JP2505153Y2 - Signal switching circuit - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal switching circuit used in an audio mixer.

[0002]

2. Description of the Related Art Effect mixers have been used for audio mixers.
A send circuit has been added, and a monaural effect
The one that outputs the send signal and the stereo effect
Some output a send signal.

FIG. 3 shows a circuit diagram of a conventional effect send circuit of a mixer. FIG. 3 (A) outputs a monaural effect send signal, and FIG. 3 (B) outputs a stereo effect send signal.

In FIG. 3A, the volume of the input signal is adjusted by the channel fader 11, and the buffer amplifier 1
After being amplified by 2, it is input to the pan pot (panoramic potentiometer) 13 and also to the two variable resistors 14 and 15 in the effect send section. The pan pot 13 sets the stereo localization of L and R, and its output is sent to each of the L channel bus and the R channel bus. The variable resistors 14 and 15 send an effect send signal of a predetermined level to each effector, and the respective outputs are sent to the effect send buses B ₁ and B ₂ , respectively.

A plurality of sets of these circuits are connected to the L channel bus, the R channel bus, and the effect sends B ₁ and B ₂ .

Then, the L channel signal is sent from the L channel bus to the L channel line via the summing amplifier 16, and the R channel signal is sent to the R channel line from the R channel bus via the summing amplifier 17. Also, from the effect send bus B ₁ to the effect send line E ₁ connected to a predetermined effector via the summing amplifier 18,
A send signal is sent, and an effect send signal is sent from the effect send bus B ₂ to the effect send line E ₂ connected to a predetermined effector via the summing amplifier 19.

Further, FIG. 3B shows a buffer amplifier 12
Signal is input to the pan pot 13 and is also input to the effect send pan pot 21 via the variable resistor 20 to set the stereo signal localization and effect effect.
Send to send buses B ₁ and B ₂ , respectively. Then, a stereo effect send signal is sent to the effect send L channel line and the effect send R channel line.

[0008]

However, in the circuit for transmitting a stereo effect send signal as shown in FIG. 3B, when the monaural effector is used, the effect send pan pot 22 is not necessary, and the mixer panel is not necessary. There is a problem that the parts (bread pot) arranged in the above are not used effectively.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a signal switching circuit which makes effective use of parts and is compatible with both stereo and monaural effectors.

[0010]

The above object is to provide an effect means for outputting a stereo signal to an input signal through a first setting means for performing stereo localization and adding a predetermined effect to the stereo signal. In a signal switching circuit for transmitting a stereo or monaural effect send signal, an effect send for interlocking a second setting means for performing stereo localization of the effect send signal and an adjusting means for adjusting the monaural signal amount. This is solved by providing a section and providing first and second changeover switches which are interlocked to switch the stereo output and the monaural output of the effect send signal.

[0011]

As described above, the effect send section for interlocking the second setting means and the adjusting means is provided. As a result, it is possible to effectively use the components arranged on the panel or the like. Further, by switching the stereo and monaural outputs of the effect send signal with the interlocking first and second changeover switches, it becomes possible to correspond to both the stereo and monaural effect means with a single circuit. It is a thing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a block diagram of an embodiment of the present invention.
FIG. 1 shows an effect send circuit 30 including a signal switching circuit used in a mixer.

In FIG. 1, the effect send circuit 31
Is connected from the input terminal 31 via the channel fader 32 and the buffer amplifier 33 to the input end of the pan pot 34 of the pan pot section which is the first setting means. The two output terminals of the pan pot 34 are connected to the L channel bus and the R channel.
Each is connected to a channel bus.

The output terminal of the buffer amplifier 33 is connected to the effect send bus B ₁ via the variable resistor 35 of the effect send section, and also the effect send pan pot 36a which is the second setting means. Connected to the input end. Two output ends of the effect send pan 36a are connected to the effect send bus B _3, B _4.

Further, the output terminal of the buffer amplifier 33 is a variable resistor 3 which is a means for adjusting the effect / send signal amount.
It is connected to the effect send bus B ₂ via 6b.

The pan pot 36a and the variable resistor 36
Reference numeral b is an interlocking variable resistor.

A plurality of sets of the above circuits are connected to the L channel bus, the R channel bus, and the effect send buses B _{1 to} B ₄ .

On the other hand, the L channel bus is connected to the L channel line via the summing amplifier 37, and the R channel bus is connected to the R channel line via the summing amplifier 38.

In addition, the effect send buses B ₁ and B ₃
Is connected to the switching terminals of the first switch 39a for switching between stereo and monaural outputs, and the common terminal is connected via the summing amplifier 40 to an effector which is a predetermined effect means such as an echo. Connected to E ₁ . The effect send buses B ₂ and B ₄ are respectively connected to the switching terminals of the second switching switch 39b for switching between stereo and monaural outputs, and the common terminal is the summing amplifier 4
It is connected via 1 to the effect send line E ₂ connected to the effector which is a predetermined effect means.

