Earphone monitor system

Abstract

To provide an earphone monitor system capable of hearing performance sound required by a musical performer.SOLUTION: An earphone monitor system includes: a first transmitter for FM-modulating a mixing signal and transmitting the signal with a first frequency f1; a second transmitter for inputting each one of a plurality of performance signals as a channel signal, FM-modulating the respective channel signals, and transmitting the signals with a second frequency f2; first FM reception demodulation sections 61-1 for receiving the signal with the first frequency f1 from the first transmitter and FM-demodulating the signal; second FM reception demodulation sections 62-1 for receiving a signal with the second frequency f2 from the second transmitter and FM-demodulating the signal; and first receivers 60-1 for outputting a monophonic signal from the first FM reception demodulation section 61-1 to an earphone 70-1 as one of an L signal and an R signal and also outputting a monophonic signal from the second FM reception demodulation section 62-1 to the earphone as the other one of the L signal and the R signal.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present disclosure relates to an earphone monitoring system.

Background Art

[0002] Conventionally, as a mixer that mixes audio signals and distributes the mixing result, there is one disclosed in Patent Document 1 below. The mixer disclosed in Patent Document 1 includes: first mixing means for mixing each audio signal input via a plurality of input channels and outputting the mixed audio signal via a plurality of output channels; and means for extracting each audio signal input via the plurality of input channels and before being input to the first mixing means as a solo performance audio signal and adding it to each of the audio signals output via the plurality of output channels, the means having a second mixing means having a volume for independently adjusting the volume of each of the solo performance audio signals.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present disclosure is to provide an earphone monitoring system that can use FM transmission and reception technology to allow a performer to listen to the performance sound required by the performer.

Means for Solving the Problems

[0005] The earphone monitoring system of the present disclosure is A first transmitter that inputs a mixing signal obtained by mixing and adjusting a plurality of performance signals, FM-modulates the mixing signal, and transmits it at a first frequency. A second transmitter that inputs each of the plurality of performance signals as a channel signal, FM-modulates each channel signal, and transmits it at a second frequency. A first FM reception demodulation unit that receives and FM-demodulates the signal of the first frequency from the first transmitter, a second FM reception demodulation unit that receives and FM-demodulates the signal of the second frequency from the second transmitter, and outputs the monaural signal from the first FM reception demodulation unit as one of the L signal and the R signal to the earphone, and outputs the monaural signal from the second FM reception demodulation unit as the other of the L signal and the R signal to the earphone. It is provided with a first receiver. In addition, the earphone monitor system of the present disclosure A first transmitter that inputs a mixing signal obtained by mixing and adjusting a plurality of performance signals, FM-modulates the mixing signal, and transmits it at a first frequency. A second transmitter that inputs each of the plurality of performance signals as a channel signal, FM-modulates each channel signal, and transmits it at a second frequency. A third FM reception demodulation unit that receives and FM-demodulates the signal of the first frequency from the first transmitter, a fourth FM reception demodulation unit that receives and FM-demodulates the signal of the second frequency from the second transmitter, and a stereo synthesis amplification unit that stereo synthesizes the stereo signal from the third FM reception demodulation unit and the monaural signal from the fourth FM reception demodulation unit, and outputs the stereo signal from the stereo synthesis amplification unit to the earphone. It is provided with a second receiver.

Effect of the Invention

[0006] According to the present disclosure, it is possible to provide an earphone monitor system capable of listening to the performance sound required by the performer.

Brief Description of the Drawings

[0007]

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Embodiments for Carrying Out the Invention

[0008] 《Reference Technology》 Before explaining the earphone monitor system according to the embodiments of the present disclosure, an earphone monitor system as reference technology devised by the applicant will be explained based on FIGS. 1 to 5.

[0009] FIG. 1 is a block diagram showing a mixer console of an earphone monitor system according to the reference technology, FIG. 2 is a block diagram showing a transmitter etc. of the earphone monitor system according to the reference technology, FIG. 3 is a block diagram showing a receiver etc. of the earphone monitor system according to the reference technology, FIG. 4 is a block diagram showing a composite signal generation unit according to the reference technology, and FIG. 5 is a block diagram showing demodulation of a composite signal according to the reference technology.

[0010] The earphone monitor system according to the reference technology of FIGS. 1 to 5 includes a mixer console 10 provided with a mixer unit 20, a transmitter 300 for earphone monitors provided with a composite signal generation unit 310 and an FM modulation transmitter unit 320, FM reception demodulation units 610-1, 610-2, ~610-N and stereo amplification units 620-1, 620-2, ~620-N respectively provided in earphone monitors receivers 600-1, 600-2, ~600-N (N is an integer), and earphones (L / R) 700-1, 700-2, ~700-N connected to the earphone monitors receivers 600-1, 610-2, ~600-N.

[0011] As shown in FIG. 1, the mixing console 10 is provided with N (N is an integer) input terminals input1 to input terminal inputN and N output terminals AUX-out1 to output terminal AUX-outN. Performance signals of performers 1 to N are input to the N input terminals input1 to input terminal inputN. The performance signals of performers 1 to N input to the mixing console 10 are respectively captured as signals of channel 1 (ch1) to signals of channel N (chN). Note that the signals of channel 1 (ch1) to signals of channel N (chN) are connected to the N output terminals AUX-out1 to output terminal AUX-outN of the mixing console 10. The mixer section 20 of the mixing console 10 captures the signals of channel 1 (ch1) to signals of channel N (chN) which are the performance signals of performers 1 to N. The mixer section 20 captures the signals of channel 1 (ch1) to signals of channel N (chN), and mixing is performed by the sound engineer (PA: Public Address), and volume, L / R position setting, L / R volume adjustment after mixing, etc. of each channel (ch1 to chN) signal are performed. The signals after mixing by the mixer section 20 are output from output terminals AUX-L and output terminal AUX-R as monitor outputs, and are also output from output terminals OUT-L and output terminal OUT-R as venue outputs.

[0012] As shown in FIG. 2, the transmitter 300 for earphone monitors includes a composite signal generation section 310 and an FM modulation transmission section 320. The L signal and R signal which are the performance signals mixed and adjusted by the mixer section 20 are input to the L terminal and R terminal of the composite signal generation section 310 of the transmitter 300 via the output terminals AUX-L and output terminal AUX-R. The composite signal generation section 310 generates a composite signal vcomp based on the L signal and R signal input from the mixer section 20.

[0013] FIG. 4 is a block diagram showing a pilot tone type composite signal generation unit according to the prior art. As shown in FIG. 4, the composite signal generation unit 310 includes an adder 311, a subtractor 312, a multiplier 313, an adder 314, an oscillator 315, and a 1 / 2 frequency divider 316. In FIG. 4, assuming that the L signal and the R signal input from the mixer unit 20 are vL and vR, the adder 311 outputs vL + vR, and the subtractor 312 outputs vL - vR. The multiplier 313 multiplies vL - vR output from the subtractor 312 by sin(ωst) output from the oscillator 315 and outputs (vL - vR)·sin(ωst). Note that the carrier frequency fs = ωs / 2π. The adder 314 adds the output of the adder 311, the output of the multiplier 313, and Ap·sin(ωs / 2)t which is the output of the 1 / 2 frequency divider 316, and outputs the composite signal vcomp. Note that Ap·sin(ωs / 2)t is a pilot signal, and Ap is the amplitude of the pilot signal. That is, vcomp = vL + vR + (vL - vR)·sin(ωst) + Ap·sin(ωs / 2)t. Note that since the configuration and operation of the composite signal generation unit are known techniques, detailed description thereof is omitted.

[0014] The composite signal vcomp generated by the composite signal generation unit 310 is FM - modulated by the FM modulation transmission unit 320 and transmitted as a radio wave of frequency f1 via the antenna. Note that since the configuration and operation of the FM modulation transmission unit are known techniques, detailed description thereof is omitted.

[0015] As shown in FIG. 3, the receivers 600 - 1, 600 - 2, ~ 600 - N for earphone monitors each include an FM reception demodulation unit 610 - 1, 600 - 2, ~ 610 - N and a stereo amplification unit 620 - 1, 620 - 2, ~ 620 - N. The radio wave of frequency f1 transmitted from the transmitter 300 for the earphone monitor is received by the antennas 630-1 to 630-N of the receivers 600-1 to 600-N for the earphone monitor, FM demodulated by the FM reception demodulation units 610-1 to 610-N, and the composite signal vcomp is extracted, and this composite signal vcomp is demodulated into a stereo signal.

[0016] Figure 5 is a block diagram showing the demodulation of a composite signal of a matrix system according to the prior art. The block diagram of Figure 5 includes a low-pass filter 501, an adder 502, an oscillator 503, a band-pass filter 504, a detection circuit 505, an adder 506, and a subtractor 507. In Figure 5, the composite signal vcomp can obtain vL + vR by removing components of a predetermined frequency or higher by the low-pass filter 501. Also, by adding the carrier signal 3sinωst to the composite signal vcomp by the oscillator 503 and the adder 502 and applying it to the band-pass filter 504 that passes a predetermined frequency band, an AM modulated wave can be obtained. Then, by extracting the envelope of the waveform of this AM modulated wave by the detection circuit 505, vL - vR can be obtained. And by calculating the sum and difference of vL + vR and vL - vR by the adder 506 and the subtractor 507, 2vL and 2vR can be obtained. Note that since the operation of demodulating the composite signal is a known technique, a detailed description is omitted.

