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DESCRIPTION JP2011024114

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DESCRIPTION JP2011024114
PROBLEM TO BE SOLVED: To enable storage and recall of parameters for one input channel, and
to appropriately set parameter values related to signal transmission from an input channel to a
mixing bus even when the type of mixing bus is different between storage and recall time. To be
able to call SOLUTION: In accordance with a save operation of a user, parameters of one input
channel stored in a current memory are saved as one preset together with a bus type of each
mixing bus at that time, and called by the user. When calling up the parameter of one preset
saved to the current memory according to the operation, the part where the saved bus type does
not match the bus type at the time of recalling (S24, S25), preset Parameters are converted to
parameters corresponding to the bus type at the time of calling and called (S27). [Selected figure]
Figure 9
デジタルミキサ
[0001]
The present invention relates to a digital mixer including a mixing bus for mixing audio signals
supplied from a plurality of input channels (ch), and capable of setting the type of monaural and
stereo for the pair of mixing buses.
[0002]
Conventionally, as digital mixers that are provided with mixing buses that mix audio signals
supplied from a plurality of input channels, and that can set monaural and stereo types for the
pair of mixing buses, for example, non-patent documents 1 and 2 and A digital mixer described in
Patent Document 1 is known.
10-04-2019
1
[0003]
In these digital mixers, the user can select and set whether each mixing bus functions as an
independent monaural bus or as a pair of stereo buses for each set of two mixing buses. it can.
This setting can be alternatively performed by the screen as shown in FIG. 3 in the digital mixer
described in Patent Document 1, and in the digital mixers described in Non-Patent Documents 1
and 2, bus pairing It can be done in the form of presence or absence.
[0004]
Also, apart from this, the digital mixers described in Non-Patent Documents 1 and 2 are not only
scene memories for storing a plurality of entire parameters used for mixing processing, but also
for parameters used for signal processing for one input channel. A plurality of sets of values are
stored as presets, and a ch library function is also provided which calls up any preset and sets it
as the value of a parameter of any input channel.
[0005]
“CS1D CONTROL SURFACE Instruction Manual”, Yamaha Corporation, 2002 (Especially its
Operation Manual (Basic Operation) p.39-43,65-67 and Reference Manual (Software) p.186,
187) “PM5D DIGITAL MIXING CONSOLE Instruction Manual, Yamaha Corporation, 2004
(Especially its p. 40-45, 245, 268-273, 283)
[0006]
JP 2007-53631 A
[0007]
By the way, when setting of the type of mixing bus is enabled, the types of parameters used for
signal processing in the path for sending a signal from the input channel to the bus will differ
depending on whether the type is monaural or stereo.
For example, when operating two mixing buses as independent monaural buses, two send levels
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and send-on parameters corresponding to each bus are included, and when functioning as a pair
of stereo buses, two are used. Include common send level, send on and pan parameters, and so
on.
[0008]
Therefore, for example, when the type of mixing bus differs between saving and recalling
parameters, if the saved preset contents are recalled as they are, parameters necessary to execute
signal processing according to the setting of the recalling type There was a problem that was not
obtained.
In order to cope with such a problem, for example, in the digital mixer described in Non-Patent
Document 1, the setting of the monaural / stereo (pair) of the mixing bus differs between the
content of the preset (at the time of storage) and the time of calling. In the above, it is performed
not to call out values of parameters related to signal transmission to buses having different
settings.
However, in such correspondence, there is a problem that the contents can not be totally
reflected even if the preset is called for the part where the setting is different between the time of
saving and the time of calling.
[0009]
The present invention solves such a problem, and enables storage and recall of parameters for
one input channel in a digital mixer capable of setting the type of monaural and stereo with
respect to a pair of mixing buses. An object of the present invention is to make it possible to
properly call up values of parameters related to signal transmission from an input channel to a
mixing bus even when the type of mixing bus is different at the time of calling.
[0010]
In order to achieve the above object, the digital mixer of the present invention is a mono or
stereo type of two mixing buses for mixing acoustic signals supplied from a plurality of input
channels and a bus type of the two mixing buses. Designating means for designating the
parameter, current memory for storing as many as the number of input channels of parameters
corresponding to the bus type designated by the designating means, and values of the
parameters stored in the current memory Based on the bus type designated by the designation
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unit and the corresponding input channel parameter stored in the current memory,
corresponding to each of the plurality of input channels, and to the corresponding input channel.
