JP3514128B2 - Mixer and headphone amplifier - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixer for mixing an audio signal and distributing a mixing result, and a headphone amplifier for supplying the audio signal to a headphone.

[0002]

2. Description of the Related Art As is well known, a mixer is a means for mixing audio signals obtained from a plurality of sound sources. Currently, mixers are used for a wide range of applications, and various types of mixers are provided to meet various requirements.

FIG. 8 exemplifies a relatively inexpensive portable mixer of this type of mixer. According to this mixer, audio signals such as playing sounds of musical instruments up to n channels can be mixed to generate a stereo format audio signal composed of L and R2 channels having desired localization and balance. Therefore, by using this mixer, it is possible to record an audio signal obtained by the ensemble of a plurality of people, or to output the performance sound of the ensemble from the speaker.

When performing an ensemble using a mixer in this way, each performer is concerned about whether or not the ensemble is as desired, and not the ensemble sound emitted by the speaker. I want to directly check the ensemble sound generated by the mixer.

Here, when the mixer has a headphone output terminal, by connecting the headphone to this terminal and using it, it is possible to confirm the ensemble sound produced by the mixer via the headphone.

However, as shown in FIG. 8, a portable mixer of this type usually has only one headphone output terminal, so that only one performer can use the headphone.

In order for all performers to confirm the ensemble sound by using the headphones, it is necessary to provide a distribution means for further distributing the audio signal obtained from the headphone output terminal of the mixer to a plurality of headphones. Therefore, as the distributing means, a headphone amplifier as shown in FIG. 9 is often used together with a mixer.

[0008]

According to such a configuration in which the mixer and the headphone amplifier are used together, each performer can listen to the mixed ensemble sound through the headphones during the ensemble. Therefore, each performer can confirm whether or not the ensemble is performed as desired as a whole.

However, for the performer, even if he / she can confirm the entire ensemble, it is not enough, and he is concerned about whether or not the performance he or she is performing is what he / she wants. Therefore, in addition to the mixed ensemble sound, it is desired that each performer can listen to his / her own musical instrument performance.

As a method for satisfying such a demand, for example, as shown in FIG. 10, it is conceivable to prepare a mixer for each performer.

In the example shown in FIG. 10, the mixer M1
~ Mn correspond to each of the n performers, and the headphone output terminal of the mixer M1 is used for the headphones used by the first player, and the headphone output terminal of the mixer M2 is used for the headphones used by the second player. The headphone output terminals of the mixer Mn are connected to the headphones used by the nth performer.

Each of the mixers M1 to Mn includes a first player to an nth player.
The respective audio signals of the first channel to the nth channel obtained by the performance of the performer are mixed. Here, in order for each performer to confirm his or her own musical instrument performance, each mixer does not mix audio signals for n channels with uniform weighting, but rather an audio signal of a performer's performance sound corresponding to the mixer. The respective mixers may be set so that the audio signals of the respective channels are mixed by weighting so that is emphasized more than others. That is, for example, the mixer M1 corresponding to the first player is
Mixing is performed by increasing the volume of the audio signal of the first channel obtained by the performance of the performer as compared with the other channels, and the mixer M2 corresponding to the second performer is the second corresponding to the second performer. The volume of the audio signal of a channel is made louder than other channels for mixing.
That's how mixing is done.

With such a configuration, each performer can listen to his or her solo performance at a high volume against the background of the ensemble sound heard at a low volume, and not only the entire ensemble but also himself / herself. You can check whether the solo performance of is performed as you want.

However, it is extremely uneconomical to prepare a mixer for each performer in order to make each performer hear his or her solo performance. To get the ensemble sound,
Originally, it is sufficient to perform one kind of mixing using one mixer.

As described above, there has been a demand for a technical means which enables each performer to listen to his or her solo performance in addition to the ensemble sound at the time of performing the ensemble. It was not offered before.

The present invention has been made under such a background, and an object thereof is to provide a simple and economical mixer and headphone amplifier which satisfy the above-mentioned requirements.

[0017]

The invention according to claim 1 is
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 input via the plurality of input channels, Moreover, each audio signal before being inputted to the first mixing means is taken out to be a solo performance audio signal,
Means for adding to each of the audio signals output via the plurality of output channels, the second mixing means having a volume for independently adjusting the volume of each solo performance audio signal. The featured mixer is the gist.

