EP3244399B1 - Tonverarbeitungssystem und signalverarbeitungsvorrichtung - Google Patents

Tonverarbeitungssystem und signalverarbeitungsvorrichtung Download PDF

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Publication number
EP3244399B1
EP3244399B1 EP17169484.7A EP17169484A EP3244399B1 EP 3244399 B1 EP3244399 B1 EP 3244399B1 EP 17169484 A EP17169484 A EP 17169484A EP 3244399 B1 EP3244399 B1 EP 3244399B1
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EP
European Patent Office
Prior art keywords
signal processing
adjuster
audio signal
processing device
signal
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EP17169484.7A
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English (en)
French (fr)
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EP3244399A1 (de
Inventor
Tetsuya Nagasawa
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Yamaha Corp
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Yamaha Corp
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Priority claimed from JP2017073856A external-priority patent/JP6614194B2/ja
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Publication of EP3244399A1 publication Critical patent/EP3244399A1/de
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/0033—Recording/reproducing or transmission of music for electrophonic musical instruments
    • G10H1/0041—Recording/reproducing or transmission of music for electrophonic musical instruments in coded form
    • G10H1/0058—Transmission between separate instruments or between individual components of a musical system
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/46—Volume control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/04—Studio equipment; Interconnection of studios
    • H04H60/05—Mobile studios
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/04—Studio equipment; Interconnection of studios
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers

Definitions

  • the present invention relates to a technique for processing audio signals that represent sounds such as instrumental or vocal sounds.
  • Patent Document 1 discloses a system including a plurality of units, and that enables musicians to perform music together.
  • audio signals are each supplied from respective electric musical instruments to corresponding units.
  • An audio signal is supplied from an electric musical instrument to a corresponding unit, and is then further supplied to other units via a different path used by other of the respective musical instruments to further supply audio signals.
  • Each unit has a mixer that combines an audio signal supplied from a corresponding electric musical instrument with audio signals supplied from other units and that outputs the combined signals to headphones.
  • Patent Document 1 suffers from a drawback in that a complicated configuration must be implemented to realize the technique. Namely, an audio signal that is supplied to a unit from an electric musical instrument is required to be supplied to other units via a different path used by other of the respective musical instruments to further supply audio signals; and, moreover, a mixer is also required to be mounted to each unit to combine (the supplied) audio signals.
  • Patent Document 2 JP 2014-204205 A (Patent Document 2), US 2009/282967 A1 (Patent Document 3) and D3 WO 01/06751 A1 (Patent Document 4) disclose signal processing devices according to the preamble part of claim 1.
  • Patent Document 1 it is an object of the present invention to provide a simple configuration for mixing audio signals and outputting the mixed audio signals.
  • the present invention provides a signal processing device as defined in claim 1.
  • Advantageous embodiments may be configured according to any of claims 2-8.
  • a sound processing system is provided as defined in claim 9.
  • FIG. 1 illustrates a configuration of a sound processing system 100 according to the first example.
  • the sound processing system 100 according to the first example is a system used for a plurality of users (N users) U _1 to U _N to play musical instruments (N being a natural number of two or more).
  • a signal source 22 _n and a sound emitting device 24 _n are connected to each signal processing device 10 _n .
  • the signal source 22 _n supplies to the signal processing device 10 _n an analog audio signal (an example of a first audio signal) X _n that represents a sound such as an instrumental or vocal sound.
  • a preferable example of the signal source 22 _n is an electric musical instrument that outputs an audio signal X _n of a performance sound according to a performance by a user U _n .
  • electric musical instruments of various types such as string instruments (e.g., guitars or violins), keyboard instruments (e.g., pianos), or percussion instruments (e.g., drums) are used as the signal source 22 _n .
  • a sound receiving device e.g., a microphone
  • a playback device e.g., a portable music player
  • the audio signal X _n is either stereo or monaural.
  • the signal processing device 10 _n is an analog mixer that supplies an audio signal (an example of a second audio signal) Y _n to the sound emitting device 24 _n , the audio signal Y _n being obtained by combining N streams of audio signals X _1 to X _N generated by the different signal sources 22 _n .
  • the sound emitting device 24 _n may, for example, be headphones or earphones worn by a user U _n on his/her ears, and that reproduces a sound represented by the audio signal Y _n supplied from the signal processing device 10 _n (i.e., an ensemble sound obtained by musicians playing music together).
  • each user U _n can perform music while listening through the sound emitting device 24 _n to the sound of N users U _1 to U _N playing music together.
  • This configuration is common among the N signal processing devices 10 _1 to 10 _N , and therefore, the following explanation focuses on a freely selected single signal processing device 10 _n .
  • the signal processing device 10 _n includes a case 11 that is approximately cuboid in shape.
  • a plurality of operators P (P 1 and P 2 ) are mounted to the upper surface of the case 11 and accept the operation of a user U _n .
  • Each operator P according to the first example is a knob that the user U _n can freely rotate.
  • the user U _n can adjust a characteristic of an audio signal Y _n generated by the signal processing device 10 _n .
  • Positioning of the operators P is not limited to the upper surface of the case 11.
  • the signal processing device 10 _n incudes a plurality of terminals (T IN , T OUT , T C1, and T C2 ). More specifically, an input terminal T IN , an output terminal T OUT , a connecting terminal T C1 , and a connecting terminal T C2 are mounted to the sides of the case 11. Positioning of the terminals is not limited to the sides of the case 11.
  • the input terminal T IN is a stereo jack to and from which the signal source 22 _n can be freely connected and disconnected.