[0017] The stereo signals demodulated by the FM reception demodulation units 610-1 to 610-N are amplified by the stereo amplification units 620-1 to 620-N and output to the earphones (L / R) 700-1 to the earphones (L / R) 700-N of the performers 1 to N.

[0018] As shown in FIGS. 1 and 2, the L signal and the R signal of the performance signal mixed and adjusted by the mixer unit 20 are sent to the stereo power amplifier unit 50 via the output terminal OUT-L and the output terminal OUT-R, amplified by the stereo power amplifier unit 50, and output by the venue speakers (L / R) 51.

[0019] The earphone monitor system of the prior art shown in FIGS. 1 to 5 is such that an audio engineer transmits, as a monitor output, the signal adjusted by the mixer unit 20 from a transmitter 300 for earphone monitors via the output terminal AUX-L and the output terminal AUX-R, and the receivers 600-1 to 600-N for earphone monitors receive the signal, and each performer 1 to N listens through the earphones 700-1 to 700-N. That is, according to the earphone monitor system of the prior art, all of the performers 1 to N listen to the same performance sound that has been mixed and adjusted. However, the performers have a demand to hear their own performance sound louder than other performance sounds, and the earphone monitor system of the prior art could not meet this demand.

[0020] The embodiment of the present disclosure is for solving the problems of the prior art, and an object thereof is to provide an earphone monitor system that allows a performer to hear the performance sound that the performer requests, including the performance sound that the performer himself / herself performs.

[0021] Embodiment 1. Next, the earphone monitor system according to Embodiment 1 will be described with reference to FIGS. 6 to 13. FIG. 6 is a block diagram showing a mixing console of the earphone monitoring system according to Embodiment 1, FIG. 7 is a block diagram showing a second transmitter of the earphone monitoring system according to Embodiment 1, FIG. 8 is a block diagram showing a first transmitter of the earphone monitoring system according to Embodiment 1, FIG. 9 is a block diagram showing a first receiver and the like of the earphone monitoring system according to Embodiment 1, FIG. 10 is a block diagram showing a first composite signal generation unit according to Embodiment 1, FIG. 11 is a block diagram showing a second composite signal generation unit according to Embodiment 1, FIG. 12 is a block diagram for explaining demodulation of the first composite signal according to Embodiment 1, and FIG. 13 is a block diagram for explaining demodulation of the second composite signal according to Embodiment 1.

[0022] The earphone monitoring system of Embodiment 1 shown in FIGS. 6 to 13 includes a mixing console 10 including a mixer unit 20, one first transmitter 40 including a first composite signal generation unit 41 and a first FM modulation transmitter unit 42, five second transmitters 30-1, 30-2, ~30-5 each including a second composite signal generation unit 31-1, 31-2, ~31-5 and a second FM modulation transmitter unit 32-1, 32-2, ~32-5, ten first receivers 60-1~60-10 each including a first FM reception demodulation unit 61-1~61-10, a second FM reception demodulation unit 62-1~62-10, a first monaural amplification unit 63-1~63-10, a second monaural amplification unit 64-1~64-10, and an L / R selection unit 65-1~65-10, eleven to N fifth receivers 80 each including an FM reception demodulation unit 81 and a stereo amplification unit 82, earphones (L / R) 70-1~70-10 connected to the first receivers 60-1~60-10, and earphones (L / R) 90 connected to the fifth receiver 80.

[0023] As shown in FIG. 6, the mixing console 10 is provided with N (N is an integer) input terminals input1 to input terminal inputN and N output terminals AUX-out1 to output terminal AUX-outN. Performance signals from performer 1 to performer N are input to the N input terminals input1 to input terminal inputN. The performance signals from performer 1 to performer N input to the mixing console 10 are respectively captured as the signals of channel 1 (ch1) to the signals of channel N (chN). Also, the signals of channel 1 (ch1) to the signals of channel N (chN) are connected to the N output terminals AUX-out1 to output terminal AUX-outN of the mixing console 10. The mixer section 20 of the mixing console 10 captures the signals of channel 1 (ch1) to the signals of channel N (chN), which are the performance signals from performer 1 to performer N. The mixer section 20 captures the signals of channel 1 (ch1) to the signals of channel N (chN), and mixing is performed by the sound engineer (PA: Public Address). Volume, L / R position setting, post-mixing L / R volume adjustment, etc. of each channel (ch1 to chN) signal are carried out. The signals after mixing by the mixer section 20 are output from the output terminals AUX-L and output terminal AUX-R as monitor outputs, and are also output from the output terminals OUT-L and output terminal OUT-R as venue outputs.

[0024] As shown in FIG. 8, the first transmitter 40 includes a first composite signal generation section 41 and a first FM modulation transmission section 42. The L signal and the R signal, which are the performance signals mixed and adjusted by the mixer section 20, are input to the L terminal and the R terminal of the first composite signal generation section 41 of the first transmitter 40 via the output terminals AUX-L and output terminal AUX-R. The first composite signal generation section 41 generates a first composite signal vcomp1 based on the L signal and the R signal input from the mixer section 20. The first composite signal vcomp1 generated by the first composite signal generation section 41 is FM modulated by the first FM modulation transmission section 42 and transmitted as a radio wave of the first frequency f1 via the antenna.

[0025] The configuration and operation of the first composite signal generation unit 41 are the same as those of the composite signal generation unit 310 described in the prior art. That is, as shown in FIG. 10, the first composite signal generation unit 41 includes an adder 411, a subtractor 412, a multiplier 413, an adder 414, an oscillator 415, and a 1 / 2 frequency divider 416. In FIG. 10, assuming that the L signal and the R signal input from the mixer unit 20 are vL and vR, the adder 411 outputs vL + vR, and the subtractor 412 outputs vL - vR. The multiplier 413 multiplies vL - vR output from the subtractor 412 by sin(ωst) output from the oscillator 415 and outputs (vL - vR)·sin(ωst). Note that the carrier frequency fs = ωs / 2π. The adder 414 adds the output of the adder 411, the output of the multiplier 413, and Ap·sin(ωs / 2)t which is the output of the 1 / 2 frequency divider 416 to output the first composite signal vcomp1. Note that Ap·sin(ωs / 2)t is a pilot signal, and Ap is the amplitude of the pilot signal. That is, vcomp1 = vL + vR + (vL - vR)·sin(ωst) + Ap·sin(ωs / 2)t.

[0026] In FIG. 7, the second transmitters 30-1, 30-2, ~30-5 each include a second composite signal generation unit 31-1, 31-2, ~31-5 and a second FM modulation transmitter unit 32-1, 32-2, ~32-5. Note that the second transmitters 30-1, 30-2, ~30-5 may be collectively referred to as the second transmitter 30. The performance signals of performers 1 to 10 input to the mixer console 10 are respectively captured as signals of channel 1 (ch1) to channel 10 (ch10), and the signals of channel 1 (ch1) to channel 10 (ch10) are output from ten output terminals AUX-out1 to output terminal AUX-out10. The second composite signal generation unit 31-1 of the second transmitter 30-1 takes in the signals of channel 1 (ch1) and channel 2 (ch2) from the L input terminal and the R input terminal, and the second composite signal generation unit 31-1 generates the second composite signal vcomp2. The second composite signal generation unit 31-2 of the second transmitter 30-2 takes in the signals of channel 3 (ch3) and channel 4 (ch4) from the L input terminal and the R input terminal, and the second composite signal generation unit 31-2 generates the second composite signal vcomp2. Although not shown in the figure, the second composite signal generation unit 31-3 of the second transmitter 30-3 takes in the signals of channel 5 (ch5) and channel 6 (ch6) from the L input terminal and the R input terminal, and the second composite signal generation unit 31-3 generates the second composite signal vcomp2. Although not shown in the figure, the second composite signal generation unit 31-4 of the second transmitter 30-4 takes in the signals of channel 6 (ch6) and channel 7 (ch7) from the L input terminal and the R input terminal, and the second composite signal generation unit 31-4 generates the second composite signal vcomp2. Then, the second composite signal generation unit 31-5 of the second transmitter 30-5 takes in the signals of channel 9 (ch9) and channel 10 (ch10) from the L input terminal and the R input terminal, and the second composite signal generation unit 31-5 generates the second composite signal vcomp2.

[0027] FIG. 11 is a block diagram showing a second composite signal generation unit of a pilot tone system according to Embodiment 1. In FIG. 11, the second composite signal generation unit 31-1 is shown as a representative, and its configuration and operation will be described. The second composite signal generation units 31-2 to 31-5 have the same configuration as the second composite signal generation unit 31-1. As shown in FIG. 11, the second composite signal generation unit 31-1 includes an adder 111, a subtractor 112, a multiplier 113, an adder 114, an oscillator 115, and a divide-by-2 circuit 116. In FIG. 11, the second composite signal generation unit 31-1 takes in the signals of channel 1 (ch1) and channel 2 (ch2) from the mixer unit 20 through the L input terminal and the R input terminal. If the input signals of channel 1 (ch1) and channel 2 (ch2) are vch1 and vch2 respectively, the adder 111 outputs vch1 + vch2, and the subtractor 112 outputs vch1 - vch2. The multiplier 113 multiplies vch1 - vch2 output from the subtractor 112 by sin(ωst) output from the oscillator 115, and outputs (vch1 - vch2)·sin(ωst). Note that the carrier frequency fs = ωs / 2π. The adder 114 adds the output of the adder 111, the output of the multiplier 113, and Ap·sin(ωs / 2)t which is the output of the 1 / 2 frequency divider 116, and outputs the second composite signal vcomp2. Note that Ap·sin(ωs / 2)t is the pilot signal, and Ap is the amplitude of the pilot signal. That is, vcomp2 = vch1 + vch2 + (vch1 - vch2)·sin(ωst) + Ap·sin(ωs / 2)t.