A plurality of levels supplied to the above two mixing buses by controlling the volume of the
input acoustic signal The parameters of one input channel stored in the current memory
according to the user's storage operation, the library for storing a plurality of presets, and the
bus type designated by the designating means as one preset Storage means stored in the library,
and a preset bus type of the one preset and a bus type designating the designation means
according to the user's call operation; If there is a match, as it is, if there is no match, it is
converted into a parameter according to the bus type specified by the specification means, and
the call means is called to call the current memory as a parameter of one input channel specified
according to the user operation. And are provided.
[0011]
In such a digital mixer, when the designating means designates monaural as the bus type, the
current memory stores two level parameters corresponding to each of the two mixed buses by
the number of the input channels. When the designating means designates stereo as the bus
type, it is preferable to store one level parameter and one pan parameter corresponding to the
two sets of mixed buses by the number of the input channels.
[0012]
Furthermore, when the calling means is stereo and the bus type designated by the designating
means is monaural, the level parameter corresponding to the combination of the two mixed
buses is Two level parameters corresponding to each of the two mixing buses are obtained by
adding or multiplying adjustment values for L and R according to the values of pan parameters
corresponding to the set of mixing buses in the book You should
[0013]
Alternatively, the calling means corresponds to each of the two mixing buses in the one preset
when the one preset bus type is monaural and the bus type designated by the designation means
is stereo. Based on the difference or ratio between the two level parameters, one pan parameter
value corresponding to the set of two mixing buses is determined, and the two level parameter
values corresponding to each of the two mixing buses are calculated. The value of one level
parameter corresponding to the set of two mixing buses may be determined based on at least one
and the value of one pan parameter determined.
[0014]
According to the digital mixer of the present invention as described above, it is possible to set the
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monaural and stereo types for the pair of mixing buses, and to enable storage and recall of
parameters for one input channel. Even when the type of mixing bus is different at the time of
calling, it is possible to appropriately call the value of the parameter related to the signal
transmission from the input channel to the mixing bus.
[0015]
It is a figure which shows the hardware constitutions of the digital mixer which is embodiment of
this invention.
It is a figure which shows in detail the structure of the signal processing performed by DSP
shown in FIG.
Similarly, it is a figure which shows the structure of the part regarding the input of the signal to
each ST bus | bath and MIX bus | bath among the signal processing in DSP.
It is a figure which shows the example of the MIX bus setting screen displayed on the digital
mixer shown in FIG.
It is a figure which similarly shows the example of a sending setting screen.
[0016]
It is a figure which shows the structure of the data stored in the current memory of the digital
mixer shown in FIG.
It is a figure which shows the structure of the data similarly stored in a preset library.
It is a flowchart of the process performed when CPU of the digital mixer shown in FIG. 1 has
instruction | indication of preservation | save of preset.
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Similarly, it is a flowchart of processing when there is a call instruction for preset. It is a graph
which shows the relationship between the adjustment value after decibel conversion and the
parameter value of pan which are used for conversion of a parameter. FIG. 17 is a graph showing
the relationship between the ratio of the send level corresponding to each of the two buses and
the pan parameter value. It is a graph which shows the relationship between the adjustment
value of linear notation corresponding to FIG. 10, and the parameter value of pan.
[0017]
Hereinafter, a mode for carrying out the present invention will be specifically described based on
the drawings. First, the configuration of a digital mixer according to an embodiment of the
present invention will be described. FIG. 1 is a block diagram showing the configuration of the
digital mixer. As shown in FIG. 1, the digital mixer 10 includes a CPU 11, a flash memory 12, a
RAM 13, an external device input / output unit (I / O) 14, a display 15, an operator 16, a
waveform I / O 17, a signal processing unit (DSP ), Which are connected by a system bus 19).
And it has a function which performs various signal processing to an acoustic signal inputted
from a plurality of input channels (ch), and outputs it from a plurality of output channels.
[0018]
The CPU 11 is a control unit that generally controls the operation of the digital mixer 10. By
executing a required program stored in the flash memory 12, data and signals in the external
device I / O 14 and the waveform I / O 17 are obtained. It controls the display of the input /
output and the display 15, and detects the operation of the operation element 16 and performs
processing such as setting / changing of parameter values and controlling the operation of each
part according to the operation. The flash memory 12 is a rewritable non-volatile storage unit
that stores control programs and the like executed by the CPU 11. The RAM 13 is a storage unit
that temporarily stores data to be stored or that is used as a work memory of the CPU 11.