  • the terminal T IN accepts input of an audio signal X _n supplied from the signal source 22 _n .
  • the output terminal T OUT is a stereo jack to and from which the sound emitting device 24 _n can be freely connected and disconnected.
  • the terminal T OUT outputs to the sound emitting device 24 _n an audio signal Y _n generated by the signal processing device 10 _n .
  • an audio signal X _n may be transmitted by radio from the signal source 22 _n to the signal processing device 10 _n ; and/or an audio signal Y _n may be transmitted by radio from the signal processing device 10 _n to the sound emitting device 24 _n .
  • the scheme of radio communication between the signal source 22 _n and the signal processing device 10 _n , as well as that between the signal processing device 10 _n and the sound emitting device 24 _n may be freely chosen. However, it is of note that Near Filed Communication, such as Bluetooth (registered trademark), is preferable.
  • the connecting cable T C1 and the connecting cable T C2 of the signal processing device 10 _n are terminals for connecting the signal processing device 10 _n (the subject device) and other signal processing devices (hereinafter, other devices).
  • the connecting cable T C1 and the connecting cable T C2 according to the first example are stereo jacks to and from which the plugs at the end of connecting cables 12 are freely connected and disconnected.
  • a signal processing device 10 _n1 1 to N
  • a signal processing device 10 _n2 1 to N, n1 ⁇ n2).
  • stereo shielded cables are preferably used as connecting cables 12.
  • either one or both of the connecting terminal T C1 and the connecting terminal T C2 of the signal processing device 10 _n is/are connected, via connecting cable(s) 12, to connecting terminal T C1 or/and connecting terminal T C2 of other device(s).
  • N signal processing devices 10 _1 to 10 _N are connected in series. More specifically, the connecting terminal T C1 of each of the second to the N th signal processing devices 10 _n is connected to the connecting terminal T C2 of the immediately preceding signal processing device 10 _n-1 .
  • the connecting terminal T C1 of the signal processing device 10 _1 at one end of a sequence of N signal processing devices 10 _n and the connecting terminal T C2 of the signal processing device 10 _N at the other end are in an open, separate state, and are not connected to any other devices.
  • it is also possible to interconnect the connecting terminal T C1 of the signal processing device 10 _1 and the connecting terminal T C2 of the signal processing device 10 _N i.e., the N signal processing devices 10 _1 to 10 _N may be connected in a circle).
  • An N number (hereinafter, the connection number) of signal processing devices 10 _n that are interconnected may be freely changed.
  • N signal processing devices 10 _1 to 10 _N that correspond to a number of users U _n actually participating in a performance are connected.
  • N 2
  • a signal processing device 10 _1 and a signal processing device 10 _2 are interconnected by one connecting cable 12.
  • signal processing devices 10 _1 to 10 _5 are interconnected by four connecting cables 12.
  • Patent Document 1 discloses a configuration including a station (docking station) in which a predetermined number of spaces (docks) are formed (hereinafter, comparative example 1).
  • a station docking station
  • a predetermined number of spaces spaces
  • the configuration disclosed in comparative example 1 is subject to a problem in that a total number of performers who are able to perform music together is limited.
  • the number N of connected signal processing devices 10 _n can be freely changed, and there is no limit to the number of users U _n .
  • FIG. 2 illustrates an electric configuration of the signal processing device 10 _n .
  • the signal processing device 10 _n according to the first example is an analog circuitry that includes an analog bus 42, a resistive element 44, a first adjuster 46, and a second adjuster 48. These elements are mounted inside the case 11.
  • the analog bus 42, the resistive element 44, the first adjuster 46, and the second adjuster 48 are mounted for each of the left and right channels.
  • first adjuster 46 or the second adjuster 48 may be mounted to the exterior of the case 11; or the first adjuster 46 and the second adjuster 48 may be omitted from the signal processing device 10 _n .
  • the configuration in which the first adjuster 46 and the second adjuster 48 are omitted has an advantage in that a circuitry size and manufacturing cost of the signal processing device 10 _n can be reduced.
  • the analog bus 42 is a signal line that transmits analog signals. As FIG. 2 exemplifies, the analog bus 42 is connected to the connecting terminal T C1 and the connecting terminal T C2 . More specifically, one end of the analog bus 42 is connected to the connecting terminal T C1 and the other end is connected to the connecting terminal T C2 . Accordingly, where N signal processing devices 10 _1 to 10 _N are interconnected, as in the example of FIG. 1 , the analog buses 42 of the signal processing devices 10 _n are electrically connected across the N signal processing devices 10 _1 to 10 _N . In other words, a single bus unit is formed of the analog buses 42 of the N signal processing devices 10 _1 to 10 _N interconnected by connecting cables 12. In FIG.
  • FIG. 1 an example configuration is shown in which the connecting terminal T C1 of a signal processing device 10 _n and the connecting terminal T C2 of a signal processing device 10 _n-1 are connected.
  • the connecting terminal T C1 and the connecting terminal T C2 are electrically equivalent.
  • FIG. 2 it is also possible to mutually connect the connecting terminals T C1 of different signal processing devices 10 _n , or to mutually connect the connecting terminals T C2 of different signal processing devices 10 _n . That is, it is not necessary to distinguish between the connecting terminal T C1 and the connecting terminal T C2 when using the device.
  • FIG. 2 it is also possible to mutually connect the connecting terminals T C1 of different signal processing devices 10 _n , or to mutually connect the connecting terminals T C2 of different signal processing devices 10 _n . That is, it is not necessary to distinguish between the connecting terminal T C1 and the connecting terminal T C2 when using the device.
