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JPH04281634

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH04281634
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
signal processing apparatus such as a mixer.
[0002]
It is known to provide an insertion terminal or jack in the mixer section of a multi-channel tape
recorder (multi-track recorder) and to selectively connect an effect circuit (effector) here. The
effector is for giving some effect to the audio signal, and includes an equalizer circuit that
changes the frequency characteristic, a circuit that distorts the waveform, and the like.
[0003]
In order to selectively connect an effector to a signal transmission line, a stereo plug 1 is inserted
into an insertion jack connected to the transmission line as shown in FIG. One end of each of the
signal transmission lines 4 and 5 is connected to 3, the first and second monaural plugs 6 and 7
are connected to the other end of each of the signal transmission lines 4 and 5. There is known a
method in which the effector 8 is connected in series to the transmission line of the mixer circuit
by inserting the monaural plug 6 and inserting the second monaural plug 7 into the output jack
10. The chip 2 of the stereo plug 1 is connected to one of the signal transmission lines divided in
the mixer circuit, and the ring 3 is connected to the other of the divided signal transmission lines.
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1
[0004]
Conventional high-end mixers have an equalizer (frequency compensation circuit), which is one
type of effector, for each channel.
[0005]
By the way, in order to selectively connect the effector 8 to a signal transmission line of a signal
processing circuit such as a mixer circuit, a special bifurcated cord as shown in FIG. 7 is used. For
example, connection is not only troublesome but also expensive.
Moreover, since it is rare to simultaneously use the equalizer of each channel of the mixer, the
utilization factor of the equalizer is extremely low.
[0006]
Therefore, an object of the present invention is to provide a signal processing apparatus capable
of easily achieving selective connection of signal processing circuits such as effectors. Another
object of the present invention is to provide a signal processing device capable of facilitating
selective connection of the signal processing circuit and enhancing the utilization of the signal
processing circuit.
[0007]
A first invention for achieving the first object is a transmission line, and a signal processing
circuit for selectively connecting in series to the transmission line. A first jack provided in the
transmission line, a second jack provided in the signal processing circuit, and first and second
plugs inserted into the first and second jacks. A connector, the first and second plugs each
comprising a tip and a ring, the first jack being a first contact spring connected to the tip of the
first plug; A second contact spring connected to a ring of one plug, and when the first plug is not
inserted into the first jack, electricity is generated between the first contact spring and the
second contact spring And the first plug is connected to the first A contact configured to release
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2
an electrical connection between the first contact spring and the second contact spring when
inserted into the jack, for connecting the first and second contact springs The first contact spring
is connected to one of the transmission lines divided into two, and the second contact spring is
connected to the other of the divided transmission lines, and the second jack is connected to the
second transmission line. A third contact spring connected to the tip of the plug and a fourth
contact spring connected to the ring of the second plug, the third contact spring comprising a
pair of terminals of the signal processing circuit The present invention relates to a signal
processing apparatus, which is connected to one side and the fourth contact spring is connected
to the other of the pair of terminals. According to the second aspect of the present invention, the
relay apparatus can be provided, and the second and third jacks can be provided here.
[0008]
A second invention for achieving the above second object is the first and second signal input
terminals, the first and second signal output terminals, and the first and second signal output
terminals. First and second signal processing circuits provided between the signal input terminal
and the first and second signal output terminals, and the first signal input terminal and the first
signal output terminal A third signal processing circuit selectively connected to the first signal
transmission line between the second signal transmission line and the second signal transmission
line via the switching circuit; A first jack connected to a signal transmission line, and a second
jack connected to the third signal processing circuit, and first and second jacks connected to the
first and second jacks; By inserting a plug and connecting them to each other, the third signal
processing circuit is A signal processing apparatus related to the signal processing apparatus
characterized in that the third signal processing circuit is separated from the first signal
transmission line by the switching circuit when serially connected to the second signal
transmission line. It is.
[0009]
General purpose stereo plugs can be used as the first and second plugs in the first invention.
This connection is easily achieved because the signal processing circuitry is connected by the
combination of the first and second jacks and the first and second plugs. The third jack of the
repeater according to claim 2 enables the additional connection of further signal circuits.
[0010]
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Since the third signal processing circuit in the second invention has a jack, it can be easily
connected to the second signal transmission line. As a result, the third signal processing circuit
can be used alternatively in the first and second signal processing circuits, and the utilization
factor is increased.
