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DESCRIPTION JP2004120321

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DESCRIPTION JP2004120321
In an audio signal processing apparatus such as a mixer apparatus, the number of monaural
output systems can be increased, the setting is easy, and the panel is not enlarged. SOLUTION:
Stereo signals L and R are outputted to an L signal line 11 'and an R signal line 12' via a duplex
volume 13. In the first mode, the mode changeover switches 14 and 15 are turned off, and the L
signal lines 11 and 11 'and the R signal lines 12 and 12' are connected to the stereo matrix 10 to
be used as a stereo output system. In the second mode, the mode changeover switches 14 and 15
are turned on, the L signal line 11 'is connected to the R signal line 12', and the R signal line 12
'is connected to the L signal line 11'. The stereo signals L and R are mixed (mixed) on the L signal
line 11 'and the R signal line 12', respectively, to form each monaural signal. [Selected figure]
Figure 1
Audio signal processing device
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
audio signal processing apparatus such as a mixer apparatus which causes a plurality of audio
signals to be separately output by passing through signal transmission processing units of a
plurality of systems. 2. Description of the Related Art Heretofore, there has been shown a circuit
of a mixer apparatus as shown in FIG. 2 and FIG. The circuit shown in FIG. 2 has a plurality of
signal transmission processing units 20 for transmitting stereo signals handled in the mixer
apparatus to a stereo matrix (stereo bus) 10 and outputting the stereo signals as they are. In
addition, there are also systems in which a plurality of circuits are separately provided to
generate monaural signals by mixing stereo signals handled internally, send the produced signals
to a monaural matrix (monaural bus), and output monaural signals. Further, in the circuit of FIG.
3, while having the same function as the circuit of FIG. 2, a single volume 30 is inserted into each
signal line and each signal line is branched to operate stereo range by operation of single volume
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30. Signals and monaural signals can be optionally generated and sent to the stereo matrix 10,
and stereo and monaural signals can be selected and output to the stereo matrix 10. [Patent
Document 1] Japanese Patent Application Laid-Open No. Hei 5-251950 [0005] A mixer
apparatus of this type is used in various concerts and musicals, etc., and it is used in various
ways. Yes, it uses very few stereo output channels and may require many mono output channels.
However, the conventional circuit of FIG. 2 has a problem that it can not cope with the case
where a monaural output system is required more than the number of monaural matrices
prepared. Further, the conventional circuit of FIG. 3 can be used as an output system of a
monaural signal of stereo matrix, and the number of monaural output can be increased even
when a usual monaural matrix is not sufficient. , The setting of the mixer apparatus is
complicated, and the panel tends to be large. An object of the present invention is to provide an
audio signal processing apparatus capable of obtaining a mixer apparatus which can increase the
number of monaural output systems, is easy to set, and does not increase the size of a panel. The
audio signal processing apparatus according to claim 1 of the present invention passes through a
plurality of signal transmission processing units for simultaneously processing a plurality of
audio signals, and passes through the signal transmission processing unit. An audio signal
processing apparatus having an output system processing unit for separately outputting the
output signals, wherein the signal transmission processing units of the plurality of systems
simultaneously control at least two audio signals simultaneously; A mode control operator for
selecting whether or not to mix the signals of the individual systems into the signals of another
system in the signal transmission processing unit of the plurality of systems, and the first mode is
selected by the mode control operator When the second mode is selected by the mode control
operator, the audio signal is output individually to the output system processing unit while being
controlled by the simultaneous control operator. Said simultaneous control operation And
outputting a state that is controlled by the child as a mixture to the output system processing
unit.