[0028] In the same way as above, the second composite signal generation unit 31-2 takes in the signals of channel 3 (ch3) and channel 4 (ch4) from the mixer unit 20 through the L input terminal and the R input terminal. If the input signals of channel 3 (ch3) and channel 4 (ch4) are vch3 and vch4 respectively, the second composite signal vcomp2 output from the second composite signal generation unit 31-2 is as follows. vcomp2 = vch3 + vch4 + (vch3 - vch4)·sin(ωst) + Ap·sin(ωs / 2)t

[0029] Further, the second composite signal generation unit 31-3 takes in the signals of channel 5 (ch5) and channel 6 (ch6) from the mixer unit 20 through the L input terminal and the R input terminal. When the signals of channel 5 (ch5) and channel 6 (ch6) input are vch5 and vch6, the second composite signal vcomp2 output from the second composite signal generation unit 31-3 is as follows. vcomp2 = vch5 + vch6 + (vch5 - vch6)·sin(ωst) + Ap·sin(ωs / 2)t

[0030] Also, the second composite signal generation unit 31-4 takes in the signals of channel 7 (ch7) and channel 8 (ch8) from the mixer unit 20 through the L input terminal and the R input terminal. When the signals of channel 7 (ch7) and channel 8 (ch8) input are vch7 and vch8, the second composite signal vcomp2 output from the second composite signal generation unit 31-4 is as follows. vcomp2 = vch7 + vch8 + (vch7 - vch8)·sin(ωst) + Ap·sin(ωs / 2)t

[0031] Furthermore, the second composite signal generation unit 31-5 takes in the signals of channel 9 (ch9) and channel 10 (ch10) from the mixer unit 20 through the L input terminal and the R input terminal. When the signals of channel 9 (ch9) and channel 10 (ch10) input are vch9 and vch10, the second composite signal vcomp2 output from the second composite signal generation unit 31-5 is as follows. vcomp2 = vch9 + vch10 + (vch9 - vch10)·sin(ωst) + Ap·sin(ωs / 2)t

[0032] Each second composite signal vcomp2 generated by the second composite signal generation units 31-1, 31-2, 31-3, 31-4, and 31-5 is frequency-modulated by the second FM modulation transmission units 32-1, 32-2, 32-3, 32-4, and 32-5 respectively and transmitted as radio waves of the second frequency f2-1, the second frequency f2-2, the second frequency f2-3, the second frequency f2-4, and the second frequency f2-5 respectively via an antenna. Note that the radio waves of the second frequency f2-1, the second frequency f2-2, the second frequency f2-3, the second frequency f2-4, and the second frequency f2-5 are collectively referred to as the second frequency f2. Also, since the configurations and operations of the second FM modulation transmission units 32-1, 32-2, 32-3, 32-4, and 32-5 are known techniques, detailed descriptions thereof are omitted.

[0033] Here, in the first embodiment, the frequency bands of the first frequency f1 transmitted from the first transmitter 40 and the second frequency f2 transmitted from the second transmitters 30-1, 30-2, 30-3, 30-4, and 30-5 will be described. In the first embodiment, for example, the B-type band in the 800 MHz band that does not require a license in Japan is used, and six waves from B11 to B61 can be used in one group. An example in which FM transmission and reception of six waves can be performed in the same space will be described. That is, in the first embodiment, FM transmission and reception are performed using six waves of the first frequency f1 and the second frequencies f2 to f5, which are the B-type bands. Note that also in the second embodiment described later, the same frequency band as in the first embodiment is used. Also, the above is merely an example, and the frequency band to be used is not limited to this.

[0034] As shown in FIG. 9, the ten first receivers 60-1 to 60-10 for earphone monitors are for performers 1 to 10, for example, and include first FM reception demodulation units 61-1 to 61-10, second FM reception demodulation units 62-1 to 62-10, first monaural amplification units 63-1 to 63-10, second monaural amplification units 64-1 to 64-10, and L / R selection units 65-1 to 65-10 respectively. Further, the fifth receiver 80 is, for example, for performers 11 to N, and includes an FM reception demodulation unit 81 and a stereo amplification unit 82.

[0035] The radio waves of the first frequency f1 transmitted from the first transmitter 40 shown in FIG. 8 and the radio waves of the second frequencies f2-1 to f2-5 transmitted from the second transmitters 30-1 to 30-5 shown in FIG. 7 are taken into the first receivers 60-1 to 60-10 via the antennas 66-1 to 66-10 of the first receivers 60-1 to 60-10.

[0036] In FIG. 9, the first FM reception demodulation units 61-1 to 61-10 of the first receivers 60-1 to 60-10 FM demodulate the radio wave signal of the first frequency f1 transmitted from the first transmitter 40 to extract the first composite signal vcomp1, and demodulate this first composite signal vcomp1 into a monaural signal.

[0037] FIG. 12 is a block diagram for explaining the demodulation of the first composite signal according to Embodiment 1. In the block diagram of FIG. 12, a low-pass filter 51a, an adder 52a, an oscillator 53a, a band-pass filter 54a, a detection circuit 55a, an adder 56a, a subtractor 57a, and an adder 58a are provided. In FIG. 12, the first composite signal vcomp1 can obtain vL + vR by removing components of a predetermined frequency or higher with the low-pass filter 51a. Further, a carrier signal 3sinωst is added to the first composite signal vcomp1 by the oscillator 53a and the adder 52a, and then passed through a band-pass filter 54a that passes a predetermined frequency band to obtain an AM modulated wave. Then, the envelope of the waveform of this AM modulated wave is extracted by the detection circuit 55a to obtain vL - vR. Then, by calculating the sum and difference of vL + vR and vL - vR with the adder 56a and the subtractor 57a, 2vL and 2vR can be obtained, and further, by adding with the adder 58a, a monaural signal 2vL + 2vR can be obtained.

[0038] In Fig. 9, the second FM reception demodulation units 62-1 to 62-10 of the first receivers 60-1 to 60-10 FM demodulate one of the radio signals of the second frequencies f2-1 to f2-5 transmitted from the second transmitters 30-1 to 30-5, extract the second composite signal vcomp2, and demodulate the second composite signal vcomp2 into a stereo signal. Note that the second FM reception demodulation units 62-1 to 62-10 of the first receivers 60-1 to 60-10 are each capable of selecting to receive one of the radio signals of the second frequencies f2-1 to f2-5 transmitted from the second transmitters 30-1 to 30-5.

[0039] In the following description, the second FM reception demodulation unit 62-1 of the first receiver 60-1 selects to receive the radio signal of the second frequency f2-1 transmitted from the second transmitter 30-1. Also, the second FM reception demodulation unit 62-2 of the first receiver 60-2 selects to receive the radio signal of the second frequency f2-1 transmitted from the second transmitter 30-1. Also, the second FM reception demodulation unit 62-3 of the first receiver 60-3 selects to receive the radio signal of the second frequency f2-2 transmitted from the second transmitter 30-2. Also, the second FM reception demodulation unit 62-4 of the first receiver 60-4 selects to receive the radio signal of the second frequency f2-2 transmitted from the second transmitter 30-2. Also, the second FM reception demodulation unit 62-5 of the first receiver 60-5 selects to receive the radio signal of the second frequency f2-3 transmitted from the second transmitter 30-3. Also, the second FM reception demodulation unit 62-6 of the first receiver 60-6 selects to receive the radio signal of the second frequency f2-3 transmitted from the second transmitter 30-3. Also, the second FM reception demodulation unit 62-7 of the first receiver 60-7 selects to receive the radio signal of the second frequency f2-4 transmitted from the second transmitter 30-4. Also, the second FM reception demodulation unit 62-8 of the first receiver 60-8 has selected to receive the radio wave signal of the second frequency f2-4 transmitted from the second transmitter 30-4. Also, the second FM reception demodulation unit 62-9 of the first receiver 60-9 has selected to receive the radio wave signal of the second frequency f2-5 transmitted from the second transmitter 30-5. Also, the second FM reception demodulation unit 62-10 of the first receiver 60-10 has selected to receive the radio wave signal of the second frequency f2-5 transmitted from the second transmitter 30-5.

[0040] FIG. 13 is a block diagram for explaining the demodulation of the second composite signal according to the first embodiment. FIG. 13 is an explanatory diagram for demodulating the second composite signal in the second FM reception demodulation unit 62-1 of the first receiver 60-1. Note that the second FM reception demodulation units 62-2 to 62-10 of the first receivers 60-2 to 60-10 also have the same configuration and perform the same operations. The block diagram of FIG. 13 includes a low-pass filter 51b, an adder 52b, an oscillator 53b, a band-pass filter 54b, a detection circuit 55b, an adder 56b, a subtractor 57b, and an adder 58b. In FIG. 13, the second FM reception demodulation unit 62-1 of the first receiver 60-1 has selected to receive the radio wave signal of the second frequency f2-1 transmitted from the second transmitter 30-1. Therefore, the second composite signal vcomp2 can obtain vch1 + vch2 by removing components of a predetermined frequency or higher by the low-pass filter 51b. Also, a carrier signal 3sinωst is added to the second composite signal vcomp2 by the oscillator 53b and the adder 52b, and then passed through a band-pass filter 54b that passes a predetermined frequency band to obtain an AM modulated wave. Then, by extracting the envelope of the waveform of this AM modulated wave by the detection circuit 55b, vch1 - vch2 can be obtained. Then, by calculating the sum and difference of vch1 + vch2 and vch1 - vch2 with the adder 56b and subtractor 57b, 2vch1 can be output from the L terminal and 2vch2 can be output from the R terminal.