According to a second aspect of the present invention, there is provided a first mixing means for mixing respective audio signals inputted via a plurality of input channels, and the first mixing means is inputted via the plurality of input channels and the first mixing means. Each of the audio signals before being input to the mixing means is taken out as a solo performance audio signal, and the solo performance audio signals corresponding to a plurality of input channels are respectively mixed with the audio signals after mixing by the first mixing means. Second mixing means for outputting through a plurality of output channels, each having a adjusting means for adjusting a mixing ratio of the solo performance audio signal and the audio signal after being mixed by the first mixing means. A mixer characterized by comprising means.

According to a third aspect of the present invention, an audio signal input from the outside is supplied to the mixer, and a solo performance audio signal having a volume designated by an operator is generated from the audio signal and output from the mixer. A main feature is a headphone amplifier that outputs to a headphone together with an audio signal after mixing.

According to a fourth aspect of the present invention, an audio signal input from the outside is supplied to the mixer, a solo performance audio signal is generated from the audio signal, and the mixed audio signal is output from the mixer. The headphone amplifier is a headphone amplifier which is provided with adjusting means for adjusting a mixing ratio between the mixed audio signal and the solo performance audio signal.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below in order to make the present invention easier to understand. Such an embodiment shows one aspect of the present invention, does not limit the present invention, and can be arbitrarily modified within the scope of the present invention.

A. First Embodiment FIG. 1 is a circuit diagram showing the configuration of a mixer according to the first embodiment of the present invention.

The outline of the specifications of the mixer according to this embodiment is as follows. a. This mixer has n input channels and n output channels corresponding to the respective input channels. The one shown in FIG. 1 illustrates the configuration in the case of n = 3. In the present embodiment, in order to facilitate understanding of the invention, the case where the input channels and the output channels are in a one-to-one correspondence without excess or deficiency is taken as an example, but all of the input channels and the output channels are The one-to-one correspondence is not always necessary, and a part of both may correspond to one-to-one correspondence.

B. This mixer mixes up to n channels of audio signals input via the input channels. The audio signal to be mixed includes a monaural format audio signal and a stereo format audio signal composed of two channels of L and R, but the mixing is performed in a stereo format. Therefore, a monaural audio signal is converted into a stereo audio signal prior to mixing. At the time of this conversion, it is possible to give a stereophonic audio signal a desired sound image localization. Also, for audio signals originally input in stereo format,
Prior to mixing, the sound image localization and the left-right balance can be adjusted.

C. The mixing result is output as a stereo audio signal via each output channel. In addition to this mixing result, an audio signal input from each input channel can be converted into a stereo format audio signal in which the sound image is localized in the center and output from the output channel corresponding to the input channel.
In the following, the audio signal output in this way is called a solo performance audio signal.

D. It is possible to adjust the volume of each input audio signal to be mixed and adjust the weight of each input audio signal at the time of mixing. Also,
The weighting of each input audio signal at the time of this mixing is left as it is, and the volume of the solo performance audio signal output from each output channel together with the mixing result can be adjusted independently for each output channel.

The above is the outline of the specifications of the mixer according to the present embodiment. Next, a specific configuration example of this mixer will be described with reference to FIG.

In FIG. 1, monaural input terminals 11 and 12 are input terminals corresponding to the first and second input channels, respectively, to which monaural audio signals are input. Also, the stereo input terminals 13L and 1
Reference numeral 3R is an input terminal corresponding to the third input channel, and receives a stereo format audio signal having two channels of L and R. The stereo input terminal 13L
Regarding 13 and 13R, it is also possible to use only one input terminal 13L as a monaural input terminal.

Input terminals 11, 12, 13L and 13R
The audio signals of the respective channels input from the head amplifier 31, after being adjusted by the adjusting volumes 21, 22, 23L and 23R to a level within an appropriate range.
Amplified by 32, 33L and 33R respectively. Here, the adjustment volumes 23L and 23R are adapted to be adjusted in conjunction with each other.

Head amplifiers 31, 32, 33L and 3
The audio signal corresponding to each channel output from 3R is branched into two for each channel. Then, one of the two branched audio signals is supplied to a mixing processing system for mixing between the channels, and the other is supplied to a volume control system of the solo performance audio signal provided for each channel. .

First, the mixing processing system will be described. Input volume 41, 42, 43L and 43R
Is a means for adjusting the volume of each audio signal to be mixed, or in other words, a means for weighting the mixing of each audio signal. Here, the input volumes 43L and 43R are adapted to be adjusted in conjunction with each other. Headphone amplifier 31, 32,
The respective audio signals output from the 33L and 33R are adjusted in volume by passing through the input volumes 41, 42, 43L and 43R, and then the respective signals are respectively output by the inverting amplifiers 51, 52, 53L and 53R. The level is reversed.