[0019]
The external device I / O 14 is an interface for connecting various external devices and
performing input and output. For example, an interface for connecting an external display, a
mouse, a keyboard for character input, an operation panel, etc. is prepared . Then, even if the
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display 15 and the operating element 16 of the main body are configured to be very simple, it is
conceivable to be able to perform parameter setting / change and operation instruction by
utilizing these external devices. .
[0020]
The display 15 is a display means for displaying various information under the control of the
CPU 11, and can be constituted by, for example, a liquid crystal panel (LCD) or a light emitting
diode (LED). In the example described here, the digital mixer 10 includes, as the display 15, an
LCD of a size capable of displaying a graphical user interface (GUI) for at least referring to
parameter values and accepting settings.
[0021]
The operating element 16 is for receiving an operation on the digital mixer 10, and can be
configured by various keys, buttons, a rotary encoder, a slider, and the like. Here, a touch panel
stacked on the LCD as the display 15 is also used.
[0022]
The waveform I / O 17 is an interface for receiving the input of the acoustic signal to be
processed by the DSP 18 and outputting the processed acoustic signal. Then, for this waveform I
/ O 17, one A / D conversion board capable of analog input of 4 channels (ch), one D / A
conversion board capable of analog output of 4 channels, one 8 ch A plurality of digital input /
output boards capable of digital input / output can be mounted in combination as appropriate,
and signals are input / output via these boards in practice.
[0023]
The DSP 18 includes a signal processing circuit, performs various signal processing such as
mixing and equalizing on an acoustic signal input from the waveform I / O 17 according to
various processing parameters set as current data, and outputs the processed signal to the
waveform I / O 17 Signal processing unit. The current data including the parameters used for
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this process is stored in the current memory provided on the RAM 13 or on the memory
provided in the DSP 18 itself, and the user uses the display 15 and the operating element 16 to
You can check or change the value.
[0024]
Next, FIG. 2 shows the configuration of signal processing performed by the DSP 18 shown in FIG.
1 in more detail. As shown in this figure, the signal processing in the DSP 18 has an input patch
33, an input ch 40, a stereo (ST) bus 60, a mixing (MIX) bus 70, an ST output ch 81, a MIX
output ch 82, and an output patch 34.
[0025]
Then, in the DSP 18, each of the 24 input channels 40 is patched (connected) to either the analog
input port 31 or the digital input port 32 prepared so as to correspond to the input terminal in
the waveform I / O 17. In this case, after adjusting the characteristics of the amplitude and
frequency of the signal input from the patched port using an attenuator, equalizer, etc., the signal
after being processed to any of ST bus 60 and MIX bus 70 of 12 systems Send out
[0026]
The ST bus 60 and each MIX bus 70 mix the signals input from each input ch 40, and the signal
mixed on the ST bus 60 which is the main bus is mixed on the ST output ch 81 and the signal
mixed on the MIX bus 70 is It is output to the 12ch MIX output ch 82 provided corresponding to
each system.
Then, in each of the output channels 81 and 82, the characteristics of the signal input from the
corresponding bus are adjusted by an equalizer, a compressor or the like, and the processed
signal is made to correspond to the output terminal by the output patch 34 to the waveform I / O
17. The patch is applied to the analog output port 35 and the digital output port 36 prepared in
the above and output from the patch destination output port. The contents of the signal
processing by these units provided in the DSP 18 can be controlled by setting the parameter
values corresponding to the units stored in the current memory, and the functions of the units
are realized by software. However, it may be realized by hardware.
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[0027]
Next, FIG. 3 shows a configuration of a portion regarding signal input from each input channel to
the ST bus and the MIX bus in signal processing in the DSP 18. As shown in FIG. 3, an attenuator
41, an equalizer 42, a compressor 43, a ch fader 44, and an on switch 45 are provided for each
input ch 40. Further, a TO_ST (two-to-stereo) switch 46 and a pan 47 are provided in a path for
inputting a signal to the ST bus 60, which is ahead thereof.
