores the
level IM4 (i) of the measurement point IM4 (i) stored in the work memory area in the variable
Val. Then, in step S32, the CPU 10 controls the display of the level meter so that the level
(decibel value) stored in the variable Val is reflected in the level meter of the input channel (i) in
the input channel meter. . Next, in step S33, the CPU 10 determines whether the update
processing for controlling the level meters of all the input channels in the input channel meter
has been completed. Here, when the first layer is selected, when the variable i is less than "12",
and when the second layer is selected, when the variable i is less than "24", respectively. It is
determined that the update process has not been completed (NO), and the process proceeds to
step S34. In step S34, the CPU 10 sets a value obtained by adding “1” to the current variable i
to the variable i as an input channel number to be processed next, returns the process to step
S31, and repeats the process of steps S31 to S33. As a result of the CPU 10 repeatedly
performing the processing of step S31 to step S34, when the variable i reaches "12" (when
selecting the first layer) or the variable i reaches "24" (when selecting the second layer) in step
S34, In the processing of step S33 performed after that, the CPU 10 determines that the
processing of all the input channel meters in the input channel meter has been completed (YES),
and the display control processing of the input channel meter according to IMP (= IM4) Finish. In
this display control process, when the first layer is selected, the level of the sound signal at “PRE
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FADER” (measurement point IM4) of the input ch13 to the input ch24 when the second layer is
selected at the input ch1 to the input ch12 is input ch meter Control to display on is performed.
[0028]
When the user selects “PRE ATT” which is the measurement point IM1 in the input channel
meter shown in FIG. 9, the CPU 10 performs display control processing of the input channel
meter according to IMP (= IM1). This process may be a process in which a part of the process in
FIG. 6 is changed (a process in which IM4 (i) is replaced with IM1 (i)), and the CPU 10 selects 12
of the 12 input channel layers selected by the user. Control is performed to display the level of
the sound signal at the input channel "PRE ATT" (measurement point IM1) on the input channel
meter.
[0029]
A flowchart of display control processing of the input channel meter executed by the CPU 10
when “POST ON” (non-measurement point IM5) is designated by the user in step S21 of the
input channel meter display update processing shown in FIG. It shows in 7. When the display
control process of the input channel meter according to this IMP (= IM5) is started, the CPU 10
sets the number of the input channel to be processed first to the variable i in step S40. Here,
when the first layer is selected, the variable i is set to “1”, and when the second layer is
selected, the variable i is set to “13”. Next, in step S41, the CPU 10 reads out the ch parameter
ON (i) of the ch switch (CHSW) 44 from the current memory area, and determines whether it is
"0" or "1". If ON (i) is “1” (CHSW 44 is on), the process proceeds to step S 42 and the CPU 10
reads the level IM 4 (i) of the measurement point IM 4 (i) from the work memory area and ch
parameter of Fader 43 Read FL (i) from the current memory area and store their sum in the
variable Val. In this case, IM4 (i) and FL (i) are both decibel values, and their sum corresponds to
multiplication on a linear scale. If ON (i) is "0" at step S41 (CHSW 44 is off), the process branches
to step S43 and the CPU 10 stores the level (decibel value) of "-.infin." In the variable Val. .
[0030]
When the process of step S42 or step S43 is completed, CPU 10 causes the level (decibel value)
stored in variable Val to be reflected in the level meter of ch “i” in the input channel meter in
step S44. Control the display of the level meter. Next, in step S45, the CPU 10 determines
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15
whether the updating process of the meter of the non-measurement point IM5 related to the 12
input channels of the input channel meter has been completed. Here, when the variable i is less
than "12" (when selecting the first layer) or less than "24" (when selecting the second layer), it is
determined that the update process has not been completed (NO), and the process proceeds to
step S46. move on. In step S46, the CPU 10 sets a value obtained by adding “1” to the current
variable i as the variable i, returns the process to step S41, and repeatedly performs the process
of steps S41 to S45. As a result of the CPU 10 repeatedly performing the processing of step S41
to step S46, when the variable i reaches "12" (when selecting the first layer) or "24" (when
selecting the second layer) in step S46, the line is thereafter set. In the process of step S45, the
CPU 10 determines (YES) that the process of the meter in the 12 input channels is completed,
and ends the display control process of the input channel meter according to IMP (= IM5). As a
result, the CPU 10 performs calculation for reflecting the gain value FL (i) of the Fader 43 and
the on / off ON (i) of the SHSW 44 on the level of the measurement point IM4 (i), which
corresponds to 12 channels of the non-measurement point IM5 (i). Control to display the level of
the input channel on the input channel meter is performed.