The output signals of the inverting amplifiers 51 and 52 are input to the sound image localization sections 61 and 62, and are converted into audio signals composed of L and R2 channels having sound image localization corresponding to these operation states. It Also,
A sound image localization and balance adjustment unit 63 is connected to each output unit of the inverting amplifiers 53L and 53R. Therefore, this makes it possible to adjust the sound image position and the left-right balance of the stereo audio signals output from the inverting amplifiers 53L and 53R.

In this way, from the sound image localization sections 61 and 62 and the inverting amplifiers 63L and 63R, the audio signals of the first to third channels consisting of two channels of L and R, respectively, can be obtained. Those corresponding to R channels are output to the L channel bus 71L, and those corresponding to R channels are output to the R channel bus 71R.

The audio signals of the first to third channels output to the L channel bus 71L are mixed on the same bus. The level of the mixed audio signal is inverted by the inverting amplifier 72L, and is input to one input terminal of each of the inverting amplifiers 81L to 83L corresponding to the first channel to the third channel via the L channel bus 73L. Is entered.

On the other hand, the audio signals of the first to third channels output to the R channel bus 71R are also mixed on the same bus. The level of the mixed audio signal is inverted by the inverting amplifier 72R, and the inverting amplifier 81R corresponding to each of the first to third channels is passed through the R channel bus 73R.
It is input to one input terminal of each of ~ 83R. The above is the configuration of the mixing processing system.

In this way, the head amplifiers 31, 32, 33 are
One of the signals obtained by branching the output signals of L and 33R into two is subjected to the processing of the mixing processing system described above, but the remaining signals of the two branches are each independently amplified and soloed. It becomes a performance audio signal and is delivered to each output system corresponding to the first to third channels. That is, the volume of the audio signal of the first channel output from the head amplifier 31 is adjusted by the solo volume 91, and then the inverting amplifier 8 is output as the solo playing audio signal of the first channel with the sound image localized in the center.
It is input to the other input terminal of each of 1L and 81R. The volume of the audio signal output from the head amplifier 32 is adjusted by the solo volume 99, and then the other input of each of the inverting amplifiers 82L and 82R is input as the solo playing audio signal of the second channel with the sound image localized in the center. Input to the terminal. The volume of each of the audio signals of the L and R channels output from the head amplifiers 33L and 33R is adjusted by the solo volumes 93L and 93R, and then the inverting amplifier 83 is output as the solo performance audio signal of the third channel.
It is input to the other input terminal of each of L and 83R.
Here, the solo volumes 93L and 93R are adapted to be adjusted in conjunction with each other.

With the above configuration, the input audio signal of each input channel branched before the mixing processing system is transmitted as a solo performance audio signal. For example, the inverting amplifier 81L is supplied to the mixing channel supplied via the L channel bus 73L. After audio signal and solo volume 9
An audio signal obtained by adding the solo performance audio signal of the first channel whose volume is adjusted by 1 is output. Other inverting amplifiers 81R, 82L, 82R, 83
The same applies to L and 83R, and an audio signal obtained by adding the mixed audio signal and the solo performance audio signal of each channel via the solo volume 91, 92, 93L or 93R is output.

Each inverting amplifier 81L, 81R, 82L, 8
The output signals of 2R, 83L and 83R are output volumes 101L, 101R, 102L, 102R and 103.
Inverting amplifiers 111L and 111 via L and 103R
R, 112L, 112R, 113L and 113R are respectively input, and are supplied to the headphones connected to the headphone output terminals 121 to 123 by these inverting amplifiers. Here, the output volumes 101L and 101R are means for adjusting the output volume for the headphones connected to the headphone output terminal 121, and are adjusted in conjunction with each other. Output volumes 102L and 102R, output volume 103
The same applies to L and 103R.

A specific method of using the mixer according to this embodiment described above will be described below. First, three performers (hereinafter, referred to as first to third performers)
Suppose that each perform an ensemble by playing an electronic musical instrument or an electric musical instrument one by one, the audio signal of the performance sound of the first player is input to the monaural input terminal 11 and the audio signal of the performance sound of the second player. Is a monaural input terminal 12
So that the audio signal of the performance sound by the third player is supplied to the stereo input terminals 13L and 13R,
The three electronic musical instruments and the mixer are interconnected. And
The first to third performers each have a headphone output terminal 12
Use your headphones by connecting them to 1-123.