[0041] Similarly, the second FM reception demodulation unit 62-2 of the first receiver 60-2 has selected to take in the radio wave signal of the second frequency f2-1 transmitted from the second transmitter 30-1. As a result, the second FM reception demodulation unit 62-2 of the first receiver 60-2 can output 2vch1 from the L terminal and 2vch2 from the R terminal. The second FM reception demodulation unit 62-3 of the first receiver 60-3 has selected to take in the radio wave signal of the second frequency f2-2 transmitted from the second transmitter 30-2. As a result, the second FM reception demodulation unit 62-3 of the first receiver 60-3 can output 2vch3 from the L terminal and 2vch4 from the R terminal. The second FM reception demodulation unit 62-4 of the first receiver 60-4 has selected to take in the radio wave signal of the second frequency f2-2 transmitted from the second transmitter 30-2. As a result, the second FM reception demodulation unit 62-4 of the first receiver 60-4 can output 2vch3 from the L terminal and 2vch4 from the R terminal. The second FM reception demodulation unit 62-5 of the first receiver 60-5 has selected to take in the radio wave signal of the second frequency f2-3 transmitted from the second transmitter 30-3. As a result, the second FM reception demodulation unit 62-5 of the first receiver 60-5 can output 2vch5 from the L terminal and 2vch6 from the R terminal. The second FM reception demodulation unit 62-6 of the first receiver 60-6 has selected to take in the radio wave signal of the second frequency f2-3 transmitted from the second transmitter 30-3. As a result, the second FM reception demodulation unit 62-6 of the first receiver 60-6 can output 2vch5 from the L terminal and 2vch6 from the R terminal. The second FM reception demodulation unit 62-7 of the first receiver 60-7 has selected to receive the radio wave signal of the second frequency f2-4 transmitted from the second transmitter 30-4. As a result, the second FM reception demodulation unit 62-7 of the first receiver 60-7 can output 2vch7 from the L terminal and 2vch8 from the R terminal. The second FM reception demodulation unit 62-8 of the first receiver 60-8 has selected to receive the radio wave signal of the second frequency f2-4 transmitted from the second transmitter 30-4. As a result, the second FM reception demodulation unit 62-8 of the first receiver 60-8 can output 2vch7 from the L terminal and 2vch8 from the R terminal. The second FM reception demodulation unit 62-9 of the first receiver 60-9 has selected to receive the radio wave signal of the second frequency f2-5 transmitted from the second transmitter 30-5. As a result, the second FM reception demodulation unit 62-9 of the first receiver 60-9 can output 2vch9 from the L terminal and 2vch10 from the R terminal. The second FM reception demodulation unit 62-10 of the first receiver 60-10 has selected to receive the radio wave signal of the second frequency f2-5 transmitted from the second transmitter 30-5. As a result, the second FM reception demodulation unit 62-10 of the first receiver 60-10 can output 2vch9 from the L terminal and 2vch10 from the R terminal.

[0042] Next, in FIG. 9, the performance sounds heard by performers 1 to 10 will be described using the first receivers 60-1 to 60-10 and the earphones (L / R) 70-1 to 70-10, respectively.

[0043] The first FM reception demodulation unit 61-1 of the first receiver 60-1 demodulates the monaural signal of the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the first monaural amplification unit 63-1, and assigns it to either the L terminal or the R terminal of the earphone 70-1. As a result, the performer 1 who has the earphone 70-1 can listen to the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM reception demodulation unit 62-1 of the first receiver 60-1 outputs the L signal 2vch1 and the R signal 2vch2 obtained by demodulating the radio wave signal of the second frequency f2-1 transmitted from the second transmitter 30-1 to the L / R selection unit 65-1. Here, the L / R selection unit 65-1 selects the L signal 2vch1, outputs it to the second monaural amplification unit 64-1, and assigns it to either the L terminal or the R terminal of the earphone 70-1. As a result, the performer 1 who has the earphone 70-1 can listen to his own performance sound with the other ear.

[0044] The first FM reception demodulation unit 61-2 of the first receiver 60-2 demodulates the monaural signal of the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the first monaural amplification unit 63-2, and assigns it to either the L terminal or the R terminal of the earphone 70-2. As a result, the performer 2 who has the earphone 70-2 can listen to the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM reception demodulation unit 62-2 of the first receiver 60-2 outputs the L signal 2vch1 and the R signal 2vch2 obtained by demodulating the radio wave signal of the second frequency f2-1 transmitted from the second transmitter 30-1 to the L / R selection unit 65-2. Here, the L / R selection unit 65-2 selects the R signal 2vch2, outputs it to the second monaural amplification unit 64-2, and assigns it to either the L terminal or the R terminal of the earphone 70-2. As a result, the performer 2 who has the earphone 70-2 can listen to his own performance sound with the other ear.

[0045] The first FM reception demodulation unit 61-3 of the first receiver 60-3 demodulates the monaural signal of the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the first monaural amplification unit 63-3, and assigns it to either the L terminal or the R terminal of the earphone 70-3. As a result, the performer 3 having the earphone 70-3 can listen to the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM reception demodulation unit 62-3 of the first receiver 60-3 outputs the L signal 2vch3 and the R signal 2vch4 obtained by demodulating the radio wave signal of the second frequency f2-2 transmitted from the second transmitter 30-2 to the L / R selection unit 65-3. Here, the L / R selection unit 65-3 selects the L signal 2vch3, outputs it to the second monaural amplification unit 64-3, and assigns it to either the L terminal or the R terminal of the earphone 70-3. As a result, the performer 3 having the earphone 70-3 can listen to the performance sound of the performer 3 himself / herself with the other ear.

[0046] The first FM reception demodulation unit 61-4 of the first receiver 60-4 demodulates the monaural signal of the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the first monaural amplification unit 63-4, and assigns it to either the L terminal or the R terminal of the earphone 70-4. As a result, the performer 4 having the earphone 70-4 can listen to the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM reception demodulation unit 62-4 of the first receiver 60-4 outputs the L signal 2vch3 and the R signal 2vch4 obtained by demodulating the radio wave signal of the second frequency f2-2 transmitted from the second transmitter 30-2 to the L / R selection unit 65-4. Here, the L / R selection unit 65-4 selects the R signal 2vch4, outputs it to the second monaural amplification unit 64-4, and assigns it to either the L terminal or the R terminal of the earphone 70-4. As a result, the performer 4 having the earphone 70-4 can listen to the performance sound of the performer 4 himself / herself with the other ear.

[0047] The first FM demodulation unit 61-5 of the first receiver 60-5 demodulates the monaural signal of the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the first monaural amplification unit 63-5, and assigns it to either the L terminal or the R terminal of the earphone 70-5. As a result, the performer 5 who holds the earphone 70-5 can listen to the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM demodulation unit 62-5 of the first receiver 60-5 outputs the L signal 2vch5 and the R signal 2vch6 obtained by demodulating the radio wave signal of the second frequency f2-3 transmitted from the second transmitter 30-3 to the L / R selection unit 65-5. Here, the L / R selection unit 65-5 selects the L signal 2vch5, outputs it to the second monaural amplification unit 64-5, and assigns it to either the L terminal or the R terminal of the earphone 70-5. As a result, the performer 5 who holds the earphone 70-5 can listen to his own performance sound with the other ear.

[0048] The first FM demodulation unit 61-6 of the first receiver 60-6 demodulates the monaural signal of the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the first monaural amplification unit 63-6, and assigns it to either the L terminal or the R terminal of the earphone 70-6. As a result, the performer 6 who holds the earphone 70-6 can listen to the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM demodulation unit 62-6 of the first receiver 60-6 outputs the L signal 2vch5 and the R signal 2vch6 obtained by demodulating the radio wave signal of the second frequency f2-3 transmitted from the second transmitter 30-3 to the L / R selection unit 65-6. Here, the L / R selection unit 65-6 selects the R signal 2vch6, outputs it to the second monaural amplification unit 64-6, and assigns it to either the L terminal or the R terminal of the earphone 70-6. As a result, the performer 6 who holds the earphone 70-6 can listen to his own performance sound with the other ear.

[0049] The first FM demodulation unit 61-7 of the first receiver 60-7 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the first monaural amplifier unit 63-7, and assigns it to either the L terminal or the R terminal of the earphone 70-7. As a result, the performer 7 who has the earphone 70-7 can hear the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM demodulation unit 62-7 of the first receiver 60-7 outputs the L signal 2vch7 and the R signal 2vch8 obtained by demodulating the radio signal of the second frequency f2-4 transmitted from the second transmitter 30-4 to the L / R selection unit 65-7. Here, the L / R selection unit 65-7 selects the L signal 2vch7, outputs it to the second monaural amplifier unit 64-7, and assigns it to either the L terminal or the R terminal of the earphone 70-7. As a result, the performer 7 who has the earphone 70-7 can hear the performance sound of the performer 7 himself / herself with the other ear.