[0028]
A signal input to such an input channel 40 is adjusted to a level suitable for signal processing
based on the attenuator parameter in the attenuator 41, and its frequency characteristic is
adjusted based on the equalizer parameter in the equalizer 42. The amplitude is adjusted based
on the dynamic change characteristic based on the compressor parameter, and the ch fader 44 is
adjusted based on the fader parameter to a level suitable for mixing on the ST bus. The signal
output from the ch fader 44 passes through the on switch 45 and the TO_ST switch 46 if the
corresponding on parameter is on, respectively, and the pan 47 separately for L and R based on
the stereo pan parameter. The level is adjusted and input to the L and R ST buses 60,
respectively.
[0029]
In addition, in the path for inputting a signal to each MIX bus 70, for each group consisting of
two buses, a sending unit corresponding to the type of the bus is provided. Specifically, for buses
set to monaural, pre / post (PRE / POST) switches 51a and 51b, send level faders 52a and 52b,
and send on switches 53a corresponding to the two buses, respectively. , 53b are provided. In
FIG. 3, the first and second MIX buses are in the monaural state.
[0030]
Then, in the sending unit, for each destination bus, in the PRE / POST switches 51a and 51b, a
position corresponding to the preparameter (PRE1, PRE2) of the path of the input channel (in
front of the ch fader 44, in the case of pre) If it is a post, the signal of the on switch 45 is
selected, and the selected signal is adjusted in the send level faders 52a, 52b to a level suitable
for mixing on the corresponding bus based on the send level parameters (SL1, SL2) If the
corresponding on parameter (ON1, ON2) is on, the send on switches 53a and 53b are passed
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through and are input to the destination bus.
[0031]
In addition, for buses that are set to stereo, a sending unit including a pre / post (PRE / POST)
switch 54, a send level fader 55, a send on switch 56, and a pan 57 common to two buses is
provided. ing.
In FIG. 3, the third and fourth MIX buses are in this stereo state.
[0032]
Then, in the sending unit, a signal at a position according to the preparameter (PRES) in the path
of the input channel is selected in the PRE / POST switch 54, and the selected signal is sent in the
send level fader 55. The level is adjusted based on the level parameter (SLS), and the send on
switch 56 is passed if the corresponding on parameter (ONS) is on, and the pan 57 separates for
L and R based on the pan parameter (PAN) Level control and input to two buses in the group.
Here, of the two buses, the bus with the smaller number is for L and the larger bus is for R.
[0033]
Although only the configuration of one input channel 40 is shown in detail in FIG. 3, the other 23
input channels also have the same configuration, and in the ST bus 60 and each MIX bus 70,
those 24 input channels are shown. It is possible to mix the signals input from. Here, the type of
the bus of each group can be arbitrarily set by the user, and is designated by the CPU 11
functioning as the designating means in accordance with the contents of the setting.
[0034]
FIG. 4 shows an example of a MIX bus setting screen for receiving the setting of the bus type.
The MIX bus setting screen 100 shown in this figure is a GUI that is displayed on the touch
screen provided on the operation panel of the digital mixer 10 according to the user's operation,
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and for each group of the MIX bus, the bus of that group is set And a bus pair setting unit 110
for receiving a setting operation of the type.
[0035]
Then, display and setting operation acceptance for stereo and monaural are performed by the
stereo button 111 and the monaural button 112 provided in the bus pair setting unit 110. The
type of bus is to set "about a destination bus", not to each input channel. Then, when the type of
bus is changed, in response to this, the configuration of the signal transmission path for the MIX
bus of that group is changed in all the input channels.
[0036]
When this change is made, a predetermined initial value is set to the parameter corresponding to
that position. Specifically, the initial value of the preparameters (PRE1, PRE2, PRES) is “post”,
and the initial value of the send level parameters (SL1, SL2, SLS) is “−∞ dB (zero level)”, The
initial value of the on parameter (ON1, ON2, ONS) is "ON", and the initial value of the pan
parameter (PAN) is "± 0 (center)". However, as in the case of the preset call described later, the
values of the parameters before the change may be converted into the values of the parameters
according to the type after the change.
[0037]
Next, FIG. 5 shows a display example of a transmission setting screen for receiving setting of
parameters related to signal transmission to the MIX bus among parameters related to input
channels. The transmission setting screen 200 shown in this figure is also a GUI that is displayed
on the touch screen provided on the operation panel of the digital mixer 10 according to the
user's operation. And it is a screen for performing the display of the value of the parameter
regarding the signal transmission to each MIX bus of 12 systems from one input channel, and
reception of edit operation.