The first mode is selected by the mode control operator, and the audio signal is individually
output to the output system processing unit in a state controlled by the simultaneous control
operator to be a stereo output. Further, the second mode is selected by the mode control
operator, and the audio signal is controlled by the simultaneous control operator and output to
the output system processing unit as a mixed signal to be a monaural output. That is, two output
signals of matrices L and R can be used as monaural output signals. Furthermore, the plurality of
audio signals may be stereo signals, or a plurality of sets of signal processing units of the
plurality of systems and the output system processing units may be provided (a stereo matrix or
the like). Furthermore, it is further preferable to save space on the panel by setting the
simultaneous control manipulator as a coaxial rotary volume. DETAILED DESCRIPTION OF THE
INVENTION Embodiments of the present invention will be described below with reference to the
drawings. FIG. 1 is a circuit diagram of an essential part of the audio signal processing apparatus
according to the embodiment, and the audio signal processing apparatus according to this
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embodiment is a mixer apparatus. Although only two circuits of the signal transmission
processing unit 1 are illustrated in the figure, the signal transmission processing unit 1 is
provided with a plurality of systems such as four circuits (four systems), for example. In the
signal transmission processing unit 1, an L signal line 11 and an R signal line 12 to which a
plurality of stereo signals L and R (a plurality of audio signals) are input are respectively input to
the duplex volume 13. The dual volume 13 is a rotary volume in which two operators (not
shown) are coaxial and can operate the two operators simultaneously to adjust the volume of the
stereo signals L and R. The stereo signals L and R are signals or the like called group-outs which
mix and output a plurality of signals from a plurality of input ports. Mode switching switches 14
and 15 as mode control operators are respectively connected to the L signal line 11 'and the R
signal line 12' which have passed through the dual volume control 13, and the L signal line 11 'is
a mode. The R signal line 12 ′ is connected to the R signal line 12 ′ via the changeover switch
14, and the R signal line 12 ′ is connected to the L signal line 11 ′ via the mode change switch
15. Although the mode changeover switches 14 and 15 are simultaneously turned on / off by the
operation of a predetermined operation element, this operation element may be a dedicated
switch operation element or may be used as a switch operation element for controlling other
functions. It may be something. When the mode changeover switches 14 and 15 are turned off
(the state of FIG. 1), the L signal lines 11 and 11 'and the R signal lines 12 and 12' are
respectively connected to the stereo matrix (stereo bus) via the adder 16. The stereo signals L
and R are independently supplied to a stereo matrix (stereo bus) 10.
This is the first mode. On the other hand, when the mode changeover switches 14 and 15 are
turned on, the L signal line 11 'is connected to the R signal line 12', and the R signal line 12 'is
connected to the L signal line 11'. It is connected to a stereo matrix (stereo bus) 10 via a mixer
16. This is the second mode. Therefore, in this second mode, stereo signals L and R are mixed
(mixed) on L signal line 11 ′ and R signal line 12 ′, respectively, and this mixed signal, that is,
monaural signal is a stereo matrix (stereo bus). Supplied to 10 The stereo matrix (stereo bus) 10
is an output system processing unit. In addition, although a monaural output system dedicated to
monaural output is not illustrated or omitted, for example, only eight systems are separately
provided. Therefore, by turning on the mode changeover switches 14 and 15, one signal
transmission processing unit 1 can obtain two monaural outputs, and if necessary, using this
stereo output system , The number of monaural output systems can be increased. For example, if
there are four signal transmission processing units 1 (stereo output systems), the monaural
output system can be increased up to eight systems. Further, since the dual volume is used, the
number of operators on the panel surface of the mixer apparatus (arrangement number) is also
reduced, so the setting is simple and the panel does not become large. Although the mode
changeover switches 14 and 15 are simultaneously turned on / off in the above embodiment,
they may be independently turned on / off. Furthermore, in the second mode, the L and R signals
are mixed and the output level of the stereo matrix 10 rises, but if the gain of the adder 16 is
lowered simultaneously with the turning on of the mode changeover switches 14 and 15, The
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levels of the first mode and the second mode can be made constant. According to the audio signal
processing device of the present invention, the audio signals are individually output to the output
system processing unit in the first mode under the control of the simultaneous control operator,
and are used as a stereo output. Since the audio signal is controlled by the simultaneous control
operator in the second mode and output to the output system processing unit as a mixed output
so as to be a monaural output, the number of monaural output systems can be increased. It
becomes. Further, since the simultaneous control operator is a coaxial rotary volume, the setting
is easy and a mixer device which does not increase the size of the panel can be obtained.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a main part circuit diagram of an audio signal
processing apparatus according to an embodiment of the present invention. FIG. 2 is a circuit
diagram of an essential part of a conventional mixer apparatus. FIG. 3 is a circuit diagram of an
essential part of another conventional mixer apparatus. [Description of the code] 1: Signal
transmission processing unit, 10: stereo matrix, 11, 11 ′, L signal line, 12, 12 ′, R signal line,
13: double volume, 14, 15: mode switching switch
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