[0031]
If IM4 (i) and FL (i) are linear scale values, the CPU 10 performs an operation of multiplying IM4
(i) by FL (i) instead of addition in step S42. By doing this, the level of the non-measurement point
IM5 (i) may be calculated and stored in the variable Val. When the user selects “PRE EQ”
which is the non-measurement point IM2 in the input channel meter, the CPU 10 performs
display control processing of the input channel meter according to IMP (= IM2). This process is a
process in which a part of the process of FIG. 7 is changed (step S41 is always branched to
“1”), IM4 (i) is replaced with IM1 (i), and FL (i) is an attenuation value of Att41. And the ch
parameter AL (i). Thus, the CPU 10 measures the level of the sound signal of “PRE EQ” (nonmeasurement point IM2) at the input ch1-12 (when the first layer is selected) or the input ch1324 (when the second layer is selected). Calculation is performed by reflecting the attenuation
value AL (i) of Att41 on the level IM1 (i) of (i), and control is performed to display the calculated
“PRE EQ” level for 12 channels on the input channel meter.
[0032]
FIG. 8 shows a flowchart of the display control process of the input channel meter according to
the SMP (= SM1, SM2) executed by the CPU 10 in step S22 of the input channel meter display
update process shown in FIG. This display control process is a display control process when the
user selects the send meter (SEND METER) in the input channel meter. When the display control
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process of the input channel meter according to the SMP (= SM1, SM2) is started, the CPU 10
sets the bus number of the MIX bus 25 as the target designated by the user in the variable j in
step S50. At the same time, the input channel number to be processed first is set to the variable i.
Here, when the first layer of the input channel is selected, “1” is set to the variable i, and when
the second layer is selected, “13” is set to the variable i. Next, in step S51, the CPU 10 reads
out the ch parameter SON (i, j) of the send switch (SSWj) to the MIX bus of No. j from the current
memory area, and determines whether it is "0" or "1". In the case of “1” (SSW j is on), the
process proceeds to step S52. Also, in the case of "0", since SSWj is off, the process branches to
step S53, and the CPU 10 stores the level (decibel value) of "-∞" in the variable Val, and
subsequently in step S60. The level meter display is controlled so that the stored level is reflected
in the level meter of ch “i” in the input channel meter.
[0033]
In step S52, the CPU 10 reads the ch parameter SS (i, j) of the send selector (SSELj) for the j-th
MIX bus from the current memory area, and selects one of “0”, “1” and “2”. Determine if
there is. If SS (i, j) is "0" in step S52, the sound signal of the non-measurement point IM2 (i) is
selected in SSEL j, so the process proceeds to step S54 and the CPU 10 selects the work memory.
Calculate the level of the non-measurement point IM2 (i) by adding the ch parameter AL (i) of
Att41 read from the current memory area to the level IM1 (i) of the measurement point IM1 (i)
read from the area Store the level of IM2 (i) in the variable Val. If SS (i, j) is "1" at step S52, the
sound signal of measurement point IM4 (i) is selected, so the process proceeds to step S55 and
CPU 10 measures measurement point IM4. The level of (i) is read from the work memory area
and stored in the variable Val. Furthermore, if SS (i, j) is "2" in step S52, the sound signal of the
non-measurement point IM5 (i) is selected, so the process proceeds to step S56 and the CPU 10
switches the ch switch. The ch parameter ON (i) of (CHSW) 44 is read from the current memory
area, and it is determined whether it is "0" or "1". If it is "1" (CHSW 44 is on), the process
proceeds to step S57, the CPU 10 reads the level of the measurement point IM4 (i) from the work
memory area, and ch parameter FL (i) of Fader 43 from the current memory area. Read out and
store their sum in variable Val. If ON (i) is "0" at step S56, then CHSW 44 is off, so the process
branches to step S58 and CPU 10 stores the level of "-.infin." In variable Val. Do.
[0034]
When the process in any one of steps S54, S55, S57, and S58 is completed, the process proceeds
to step S59, and the CPU 10 allows the user to select either "PRE SEND" (non-measurement point
SM1) or "POST SEND" (non-measurement point SM2). Determine if it is specified. If "PRE SEND" is
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17
selected, the process proceeds to step S60, and the CPU 10 stores the level (decibel) of the nonmeasurement point SM1 (i, j) when SSWj is on, which is stored in the variable Val at that time.
The display of the level meter is controlled so that the value () is reflected in the level meter of ch
“i” in the input channel meter. If "POST SEND" is specified, the process branches to step S61,
and the CPU 10 changes the channel parameter SL (i, of the send fader (SF) i read from the
current memory area to the level stored in the variable Val. j) is added, and the added level is
stored in the variable Val. Next, proceeding to step S60, the CPU 10 stores the level (decibel
value) of the non-measurement point SM2 (i, j) when SSWj is on, which is stored in the variable
Val at this time, in The display of the level meter is controlled so as to be reflected on the level
meter of i. Note that in step S61, even if some gain is added to "-.infin." In decibel scale, the result
remains "-.infin.". Therefore, after the process of step S58 is completed, the process may directly
proceed to step S60.
