In an audio system, a control device includes a setting part that sets automatic compensation of each of a plurality of input ports of the input device into either ON state or OFF state and an adjusting part that adjusts an analog gain of each of the plurality of input ports. The input device includes the plurality of input ports, each input port including an amplifier that controls a level of an analog signal input to the input port based on the analog gain adjusted by the adjusting part, an ad converter that converts the analog signal from the amplifier into a digital signal, a compensator that controls a level of the digital signal from the ad converter based on a digital gain of the input port, and a selector that selects one of the digital signal from the ad converter and the digital signal from the compensator. when the automatic compensation of an input port of the input device is set into the ON state from the OFF state by the setting part of the control device, the digital gain of the input port varies in accordance with the analog gain of the input port so that a value change in the analog gain of the input port by the adjusting part is compensated by a value change in the digital gain of the input channel.
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0. 21. A method comprising:
receiving, by an audio input port, an input analog audio signal;
controlling a level of the input analog audio signal based on an analog gain parameter to output an output analog audio signal;
converting the output analog audio signal into an input digital audio signal;
controlling a level of the input digital audio signal based on a digital gain parameter to output an output digital audio signal;
wherein,
(a) when an on/off state of gain compensation of the audio input port is set into an ON state from an OFF state,
setting the digital gain parameter to a predetermined value and
selecting a first switch contact for outputting the output digital audio signal,
(b) while the on/off state of the gain compensation of the audio input port is in the ON state,
adjusting the digital gain parameter inversely to a direction of a value change of the analog gain parameter, and
(c) when the on/off state of the gain compensation of the audio input port is set into the OFF state from the ON state,
selecting a second switch contact for outputting the input digital audio signal.
0. 6. An apparatus comprising:
an audio input port for receiving an input analog audio signal, the audio input port comprising:
an analog-amplifier for controlling a level of the input analog audio signal based on an analog gain parameter to output an output analog audio signal;
an ad converter for converting the output analog audio signal into an input digital audio signal;
a digital-amplifier for controlling a level of the input digital audio signal based on a digital gain parameter to output an output digital audio signal; and
a switch for selecting one of a first switch contact for outputting the output digital audio signal from the digital-amplifier and a second switch contact for outputting the input digital audio signal from the ad converter,
wherein,
(a) when an on/off state of gain compensation of the audio input port is set into an ON state from an OFF state by the apparatus,
the digital-amplifier sets the digital gain parameter to a predetermined value and
the switch selects the first switch contact for outputting the output digital audio signal from the digital-amplifier,
(b) while the on/off state of the gain compensation of the audio input port is in the ON state,
the digital-amplifier adjusts the digital gain parameter inversely to a direction of a value change of the analog gain parameter, and
(c) when the on/off state of the gain compensation of the audio input port is set into the OFF state from the ON state by the apparatus,
the switch selects the second switch contact for outputting the input digital audio signal from the ad converter.
1. An audio system comprising a control device and a plurality of devices being connected to an audio network, the plurality of devices including an input device and a mixing device,
wherein the control device controls each of the plurality of devices directly or via the audio network according to manipulation performed by an operator, the control device including a setting part that sets automatic compensation of each of a plurality of input ports of the input device into either ON state or OFF state and an adjusting part that adjusts an analog gain of each of the plurality of input ports,
wherein the input device includes the plurality of input ports and a sender, each input port including an amplifier that controls a level of an analog signal input to the input port based on the analog gain adjusted by the adjusting part and that outputs an analog signal, an ad converter that converts the analog signal output from the amplifier into a digital signal from the ad converter, a compensator that controls a level of the digital signal from the ad converter based on a digital gain of the input port and that outputs a digital signal, and a selector that selects one of the digital signal from the ad converter and the digital signal output from the compensator, and the sender sending the digital signals selected by the selectors of the plurality of input ports via the audio network,
wherein the mixing device includes a receiver that receives the digital signals sent by the input device via the audio network, a plurality of input channels, each of which controls characteristics of each one of the digital signals from received by the receiver, and a mix bus that mixes the digital signals from whose characteristics are controlled by the plurality of input channels, and
wherein, (a) when the automatic compensation of an input port of the input device is set into the ON state from the OFF state by the setting part of the control device, the digital gain of the input port is set to a predetermined value and the selector of the input port selects the digital signal output from the compensator, (b) while the automatic compensation of an input port is in the ON state, the digital gain of the input port varies in accordance with the analog gain of the input port so that a value change in the analog gain of the input port by the adjusting part is compensated by a value change in the digital gain of the input channel port, and, (c) when the automatic compensation of an input port of the input device is set into the OFF state from the ON state by the setting part, the selector of the input port of the input device selects the digital signal from the ad converter.