The first and second changeover switches 3
Reference numerals 9a and 39b denote two interlocking switches, which switch between the MONO mode and the STEREO mode, respectively.

Such an effect send circuit 30
The input signal coming from the input terminal 31 is adjusted in volume by the channel fader 32, amplified by the buffer bump 33 and then branched, and sent to the pan pot section and the effect send section.

In the pan pot section, the pan pot 35 sets the localization and forms a stereo signal, which is sent to the L channel bus and the R channel bus of the stereo bus.

On the other hand, the signal sent from the buffer amplifier 33 to the effect send section is input to the variable resistor 36b, which is one of the double variable resistors, and the single variable resistor 35. Signal to adjust the volume of the variable resistor 36b is sent to the effect bus B _2, signals to adjust the volume of the variable resistor 35 is branched into two, one is sent directly to the effect bus B ₁ . Another become stereo signal given the localization by pan 36a which is the other variable resistor twin variable resistor, is sent to the stereo effect bus B ₃ and B _4.

The stereo L channel bus and R channel bus signals are mixed by the summing amplifiers 37 and 38 to obtain stereo signals L and R. The first and second changeover switches 39a, 39 are connected to the inputs of the effect send signal summing amplifiers 40, 41.
Selects between the connected effect send buses B ₁ and B ₂ and B ₃ and B ₄ with b interposed.

The first and second changeover switches 39a,
When the effect send buses B ₁ and B ₂ are selected at 39b, the summing amplifier 40 mixes the effect send signal whose volume is adjusted by the variable resistor 35 to be an output signal, and the summing amplifier 41 is the variable resistor. 36b
The effect send signal whose volume is adjusted by is mixed and used as the output signal. Therefore, in this state, two systems of monaural effect send-out can be constructed.

In addition, the effect send buses B ₃ and B ₄
When is selected, the stereo signal whose volume is adjusted by the variable resistor 35 and whose localization is adjusted by the effect send pan pot 36a is output from the summing amplifiers 40 and 41, and one stereo effect・
It will be a send-out.

That is, the effect send pan pot 36a and the variable resistor 36b of the effect send section are connected to two.
As a series of variable resistors, it sends out both monaural and stereo signals, and switches the effect send signal between monaural and stereo with two series of first and second changeover switches 39a, 39b. It is possible to effectively utilize the above, and it is possible to support both stereo and monaural effectors.

Next, FIG. 2 shows a block diagram of another embodiment of the present invention. The effect send circuit 30 shown in FIG.
The effect send section of is using a signal from the output stage of the pan pot 34. That is, pan pot 3
4 is connected to the effect send bus B ₁ via the buffer amplifier 42 and the variable resistor 43a from _one output end of the buffer amplifier 4, and the variable resistor 4 is connected from the output end of the buffer amplifier 33.
It is connected to the effect send bus B ₃ via 3b (43a and two variable resistors).

The other output terminal of the pan pot 34 is connected to the effect send bus B ₂ via the buffer amplifier 41 and the variable resistor 45a, and the output terminal of the buffer amplifier 33 is connected to the variable resistors 45b (45a and 2a). It is connected to the effect send bus B ₄ via a series variable resistor).

The effect send circuit 30 shown in FIG.
Signals can be sent to the variable resistors 43a and 45a of the effect send with the localization set in the stereo output pan pot 34 unchanged. The switching by the first and second changeover switches 39a and 39b is shown in FIG. The same as 1.

[0031]

As described above, according to the present invention, the effect send section for interlocking the second setting means for sending the effect send signal and the adjusting means is provided.
By providing the interlocking first and second changeover switches for switching the stereo and monaural outputs of the send signal, it is possible to effectively utilize the arranged parts and to realize both stereo and monaural effect means with a single circuit. It is possible to correspond.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of another embodiment of the present invention.

FIG. 3 is a circuit diagram of an effect send circuit of a conventional mixer.

[Explanation of symbols]

30 effect send circuit 31 input terminal 32 channel fader 33, 42, 44 buffer amplifier 34 pan pot 35, 36b, 43a, 43b, 45a, 45b variable resistor 36a effect send pan pot 37, 38, 40, 41 summing amplifier 39a 1st changeover switch 39b 2nd changeover switch

Claims (1)

(57) [Scope of utility model registration request] 1. A stereo signal is output to a stereo signal via a first setting means for performing stereo localization with respect to an input signal, and a stereo or monaural effect is applied to an effect means for adding a predetermined effect to the stereo signal. In a signal switching circuit for sending a send signal, an effect send section for interlocking a second setting means for performing stereo localization of the effect send signal and an adjusting means for adjusting the monaural signal amount is provided, and the effect send signal is provided. A signal switching circuit configured to include first and second changeover switches that interlock to switch between stereo output and monaural output of a send signal.