  • FIG. 1 an example configuration is shown in which the connecting terminal T C1 of a signal processing
  • the analog buses 42 of the signal processing devices 10 _n convey a common audio signal Q that is a mix of audio signals X _1 to X _N of N streams.
  • the resistive element 44 and the first adjuster 46 are disposed on a path W A situated between the input terminal T IN and the analog bus 42.
  • the resistive element 44 (an example of a first resistive element) consists of an electric resistance between the input terminal T IN and the analog bus 42.
  • the first adjuster 46 is disposed between the input terminal T IN and the resistive element 44, and is used to adjust a volume of an audio signal X _n that is supplied from the signal source 22 _n to the input terminal T IN . More specifically, the first adjuster 46 is an amplifier that amplifies an audio signal X _n by a variable gain G A_n .
  • the gain G A_n of the first adjuster 46 is set as variable depending on how the operator P 1 of the signal processing device 10 _n is operated (the position to which the operator P 1 is rotated, i.e., the angle of rotation of the operator P 1 ).
  • an audio signal X _n that is supplied from the signal source 22 _n to the input terminal T IN is then supplied to the analog bus 42 through the resistive element 44 after its volume has been adjusted by the first adjuster 46.
  • the first adjuster 46 also functions as a buffer amplifier that reduces an influence of the output impedance of the signal source 22 _n .
  • the second adjuster 48 is disposed on a path W B situated between the analog bus 42 and the output terminal T OUT , and is used to generate an audio signal Y _n by adjustment of the volume of an audio signal Q supplied from the analog bus 42. More specifically, the second adjuster 48 is an amplifier that amplifies the audio signal Q by a variable gain G B_n .
  • the gain G B_n of the second adjuster 48 is set as variable depending on how the operator P 2 of the signal processing device 10 _n is operated (the position to which the operator P 2 is rotated, i.e., the angle of rotation of the operator P 2 ).
  • the audio signal Y _n that has been adjusted by the second adjuster 48 is output from the output terminal T OUT to the sound emitting device 24 _n .
  • the second adjuster 48 according to the first example also functions as a headphone amplifier that cuts off an electric current that flows from the analog bus 42 to the sound emitting device 24 _n .
  • the first adjuster 46 and the second adjuster 48 are electrically operated by an electric current supplied from a battery contained inside the case 11, for example. However, it is also possible for the first adjuster 46 and the second adjuster 48 to be electrically operated by an electric current supplied from an external electric source.
  • FIG. 3 explains a relationship between audio signals X _n (X _1 to X _N ) and audio signals Y _n (Y _1 to Y _N ).
  • V MIX G A_1 ⁇ X _1 + whil + G A_N ⁇ X _N ).
  • the audio signal Y _n output from the output terminal TOUT of the signal processing device 10 _n can be expressed by the following mathematical expression (2).
  • Y _ n 1 N G B _ n ⁇ V MIX
  • the audio signal Y _n that consists of a mix of N streams of audio signals X _1 to X N supplied from different signal sources 22 _n is output from the signal processing device 10 _n to the sound emitting device 24 _n .
  • the analog bus 42 is connected to another device through the connecting terminal T C1 or the connecting terminal
  • an audio signal Y _n that consists of a mix of the N streams of audio signals X _1 to X _N that are supplied to the input terminals T IN of different signal processing devices 10 _n , to supply the audio signal Y _n to different sound emitting devices 24 _n .
  • a preferable configuration is one in which the resistance element 44 of each signal processing device 10 _n has a sufficiently high resistance value, for example, a resistance value of 3.3k ⁇ . According to this configuration, it is possible to reduce an influence imparted to the volume ratio between the N streams of audio signals X _1 to X _N by the resistance components of the connecting cable 12 and the connecting terminals T C . Furthermore, it is possible to suppress the occurrence of an excessive electric current that may flow via the analog bus 42.
  • the signal processing device 10 _n In a set-up in which a plurality of audio devices such as mixers are interconnected, an input terminal of one audio device and an output terminal of another audio device must be connected.
  • the signal processing device 10 _n according to the first example, no distinction is made in different connecting terminals T C between an input and an output, and therefore, other devices may be connected to any of the connecting terminal T C1 and the connecting terminal T C2 . As a result, a connection error between signal processing devices 10 _n does not occur.
  • the signal processing device 10 _n is realized by analog circuitry, the present example provides an advantage in that problems such as signal delay and complication of circuitry, both due to AID conversion and D/A conversion, do not occur.
  • the voltage of an audio signal Y _n tends to decrease as the connection number N of signal processing devices 10 _n increases, as will be apparent from the mathematical expression (1) stated above.
  • the second example has a configuration for suppressing the decrease in voltage of an audio signal Y _n against the increase of the connection number N.
  • the elements whose effects and functions are substantially the same as those according to the first example will be assigned the same reference signs as those used in the explanation of the first example, and detailed explanation thereof will be omitted as appropriate.
  • FIG. 4 illustrates a configuration of a signal processing device 10 _n according to the second example.
  • a resistive element 52 and a connection switcher 54 are connected to each of the connecting terminal T C (T C1 and T C2 ) of the signal processing device 10 _n .
  • the resistive element 52 (an example of a second resistive element) is an electric resistance with a resistance value R 2 .