2. The audio system according to
3. The audio system according to
4. The audio system according to
wherein said another audio system comprises another control device having the same construction as the control device of the audio system, and another mixing device having the same construction as the mixing device of the audio system, said another mixing device being controlled exclusively by said another control device,
wherein the mixing device and the input device of the audio system are controlled exclusively by the control device of the audio system,
wherein said another mixing device includes a another receiver that receives the digital signals sent by the input device of the audio system via the audio network, a another plurality of input channels, each of which controls characteristics of each one of the digital signals from the another receiver, and a another mix bus that mixes the digital signals from the another plurality of input channels, and
wherein, while the automatic compensation of an input port o of the input device of the audio system is in the ON state, the another receiver of said another mixing device receives the a digital signal having the a level which is not changed by the analog gain of the input port adjusted by the adjusting part of the control device of the audio system.
5. The audio system according to
0. 7. The apparatus according to claim 6, wherein the digital-amplifier is configured for adjusting the digital gain parameter by an amount different from the value change of the analog gain parameter.
0. 8. The apparatus according to claim 6, wherein the switch is configured to perform, in accordance with a control signal from a remote device, the selecting of the first switch contact or the selecting of the second switch contact.
0. 9. The apparatus according to claim 6, wherein the gain compensation is automatic.
0. 10. The apparatus according to claim 6, wherein the digital-amplifier is configured for adjusting the digital gain parameter after the analog gain parameter is adjusted by the value change.
0. 11. The apparatus according to claim 6, wherein the apparatus is an IO device.
0. 12. The apparatus according to claim 11, the IO device comprising the audio input port and another of the audio input port.
0. 13. The apparatus according to claim 6, wherein the on/off state of the gain compensation is set into the ON state or the OFF state in accordance with a control signal from a remote device.
0. 14. The apparatus according to claim 13, wherein the audio input port is configured for operably coupling to a plurality of channels,
wherein the on/off state of the gain compensation of the audio input port is common to all channels of the plurality of channels.
0. 15. The apparatus according to claim 6, wherein the apparatus is a device controlled by a control device, the control device comprising a console having a control panel which is provided thereon with a plurality of controls for controlling the device.
0. 16. The apparatus according to claim 6, wherein the apparatus is a device controlled by a control device, the control device comprising a personal computer running thereon a control program for controlling the device.
0. 17. The apparatus according to claim 6, wherein the audio input port is operably coupled to a first receiver of a first mixing device for receiving a first input audio signal, the first input audio signal based on the adjusted digital gain parameter,
wherein the audio input port is operably coupled to a second receiver of a second mixing device for receiving a second input audio signal, the second input audio signal based on the adjusted digital gain parameter,
wherein, due to the adjusting, by the digital-amplifier, of the digital gain parameter inversely to the direction of the value change of the analog gain parameter, respective levels of the first input audio signal and the second input audio signal do not have to be respectively adjusted at the first mixing device and at the second mixing device inversely to the direction of the value change of the analog gain parameter.
0. 18. The apparatus according to claim 6, wherein the audio input port is operably coupled to a first receiver of a first mixing device for receiving a first input audio signal, the first input audio signal based on the adjusted digital gain parameter,
wherein the audio input port is operably coupled to a second receiver of a second mixing device for receiving a second input audio signal, the second input audio signal based on the adjusted digital gain parameter,
wherein, due to the adjusting, by the digital-amplifier, of the digital gain parameter inversely to the direction of the value change of the analog gain parameter, respective levels of the first input audio signal and the second input audio signal do not change at the first mixing device and at the second mixing device.
0. 19. The apparatus according to claim 6, wherein the apparatus is one device among a plurality of devices operably coupled to an audio network, wherein the audio network is capable of transporting a plurality of audio signals and at least one control signal at the same time between the plurality of devices operably coupled to the audio network.
0. 20. The apparatus according to claim 6, wherein the digital-amplifier is configured for adjusting the digital gain parameter by the same amount as the value change of the analog gain parameter.
0. 22. The method according to claim 21, wherein the digital gain parameter is adjusted by the same amount as the value change of the analog gain parameter.
0. 23. The method according to claim 21, wherein the digital gain parameter is adjusted by an amount different from the value change of the analog gain parameter.
0. 24. The method according to claim 22 comprising:
performing, in accordance with a control signal from a remote device, the selecting of the first switch contact or the selecting of the second switch contact.
0. 25. The method according to claim 22, wherein the gain compensation is automatic.
0. 26. The method according to claim 22, wherein the adjusting of the digital gain parameter is performed after the analog gain parameter is adjusted by the value change.
0. 27. The method according to claim 22, wherein the method is performed in an IO device.
0. 28. The method according to claim 27, the IO device including the audio input port and another audio input port, the method comprising:
adjusting another digital gain parameter of the another audio input port inversely to another direction of another value change of another analog gain parameter of the another audio input port.
0. 29. The method according to claim 22, wherein the on/off state of the gain compensation is set into an ON state or an OFF state in accordance with a control signal from a remote device.