[0050] The first FM demodulation unit 61-8 of the first receiver 60-8 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the first monaural amplifier unit 63-8, and assigns it to either the L terminal or the R terminal of the earphone 70-8. As a result, the performer 8 who has the earphone 70-8 can hear the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM demodulation unit 62-8 of the first receiver 60-8 outputs the L signal 2vch7 and the R signal 2vch8 obtained by demodulating the radio signal of the second frequency f2-4 transmitted from the second transmitter 30-4 to the L / R selection unit 65-8. Here, the L / R selection unit 65-8 selects the R signal 2vch8, outputs it to the second monaural amplifier unit 64-8, and assigns it to either the L terminal or the R terminal of the earphone 70-8. As a result, the performer 8 who has the earphone 70-8 can hear the performance sound of the performer 8 himself / herself with the other ear.

[0051] The first FM demodulation unit 61-9 of the first receiver 60-9 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the performance sound signal mixed by the mixer unit 20, and outputs it to the first monaural amplifier unit 63-9, which assigns it to either the L terminal or the R terminal of the earphone 70-9. As a result, the performer 9 who has the earphone 70-9 can hear the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM demodulation unit 62-9 of the first receiver 60-9 outputs the L signal 2vch9 and the R signal 2vch10 obtained by demodulating the radio signal of the second frequency f2-5 transmitted from the second transmitter 30-5 to the L / R selection unit 65-9. Here, the L / R selection unit 65-9 selects the L signal 2vch9, outputs it to the second monaural amplifier unit 64-9, and assigns it to either the L terminal or the R terminal of the earphone 70-9. As a result, the performer 9 who has the earphone 70-9 can hear the performance sound of the performer 9 himself / herself with the other ear.

[0052] The first FM demodulation unit 61-10 of the first receiver 60-10 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the monaural signal obtained by demodulating the performance sound signal mixed by the mixer unit 20, and outputs it to the first monaural amplifier unit 63-10, which assigns it to either the L terminal or the R terminal of the earphone 70-10. As a result, the performer 10 who has the earphone 70-10 can hear the performance sound mixed by the mixer unit 20 with one ear. On the other hand, the second FM demodulation unit 62-10 of the first receiver 60-10 outputs the L signal 2vch9 and the R signal 2vch10 obtained by demodulating the radio signal of the second frequency f2-5 transmitted from the second transmitter 30-5 to the L / R selection unit 65-10. Here, the L / R selection unit 65-8 selects the R signal 2vch10, outputs it to the second monaural amplifier unit 64-10, and assigns it to either the L terminal or the R terminal of the earphone 70-10. As a result, the performer 10 who has the earphone 70-10 can hear the performance sound of the performer 10 himself / herself with the other ear.

[0053] In FIG. 9, the fifth receiver 80 includes an FM reception demodulation unit 81 and a stereo amplification unit 82. The FM reception demodulation unit 81 demodulates a stereo signal obtained by demodulating a radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, a stereo signal obtained by demodulating a performance sound signal mixed by the mixer unit 20, and outputs the stereo signal to the stereo amplification unit 82. The stereo amplification unit 82 outputs the signal to the L terminal and the R terminal of the earphone 90. The performers 11 to N who hold the earphone 90 can listen to the performance sound mixed by the mixer unit 20 with both ears.

[0054] As described above, the earphone monitor system according to Embodiment 1 includes a first transmitter that inputs a mixing signal in which a plurality of performance signals are mixed and adjusted, FM-modulates the mixing signal, and transmits the signal at a first frequency, a second transmitter that inputs each of the plurality of performance signals as a channel signal, FM-modulates each channel signal, and transmits the signal at a second frequency, a first FM reception demodulation unit that receives and FM-demodulates the signal of the first frequency from the first transmitter, a second FM reception demodulation unit that receives and FM-demodulates the signal of the second frequency from the second transmitter, and outputs the monaural signal from the first FM reception demodulation unit as one of the L signal and the R signal to the earphone, and outputs the monaural signal from the second FM reception demodulation unit as the other of the L signal and the R signal to the earphone. Therefore, a performer who holds an earphone can listen to the mixed and adjusted performance sound with one ear, and can listen to the performance sound required by the performer including the performer's own performance sound with the other ear.

[0055] Further, the first transmitter includes a first composite signal generation unit that inputs the mixing signal and generates a first composite signal, and a first FM modulation transmitter that FM-modulates the first composite signal generated by the first composite signal generation unit and transmits the signal at the first frequency. The second transmitter includes a second composite signal generation unit that inputs a first channel signal and a second channel signal to generate a second composite signal, and a second FM modulation transmitter that FM-modulates the second composite signal generated by the second composite signal generation unit and transmits it at a second frequency. The first receiver The first FM reception demodulation unit that receives the signal of the first frequency, FM-demodulates it to demodulate the first composite signal, and outputs the monaural signal from the first composite signal. The second FM reception demodulation unit that receives the signal of the second frequency, FM-demodulates it to demodulate the second composite signal, and outputs the first channel signal and the second channel signal from the second composite signal. Since it is provided with an L / R selection unit that outputs one of the first channel signal and the second channel signal output from the second FM reception demodulation unit, A performer with earphones can listen to the performance sound required by the performer himself using the existing FM transmission and reception technology.

[0056] Furthermore, the second transmitter FM-modulates each of the channel signals and transmits them at the second frequency consisting of a plurality of frequencies. Since the second FM reception demodulation unit of the first receiver selects and FM-demodulates a signal of one of the frequencies of the second frequency consisting of a plurality of frequencies from the second transmitter, A performer with earphones can listen to the performance sound required by the performer himself using the existing FM transmission and reception technology.

[0057] Embodiment 2. Next, the earphone monitoring system according to Embodiment 2 will be described with reference to FIGS. 14 to 18. FIG. 14 is a block diagram showing a mixer console of the earphone monitor system according to Embodiment 2, FIG. 15 is a block diagram showing a second transmitter of the earphone monitor system according to Embodiment 2, FIG. 16 is a block diagram showing a first transmitter of the earphone monitor system according to Embodiment 2, FIG. 17 is a block diagram showing a second receiver of the earphone monitor system according to Embodiment 2, and FIG. 18 is a block diagram for explaining demodulation of a first composite signal of the earphone monitor system according to Embodiment 2.

[0058] The earphone monitor system of Embodiment 2 shown in FIGS. 14 to 18 includes a mixer console 10 including a mixer unit 20, one first transmitter 40 including a first composite signal generation unit 41 and a first FM modulation transmission unit 42, five second transmitters 30-1, 30-2, ~30-5 each including a second composite signal generation unit 31-1, 31-2, ~31-5 and a second FM modulation transmission unit 32-1, 32-2, ~32-5, ten second receivers 100-1~100-10 each including a third FM reception demodulation unit 101-1~101-10, a fourth FM reception demodulation unit 102-1~102-10, an L / R selection unit 103-1~103-10, and a stereo synthesis amplification unit 104-1~104-10, eleven to N fifth receivers 80 each including an FM reception demodulation unit 81 and a stereo amplification unit 82, earphones (L / R) 70-1~70-10 connected to the second receivers 100-1~100-10, and earphones (L / R) 90 connected to the fifth receiver 80.

[0059] The mixer console of Embodiment 2 shown in FIG. 14, the second transmitter of Embodiment 2 shown in FIG. 15, and the first transmitter of Embodiment 2 shown in FIG. 16 have the same configurations as the mixer console of Embodiment 1 shown in FIG. 6, the second transmitter of Embodiment 1 shown in FIG. 7, and the first transmitter of Embodiment 1 shown in FIG. 8, respectively, and perform the same operations, so their descriptions are omitted.

[0060] As shown in FIG. 17, the ten second receivers 100-1 to 100-10 for earphone monitors are for performers 1 to 10, for example, and each includes a third FM reception demodulation unit 101-1 to 101-10, a fourth FM reception demodulation unit 102-1 to 102-10, an L / R selection unit 103-1 to 103-10, and a stereo synthesis amplification unit 104-1 to 104-10. Further, the fifth receiver 80 is for performers 11 to N, for example, and includes an FM reception demodulation unit 81 and a stereo amplification unit 82.

[0061] The radio waves of the first frequency f1 transmitted from the first transmitter 40 shown in FIG. 16 and the radio waves of the second frequencies f2-1 to f2-5 transmitted from the second transmitters 30-1 to 30-5 shown in FIG. 15 are taken into the second receivers 100-1 to 100-10 shown in FIG. 17.

[0062] In FIG. 17, the third FM reception demodulation units 101-1 to 101-10 of the second receivers 100-1 to 100-10 FM demodulate the radio wave signal of the first frequency f1 transmitted from the first transmitter 40 to extract a first composite signal vcomp1, and demodulate this first composite signal vcomp1 into a stereo signal.

[0063] FIG. 18 is a block diagram for explaining the demodulation of the first composite signal according to Embodiment 2. In the block diagram of FIG. 18, a low-pass filter 51a, an adder 52a, an oscillator 53a, a band-pass filter 54a, a detection circuit 55a, an adder 56a, and a subtractor 57a are provided. In FIG. 18, the first composite signal vcomp1 can obtain vL + vR by removing components of a predetermined frequency or higher by the low-pass filter 51a. Further, a carrier signal 3sinωst is added to the first composite signal vcomp1 by the oscillator 53a and the adder 52a, and the result is applied to a band-pass filter 54a that passes a predetermined frequency band, thereby obtaining an AM modulated wave. Then, by extracting the envelope of the waveform of this AM modulated wave by the detection circuit 55a, vL - vR can be obtained. Then, by calculating the sum and difference of vL + vR and vL - vR using the adder 56a and subtractor 57a, the stereo signals, i.e., the L signal 2vL and the R signal 2vR, can be obtained.