  • the connection switcher 54 is a switch for switching the electric connection (conduction or insulation) between the resistive element 52 and an analog bus 42. More specifically, the connection switcher 54 insulates the resistive element 52 from the analog bus 42 during a state of the end plug of a connection cable 12 being inserted in a connection terminal T C of the signal processing device 10 _n (i.e., when another device is being connected). During a state of when the end plug of a connection cable 12 not being inserted in a connection terminal T C of the signal processing device 10 _n (i.e., when another device is not being connected), the connection switcher 54 electrically connects the resistive element 52 to the analog bus 42. For example, a publically known switch-attached jack realizes the connection switcher 54 between a connecting terminal T C and the resistive element 52.
  • FIG. 5 an example set up is illustrated where N signal processing devices 10 _1 to 10 _N according to the second example are connected in series.
  • the connecting terminal T C1 of the signal processing device 10 _1 and the connecting terminal T C2 of the signal processing device 10 _N are in an open, separate state. Therefore, as exemplified in FIG. 5 , the resistive element 52 is connected to the connecting terminal T C1 of the signal processing device 10 _1 and the connecting terminal T C2 of the signal processing device 10 _N , whereas each of the other connecting terminals T C are insulated from the corresponding resistive element 52.
  • FIG. 6 illustrates an equivalent circuitry of FIG. 5 . As will be understood from FIG. 6 , the following mathematical expression is established by Kirchhoff s laws.
  • R 1 stands for the resistance value of the resistive element 44. 1
  • G A _ 1 ⁇ X _ 1 ⁇ Q + G A _ 2 ⁇ X _ 2 ⁇ Q + ⁇ + G A _ N ⁇ X _ N ⁇ Q 2 R 2 Q
  • the second example it is possible to suppress a decrease in a voltage of an audio signal Y _n against an increase in the connection number N.
  • the amount of decrease in the voltage of the audio signal Y _n is 12dB in a case where the connection number N is increased from two to eight.
  • an amount of decrease in the voltage of the audio signal Y _n can be suppressed to 4dB in a case where the connection number N is increased from two to eight.
  • FIG. 7 is a plan view exemplifying an outer view of a signal processing device 10 _n according to the embodiment.
  • an operator P 3 is mounted to the case 11 of the signal processing device 10 _n , in addition to an operator P 1 and an operator P 2 as explained in the description of the first example.
  • the operator P 3 is a knob that a user U _n can freely rotate, similarly to the operator P 1 and operator P 2 .
  • FIG. 8 illustrates an electric configuration of the signal processing device 10 _n according to the embodiment.
  • the signal processing device 10 _n according to the embodiment is configured such that a third adjuster 62 and a signal adder 64 are added to the configuration of the first example.
  • the third adjuster 62 and the signal adder 64 operate by electricity supplied from a battery or an external electric source, similarly to the first adjuster 46 and the second adjuster 48.
  • the third adjuster 62 is disposed on a path W C that branches from a path W A that is between an input terminal T IN and an analog bus 42. More specifically, the path W C in FIG. 8 is a path that branches from a point between the first adjuster 46 and a resistive element 44, and it reaches the signal adder 64 without going through the analog bus 42.
  • An audio signal G A_n ⁇ X _n that has been adjusted by the first adjuster 46 is supplied to the analog bus 42 via the resistive element 44 in substantially the same manner as in the first example. In addition, it is supplied to the third adjuster 62 via the path W C .
  • the third adjuster 62 adjusts the volume of the audio signal G A_ n ⁇ X _n that has been adjusted by the first adjuster 46.
  • An audio signal Z _n that has been adjusted by the third adjuster 62 is supplied to the signal adder 64.
  • the third adjuster 62 of the embodiment includes a normal phase adjuster 622 and a reversed phase generator 623.
  • the normal phase adjuster 622 and the reversed phase generator 623 are interconnected in parallel.
  • the normal phase adjuster 622 adjusts the volume of the audio signal G A_n ⁇ X _n , which is supplied from the path W A to the path W C .
  • the normal phase adjuster 622 is an amplifier that amplifies the audio signal G A_n ⁇ X _n by a variable gain G Ca_n .
  • the gain G Ca_n of the normal phase adjuster 622 is set as variable in accordance with how the operator P 3 is operated (the position to which the operator P 3 is rotated, i.e., the angle of rotation of the operator P 3 ).
  • the reversed phase generator 623 generates an audio signal the phase of which is a reversal of that of an audio signal G A_n ⁇ X _n (i.e., a signal the polarity of which is inverted). More specifically, the reversed phase generator 623 includes a phase inverter 624 and a reversed phase adjuster 626 as exemplified in FIG. 8 .
  • the phase inverter 624 inverts the phase of the audio signal G A_n ⁇ X _n . Any publically known technique may be freely selected for the phase inversion performed by the phase inverter 624.
  • the reversed phase adjuster 626 adjusts the volume of an audio signal (-1)G A_n ⁇ X _n that has been inverted by the phase inverter 624. More specifically, the reversed phase adjuster 626 is an amplifier that amplifies the audio signal (-1)G A_n ⁇ X _n by a variable gain G Cb_n .
  • the gain G Cb_n of the reversed phase adjuster 626 is set as variable in accordance with how the operator P 3 is operated (the angle to which the operator P 3 is rotated). More specifically, the gain G Ca_n and the gain G Cb_n are adjusted in conjunction with each other so that when either the gain G Ca_n or the gain G Cb_n increases, the other decreases.
  • the volume ratio between the audio signal G A_n ⁇ X _n and its reversed phase component is adjusted by the normal phase adjuster 622 and the reversed phase adjuster 626. It is of note that it is possible to invert the order of the phase inversion by the phase inverter 624 and the volume adjustment by the reversed phase adjuster 626. As will be understood from the above explanation, the reversed phase generator 623 carries out phase inversion and volume adjustment with respect to the audio signal G A_n ⁇ X _n .