[0011]
Next, a mixer according to an embodiment of the present invention will be described with
reference to FIGS. 1 to 4.
[0012]
FIG. 1 shows the main part of the mixer.
Although only the first and second channels are shown here, the actual device has more
channels.
[0013]
First and second input terminals 11 and 12 and first and second output terminals 13 and 14 in a
jack configuration for connecting an audio signal source such as a microphone Signal processing
circuits 15, 16, first and second buffer circuits 17, 18, and first and second master faders 19, 20
are sequentially connected. Further, a third signal processing circuit 21 is connected between the
first buffer circuit 17 of the first channel and the first master fader 19.
[0014]
The first and second signal processing circuits 15 and 16 have input gain adjusters 24 and 25,
jacks 26 and 27, and faders connected to the first and second signal transmission lines 22 and
23, respectively. 28 and 29, buffer circuits 30 and 31, and pans 32 and 33. The outputs of the
pans 32, 33 are connected to the master buses 34, 35 respectively. The master buses 34, 35 are
connected to the buffer circuits 17, 18.
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[0015]
The jacks 26 and 27 have a first metal contact spring 38 called a tip, a second metal contact
spring 39 called a ring, and a metal sleeve 40. Each has a contact 41 which works as a
transmission path forming switch. The first signal transmission line 22 is divided into one line 22
a and the other line 22 b at the output stage of the gain regulator 24, and one line 22 a is
connected to the first contact spring 38 of the jack 26, and the other The line 22 b is connected
to the second contact spring 39 and the contact 41. The second transmission line 23 is divided
into one line 23 a and the other line 23 b at the output stage of the gain adjuster 25, and one line
23 a is connected to the first contact spring 38 of the jack 27 and the other line 23 b is
connected to the second contact spring 39 and the contact 41. The contact points 41 of the jacks
26 and 27 are in contact with the first contact spring 38 when the plug is not inserted to connect
the transmission lines 22a, 22b and 23a and 23b which are divided, and when the plug is
inserted, the first contact spring 38 is connected. Separates from the contact 41. The two jacks
26 and 27 are switch terminals with a contact point 41 added to a general stereo jack to enable
insertion of an effector, so these are referred to as insertion jacks.
[0016]
The third signal processing circuit 21 comprises an equalizer circuit (frequency compensation
circuit) 42, two jacks 43 and 44, and a switching circuit 45. The jack 43 has a third contact
spring 46 made of metal called a tip, a fourth contact spring 47 made of metal called a ring, and
a sleeve 48 made of metal for general stereo use. I'm Jack. This jack 43 is called an input /
output jack in order to distinguish it from the insertion jacks 26 and 27.
[0017]
The jack 44 has the same structure as the insertion jacks 26, 27 and has a first contact spring 38
as a tip, a second contact spring 39 as a ring, a sleeve 40, and a contact 41. The jack 44 is used
to connect another effector.
[0018]
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The switching circuit 45 has contacts a, b, c, d, e, f and movable contacts g, h, i. The first movable
contact g contacts one of the contacts a and b, the second movable contact h contacts one of the
contacts c and d, and the third movable contact i is a contact e Contact one of f and f. The three
movable contacts g, h, i are configured to interlock, and are connected to the contacts a, c, e as
shown in FIG. 3 when the equalizer circuit 42 is connected to another channel, and the equalizer
circuit 42 is When connecting to one channel, the contacts b, d and f are closed as shown in FIG.
The switching circuit 45 can be replaced with six analog switches corresponding to the contacts
a to f.
[0019]
The connection in the third signal processing circuit 21 will be described in detail. The input
terminal 42a of the equalizer circuit 42 is connected to the third movable contact i, and the
output terminal 42b of the equalizer circuit 42 is an insertion jack 44. Is connected to the first
contact spring (tip) 38 of FIG. The first and sixth contacts a and f of the switching circuit 45 are
connected to the buffer circuit 17, respectively, and the second and third contacts b and c are
connected to the second contact spring (ring) 39 of the insertion jack 44, respectively. It is
connected. The fourth and fifth contacts d and e are connected to the third contact spring (tip) of
the input / output jack 43, respectively. The first movable contact g is connected to the master
fader 19, and the second movable contact h is connected to the fourth contact spring (ring) 47 of
the input / output jack 43. The contact point 41 of the insertion jack 44 is connected to the
second contact spring 39 and contacts the first contact spring 38 when the plug is not inserted.