[0064] In FIG. 17, the configurations and operations of the fourth FM reception demodulation units 102-1 to 102-10 and the L / R selection units 103-1 to 103-10 of the second embodiment are the same as those of the second FM reception demodulation units 62-1 to 62-10 and the L / R selection units 65-1 to 65-10 of the first embodiment, and thus the description thereof is omitted.

[0065] Next, in FIG. 17, the performance sounds heard by the performers 1 to 10 will be described using the second receivers 100-1 to 100-10 and the earphones (L / R) 70-1 to 70-10, respectively.

[0066] The third FM reception demodulation unit 101-1 of the second receiver 100-1 outputs a stereo signal obtained by demodulating the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, a stereo signal obtained by demodulating the performance sound signal mixed in the mixer unit 20, to the stereo synthesis amplifier unit 104-1. On the other hand, the fourth FM reception demodulation unit 102-1 of the second receiver 100-1 outputs the L signal 2vch1 and the R signal 2vch2 obtained by demodulating the radio wave signal of the second frequency f2-1 transmitted from the second transmitter 30-1 to the L / R selection unit 103-1. Here, the L / R selection unit 103-1 selects the L signal 2vch1 and outputs it to the stereo synthesis amplifier unit 104-1. The stereo synthesis amplifier unit 104-1 synthesizes the stereo signal of the performance sound mixed in the mixer unit 20 and the signal played by the performer 1 himself / herself by adjusting the volume balance. As a result, the performer 1 who has the earphone 70-1 can mix the performance sound played by the performer 1 himself / herself with the performance sound mixed in the mixer unit 20 and listen to it while adjusting the volume balance to his / her preference.

[0067] The third FM reception demodulation unit 101-2 of the second receiver 100-2 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the stereo synthesis amplifier unit 104-2. On the other hand, the fourth FM reception demodulation unit 102-2 of the second receiver 100-2 outputs the L signal 2vch1 and the R signal 2vch2 obtained by demodulating the radio signal of the second frequency f2-1 transmitted from the second transmitter 30-1 to the L / R selection unit 103-2. Here, the L / R selection unit 103-2 selects the R signal 2vch2 and outputs it to the stereo synthesis amplifier unit 104-2. The stereo synthesis amplifier unit 104-2 adjusts the volume balance and synthesizes the stereo signal of the performance sound mixed by the mixer unit 20 and the signal played by the performer 2 himself / herself. As a result, the performer 2 who has the earphone 70-2 can mix the performance sound played by the performer 2 himself / herself with the performance sound mixed by the mixer unit 20 and listen to it according to his / her preference in terms of volume balance.

[0068] The third FM reception demodulation unit 101-3 of the second receiver 100-3 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the stereo synthesis amplifier unit 104-3. On the other hand, the fourth FM reception demodulation unit 102-3 of the second receiver 100-3 outputs the L signal 2vch3 and the R signal 2vch4 obtained by demodulating the radio signal of the second frequency f2-2 transmitted from the second transmitter 30-2 to the L / R selection unit 103-3. Here, the L / R selection unit 103-3 selects the L signal 2vch3 and outputs it to the stereo synthesis amplifier unit 104-3. The stereo synthesis amplifier unit 104-3 adjusts the volume balance and synthesizes the stereo signal of the performance sound mixed by the mixer unit 20 and the signal played by the performer 3 himself / herself. As a result, the performer 3 who has the earphone 70-3 can mix the performance sound played by the performer 3 himself / herself with the performance sound mixed by the mixer unit 20 and listen to it according to his / her preference in terms of volume balance.

[0069] The third FM reception demodulation unit 101-4 of the second receiver 100-4 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the stereo synthesis amplification unit 104-4. On the other hand, the fourth FM reception demodulation unit 102-4 of the second receiver 100-4 outputs the L signal 2vch3 and the R signal 2vch4 obtained by demodulating the radio signal of the second frequency f2-2 transmitted from the second transmitter 30-2 to the L / R selection unit 103-4. Here, the L / R selection unit 103-4 selects the R signal 2vch4 and outputs it to the stereo synthesis amplification unit 104-4. In the stereo synthesis amplification unit 104-4, the stereo signal of the performance sound mixed by the mixer unit 20 and the signal played by the performer 4 himself are synthesized by adjusting the volume balance. As a result, the performer 4 having the earphone 70-4 can mix the performance sound played by the performer 4 himself with the performance sound mixed by the mixer unit 20 and listen while adjusting the volume balance to his preference.

[0070] The third FM reception demodulation unit 101-5 of the second receiver 100-5 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal obtained by demodulating the signal of the performance sound mixed by the mixer unit 20, and outputs it to the stereo synthesis amplification unit 104-5. On the other hand, the fourth FM reception demodulation unit 102-5 of the second receiver 100-5 outputs the L signal 2vch5 and the R signal 2vch6 obtained by demodulating the radio signal of the second frequency f2-3 transmitted from the second transmitter 30-3 to the L / R selection unit 103-5. Here, the L / R selection unit 103-5 selects the L signal 2vch5 and outputs it to the stereo synthesis amplification unit 104-5. In the stereo synthesis amplification unit 104-5, the stereo signal of the performance sound mixed by the mixer unit 20 and the signal played by the performer 5 himself are synthesized by adjusting the volume balance. As a result, the performer 5 who has the earphone 70-5 can mix the performance sound of the performer 5 himself / herself with the performance sound mixed by the mixer unit 20 and listen to it with the volume balance adjusted to his / her preference.

[0071] The third FM reception demodulation unit 101-6 of the second receiver 100-6 demodulates the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal obtained by demodulating the performance sound signal mixed by the mixer unit 20, and outputs it to the stereo synthesis amplification unit 104-6. On the other hand, the fourth FM reception demodulation unit 102-6 of the second receiver 100-6 outputs the L signal 2vch5 and the R signal 2vch6 obtained by demodulating the radio wave signal of the second frequency f2-3 transmitted from the second transmitter 30-3 to the L / R selection unit 103-6. Here, the L / R selection unit 103-6 selects the R signal 2vch6 and outputs it to the stereo synthesis amplification unit 104-6. The stereo synthesis amplification unit 104-6 synthesizes the stereo signal of the performance sound mixed by the mixer unit 20 and the signal played by the performer 6 himself / herself with the volume balance adjusted. As a result, the performer 6 who has the earphone 70-6 can mix the performance sound of the performer 6 himself / herself with the performance sound mixed by the mixer unit 20 and listen to it with the volume balance adjusted to his / her preference.

[0072] The third FM reception demodulation unit 101-7 of the second receiver 100-7 demodulates the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal obtained by demodulating the performance sound signal mixed by the mixer unit 20, and outputs it to the stereo synthesis amplification unit 104-7. On the other hand, the fourth FM reception demodulation unit 102-7 of the second receiver 100-7 outputs the L signal 2vch7 and the R signal 2vch8 obtained by demodulating the radio wave signal of the second frequency f2-4 transmitted from the second transmitter 30-4 to the L / R selection unit 103-7. Here, the L / R selection unit 103-7 selects the L signal 2vch7 and outputs it to the stereo synthesis amplification unit 104-7. In the stereo synthesis amplifier section 104-7, the stereo signal of the performance sound mixed by the mixer section 20 and the signal played by the performer 7 himself are synthesized by adjusting the volume balance. As a result, the performer 7 who has the earphone 70-7 can mix his own performance sound with the performance sound mixed by the mixer section 20 and listen according to his preference of the volume balance.

[0073] The third FM reception demodulation section 101-8 of the second receiver 100-8 outputs the stereo signal obtained by demodulating the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal obtained by demodulating the performance sound signal mixed by the mixer section 20, to the stereo synthesis amplifier section 104-8. On the other hand, the fourth FM reception demodulation section 102-8 of the second receiver 100-8 outputs the L signal 2vch7 and the R signal 2vch8 obtained by demodulating the radio wave signal of the second frequency f2-4 transmitted from the second transmitter 30-4 to the L / R selection section 103-8. Here, the L / R selection section 103-8 selects the R signal 2vch8 and outputs it to the stereo synthesis amplifier section 104-8. In the stereo synthesis amplifier section 104-8, the stereo signal of the performance sound mixed by the mixer section 20 and the signal played by the performer 8 himself are synthesized by adjusting the volume balance. As a result, the performer 8 who has the earphone 70-8 can mix his own performance sound with the performance sound mixed by the mixer section 20 and listen according to his preference of the volume balance.

[0074] The third FM reception demodulation section 101-9 of the second receiver 100-9 outputs the stereo signal obtained by demodulating the radio wave signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal obtained by demodulating the performance sound signal mixed by the mixer section 20, to the stereo synthesis amplifier section 104-9. On the other hand, the fourth FM reception demodulation unit 102-9 of the second receiver 100-9 demodulates the radio signal of the second frequency f2-5 transmitted from the second transmitter 30-5, and outputs the L signal 2vch9 and the R signal 2vch10 to the L / R selection unit 103-9. Here, the L / R selection unit 103-9 selects the L signal 2vch9 and outputs it to the stereo synthesis amplification unit 104-9. The stereo synthesis amplification unit 104-9 adjusts the volume balance and synthesizes the stereo signal of the performance sound mixed by the mixer unit 20 and the signal played by the performer 9 himself / herself. As a result, the performer 9 who has the earphone 70-9 can mix his / her own performance sound with the performance sound mixed by the mixer unit 20 and listen to it according to his / her preference for the volume balance.