[0038]
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One target input channel is any one selected automatically or automatically according to the
user's operation, and is displayed on the channel display unit 201. The transmission setting
screen 200 is provided with bus pair setting units 210 and 220 corresponding to the respective
groups of the MIX bus 70. Reference numeral 210 corresponds to a monaural group, and
reference numeral 220 corresponds to a stereo group, both of which are areas for handling
parameters related to signal transmission to the bus of the group. Since the number and types of
parameters to be set are different between stereo and monaural as described above, the screen
configuration is also different.
[0039]
First, the monaural bus pair setting unit 210 is provided with a monaural bus setting unit 211
corresponding to each of two buses in the group. Then, in each of the monaural bus setting units
211, the send level parameters (SL1, SL2) of the send level faders 52 (a, b) in the transmission
path for each bus by the level knob 212, the PRE / POST button 213 and the on button 214.
Display values of the pre-parameters (PRE1 and PRE2) of the PRE / POST switch 51 (a and b) and
on parameters (ON1 and ON2) of the send-on switch 53 (a and b) be able to. 」
[0040]
The stereo bus pair setting unit 220 is a setting unit common to the two buses in the group, and
is sent to the two buses by the pan knob 221, the level knob 222, the PRE / POST button 223,
and the on button 224. Values for the pan parameter (PAN) of the pan 57 in the path, the send
level parameter (SLS) of the send level fader 55, the preparameter (PRES) of the PRE / POST
switch 54, and the ON parameter (ONS) of the send on switch 56 Display and editing operations
can be accepted.
[0041]
Next, a storage format of parameters used for signal processing in the digital mixer 10 will be
described.
In the digital mixer 10, as described above, the values of the parameters used for signal
processing in the DSP 18 are stored in the current memory. Therefore, FIG. 6 shows the
configuration of data to be stored in the current memory.
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[0042]
As shown in FIG. 6, data to be stored in the current memory can be roughly divided into input
patch parameters which are parameters related to the operation of the input patch 33, input
channel parameters which are parameters related to the operation of the input channel 40, ST
output ch81 and MIX output. These are an output ch parameter which is a parameter related to
the operation of the ch 82, an output patch parameter which is a parameter related to the
operation of the output patch 34, and other parameters. Among these, since part of the input
channel parameter and the output channel parameter are parts related to the features of this
embodiment, they will be described in more detail.
[0043]
First, as input channel parameters, values of parameters used in each signal processing element
shown in FIG. 3 are stored for each of the 24 input channels 40. The parameters for each
channel include an attenuator parameter used for processing by the attenuator 41, an equalizer
parameter used for processing by the equalizer 42, a compressor parameter used for processing
by the compressor 43, and a fader parameter used for processing by the ch fader 44. And an on
parameter used for processing at the on switch 45. The transmission parameter to the ST bus (ST
bus transmission parameter) includes the ON parameter of the TO_ST switch 46 and the pan
parameter indicating the value of the sound image localization position of the pan 47.
[0044]
Furthermore, the parameters for each input channel also include MIX bus transmission
parameters used in the processing of the signal transmission path to the MIX bus 70. Although
storage areas for transmission parameters for this MIX bus are prepared for each bus group, the
types and contents of parameters for which values are actually stored differ depending on the
type of MIX bus as described above. As shown.
[0045]
[0046]
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Next, as output ch parameters, values of parameters used in respective signal processing
elements such as a compressor, an equalizer, a fader and the like included in the ch are stored for
each of the ST output ch81 and the 12 ch MIX output ch.
In addition to this, the MIX bus type, which is information for specifying the type of MIX bus of
each group, is also stored as part of the output ch parameter.
[0047]
Further, in the digital mixer 10, among the contents of the current memory described above, a
set of parameter values related to input channels for one channel can be stored as a preset in the
preset library. This storage is performed in accordance with a storage instruction specifying the
input channel number and the storage destination preset number by the user.
[0048]
Also, the stored preset can be recalled to the current memory as a parameter value for an
arbitrary input channel, and can be reflected on the content of signal processing executed by the
digital mixer 10. This call is also made in response to a call instruction specifying the preset
number of the caller and the number of the input channel of the callee by the user. And one of
the features of this embodiment is the operation at the time of saving and recalling this preset.
Therefore, this point will be described below.