[0020]
FIG. 2 shows in principle the connection cord 49 with the insertion jacks 26 or 27 and the first
and second plugs 47, 48 inserted into the input / output jack 43. The first and second plugs 47,
48 are common stereo plugs, each having a tip 50, a ring 51 and a sleeve 52, which are
electrically isolated from one another. The tips 50 of the two plugs 47 and 48 are mutually
connected by a signal line 53, the two rings 51 are connected by a signal line 54, and the two
sleeves 52 are connected by a shield conductor 55.
[0021]
[Operation] Connect a signal source such as a microphone to input terminals 11 and 12 and
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connect a tape recorder to output terminals 13 and 14 to record audio signals of the first and
second channels on multitrack magnetic tape. At this time, when the equalizer circuit 42 is used
in the first channel, movable contacts g, h, i are put on the contacts b, d, f as shown in FIG.
Thereby, the output of the buffer circuit 17 passes through the contact f, the movable contact i,
the equalizer circuit 42, the first contact spring 38 of the insertion jack 44, the contact 41, the
contact b, the contact b, and the movable contact g Connected to 19 That is, the equalizer circuit
42 is connected in series to the signal transmission line of the master bus 34.
[0022]
When the equalizer circuit 42 is used in the second channel, the movable contacts g, h, i of the
switching circuit 45 are connected to the contacts a, c, e as shown in FIG. The first plug 49 a of
the cord 49 is inserted into the insertion jack 27, and the second plug 49 b of the cord 49 is
inserted into the input / output jack 43 of the third signal processing circuit 21. As a result, as
shown in FIG. 3, the tip 50 of the first plug 49 a contacts the first contact spring (tip) 38 of the
insertion jack 27, and the ring 51 contacts the second contact spring (ring) 39. The contact point
41 is separated from the first contact spring 38. Further, the tip 50 of the second plug 49 a
contacts the third contact spring (tip) 46 of the input / output jack 43, and the ring 51 contacts
the fourth contact spring (ring) 47. Thereby, the signal input terminal 23, the gain adjuster 25,
the first contact spring 38, the tip 50 of the first plug 49a, the signal line 53, the tip 50 of the
second plug 49b, the third contact spring 46, the contact point e, movable contact i, equalizer
circuit 42, first contact 38 of insertion jack 44, contact 41, contact c, movable contact h, fourth
contact 47 of input / output jack 43, second plug 49b ring 51, signal line 54, ring 51 of first plug
49a, first contact spring 39, fader 29, buffer circuit 31, pan 33, buffer circuits 17, 18, master
faders 19, 20 and output terminal 13 , And a circuit consisting of 14 is established. That is, the
equalizer circuit 42 is connected in series to the signal transmission line 23.
[0023]
The equalizer circuit 42 can also be connected to the insertion jack 26 of the first channel. At this
time, the first plug 47 may be inserted into the first insertion jack 26.
[0024]
An effector other than the equalizer circuit 42 for providing an effect such as distortion can be
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connected to the first or second channel. FIG. 4 shows in principle the method of connecting the
effector 60 to the insertion jack 26 of the first channel. An effect circuit 61 included in the
effector 60 is connected to the input / output jack 62. The input / output jack 62 has the same
structure as the input / output jack 43 of FIG. 1 and includes a third contact spring (tip) 46, a
fourth contact spring (ring) 47, and a sleeve 48. The contact spring (chip) 46 is connected to the
input terminal of the effect circuit 61, and the fourth contact spring (ring) 47 is connected to the
output terminal of the effect circuit 61. Insertion jack 26 of FIG. 4 and input / output jack 62 are
connected by cord 49 having stereo plugs 47 and 48 of FIG. As a result, a signal accompanied by
the effect of the effect circuit 61 can be obtained at the output terminal 13 and recorded on the
tape recorder 63.
[0025]
The effector 61 of FIG. 4 can be connected to the insertion jack 44 of the third signal processing
circuit 21 of FIG. In this case, the first plug 47 of FIG. 2 is inserted into the insertion jack 44 of
the third signal processing circuit 21, and the second plug 48 of FIG. 2 is inserted into the input /
output jack 62 of the effector 60 of FIG. Do. As a result, a series connection circuit of the
equalizer circuit 42 and the effect circuit 61 is formed. As shown in FIG. 1, when the third signal
processing circuit 21 is provided with both the input / output jack 43 and the insertion jack 44,
various signal processing can be easily achieved.