  • An audio signal Z _n that is obtained by adding an audio signal G Ca_n ⁇ G A_n ⁇ X _n that has been adjusted by the normal phase adjuster 622, and an audio signal G Cb_n ⁇ (-1)G A_n ⁇ X _n that has been adjusted by the reversed phase adjuster 626 is supplied from the third adjuster 62 to the signal adder 64.
  • the audio signal Z _n is represented by the following mathematical expression (4).
  • Z _ n G Ca _ n ⁇ G A _ n ⁇ X _ n + G Cb _ n ⁇ ⁇ 1 G A _ n ⁇ X _ n
  • the signal adder of FIG. 8 is disposed between the analog bus 42 and the output terminal T OUT .
  • the signal adder 64 is disposed between the analog bus 42 and the second adjuster 48, but the signal adder 64 may instead be disposed between the second adjuster 48 and the output terminal T OUT .
  • the gain G Ca_n of the third adjuster 62 is set to be a small value (i.e., when the gain G Cb_n is set to be a large value), as will be understood from the mathematical expression (4), the audio signal G Cb_n ⁇ (-1)G A_n ⁇ X _n that is an inversion of the audio signal G A_n ⁇ X _n becomes relatively dominant within an audio signal Z _n . Accordingly, an audio signal Y _n is generated in which the signal components of the audio signal X _n are suppressed within an audio signal Q that consists of a mix of N streams of audio signals X _1 to X _N .
  • the gain G Ca_n of the third adjuster 62 is set to be a large value (i.e., when the gain G Cb_n is set to be a small value), as will be understood from the mathematical expression (4), the audio signal G A_n ⁇ X _n becomes relatively dominant within the audio signal Z _n . Accordingly, an audio signal Y _n is generated in which the signal components of the audio signal X _n within the audio signal Q is emphasized.
  • the audio signal Q that is common among the N signal processing devices 10 _1 to 10 _N is not influenced by either the gain G Ca_n or the gain G Cb_n .
  • a user U _n can selectively adjust a volume of his/her own performance sound by appropriately adjusting the operator P 3 while listening to the ensemble sound of music played together by N users U _1 to U _N through the sound emitting device 24 _n .
  • a signal processing device 10 _n that was given as an example includes two connection terminals T C (T C1 and T C2 ).
  • the number of connection terminals T C of the signal processing device 10 _n is not limited thereto.
  • a maximum of three other devices may be connected to a signal processing device 10 _n , wherein the signal processing device 10 _n includes three connection terminals T C .
  • connection terminal T C It is also possible to mount a single connection terminal T C to a signal processing device 10 _n .
  • a signal processing device 10 _n includes one connection terminal T C
  • two signal processing devices 10 (10 _1 and 10 _2 ) are connected by a single connection cable 12.
  • a configuration in which a signal processing device 10 _n includes a plurality of connection terminals T C such as in the above-mentioned embodiments, enables a large number of signal processing devices 10 _n to be readily connected in series, as compared with a configuration in which a signal processing device 10 _n includes a single connection terminal T C .
  • FIG. 9 it is also possible to interconnect three or more signal processing devices 10 _n each of which includes one connection terminal T C by use of a connection cable 12 that branches into a plurality of ends.
  • a right adjuster 49 R and a left adjuster 49 L are mounted to the signal processing device 10 _n according to each of the different embodiments as mentioned above.
  • the right adjuster 49 R adjusts the volume of an audio signal X _n of the right channel (R ch ), supplied from the signal source 22 _n to the input terminal T IN ; and the left adjuster 49 L adjusts the volume of an audio signal X _n of the left channel (L ch ), supplied from the signal source 22 _n to the input terminal T IN .
  • the respective gains of the right adjuster 49R and the left adjuster 49L are adjusted in accordance with operation of the operator P 4 (for example, the position to which the operator P 4 is rotated, i.e., the angle of rotation of the operator P 4 ). More specifically, the respective gains of the right adjuster 49R and the left adjuster 49L are adjusted in conjunction with each other so that when either of the gain of the right adjuster 49R or the gain of the left adjuster 49L increases, the other decreases.
  • the audio signal X _n that has been adjusted by the right adjuster 49 R is supplied to the first adjuster 46 of the right channel
  • the audio signal X _n that has been adjusted by the left adjuster 49L is supplied to the first adjuster 46 of the left channel.
  • the volume ratio (i.e., the pan) between the audio signal X _n of the right channel and the audio signal X _n of the left channel are adjusted.
  • the configuration of the third adjuster 62 according to the embodiment is not limited to the example in FIG. 8 .
  • the third adjuster 62 of FIG. 12 includes a normal phase adjuster 622, a reversed phase generator 623, and a variable resistance 628.
  • the functions of the normal phase adjuster 622 and the reversed phase generator 623 are substantially the same as those according to the embodiment.
  • the gain G Ca_n of the normal phase adjuster 622 and the gain G Cb_n of the reversed phase adjuster 626 are set as predetermined fixed values. Moreover, it is of further note that it is also possible to set as variable the gain G Ca_n and the gain G Cb_n according to an instruction from a user, for example.
  • the variable resistance 628 is an element that sets as variable the mix ratio between an audio signal G Ca_n ⁇ G A_n ⁇ X _n that has been adjusted by the normal phase adjuster 622 and an audio signal GC b_n ⁇ (-1)G A_n ⁇ X _n that has been generated by the reversed phase generator 623.