[0049]
First, FIG. 7 shows the configuration of data to be stored in this preset library. As shown in this
figure, in the digital mixer 10, a plurality of presets can be stored in the preset library, and an
area for storing Np presets corresponding to the preset number Np is provided.
[0050]
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Then, among the contents of each preset, the contents from the attenuator parameter to the
other parameters are exactly the same as the data format of the parameters related to the input
channel for one channel in the current memory shown in FIG. Therefore, the data format of the
MIX bus transmission parameters will depend on the type of MIX bus of each group at the time
of storage. Therefore, in order to easily grasp this data format, information on the type of MIX
bus is also copied from the output channel parameter at the time of storage and included in the
contents of the preset. Moreover, in addition to the above, a preset name for facilitating
identification of the preset can also be registered.
[0051]
Among the preset data described above, what is copied to the current memory at the time of
calling is only the contents from the attenuator parameter to the other parameters, which are
parameters related to the input channel. Also, the preset library shown in FIG. 7 may be provided
in the RAM 13 so that the contents may be erased when the power is turned off, or the contents
edited on the RAM 13 may be stored in the flash memory 12 and the contents may be kept even
after the power is turned off. You may hold it.
[0052]
Next, FIG. 8 shows a flowchart of processing executed by the CPU 11 when there is a preset save
instruction. When the CPU 11 of the digital mixer 10 detects a save instruction to the p-th preset
for the i-th input channel by the user using a user interface (not shown), it starts the instruction
shown in the flowchart of FIG.
[0053]
Then, first, the preset name input by the user or automatically set is stored in the storage area of
the p-th preset in the preset library (S11). Next, the information of the MIX bus type of each
group among the output channel parameters stored in the current memory is stored in the
storage area of the p-th preset (S12). Thereafter, the values of the parameters related to the i-th
input channel stored in the current memory are stored in the storage area corresponding to the
p-th preset (S13 to S16), and the process is ended.
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[0054]
In the above process, the CPU 11 functions as a storage unit, and can save the parameters of one
input channel and the type of each MIX bus in the preset library as the preset shown in FIG.
[0055]
Next, FIG. 9 shows a flowchart of processing executed by the CPU 11 when there is a preset call
instruction.
When the CPU 11 of the digital mixer 10 detects a calling instruction for calling the pth preset
by the user to the ith input channel with a user interface (not shown), it starts an instruction
shown in the flowchart of FIG.
[0056]
Then, first, from the p-th preset attenuator to the ST bus transmission parameter, the values of
the parameters of the part having the common configuration regardless of the MIX bus type,
corresponding storage of the parameters for the i-th input channel of the current memory Write
in the area (S21, S22). After that, while sequentially incrementing the variable n from 1 to 6 (S23,
S28, S29), processing concerning writing of the value of the MIX bus sending parameter in steps
S24 to S27 is performed.
[0057]
That is, first, the type of MIX bus of the n-th group is compared between the p-th preset relating
to the call and the current memory (S24). Then, if this matches (S25), it is known that the format
of the sending parameter for the MIX bus of the nth group matches between the pth preset and
the current memory. The value of the sending parameter for the MIX bus of the n group is
written as it is in the storage area corresponding to the parameter of the i-th input channel of the
current memory (S26).
[0058]
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On the other hand, if they do not match in step S25, the format of the sending parameter for the
MIX bus of the n-th group is different between the p-th preset and the current memory, so
writing can not be appropriately performed as it is . Therefore, the value of the sending
parameter for the MIX bus of the nth group in the p-th preset is subjected to a predetermined
conversion described later to convert it to the value of the parameter of the format
corresponding to the bus type in the current memory Are written in the storage area
corresponding to the parameter of the i-th input channel in the current memory (S27). Then,
when these processes are completed for all the groups of n = 1 to 6, the other parameters are
written as in steps S21 and S22 (S30), and the process is ended.
[0059]
In the above processing, the CPU 11 functions as a calling unit, and can call the contents of the
preset stored in the preset library as a parameter of one arbitrary input channel. In this case,
even if the type of MIX bus is different between the time of storing the preset and the time of
calling, the user does not have to be aware of the difference in type because the parameter
format is automatically converted.
[0060]
Next, a conversion method of the form of this parameter will be described. In this conversion
method, even if a signal transmission path corresponding to the type set in the bus at the time of
calling is used, the signal as close as possible to the signal supplied to each MIX bus under the
storage condition including the type is In order to be able to supply to the MIX bus, the value of
each parameter corresponding to the type of bus set at the time of calling is obtained based on
the value of each parameter in the preset.