[0026]
[Another Embodiment] In the embodiment shown in FIG. 5, an insertion jack (first jack) 74 and a
signal processing circuit 75 are connected to the signal transmission line 73 between the input
terminal 71 and the output terminal 72. When the auxiliary signal processing unit 78 including
the effect circuit 77 is connected to the main signal processing unit 76 having the above
configuration, the auxiliary signal processing unit 78 is divided into a patch bay 79 and an
effector 80. Stereo input / output jack (second jack) 81, stereo insertion jack (third jack) 82,
monaural output jack (first connection terminal) 83, and monaural input jack (second connection
terminal) A plurality of jack groups consisting of 84) are provided, and the monaural input jack
85 and the monaural It is provided and 86. Insertion jack 74 of FIG. 5 has the same structure as
insertion jack 26 of FIG. The input / output jack 81 and the insertion jack 82 of the patch bay 79
have the same structure as the input / output jack 43 and the insertion jack 26 of FIG. Therefore,
each part of the insertion jack (first jack) 74 has the same reference numeral as that of the
insertion jack 26 of FIG. 1, and each part of the input / output jack (second jack) 81 is also
shown in FIG. The same symbols as those of the input / output jack 43 are given, and each part
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of the insertion jack (third jack) 82 is given a dash, and the same symbols as those of the
insertion jack 26 of FIG. I omit explanation. The contact springs 38 'and 39' of the insertion jack
82 of the patch bay 79 of FIG. 5 can be referred to as fifth and sixth contact springs. The fourth
contact spring (ring) 47 of the input / output jack 81 is connected to the contact 41 of the
insertion jack 82. The output jack 83 is connected to the third connection spring (chip) 46 of the
input / output jack 81, and the input jack 84 is connected to the fifth contact spring (chip) 38 'of
the insertion jack 82 via the short circuit protection resistor R. It is connected. The effect circuit
77 is connected to the input jack 85 and the output jack 86. When the effect circuit 77 is
connected to the signal transmission line 73, the insertion jack 74 and the input / output jack 81
are connected by the cord 49 having the stereo plugs 47 and 48 of FIG. 2, and between the
output jack 83 and the input jack 85. The output jack 86 and the input jack 84 are respectively
connected by cords having a monaural plug.
According to the scheme of FIG. 5, even with the effector 80 having the usual structure, the patch
bay 79 can be easily used as a relay device and connected to the main signal processing circuit
76 such as a mixer. Further, another signal processing circuit can be additionally connected to
the stereo jack (third jack) 82 of the patch bay 79.
[0027]
[Modifications] The present invention is not limited to the above-described embodiment, and the
following modifications are possible, for example. As shown in FIG. 6, in addition to the input /
output jack 62a, the input terminal 90 and the output terminal 91 can be connected to the effect
circuit 61 of the effector 60. The input / output terminal 62a has contacts 92, 93 in addition to
the third contact spring (tip) 46, the fourth contact spring (ring) 47, and the sleeve 48, similarly
to the input / output terminal 63 of FIG. The contacts 92, 93 contact the third and fourth contact
springs 46, 47 when the stereo plug is not inserted into the jack 62a, and are separated when the
plug is inserted. Note that the equivalent of the insertion jack 44 of FIG. 1 can be added to the
effector 60 of FIG.
[0028]
Not limited to the standard plug, it can be configured to use a mini plug.
[0029]
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According to the first and second aspects of the present invention, selective connection of the
signal processing circuit to the signal transmission line can be easily achieved.
According to the second aspect of the present invention, selective connection of the third signal
processing circuit can be easily achieved, and the utilization factor of the third signal processing
circuit can be increased.
[0030]
Brief description of the drawings
[0031]
1 is a circuit diagram showing a mixer according to an embodiment of the present invention.
[0032]
2 is a diagram showing in principle the cord with a plug used in the circuit of FIG.
[0033]
3 is a circuit diagram showing a state in which the second and third signal processing circuits are
connected by a cord in FIG.
[0034]
4 is a block diagram showing the relationship between the insertion jack and the effector.
[0035]
5 is a circuit diagram showing a signal processing apparatus of another embodiment of FIG.
[0036]
6 is a block diagram showing an effector of the modified example.
[0037]
7 is a diagram showing the connection of the conventional effector.
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[0038]
Explanation of sign
[0039]
21 Signal processing circuit 26 Insertion jack 42 Equalizer circuit 43 Input / output jack 44
Insertion jack 49 Code
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