In such a connected state, the first to the third
When the ensemble is performed by the performer, the audio signals obtained from the three electronic musical instruments are input to the mixer, mixed in the mixer, and the mixed ensemble audio signals are output to the L channel buses 73L and R. It is output onto the channel bus 73R. The audio signal of the ensemble sound includes the audio signals of the respective performance sounds of the first to third performers, and the volume of each of these audio signals is the same as that of each of the input volumes 41, 42, 43L and 43R. It depends on the operation amount. Therefore, by adjusting the input volumes 41, 42, 43L and 43R, audio signals of ensemble sounds in which the respective performance sounds are mixed with desired weighting are obtained on the L channel bus 73L and the R channel bus 73R. In addition, input volume 4
The audio signals that have passed through 1, 42, 43L and 43R are mixed after passing through the sound image localization sections 61 and 62 and the sound image localization and balance adjustment section 63. Therefore, by adjusting each of the sound image localization units 61 and 62 and the sound image localization and balance adjustment unit 63, each audio signal of each performance sound of the first to third performers constituting the audio signal of the ensemble sound after mixing is converted into each audio signal. A desired sound image localization or left-right balance can be provided.

Each headphone connected to the headphone output terminals 121 to 123 has an audio signal of the ensemble sound obtained by the above mixing and a solo performance audio signal corresponding to each of the performance sounds of the first to third performers. Is added to each audio signal. Here, the volume of the solo performance audio signal output together with the audio signal of the ensemble sound from each of the headphone terminals 121 to 123 depends on the operation amount of the solo volumes 91, 92, 93L and 93R. Therefore, each performer can listen to his or her solo performance sound at a desired volume together with the ensemble sound by operating each of the solo volumes 91, 92, 93L and 93R. Here, each performer has output volumes 101L to 103L and 101R to 103
By operating one of Rs corresponding to the headphone used by itself, the overall volume of the ensemble sound and the solo performance sound heard by each can be adjusted.
Further, if it is not necessary to listen to the solo performance sound, each performer can listen to only the ensemble sound by narrowing the corresponding solo volume to the minimum level.

As described above, the solo performance audio signal is a stereo type audio signal in which a sound image is localized in the center. Therefore, when the sound image of each performance sound included in the ensemble sound is localized at a position other than the center, it is possible to distinguish each constituent sound of the ensemble sound from the solo performance sound by each sound image position. .

FIG. 2 shows a more specific example of use of the embodiment described above. The mixer used in FIG. 2 is configured such that a circuit for one channel is added to the mixer shown in FIG. 1 to handle audio signals of up to four channels. However, the basic principle is the same as that shown in FIG.

First, FIG. 2A shows a connection state between the mixer and an electronic musical instrument or an electric musical instrument. This Figure 2
In (a), "INPUT 1" to "INPUT"
Reference numeral 3 "denotes a monaural input terminal, which corresponds to the monaural input terminal 11 or 12 in FIG. 1. A mute piano, a mute wind instrument, and an electronic metronome are connected to each of these monaural input terminals. Each of the obtained audio signals is input, and "INP
UT 4 ″ is a stereo input terminal and corresponds to the stereo input terminals 13L and 13R in FIG. 1. An electronic drum is connected to this stereo input terminal, and an audio signal obtained from this is input. Further, "PHONES 1" to "PHONES 4" are headphone output terminals, and correspond to the headphone output terminals 121 to 123 in Fig. 1. In this usage example, the player of the mute piano is "PHONES 1". The headphones are connected and used, the player of the muffling wind instrument is connected to the headphones of "PHONES 2", and the player of the electronic drum is "PHONES 2".
I am using headphones connected to 4 ".

In the present case, the "silent piano" is a natural musical instrument piano equipped with a silencing mechanism for preventing the hammer from striking a string and an electronic sound source for electronically producing a musical tone by detecting a key operation. There is, for example, JP-A-6-59.
It refers to that disclosed in Japanese Patent No. 667, etc. Further, in the present case, "silenced wind instrument" is a natural instrument wind instrument that includes a silencer for reducing the generated sound and a circuit for picking up the generated sound, electrically amplifying it, and outputting it. It refers to that disclosed in Japanese Patent Laid-Open No. 8-194473. Furthermore, in the present case, the "electronic drum" has a plurality of pads and electronically generates a musical tone in response to a hitting operation of each pad, and a tone color can be arbitrarily assigned to each pad. In addition, it is possible to set the sound image localization position for each pad (or each tone color),
The musical sound localized for each pad (or each tone color) is stereo-outputted.