[0061]
The specific content of the process differs between the process of converting what was monaural
at the time of storage into a parameter of stereo and the process of converting what was stereo
at the time of storage into a parameter of monaural. It is shown. In this table, for each direction
of conversion, necessary parameters in converted format are shown in the left column, and
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calculation methods of the values are shown in the right column (see Table 1 above for the
names of parameters).
[0062]
[0063]
Hereinafter, the calculation method of the value of each parameter will be described more
specifically.
First, when converting a stereo parameter to a monaural parameter, the send level faders 52a
and 52b are provided so that level signals after level adjustment by the send level fader 55 and
distribution by the pan 57 are supplied to each bus. Adjust the gain. For this purpose, the gain of
the send level fader 55 for stereo is adjusted by the adjustment value indicating the distribution
ratio of left and right by the pan 57, and the send level of the send level fader corresponding to
the L side bus and the R side bus Determine the parameters
[0064]
There are various ways to determine the adjustment value used here. For example, as seen in
Japanese Patent No. 3266045, the position constant of the sound image localization position is x
(where x = 0, L = 100%, x = The adjustment value .DELTA.L1 on the L side and the adjustment
value .DELTA.L2 on the R side can be obtained by the following equations 1 and 2, assuming that
the center is at .pi. / 2 and R100% at x = .pi. ΔL1 = cos (x / 2) (Eq. 1) ΔL2 = sin (x / 2) (Eq. 2)
However, the adjustment value determined by the above equation is a signal after gain
adjustment by the send level fader 55. Is an adjustment value of a linear expression showing the
ratio of the level of the signal and the level of the signal after gain adjustment by the send level
faders 52a and 52b.
[0065]
Therefore, FIG. 10 shows a graph in which the relationship between the adjustment values ΔL1
and ΔL2 in decibel conversion and the parameter value of pan is obtained. The minimum value
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of the adjustment value was set to -50 dB in consideration of the settable range of the parameter.
In practice, the values of the adjustment values ΔL1 (PAN) and ΔL2 (PAN) corresponding to the
pan parameter values may be stored in the conversion table.
[0066]
Then, when the parameter value is in decibel representation, as shown in Table 1, these
adjustment values are added to the send level parameter SLS of the fader 55 (corresponding to
multiplication in the linear representation) to obtain the send level fader 52a, The send level
parameter to be set to 52b can be determined. Further, with regard to the states of the PRE /
POST switches 51a and 51b and the states of the on switches 52a and 52b, the states of the
stereo PRE / POST switch 54 and the on switch 56 may be adopted as they are.
[0067]
On the other hand, even when converting a monaural parameter to a stereo parameter, it is
preferable that the signal of the send level fader 55 be distributed so that the signal after
distribution by the pan 57 matches the signal supplied to each bus in the monaural state. The
sound image localization position of the gain and pan 57 is determined. That is, the reverse
conversion to the above-described SLS → SL1, SL2 is performed.
[0068]
Here, since tan (x / 2) = ΔL 2 / ΔL 1 from the above formulas 1 and 2, x = 2 × tan <−1> (ΔL 2
/ ΔL 1) (formula 3). Then, since ΔL 2 / ΔL 1 indicates the volume ratio of L and R when one
system of signal is divided into L and R, the sound image localization position can be determined
based on the volume ratio of L and R from Equation 3. I know what I can do.
[0069]
FIG. 11 is a graph showing the relationship between the ratio of the send levels corresponding to
each of the two buses and the pan parameter (PAN) based on the equation (3). However, since
the actual send level parameters (SL1, SL2) are expressed in decibels, the horizontal axis here is
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not linear but decibels. The ratio of the send levels in that case is the difference between SL2 and
SL1. In practice, each rank of the difference value of the send level parameter and the
corresponding pan parameter value are stored in the conversion table, and this table is searched
based on the value of SL2-SL1, and the pan parameter PAN is obtained. The value of can be
determined.