[0075] The third FM reception demodulation unit 101-10 of the second receiver 100-10 demodulates the radio signal of the first frequency f1 transmitted from the first transmitter 40, that is, the stereo signal of the performance sound mixed by the mixer unit 20, and outputs the demodulated stereo signal to the stereo synthesis amplification unit 104-10. On the other hand, the fourth FM reception demodulation unit 102-10 of the second receiver 100-10 demodulates the radio signal of the second frequency f2-5 transmitted from the second transmitter 30-5, and outputs the L signal 2vch9 and the R signal 2vch10 to the L / R selection unit 103-10. Here, the L / R selection unit 103-10 selects the R signal 2vch10 and outputs it to the stereo synthesis amplification unit 104-10. The stereo synthesis amplification unit 104-10 adjusts the volume balance and synthesizes the stereo signal of the performance sound mixed by the mixer unit 20 and the signal played by the performer 10 himself / herself. As a result, the performer 10 who has the earphone 70-10 can mix his / her own performance sound with the performance sound mixed by the mixer unit 20 and listen to it according to his / her preference for the volume balance.

[0076] As described above, the earphone monitoring system of the second embodiment is A first transmitter that inputs a mixing signal obtained by mixing and adjusting a plurality of performance signals, FM-modulates the mixing signal, and transmits it at a first frequency. A second transmitter that inputs each of the plurality of performance signals as a channel signal, FM-modulates each channel signal, and transmits it at a second frequency. A third FM receiving and demodulating unit that receives and FM-demodulates the signal of the first frequency from the first transmitter, a fourth FM receiving and demodulating unit that receives and FM-demodulates the signal of the second frequency from the second transmitter, and a stereo synthesizing and amplifying unit that stereo-synthesizes the stereo signal from the third FM receiving and demodulating unit and the monaural signal from the fourth FM receiving and demodulating unit. A second receiver that outputs the stereo signal from the stereo synthesizing and amplifying unit to earphones is provided. A performer with earphones can listen to the mixed and adjusted stereo sound with the performance sound required by the performer, including the performer's own performance sound, superimposed as a monitor sound.

[0077] The first transmitter includes a first composite signal generation unit that inputs the mixing signal and generates a first composite signal, and a first FM modulation and transmission unit that FM-modulates the first composite signal generated by the first composite signal generation unit and transmits it at the first frequency. The second transmitter includes a second composite signal generation unit that inputs a first channel signal and a second channel signal and generates a second composite signal, and a second FM modulation and transmission unit that FM-modulates the second composite signal generated by the second composite signal generation unit and transmits it at the second frequency. The second receiver The third FM receiving and demodulating unit that receives and FM-demodulates the signal of the first frequency, demodulates the first composite signal, and outputs a stereo signal from the first composite signal. The fourth FM receiving and demodulating unit that receives and FM-demodulates the signal of the second frequency, demodulates the second composite signal, and outputs the first channel signal and the second channel signal from the second composite signal. The stereo synthesis amplifier unit is provided to stereo synthesize the stereo signal output from the third FM reception demodulation unit and one of the first channel signal and the second channel signal output from the fourth FM reception demodulation unit. A performer with headphones can listen to the performance sound required by the performer himself / herself using the existing FM transmission and reception technology.

[0078] Also, the second transmitter FM-modulates each of the channel signals and transmits them at the second frequency consisting of a plurality of frequencies. Since the fourth FM reception demodulation unit of the second receiver selects and FM-demodulates a signal of one of the frequencies of the second frequency consisting of a plurality of frequencies from the second transmitter, A performer with headphones can listen to the performance sound required by the performer himself / herself using the existing FM transmission and reception technology.

[0079] Embodiment 3. Embodiment 3 is obtained by adding an additional function to the first receiver in the headphone monitoring system of Embodiment 1. That is, the first receivers 60-1 to 60-10 of Embodiment 3 adjust the volume of the monaural signals from the first FM reception demodulation units 61-1 to 61-10 and output them to the headphones 70-1 to 70-10 as one of the L signal and the R signal, and also adjust the volume of the monaural signals from the second FM reception demodulation units 62-1 to 62-10 and output them to the headphones 70-1 to 70-10 as the other of the L signal and the R signal.

[0080] FIG. 19 is a block diagram showing the monaural amplification unit of the first receiver according to Embodiment 3. In FIG. 19, the first monaural amplification unit 63-1 and the second monaural amplification unit 64-1 of the first receiver 60-1 will be described, but the same applies to the first monaural amplification units 63-2 to 63-10 and the second monaural amplification units 64-2 to 64-10 of the first receivers 60-2 to 60-10.

[0081] In FIG. 19, the monaural signal from the first FM reception demodulation unit 61-1 is input to the first monaural amplification unit 63-1. The first monaural amplification unit 63-1 includes an amplifier 630 and a volume 631, adjusts the volume by the volume 631, and outputs it to the earphone 70-1 as one of the L signal and the R signal. Also, the monaural signal selected by the L / R selection unit 65-1 is input to the second monaural amplification unit 64-1. The second monaural amplification unit 64-1 includes an amplifier 640 and a volume 641, adjusts the volume by the volume 641, and outputs it to the earphone 70-1 as the other of the L signal and the R signal.

[0082] As described above, according to the third embodiment, the first receiver adjusts the volume of the monaural signal from the first FM reception demodulation unit and outputs it to the earphone as one of the L signal and the R signal, and adjusts the volume of the monaural signal from the second FM reception demodulation unit and outputs it to the earphone as the other of the L signal and the R signal. Therefore, Each performer can increase the volume of the sound they want to hear, including the maximum volume, and can decrease the volume of the sound they don't want to hear, including zero volume.

[0083] Embodiment 4. Embodiment 4 is obtained by adding an additional function to the stereo synthesis unit of the second receiver in the earphone monitoring system of Embodiment 2. That is, the stereo synthesis amplification units 104-1 to 104-10 of Embodiment 4 perform volume adjustment and left-right balance adjustment on the stereo signals from the third FM reception demodulation units 101-1 to 101-10 and the monaural signals from the fourth FM reception demodulation units 102-1 to 102-10, respectively, and then perform stereo synthesis.

[0084] FIG. 20 is a block diagram showing the stereo synthesis amplification unit of the second receiver according to Embodiment 4. In FIG. 20, the stereo synthesis amplifier section 104-1 of the second receiver 100-1 will be described, but the same applies to the stereo synthesis amplifier sections 104-2 to 104-10 of the second receivers 100-2 to 100-10.

[0085] In the stereo synthesis amplifier section 104-1 of FIG. 20, the L signal input from the third FM reception demodulation section 101-1 is amplified by the amplifier AL, volume-adjusted by the volume control VL, and input to the mixer MIXL. The R signal input from the third FM reception demodulation section 101-1 is amplified by the amplifier AR, volume-adjusted by the volume control VR, and input to the mixer MIXR. The monaural signal input from the L / R selection section 103-1 is amplified by the amplifier AM, volume-adjusted by the volume control VM, and input to the left / right balance volume section BV. In the left / right balance volume section BV, the performance sound based on the monaural signal selected by the L / R selection section 103-1 is distributed to the left and right (L / R) and the volume is adjusted. The performance sound distributed to the left and right (L / R) is input to the mixers MIXL and MIXR, and is mixed and adjusted by the mixers MIXL and MIXR, respectively, and output to the earphone 70-1 via the output amplifiers ALO and ARO.

[0086] As described above, according to the fourth embodiment, the stereo synthesis amplifier section stereo-synthesizes the stereo signal from the third FM reception demodulation section and the monaural signal from the fourth FM reception demodulation section, after adjusting the volume and the left / right balance for each of them. Therefore, each performer can increase the volume of the sound they want to hear, including the maximum volume, and can decrease the volume of the sound they do not want to hear, including zero volume.

[0087] Although various exemplary embodiments and examples are described in the present disclosure, the various features, aspects, and functions described in one or more of the embodiments are not limited to the application of a specific embodiment, but are applicable to the embodiments alone or in various combinations. Accordingly, countless variations not illustrated are envisioned within the scope of the technology disclosed in this specification and the drawings. For example, when at least one component is modified, added, or omitted, or when at least one component is extracted and combined with components of other embodiments, it shall be included.

[0088] Hereinafter, aspects of the present disclosure will be collectively described as appendices.