[0035]
When the process of step S60 ends, the process proceeds to step S62, and the CPU 10
determines whether the update process of the input channel meter related to the 12 input
channels is completed. Here, when the variable i is less than "12" (when selecting the first layer)
or less than "24" (when selecting the second layer), it is determined that the update process has
not been completed (NO), and the process proceeds to step S63. move on. In step S63, the CPU
10 sets a value obtained by adding “1” to the current variable i to the variable i as the input
channel number of the next meter, returns to step S51, and repeats the processing of steps S51
to S62. As a result of the CPU 10 repeatedly performing the processing of step S51 to step S63,
when the variable i reaches "12" (when selecting the first layer) or "24" (when selecting the
second layer) in step S63, the line In the process of step S62, the CPU 10 determines (YES) that
the process of the input channel meter related to the 12 input channels is completed, and ends
the display control process of the input channel meter according to the SMP (= SM1, SM2) Do. As
a result, the CPU 10 sets the ch parameter AL (i), FL (i), ON (i), SS (i, j), SON (i, j) to the level of the
measurement point IM1 (i) or IM4 (i). And SL (i, j) are selectively reflected according to the nonmeasurement point designated by the user, and 12 ch of non-measurement point SM 1 (i, j) or
SM 2 (i, j) are calculated. Control is performed to display the level of the sound signal on the
input channel meter.
[0036]
If IM1 (i) and AL (i) are linear scale values, in step S54, the CPU 10 calculates the level at which
IM1 (i) is multiplied by AL (i) as the variable Val. Store in If IM4 (i) and FL (i) are linear scale
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values, the CPU 10 calculates the level at which IM4 (i) is multiplied by FL (i) in step S57 as a
variable. Store in Val. Furthermore, in the case where the level of variable Val and SL (i, j) are set
as linear scale values, the CPU 10 performed an operation of multiplying the level of variable Val
by SL (i, j) in step S61. Store the level in the variable Val.
[0037]
The present invention described above can also be applied to an output channel meter display
device provided with level meters of a plurality of output channels. Each output ch in the MIX
output ch unit 27 shown in FIG. 2 is equipped with an equalizer, a compressor, a fader, etc., and
frequency balance adjustment and level are performed on the sound signal from the
corresponding MIX bus at these output ch. Signal processing such as adjustment and level
control is performed, and the processed sound signal is supplied to the output patch. The level
meter of each output channel of the output channel meter can display the level of the input point
of the output channel connected to the MIX bus 25, the point on the back side of the equalizer,
the point on the front side and the back side of the fader, etc. it can. In this case, the input point
on the output channel and the point on the rear side of the equalizer are taken as measurement
points for measuring the level by the signal processing unit 16 detecting the level, and the points
on the front side and the rear side of the fader are the CPU 10 described above It is considered as
a non-measurement point which calculates a level by performing operation.
[0038]
Furthermore, the level of the sound signal sent from one input channel to a plurality of MIX
buses may be displayed on the output channel meter. In that case, the user designates one input
channel, and the level of the sound signal at the non-measurement points SM1 to SM2 of the
sound signal transmitted from the designated one input channel to each of the plurality of MIX
buses is shown in FIG. The level of the sound signal sent to each MIX bus calculated using the
same method as the method of calculating the level of the sound signal at the non-measurement
points SM1 to SM2 described in relation to It may be displayed on the level meter of the
corresponding MIX output channel. Although the level meter display device according to the
present invention is provided in the digital mixer in the above description, the present invention
is not limited to this, and a multiplier or a functional block that can be regarded as a multiplier is
provided on the route. The present invention can be applied to a device having a function of
displaying the level of the upper point on a display meter.
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19
[0039]
In the above description, the level meter display device 2 has been described as being provided
in the digital mixer 1, but the level meter display device 2 may be realized as a remote controller
or the like configured outside the digital mixer 1. In this case, the level meter display device 2
and the digital mixer 1 are connected via a communication network such as USB, for example,
acquire the level of the measurement point from the digital mixer 1 at any time, and are
separately held by the remote controller. The level of the non-measurement point may be
calculated using the value of a certain ch parameter. Various types of terminal devices (including
so-called tablet PCs and smartphones) that can be used as a personal computer can be applied as
the remote controller, and the communication network can use various communication
interfaces, whether wired or wireless. Good.
[0040]
In the above description, the level of the downstream (output side) non-measurement point is
calculated based on the upstream (input side) measurement point and the ch parameter in the
signal processing path. The level of the upstream non-measurement point may be calculated
based on the level value detected and the ch parameter. However, in the case of sandwiching
something that performs non-linear processing such as EQ or Dyna, the input side needs to be a
measurement point as in the above description.
[0041]
1 digital mixer, 2 level meter display device, 10 CPU, 11 ROM, 12 RAM, 13 operators, 14
indicators, 15 waveform input units, 16 signal processing units, 17 waveform output units, 18
bus lines, 20 A inputs, 21 D input, 22 input patch, 23 input ch unit, 24 ST bus, 25 MIX bus, 26
ST output ch unit, 27 MIX output ch unit, 28 output patch, 29 A output, 30 D output, 41 Att, 42
EQ , Dyna, 43 Fader, 44 CHSW, 45 PAN, IM1, IM4 measurement points, IM2, IM5, SM1, SM2
non-measurement points
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20
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