  • the resistance value changes in accordance with operation of the operator P 3 (the position to which the operator P 3 is rotated, i.e., the angle of rotation of the operator P 3 ).
  • the mix ratio between the audio signal G Ca_n ⁇ G A_n ⁇ X _n and the audio signal GC b_n ⁇ (-1)G A_n ⁇ X _n within an audio signal Z _n is set in accordance with operation of the operator P 3 .
  • the variable resistance 628 includes a resistive element that is connected between the output end of the normal phase adjuster 622 and the output end of the reversed phase generator 623, and a contact point at which it comes in contact with the resistive element. The position of the contact point with the resistive element changes in accordance with operation of the operator P 3 .
  • an audio signal Z _n is generated at the contact point, the audio signal Z _n being a result of an audio signal G Ca_n ⁇ G A_n ⁇ X _n and an audio signal G Cb_n ⁇ (-1)G A_n ⁇ X _n being mixed at a mix ratio corresponding to the position of the contact point.
  • a generated audio signal Z _n is supplied from the contact point to the signal adder 64.
  • the third adjuster 62 exemplified in FIG. 12 functions as an amplifier that amplifies an audio signal G A_n ⁇ X _n supplied to a path W C by a gain G C_n .
  • the gain G C_n of the third adjuster 62 can be set as variable within a range from a minimum value being -G Cb_n to a maximum value being G Ca_n , inclusive (-G Cb_n ⁇ G C_n ⁇ G Ca_n ), in accordance with how the operator P 3 is operated.
  • an audio signal Y _n is generated in which the signal component of an audio signal X _n within an audio signal Q (i.e., the performance sound of the subject user U _n ) is selectively emphasized.
  • the gain G C_n is a negative number (G C_n ⁇ 0)
  • an audio signal Y _n is generated in which the signal component of an audio signal X _n within an audio signal Q is selectively suppressed.
  • a switch 629 instead of the variable resistance 628, may be mounted that causes either of the audio signal G Ca_n ⁇ G A_n ⁇ X _n that has been adjusted by the normal phase adjuster 622 and the audio signal G Cb_n ⁇ (-1)G A_n ⁇ X _n that has been generated by the reversed phase generator 623 to be selected and outputted as an audio signal Z _n .
  • the switch 629 of FIG. 13 is controlled, for example in accordance with a user's operation, to select the output of the normal phase adjuster 622, or to select the output of the reversed phase generator 623.
  • the reversed phase generator 623 (the phase inverter 624 and the reversed phase adjuster 626) in the third adjuster 62 exemplified in FIG. 8 , FIG. 12, or FIG. 13 may be omitted.
  • the third adjuster 62 is configured solely by the normal phase adjuster 622, it is possible to adjust the degree of emphasis of an audio signal X _n according to the gain G Ca_n , although it is not possible to selectively suppress the signal component of the audio signal X _n within the audio signal Y _n .
  • the normal phase adjuster 622 of FIG. 8 , FIG. 12, or FIG. 13 may be omitted.
  • the third adjuster 62 is mounted in the path W C that branches from a path between the first adjuster 46 and the resistive element 44, the third adjuster 62 may be mounted in a path W C that branches from a path between an input terminal T IN and the first adjuster 46.(6)
  • the input terminal T IN and the output terminal T OUT are mounted to one side of the case 11
  • the connecting terminal T C1 is mounted to the left side of the case 11
  • the connecting terminal T C2 is mounted to the right side of the case 11.
  • the positions of the plurality of terminals (T IN , T OUT , T C1, and T C2 ) are not limited to these examples.
  • the connecting terminal T C1, the connecting terminal T C2 , and the output terminal T OUT may be mounted to one side of the case 11 and the input terminal T IN to another side.
  • a signal processing device includes a plurality of connecting terminals each connected to respective ones of a plurality of other signal processing devices that are different from the subject signal processing device, from among the plurality of signal processing devices; an analog bus connected to the plurality of connecting terminals; an input terminal connected to the analog bus and that accepts an input of a first audio signal; and an output terminal connected to the analog bus and that outputs a second audio signal to a sound emitting device.
  • an analog bus that is connected to an input terminal and an output terminal is connected to a different signal processing device through a connecting terminal.
  • each of the plurality of connecting terminals is connected to a different signal processing device. Accordingly, a relatively large number of signal processing devices can be connected as compared with a configuration in which a signal processing device has only one connecting terminal.
  • a configuration that additionally includes a first resistive element that is disposed between an input terminal and an analog bus is also preferable.
  • a signal processing device includes a first adjuster disposed between the input terminal and the analog bus, and that adjusts the volume of the first audio signal.
  • the first adjuster adjusts the volume of the first audio signal, and thus it is possible to control the volume ratio between a plurality of first audio signals within the second audio signal.
  • a signal processing device includes a second adjuster disposed between the analog bus and the output terminal, and that generates a second audio signal by adjusting the volume of an audio signal supplied from the analog bus.
  • the second audio signal is generated by adjusting the volume of the audio signal supplied from the analog bus, and thus it is possible to adjust the volume of the second audio signal while maintaining the volume ratio between the plurality of first audio signals.
  • the signal processing device includes a second resistive element arranged in correspondence to each of the plurality of connecting terminals; and a connection switcher arranged with respect to the second resistive element, and the connection switcher in a case in which any one of the plurality of other signal processing devices is connected to any one of the plurality of connecting terminals, insulates from the analog bus a second resistive element of the plurality of second resistive elements that corresponds to the connected one of the connecting terminals; and in a case in which none of the plurality of other signal processing devices is connected to one of the plurality of connecting terminals that corresponds to the second resistive element, connects the second resistive element to the analog bus.