FIGS. 2 (b) and 2 (c) show examples of setting states of the volumes provided in the mixer.
In these figures, "PHONES 1" to "PHO"
The four uppermost volumes labeled NES 4 "are volumes for adjusting the volume of the headphone output of the first to fourth channels, and are the output volumes 101L to 103L and 101R to 1R in FIG.
It corresponds to 03R. In addition, "SOLO 1" to "S
The four volumes in the second tier labeled "OLO 4" are solo volumes and correspond to the solo volumes 91, 92, 93L and 93R in Fig. 1. Also, in the third tier, "PAN 1""～" PAN 3 "
The three manipulators additionally marked are manipulators for adjusting the sound image localization of the audio signals of the first channel to the third channel, and correspond to the sound image localization section 61 or 62 in FIG. Also, next to these, "PAN / BAL"
An operator indicated by is an operator for adjusting the sound image localization or the left-right balance of the audio signal of the fourth channel, and corresponds to the sound image localization and balance adjustment unit 63 in FIG. 1. And "INPUT 1" ~
The four volume controls at the bottom labeled "INPUT 4" are volumes for adjusting the volume of the audio signals of the first to fourth channels to be mixed, and are input volumes 41, 42 in FIG. 43L
And 43R.

The operation in each setting state shown in FIGS. 2B and 2C is as follows. First, in the setting state shown in FIG. 2B, a mute piano player, a muffler wind instrument player, and an electronic drum player can hear the ensemble sound through headphones. In this ensemble sound, the sound image of the playing sound of the muted piano is localized on the left, the sound image of the playing sound of the muffling wind instrument is located on the right, and the sound images of the playing sounds of the electronic metronome and the electronic drum are located in the center. On the other hand, since the solo volume of the first channel, the second channel and the fourth channel is not limited to the minimum level, each performer should listen to the ensemble sound and their own solo performance with the sound image localized in the center. You can That is, for example, the player of the mute piano can hear that the mute piano performance is being performed by himself / herself in accordance with the electronic drum performance and the electronic metronome in the center against the background of the ensemble sound. Also, each performer can operate the solo volume,
It is possible to maintain the mixing state of the ensemble as it is and adjust only the volume of the solo performance.

Next, in the setting state shown in FIG.
Except for the channels, the input volume is turned down to the lowest level. Therefore, even if a muted piano, a muted wind instrument, and an electronic drum are played, and even if an audio signal is output from each of these musical instruments, they are not mixed and the electronic metronome corresponding to the third channel is output. Only the output audio signal is subject to mixing. As a result, as the mixed audio signal, only the audio signal of the electronic metronome sound is supplied to the headphones of the performers of the muted piano, the muted wind instrument, and the electronic drum. Therefore, the mute piano, muffled wind instrument, and electronic drum players perform the electronic metronome sound and their own solo performance sound by adjusting the respective solo volumes corresponding to the first channel, the second channel, and the fourth channel. You can play each instrument while listening to with headphones.

Although the first embodiment of the present invention has been described above, the present embodiment can be carried out by adding various modifications to the configuration shown in FIG. For example, in the configuration shown in FIG. 1, the inverting amplifiers 81L to 83L are
And output volume 101L in the latter stage of 81R to 83R
103L and 101R to 103R are arranged, the output volumes 101L to 103L are inserted between the L channel bus 73L and the inverting amplifiers 81L to 83L, and the output volumes 101R to 103R are inverted to the R channel bus 73R. You may change to the structure inserted between amplifier 81R-83R. When changing in this way, each performer must adjust the output volume to the headphones for only the ensemble sound, not the volume of the ensemble sound and the solo performance sound as a whole, by operating the output volume corresponding to their own headphones. You can

B. Second Embodiment FIG. 3 is a circuit diagram showing a configuration of a mixer which is a second embodiment of the present invention. It should be noted that, in each part of the device shown in FIG. 3, parts common to those in the device shown in FIG. 1 described above are denoted by the same reference numerals, and description thereof will be omitted.

In the above-described first embodiment, the solo performance audio signals of the respective channels are the solo volume 9 respectively.
After the volume is adjusted by 1, 92, 93L and 93R, the inverting amplifiers 81L to 83L and 81R to 8
It is configured to be input to 3R. On the other hand, in the present embodiment, as shown in FIG. 3, the solo volumes 91, 92,
The balance adjustment unit 910 is provided without providing 93R and 93R.
L, 920L and 930L are inverted amplifiers 81L to 83
The balance adjustment units 910R, 920R, and 930R are provided in the preceding stage of L, respectively, in the preceding stages of the inverting amplifiers 81R to 83R.