[0070]
Also in the case of this conversion, the relationship of SL1 = SLS + ΔL1 (PAN) and SL2 = SLS +
ΔL2 (PAN) holds, as in the case of conversion from stereo to monaural. Therefore, if the value of
PAN is determined, SLS = SL1-.DELTA.L1 (PAN) or SLS = SL2-.DELTA.L2 (PAN), the value of the
send level of one of the monaural buses and the pan parameter determined above Based on the
values, stereo send level values can be determined. Here, it is preferable to use an equation that
uses the larger one of SL1 and SL2 out of the two equations. In the case of the decibel
representation, the error of the send level parameter (SLS) which is required for such can be
reduced.
[0071]
Further, with regard to the states of the PRE / POST switch 54 and the on switch 56, if the states
of the PRE / POST switches 51a and 51b corresponding to the two buses in monaural and the
states of the on switches 52a and 52b coincide with each other, The state may be adopted as it is.
[0072]
On the other hand, when the state is different for each bus in monaural, it is not possible to use
the stereo transmission path to set each bus to supply the same signal as the signal indicated by
the monaural parameter.
However, here, with regard to the PRE / POST switch 54, if it is both of the PRE / POST switches
54 as PRE, if it is based on the setting contents of the preset, it is assumed that it is POST, As for
the on switch 56, both monaural ones are ON, and the other is OFF.
[0073]
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In the digital mixer 10, by performing the conversion process as described above in step S27 of
FIG. 9, even when the type of bus is different between storing and calling a preset, calling is
performed while making the most of the setting contents of the preset. Presets can be recalled in
a form that can be used in time conditions.
[0074]
This is the end of the description of the embodiment, but the configuration of the apparatus, the
specific processing contents, the display example of the screen, the operation method, the
parameter configuration, the conversion method, and the like are not limited to those described
in the above embodiment. Of course.
For example, in the above-described embodiment, an example in which the send level parameter
of the send level fader is a digital representation has been described. However, it is not a problem
even if it is a linear representation.
[0075]
In this case, as shown in FIG. 12, linear values are prepared for ΔL1 and ΔL2 corresponding to
the respective PAN values, and SL1 = SLS × ΔL1 (PAN) and SL2 = SLS × ΔL2 (PAN) As
described above, by adding these adjustment values to the send level parameter SLS of the fader
55, the value of the send level parameter to be set in each of the send level faders 52a and 52b
can be obtained. Although illustration is abbreviate | omitted about the figure corresponding to
FIG. 11, a horizontal axis is set to SL2 / SL1, and the same conversion table can be produced and
utilized.
[0076]
Further, with regard to the states of the PRE / POST switch 54 and the on switch 56 when
converting a monaural parameter to a stereo parameter, any one of the two monaural buses, for
example, other than those shown in Table 2, for example It is also conceivable to take over the
setting for the smaller bus number as it is.
[0077]
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In the above-described embodiment, an example in which the MIX bus 70 includes six groups
and twelve systems has been described. However, the present invention can be applied to the
digital mixer 10 provided with at least one group and two MIX buses.
Also, the parameter conversion process as shown in Fig. 9 is applied only to some buses, and for
other buses, the call is aborted as an error if there is a difference in type between saving and
calling presets. Or, different parts of the type may be considered as not making calls.
[0078]
Also, the digital mixer 10 can be realized not only by dedicated hardware but also as a function
of a DAW (digital audio workstation) application operated on a PC. In addition, the configurations
and modifications described above can be combined appropriately and applied as long as no
contradiction arises.
[0079]
As is apparent from the above description, according to the digital mixer of the present invention,
the monaural and stereo types can be set for a pair of mixing buses, and storage and recall of
parameters for one input channel can be performed. In the above, even when the type of mixing
bus differs between storing and calling, it is possible to appropriately call out the values of
parameters related to the signal transmission from the input channel to the mixing bus.
Therefore, the operability of the digital mixer can be improved by applying the present invention.
[0080]
DESCRIPTION OF SYMBOLS 10 ... Digital mixer, 11 ... CPU, 12 ... Flash memory, 13 ... RAM, 14 ...
External-device I / O, 15 ... Display, 16 ... Operator, 17 ... Waveform I / O, 18 ... DSP, 19 ... System
Bus, 40: Input ch, 44: ch fader, 45: on switch, 46: TO_ST switch, 47, 57: pan, 51a, 51b, 54: PRE /
POST switch, 52a, 52b, 55: send level fader, 53a , 53b, 56: Send on switch, 60: ST bus, 70: MIX
bus, 81: ST output ch, 82: MIX output ch
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