  • the second resistive element is insulated from the analog bus when another signal processing device is connected to a connection terminal, while the second resistive element is connected to the analog bus when no other signal processing device is connected to the connecting terminal.
  • the signal processing device includes: a third adjuster that adjusts a volume of an audio signal supplied to a path branched from a path between the input terminal and the analog bus; and a signal adder disposed between the analog bus and the output terminal and that adds an audio signal supplied from the analog bus and the audio signal that has been adjusted by the third adjuster, and the third adjuster includes a reversed phase generator that performs phase inversion and volume adjustment with respect to the audio signal.
  • the audio signal supplied from the analog bus and the audio signal that has been adjusted by the reversed phase generator of the third adjuster are added together, the adjustment being made in the direction in which the volume of the audio signal of the subject device is suppressed.
  • the third adjuster further includes a normal phase adjuster connected in parallel with the reversed phase generator and that adjusts a volume of the audio signal, and the third adjuster causes a gain set by the reversed phase generator and a gain set by the normal phase adjuster to change in conjunction with each other, so that when either of a gain of the reversed phase generator or a gain of the normal phase adjuster increases, the other decreases.
  • the volume of the subject device is adjusted in a direction in which the volume is either suppressed or emphasized against the audio signal supplied from the analog bus, in accordance with the ratio between the gain of the reversed phase generator and the gain of the normal phase adjuster. Accordingly, it is possible to selectively adjust the volume of the audio signal of the subject device within the second audio signal without influencing the audio signals of the analog buses extending across a plurality of signal processing devices.
  • the third adjuster further includes a normal phase adjuster connected in parallel with the reversed phase generator and that adjusts a volume of the audio signal; and a variable resistance connected between an output end of the reversed phase generator and an output end of the normal phase adjuster, and that sets as variable a mix ratio between an audio signal outputted from the reversed phase generator and an audio signal outputted from the normal phase adjuster.
  • the volume of the subject device is adjusted in a direction in which the volume is either suppressed or emphasized against the audio signal supplied from the analog bus, in accordance with the mix ratio between the audio signal outputted from the reversed phase generator and the audio signal outputted from the normal phase adjuster. Accordingly, it is possible to selectively adjust the volume of the audio signal of the subject device within the second audio signal without influencing the audio signals of the analog buses extending across a plurality of signal processing devices.
  • the third adjuster further includes a normal phase adjuster connected in parallel with the reversed phase generator; and a switch that selectively outputs either one of an audio signal outputted from the reversed phase generator and an audio signal outputted from the normal phase adjuster.
  • the volume of the subject device is adjusted in a direction in which the volume is either suppressed or emphasized against the audio signal supplied from the analog bus, in accordance with either the audio signal outputted from the reversed phase generator or the audio signal outputted from the normal phase adjuster. Accordingly, it is possible to selectively adjust the volume of the audio signal of the subject device within the second audio signal without influencing the audio signals of the analog buses extending across a plurality of signal processing devices.
  • a sound processing system includes a plurality of signal processing devices according to any one of the preferable examples of the first aspect as exemplified above. More specifically, the sound processing system according to the second aspect is a sound processing system that includes a plurality of separate signal processing devices, and each of the plurality of signal processing devices includes: a plurality of connecting terminals each connected to respective ones of a plurality of other signal processing devices that are different from the subject signal processing device, from among the plurality of signal processing devices; an analog bus connected to the plurality of connecting terminals; an input terminal connected to the analog bus and that accepts an input of a first audio signal; and an output terminal connected to the analog bus and that outputs a second audio signal to a sound emitting device.

Claims (9)

  1. Signalverarbeitungsvorrichtung (11), aufweisend:
    mehrere Verbindungsanschlüsse (TC1, TC2), die jeweils mit Entsprechenden von mehreren anderen Signalverarbeitungsvorrichtungen, die von der betreffenden Signalverarbeitungsvorrichtung verschieden sind, verbindbar sind;
    einen analogen Bus (42), der mit den mehreren Verbindungsanschlüssen verbunden ist;
    einen Eingangsanschluss (TIN), der mit dem analogen Bus verbunden ist und der eine Eingabe eines ersten Audiosignals annimmt; und
    einen Ausgangsanschluss (TOUT), der mit dem analogen Bus verbunden ist und ein zweites Audiosignal an eine Klangausgabevorrichtung ausgibt,
    dadurch gekennzeichnet, dass die Signalverarbeitungsvorrichtung ferner aufweist:
    eine erste Einstelleinrichtung (62), die eine Lautstärke eines Audiosignals einstellt, das an einen Pfad geliefert wird, der von einem Pfad zwischen dem Eingangsanschluss und dem analogen Bus abzweigt; und
    eine Signal-Addiereinrichtung (64), die zwischen dem analogen Bus und dem Ausgangsanschluss angeordnet ist und die ein von dem analogen Bus geliefertes Audiosignal und das Audiosignal, das von der ersten Einstelleinrichtung eingestellt wurde, addiert,
    wobei die erste Einstelleinrichtung einen Umkehrphasen-Generator (623) aufweist, der eine Umkehrung einer Phase und die Einstellung einer Lautstärke bezüglich des Audiosignals durchführt.