Here, for example, the balance adjusting section 910L
Is a means for mixing and outputting the mixed audio signal (audio signal of the ensemble sound) supplied via the L channel bus 73L and the solo playing audio signal of the first channel. That is, the balance adjusting unit 910L multiplies the audio signal of the ensemble sound from the L channel bus 73L by x times (0 ≦ x ≦ 1) and also
Multiply the solo playing audio signal of the channel by (1-x),
These multiplication results are added and output. The balance adjusting section 910R is means for mixing and outputting the audio signal of the ensemble sound from the R channel bus 73R and the solo performance audio signal of the first channel. Each of these balance adjusting units 910L and 910R is connected to a balance volume (not shown) corresponding to the first channel, and the user operates this balance volume to allow the balance adjusting units 910L and 910R to operate. The mixing ratio x of the ensemble sound and the solo performance sound in each output signal can be adjusted. Similarly, the balance adjusting units 920L and 920R and 930L and 930R are means for mixing and outputting the audio signal of the ensemble sound and the solo performance audio signal of the second channel, and the audio signal of the ensemble sound and the third channel. Is a means for mixing and outputting the solo performance audio signal, and the mixing ratio of each is adjusted by each balance volume corresponding to each of the second and third channels.

FIG. 4 is a circuit diagram showing a configuration example of each balance adjusting section 910L. As shown in the figure, this balance adjustment unit is composed of an operational amplifier 130, a variable resistor 131, and a feedback resistor 132. Here, in the operational amplifier 130, the non-inverting input terminal is grounded, and the feedback resistor 132 is interposed between the inverting input terminal and the output terminal. The variable resistor 131 is supplied with the audio signal of the ensemble sound from the L channel bus 73L at one fixed end, and is supplied with the solo performance audio signal of the first channel at the other fixed end. The slider of the variable resistor 131 is connected to the inverting input terminal of the operational amplifier 130. The position of the slider in the variable resistor 131 is adjusted by the operation of the balance volume corresponding to the above-mentioned first channel. According to this configuration example, the audio signal of the ensemble sound and the solo playing audio signal of the first channel can be mixed by the mixing ratio corresponding to the position of the slider of the variable resistor 131 and output from the operational amplifier 130. . Other balance adjustment units 910R, 920L, 920
R, 930L, and 930R have the same configuration as that described above.

FIG. 5 shows a specific example of use of the embodiment described above. In the use example shown in FIGS. 2B and 2C described above, “SOLO 1” to
There were four volumes labeled "SOLO 4". On the other hand, in the present embodiment, FIG.
As shown in (b) and (c), "BALANCE"
There are four volumes labeled "1" to "BALANCE 4". These four volumes are output signals from the headphone output terminals labeled "PHONES 1" to "PHONES 4". 5 is an operator for adjusting the balance between the ensemble sound and the solo performance sound.
“S” attached to the left side of the four volumes labeled “1” to “BALANCE 4” is an initial of “SOLO”, and “E” attached to the right side is an initial of “ENSEMBLE”. .

More specifically, for example, "BALAN
The volume labeled "CE 1" is provided corresponding to, for example, the balance adjustment units 910L and 910R in FIG. 3, and the balance adjustment units 910L and 910R of the respective sounds when mixing the ensemble sound and the solo performance sound are mixed. It is an operator for adjusting the mixing ratio.
The same applies to the volume added with "2" and the like, and is used for adjusting the mixing ratio of the ensemble sound and the performance sound in the balance adjustment unit corresponding to a channel different from the volume added with "BALANCE 1".

As described above, according to this embodiment, by operating the balance adjusting units 910L and 910R, the balance adjusting units 920L and 920R, and the balance adjusting units 930L and 930R, the balance between the ensemble sound and the solo performance sound can be obtained. Can be adjusted. As a result, for example, the volume of the solo performance sound can be increased and the volume of the ensemble sound can be decreased at the same time, and it is not necessary to adjust the volumes of the ensemble sound and the solo performance sound independently, which improves the operability of the mixer. be able to.

C. Third Embodiment FIG. 6 shows the configuration of the third embodiment of the present invention. The mixer according to the first embodiment includes a circuit as an original mixer that mixes an audio signal and supplies a mixing result to each headphone, and a circuit that generates a solo performance audio signal and supplies it to the corresponding headphone. The present invention was implemented as an integrated device including the above. On the other hand, in this embodiment, a circuit for generating a solo performance audio signal and supplying it to the headphones is provided for each headphone as a separate device separated from the original mixer.