[0089] (Appendix 1) A first transmitter that inputs a mixing signal obtained by mixing and adjusting a plurality of performance signals, FM-modulates the mixing signal, and transmits it at a first frequency, A second transmitter that inputs each of the plurality of performance signals as a channel signal, FM-modulates each channel signal, and transmits it at a second frequency, A first FM reception demodulation unit that receives and FM-demodulates the signal of the first frequency from the first transmitter, a second FM reception demodulation unit that receives and FM-demodulates the signal of the second frequency from the second transmitter, and outputs the monaural signal from the first FM reception demodulation unit as one of the L signal and the R signal to an earphone, and outputs the monaural signal from the second FM reception demodulation unit as the other of the L signal and the R signal to the earphone, and an earphone monitor system including a first receiver. (Appendix 2) The first transmitter includes a first composite signal generation unit that inputs the mixing signal and generates a first composite signal, and a first FM modulation transmitter that FM-modulates the first composite signal generated by the first composite signal generation unit and transmits it at the first frequency, The second transmitter includes a second composite signal generation unit that inputs a first channel signal and a second channel signal and generates a second composite signal, and a second FM modulation transmitter that FM-modulates the second composite signal generated by the second composite signal generation unit and transmits it at the second frequency, The first receiver is The first FM reception demodulation unit that receives the signal of the first frequency, performs FM demodulation to demodulate the first composite signal, and outputs the monaural signal from the first composite signal; The second FM reception demodulation unit that receives the signal of the second frequency, performs FM demodulation to demodulate the second composite signal, and outputs the first channel signal and the second channel signal from the second composite signal; The earphone monitor system according to Appendix 1, comprising an L / R selection unit that outputs one of the first channel signal and the second channel signal output from the second FM reception demodulation unit. (Appendix 3) The second transmitter FM-modulates each of the channel signals and transmits them at the second frequency composed of a plurality of frequencies. The second FM reception demodulation unit of the first receiver selects a signal of one of the frequencies of the second frequency composed of a plurality of frequencies from the second transmitter and performs FM demodulation. The earphone monitor system according to Appendix 1 or Appendix 2. (Appendix 4) The first receiver adjusts the volume of the monaural signal from the first FM reception demodulation unit and outputs it to the earphone as one of the L signal and the R signal, and adjusts the volume of the monaural signal from the second FM reception demodulation unit and outputs it to the earphone as the other of the L signal and the R signal. The earphone monitor system according to any one of Appendices 1 to 3. (Appendix 5) A first transmitter that inputs a mixing signal in which a plurality of performance signals are mixed and adjusted, FM-modulates the mixing signal, and transmits it at a first frequency; A second transmitter that inputs each of the plurality of performance signals as a channel signal, FM-modulates each of the channel signals, and transmits them at a second frequency; A headphone monitor system comprising a third FM reception demodulation unit that receives and FM demodulates the signal of the first frequency from the first transmitter, a fourth FM reception demodulation unit that receives and FM demodulates the signal of the second frequency from the second transmitter, and a stereo synthesis amplification unit that stereo synthesizes the stereo signal from the third FM reception demodulation unit and the monaural signal from the fourth FM reception demodulation unit, and a second receiver that outputs the stereo signal from the stereo synthesis amplification unit to headphones. (Appendix 6) The first transmitter includes a first composite signal generation unit that inputs the mixing signal and generates a first composite signal, and a first FM modulation transmitter that FM modulates the first composite signal generated by the first composite signal generation unit and transmits it at the first frequency. The second transmitter includes a second composite signal generation unit that inputs a first channel signal and a second channel signal and generates a second composite signal, and a second FM modulation transmitter that FM modulates the second composite signal generated by the second composite signal generation unit and transmits it at the second frequency. The second receiver The third FM reception demodulation unit that receives and FM demodulates the signal of the first frequency to demodulate the first composite signal and outputs a stereo signal from the first composite signal, The fourth FM reception demodulation unit that receives and FM demodulates the signal of the second frequency to demodulate the second composite signal and outputs the first channel signal and the second channel signal from the second composite signal, The headphone monitor system according to Appendix 5, further comprising the stereo synthesis amplification unit that stereo synthesizes the stereo signal output from the third FM reception demodulation unit and one of the first channel signal and the second channel signal output from the fourth FM reception demodulation unit. (Appendix 7) The second transmitter FM modulates each of the channel signals and transmits them at the second frequency composed of a plurality of frequencies. The fourth FM reception demodulation unit of the second receiver selects a signal of one frequency out of the second frequencies consisting of a plurality of frequencies from the second transmitter and performs FM demodulation, and the earphone monitor system according to Appendix 5 or Appendix 6. (Appendix 8) The stereo synthesis amplifier unit performs volume adjustment and left-right balance adjustment on the stereo signal from the third FM reception demodulation unit and the monaural signal from the fourth FM reception demodulation unit, respectively, and performs stereo synthesis, and the earphone monitor system according to any one of Appendices 5 to 7.

Explanation of symbols

[0090] 10 Mixing console, 20 Mixing unit, 40 First transmitter, 41 First composite signal generation unit, 42 First FM modulation transmission unit, 30, 30-1 to 30-5 Second transmitter, 31-1 to 31-5 Second composite signal generation unit, 32-1 to 32-5 Second FM modulation transmission unit, 60, 60-1 to 60-10 First receiver, 61-1 to 61-10 First FM reception demodulation unit, 62-1 to 62-10 Second FM reception demodulation unit, 63-1 to 63-10 First monaural amplifier unit, 64-1 to 64-10 Second monaural amplifier unit, 65-1 to 65-10 L / R selection unit, 70-1 to 70-10 Earphone (L / R), 100-1 to 100-10 Second receiver, 101-1 to 101-10 Third FM reception demodulation unit, 102-1 to 102-10 Fourth FM reception demodulation unit, 103-1 to 103-10 L / R selection unit, 104-1 to 104-10 Stereo synthesis amplifier unit.

Claims

1. A first transmitter that inputs a mixing signal obtained by mixing and adjusting a plurality of performance signals, FM-modulates the mixing signal, and transmits it at a first frequency; A second transmitter that inputs each of the plurality of performance signals as a channel signal, FM-modulates each of the channel signals, and transmits them at a second frequency; A first FM reception demodulation unit that receives and FM-demodulates the signal of the first frequency from the first transmitter, a second FM reception demodulation unit that receives and FM-demodulates the signal of the second frequency from the second transmitter, and a first FM reception demodulation unit that outputs a monaural signal from the first FM reception demodulation unit as one of an L signal and an R signal to an earphone, and outputs a monaural signal from the second FM reception demodulation unit as the other of the L signal and the R signal to the earphone. An earphone monitor system provided with a receiver.

2. The first transmitter includes a first composite signal generation unit that inputs the mixing signal and generates a first composite signal, and a first FM modulation transmission unit that FM-modulates the first composite signal generated by the first composite signal generation unit and transmits it at the first frequency. The second transmitter includes a second composite signal generation unit that inputs a first channel signal and a second channel signal and generates a second composite signal, and a second FM modulation transmission unit that FM-modulates the second composite signal generated by the second composite signal generation unit and transmits it at the second frequency. The first receiver includes The first FM reception demodulation unit that receives and FM-demodulates the signal of the first frequency, demodulates the first composite signal, and outputs the monaural signal from the first composite signal; The second FM reception demodulation unit that receives and FM-demodulates the signal of the second frequency, demodulates the second composite signal, and outputs the first channel signal and the second channel signal from the second composite signal; The earphone monitor system according to claim 1, further comprising an L / R selection unit that outputs one of the first channel signal and the second channel signal output from the second FM reception demodulation unit.

3. The second transmitter FM-modulates each of the channel signals and transmits them at the second frequency composed of a plurality of frequencies. The second FM reception demodulation unit of the first receiver selects and FM-demodulates a signal of one of the frequencies of the second frequency composed of a plurality of frequencies from the second transmitter. The earphone monitor system according to claim 1 or claim 2.

4. The first receiver adjusts the volume of the monaural signal from the first FM reception demodulation unit and outputs it to the earphone as one of the L signal and the R signal, and also adjusts the volume of the monaural signal from the second FM reception demodulation unit and outputs it to the earphone as the other of the L signal and the R signal. The earphone monitor system according to claim 1 or claim 2.

5. A first transmitter that inputs a mixing signal in which a plurality of performance signals are mixed and adjusted, FM-modulates the mixing signal, and transmits it at a first frequency, A second transmitter that inputs each of the plurality of performance signals as a channel signal, FM-modulates each of the channel signals, and transmits them at a second frequency, A third FM reception demodulation unit that receives and FM-demodulates the signal of the first frequency from the first transmitter, a fourth FM reception demodulation unit that receives and FM-demodulates the signal of the second frequency from the second transmitter, and a stereo synthesis amplification unit that stereo-synthesizes the stereo signal from the third FM reception demodulation unit and the monaural signal from the fourth FM reception demodulation unit. An earphone monitor system including a second receiver that outputs a stereo signal from the stereo synthesis amplification unit to an earphone.

6. The first transmitter includes a first composite signal generation unit that inputs the mixing signal and generates a first composite signal, and a first FM modulation transmitter that FM-modulates the first composite signal generated by the first composite signal generation unit and transmits it at the first frequency. The second transmitter includes a second composite signal generation unit that inputs a first channel signal and a second channel signal and generates a second composite signal, and a second FM modulation transmitter that FM-modulates the second composite signal generated by the second composite signal generation unit and transmits it at the second frequency. The second receiver The third FM reception demodulation unit that receives and FM-demodulates the signal of the first frequency to demodulate the first composite signal and outputs a stereo signal from the first composite signal, The fourth FM reception demodulation unit that receives and FM-demodulates the signal of the second frequency to demodulate the second composite signal and outputs the first channel signal and the second channel signal from the second composite signal. The earphone monitor system according to claim 5, further comprising the stereo synthesis amplifier unit that stereo synthesizes the stereo signal output from the third FM reception demodulation unit and one of the first channel signal and the second channel signal output from the fourth FM reception demodulation unit.

7. The second transmitter FM-modulates each of the channel signals and transmits them at the second frequency composed of a plurality of frequencies. The earphone monitor system according to claim 5 or claim 6, wherein the fourth FM reception demodulation unit of the second receiver selects and FM-demodulates a signal of one of the frequencies of the second frequency composed of a plurality of frequencies from the second transmitter.

8. The earphone monitor system according to claim 5 or claim 6, wherein the stereo synthesis amplifier unit stereo synthesizes the stereo signal from the third FM reception demodulation unit and the monaural signal from the fourth FM reception demodulation unit by adjusting the volume and the left-right balance for each of them.

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