  2. Signalverarbeitungsvorrichtung gemäß Anspruch 1,
    wobei die erste Einstelleinrichtung ferner eine Normalphasen-Einstelleinrichtung aufweist, die mit dem Umkehrphasen-Generator parallel geschaltet ist und eine Lautstärke des Audiosignals einstellt, und
    wobei die erste Einstelleinrichtung veranlasst, dass eine von dem Umkehrphasen-Generator eingestellte Verstärkung und eine von der Normalphasen-Einstelleinrichtung eingestellte Verstärkung sich in Abhängigkeit voneinander ändern, sodass bei einer Zunahme entweder einer Verstärkung des Umkehrphasen-Generators oder einer Verstärkung der Normalphasen-Einstelleinrichtung die jeweils andere abnimmt.
  3. Signalverarbeitungsvorrichtung gemäß Anspruch 1,
    wobei die erste Einstelleinrichtung ferner aufweist:
    eine Normalphasen-Einstelleinrichtung, die mit dem Umkehrphasen-Generator parallel geschaltet ist und die eine Lautstärke des Audiosignals einstellt; und
    einen Regelwiderstand, der zwischen einem Ausgangsende des Umkehrphasen-Generators und einem Ausgangsende der Normalphasen-Einstelleinrichtung geschaltet ist und der als Variable ein Mischungsverhältnis zwischen einem von dem Umkehrphasen-Generator ausgegebenen Audiosignal und einem von der Normalphasen-Einstelleinrichtung ausgegebenen Audiosignal einstellt.
  4. Signalverarbeitungsvorrichtung gemäß Anspruch 1,
    wobei die erste Einstelleinrichtung ferner aufweist:
    eine Normalphasen-Einstelleinrichtung, die mit dem Umkehrphasen-Generator parallel geschaltet ist; und
    einen Schalter, der selektiv entweder ein von dem Umkehrphasen-Generator ausgegebenes Audiosignal oder ein von der Normalphasen-Einstelleinrichtung ausgegebenes Audiosignal ausgibt.
  5. Signalverarbeitungsvorrichtung gemäß einem der Ansprüche 1 bis 4, ferner aufweisend ein Widerstandselement, das zwischen dem Eingangsanschluss und dem analogen Bus angeordnet ist.
  6. Signalverarbeitungsvorrichtung gemäß einem der Ansprüche 1 bis 4, ferner aufweisend eine zweite Einstelleinrichtung, die zwischen dem Eingangsanschluss und dem analogen Bus angeordnet ist und die eine Lautstärke des ersten Audiosignals einstellt.
  7. Signalverarbeitungsvorrichtung gemäß einem der Ansprüche 1 bis 4, ferner aufweisend eine zweite Einstelleinrichtung, die zwischen dem analogen Bus und dem Ausgangsanschluss angeordnet ist und die das zweite Audiosignal dadurch erzeugt, dass sie eine Lautstärke eines Audiosignals einstellt, das von dem analogen Bus geliefert wird.
  8. Signalverarbeitungsvorrichtung gemäß einem der Ansprüche 1 bis 4, ferner aufweisend:
    entsprechende Widerstandselemente, die jeweils in entsprechender Beziehung zu den mehreren Verbindungsanschlüssen angeordnet sind; und
    eine Verbindungsschalteinrichtung, die bezüglich der Widerstandselemente angeordnet ist,
    wobei die Verbindungsschalteinrichtung in einem Fall, in dem eine der mehreren anderen Signalverarbeitungsvorrichtungen mit einem beliebigen der mehreren Verbindungsanschlüsse verbunden ist, das entsprechende Widerstandselement, das dem Verbundenen der Verbindungsanschlüsse entspricht, von dem analogen Bus isoliert, und in einem Fall, in dem keine der mehreren anderen Signalverarbeitungsvorrichtungen mit einem der mehreren Verbindungsanschlüsse verbunden ist, das den jeweiligen Widerstandselementen entspricht, die jeweiligen Widerstandselemente mit dem analogen Bus verbindet.
  9. Klangverarbeitungssystem, aufweisend mehrere getrennte Signalverarbeitungsvorrichtungen gemäß einem der Ansprüche 1 bis 8, wobei Verbindungsanschlüsse der Signalverarbeitungsvorrichtungen mit jeweiligen anderen Signalverarbeitungsvorrichtungen aus den mehreren Signalverarbeitungsvorrichtungen verbunden sind.
EP17169484.7A 2016-05-11 2017-05-04 Tonverarbeitungssystem und signalverarbeitungsvorrichtung Active EP3244399B1 (de)

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JP2016095217 2016-05-11
JP2017073856A JP6614194B2 (ja) 2016-05-11 2017-04-03 音響処理システムおよび信号処理装置

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US6801630B1 (en) * 1997-08-22 2004-10-05 Yamaha Corporation Device for and method of mixing audio signals
US6690677B1 (en) * 1999-07-20 2004-02-10 Serconet Ltd. Network for telephony and data communication
JP2007304128A (ja) * 2006-05-08 2007-11-22 Roland Corp 効果装置
JP2011523810A (ja) * 2008-05-15 2011-08-18 ジャムハブ エルエルシー 電子楽器および電子音楽デバイスからの入力を組合せるためのシステム
US9214147B2 (en) * 2012-06-11 2015-12-15 William R. Price Audio signal distortion using a secondary audio signal for enhanced control of psycho-acoustic and musical effects
JP6282034B2 (ja) * 2012-11-27 2018-02-21 ヤマハ株式会社 ヘッドホン
JP6263855B2 (ja) * 2013-04-02 2018-01-24 ヤマハ株式会社 ヘッドホン

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