In FIG. 6, MX is a mixer for mixing audio signals input through n input channels and outputting the mixing result through n output channels. The audio signals input through the respective input channels are mixed in a monaural format and a stereo format, but the mixing result is output as a stereo format audio signal. Note that FIG.
In addition, the notation "M" is attached to the signal line transmitting the monaural audio signal, and the symbol "S" is attached to the signal line transmitting the stereo audio signal.

EMI1 to EMIn are electronic musical instruments or electric musical instruments, respectively. H1 to Hn are headphones used by performers of these electronic musical instruments EMI1 to EMIn. HA1 to HAn are portable headphone amplifiers attached to, for example, belts of the performers, and supply audio signals of the performance sounds output from the electronic musical instruments EMI1 to EMIn to the mixer MX as they are. A solo performance audio signal is generated from the audio signal, and the headphone amplifiers H1 to Hn are generated together with the mixed audio signal output from the mixer MX.
Is to be supplied to.

These headphone amplifiers HA1 to HA
There are two types of n, which include a solo volume 201a and an adder 202, and one including a solo volume 201b and an adder 202.
Here, the solo volume 201a is a volume for adjusting the volume of a monaural audio signal. The solo volume 201b is a volume for adjusting the volume of a stereo audio signal.

In the example shown in FIG. 6, a monaural audio signal is output from the electronic musical instrument EMI1. A headphone amplifier having a solo volume 201a like the headphone amplifier HA1 is connected to the electronic musical instrument that outputs a monaural audio signal. The monaural audio signal input to this headphone amplifier is the solo volume 20
In the process of passing through 1a and being supplied to the adder 202, the volume is adjusted to a volume corresponding to the operation amount of the solo volume 201a, and is converted into a stereo format audio signal in which a sound image is localized in the center.

On the other hand, a stereo format audio signal is output from the electronic musical instrument EMIn. For electronic musical instruments that output stereo format audio signals,
Headphone amplifier HAn-like solo volume 20
A headphone amplifier having a configuration including 1b is connected. The stereo format audio signal input to the headphone amplifier passes through the solo volume 201b, so that only the volume is adjusted as it is,
It is supplied to the adder 202.

In the above configuration, the electronic musical instrument EMIk
The audio signals of the performance sounds output from (k = 1 to n) are input to the headphone amplifiers HAk (k = 1 to n) and are branched into two in each headphone amplifier HAk (k = 1 to n). Then, one of the two branched audio signals is directly supplied to the mixer MX for mixing, and the audio signal obtained by this mixing is returned to the headphone amplifier HAk (k = 1 to n). In addition, each headphone amplifier HAk (k = 1 to n)
In (2), the other of the two branched audio signals is input to the adder 202 as a solo performance audio signal via the solo volume 201a or 201b. Then, the solo performance audio signal is added by the adder 202 to the mixed audio signal supplied from the mixer MX, and the headphone amplifier HA.
Headphones Hk (k = 1 to n) from k (k = 1 to n)
Is supplied to.

Each performer can adjust the volume of the audio signal of the solo performance sound by adjusting the solo volume 201a or 201b. Therefore, each performer can play each electronic musical instrument while listening to his or her own solo performance by adjusting the solo volume 201a or 201b in addition to the ensemble sound generated by the mixer MX.

D. Fourth Embodiment FIG. 7 is a diagram showing the configuration of a headphone amplifier that is the fourth embodiment of the present invention. In the third embodiment, the headphone amplifier HA1 has a solo volume 20.
1a and the adder 202 are connected to the headphone amplifier HAn.
Was provided with a solo volume 201b and an adder 202, respectively. On the other hand, in the present embodiment, the headphone amplifier HA1 includes the balance adjustment unit 20.
3a, the headphone amplifier HAn is the balance adjustment unit 2
03b are provided respectively. Here, for electronic musical instruments that output monaural audio signals,
Balance adjustment unit 20 such as headphone amplifier HA1
A headphone amplifier having a configuration having 3a is connected. A headphone amplifier having a balance adjustment unit 203b such as a headphone amplifier HAn is connected to an electronic musical instrument that outputs a stereo audio signal.

In the example shown in FIG. 7, a monaural audio signal is output from the electronic musical instrument EMI1. The monaural audio signal input to the headphone amplifier HA1 is converted into a stereo audio signal in which a sound image is localized in the center in the process of being supplied to the balance adjustment unit 201a.

On the other hand, the electronic musical instrument EMIn outputs a stereo format audio signal. The stereo format audio signal input to the headphone amplifier HAn is supplied to the balance adjustment unit 203b as it is.

In the above configuration, the electronic musical instrument EMIk
The audio signal of the performance sound output from (k = 1 to n) is 2 in the headphone amplifier HAk (k = 1 to n).
Branched. Of these two branched audio signals,
One is supplied to the mixer MX for mixing, and the mixed audio signal is a headphone amplifier HA.
balance adjusting unit 203a or 2 in k (k = 1 to n)
03b. The other signal of the two-branched audio signals is supplied to the balance adjusting section 203a or 203b as a solo performance audio signal.

Here, the balance adjustment units 203a and 203
03b is a balance adjustment unit 91OL-93 shown in FIG.
It has the same configuration as 0L and 910R to 930R. That is, the mixed audio signal supplied from the mixer MX is multiplied by x (0 ≦ x ≦ 1), and
Electronic musical instrument EMIk (k = 1 to 1) input from the other terminal
The solo performance audio signal from n) is multiplied by (1-x),
Headphones Hk (k =
1 to n). Each performer has a balance adjustment unit 20.
By operating 3a or 203b, the mixing ratio x of the ensemble sound and the solo performance sound in the output signal to the headphones Hk (k = 1 to n) can be adjusted.

As described above, according to this embodiment, the balance between the ensemble sound and the solo performance sound can be adjusted by operating the balance adjusting section 203a or 203b. As a result, for example, the volume of the solo performance sound can be increased and the volume of the ensemble sound can be decreased at the same time, and it is not necessary to adjust the volume of the ensemble sound and the solo performance sound independently, which improves the operability of the headphone amplifier. Can be made.

[0071]

As described above, according to the mixer or headphone amplifier of the present invention, when performing the ensemble using these, each performer listens to his / her solo performance in addition to the ensemble sound. Since it is possible, it is possible to confirm not only the entire ensemble but also whether or not one's own musical instrument performance is performed as desired.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of a mixer that is a first embodiment of the present invention.

FIG. 2 is a diagram showing a usage example of the same embodiment.

FIG. 3 is a circuit diagram showing a configuration of a mixer that is a second embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a balance adjusting unit in a mixer which is a second embodiment of the present invention.

FIG. 5 is a diagram showing a usage example of the same embodiment.

FIG. 6 is a diagram showing a configuration of a system using a headphone amplifier according to a third embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a system using a headphone amplifier according to a fourth embodiment of the present invention.

FIG. 8 is a diagram showing a conventional portable mixer.

FIG. 9 is a diagram showing a conventional headphone amplifier.

FIG. 10 is a diagram showing an example of use of a conventional mixer.

[Explanation of symbols]

11,12 ... Mono input terminals, 13L, 13R ...
Stereo input terminals, 41, 42, 43L, 43R ... Input volume, 91, 92, 93L, 93R ... Solo volume, 71L, 73L ... L channel bus, 71
R, 73R ... R channel bus, 101L to 103
L, 101R-103R ... Output volume, 121-
123 ... Headphone output terminal.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04R 3/00 310 G10K 15/04 304 H03G 3/02 H03H 11/34 H04H 7/00

Claims (4)

(57) [Claims] 1. A first audio signal is mixed via a plurality of input channels, and the mixed audio signal is output via a plurality of output channels.
Mixing means, and each audio signal that is input through the plurality of input channels and before being input to the first mixing means is taken out as a solo performance audio signal and is output through the plurality of output channels. A means for adding to each of the output audio signals, the volume having a volume for independently adjusting the volume of each of the solo performance audio signals;
And a mixing means of the above. 2. A first mixing means for mixing respective audio signals input via a plurality of input channels; and an input via the plurality of input channels and an input to the first mixing means. Each of the audio signals before being mixed is taken out as a solo performance audio signal, and the solo performance audio signals corresponding to a plurality of input channels are mixed with the audio signals after mixing by the first mixing means to obtain a plurality of output channels. And a second mixing means each having an adjusting means for adjusting a mixing ratio of the solo performance audio signal and the audio signal after being mixed by the first mixing means. A mixer characterized by. 3. An audio signal, which is input from the outside, is supplied to the mixer, a solo performance audio signal having a volume designated by an operator is generated from the audio signal, and the mixed audio signal is output from the mixer. A headphone amplifier that is also output to headphones. 4. An externally input audio signal is supplied to a mixer, and a solo performance audio signal is generated from the audio signal, mixed with an audio signal after mixing output from the mixer, and output to a headphone. A headphone amplifier, comprising: adjusting means for adjusting a mixing ratio of the mixed audio signal and the solo performance audio signal.