0. 30. The method according to claim 29, wherein the audio input port is configured for operably coupling to a plurality of channels,
wherein the on/off state of the gain compensation of the audio input port is common to all channels of the plurality of channels.
0. 31. The method according to claim 22, wherein the audio input port is operably coupled to a first receiver of a first mixing device for receiving a first input audio signal, the first input audio signal based on the adjusted digital gain parameter,
wherein the audio input port is operably coupled to a second receiver of a second mixing device for receiving a second input audio signal, the second input audio signal based on the adjusted digital gain parameter,
wherein, due to the adjusting of the digital gain parameter inversely to the direction of the value change of the analog gain parameter, respective levels of the first input audio signal and the second input audio signal do not have to be respectively adjusted at the first mixing device and at the second mixing device inversely to the direction of the value change of the analog gain parameter.
0. 32. The method according to claim 22, wherein the audio input port is operably coupled to a first receiver of a first mixing device for receiving a first input audio signal, the first input audio signal based on the adjusted digital gain parameter,
wherein the audio input port is operably coupled to a second receiver of a second mixing device for receiving a second input audio signal, the second input audio signal based on the adjusted digital gain parameter,
wherein, due to the adjusting of the digital gain parameter inversely to the direction of the value change in the analog gain parameter, respective levels of the first input audio signal and the second input audio signal do not change at the first mixing device and at the second mixing device.
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1. Technical Field of the Invention
The present invention relates to an audio system constructed by connecting a plurality of devices to an audio network.
2. Description of the Related Art
A mixing system, which is constructed by connecting a plurality of mixing devices in parallel to one input device to which an audio signal is input, is known in the art. The gain of the audio signal input to the input device is adjusted through an adjustment part and the adjusted audio signal is provided in parallel to all mixing devices connected to the input device. One mixing device receives the amount by which the gain has been adjusted by the adjustment part of the input device and corrects the level of the audio signal provided from the input device based on the received amount of adjustment so as to cancel the amount of adjustment of gain in the input device. Accordingly, even when gain adjustment, which is not necessarily optimal for each individual mixing device, has been performed in the input device, the gain adjustment is automatically canceled in the individual mixing device.
A digital mixer having an automatic gain compensation function is also known in the art. The level of an analog signal input to an analog input port in this digital mixer is adjusted through an amplifier whose analog gain is variable and the analog signal is then converted into a digital signal through an A/D converter. The digital signal from the input port is input to an input channel through an input patch and the level of the digital signal is adjusted through an attenuator whose digital gain is variable and acoustic characteristics thereof are then adjusted through an equalizer, a compressor, a fader, or the like. Then, if the user changes the analog gain of the input port in the case where automatic gain adjustment is set to “on”, the digital gain of the attenuator in the input channel of the digital mixer is changed to cancel the change of the analog gain so that the gain is automatically compensated.
A network-type audio system is also known in the art. This network-type audio system is constructed of an audio network including a plurality of devices connected in a loop such that loop transmission is possible between the devices. Partial operations of the mixing system such as an input operation, a mixing operation, and an output operation are assigned respectively to the devices of the network-type audio system such that the devices constitute the single audio system as a whole. In the audio network, an audio signal can be transmitted in real time and a control signal can also be transmitted through the same cable.
[Patent Reference 1] Japanese Patent No. 4052072
[Patent Reference 2] Japanese Patent Application Publication No. 2007-43249
[Patent Reference 3] Japanese Patent Application Publication No. 2007-295551
Here, it is assumed that the conventional network-type audio system includes an input device having input ports for performing input operations and a mixing device having input channels for performing mixing operations. If the user has changed the analog gain of the input port in the case where the conventional automatic gain compensation function is applied to such a network-type audio system, then the digital gain of the input channel of the mixing device is automatically changed so as to compensate the change of the analog gain. Meanwhile, when an instruction to adjust the analog gain has been issued from a console, the analog gain of the input device is adjusted according to the instruction and the digital gain of the mixing device is automatically adjusted. However, since an audio network is present between the devices, the instruction is not simultaneously received by both the input device and the mixing device, thereby causing a problem in that the timings to change gain at the two devices are different.
Therefore, it is an object of the invention to provide a network-type audio system which can perform automatic gain control without timing deviation.
To achieve the above object, an audio system of the invention comprises a control device and a plurality of devices being connected to an audio network, the plurality of devices including an input device and a mixing device, wherein the control device controls each of the plurality of devices directly or via the audio network according to manipulation performed by an operator, the control device including a setting part that sets automatic compensation of each of a plurality of input ports of the input device into either ON state or OFF state and an adjusting part that adjusts an analog gain of each of the plurality of input ports, wherein the input device includes the plurality of input ports and a sender, each input port including an amplifier that controls a level of an analog signal input to the input port based on the analog gain adjusted by the adjusting part, an AD converter that converts the analog signal from the amplifier into a digital signal, a compensator that controls a level of the digital signal from the AD converter based on a digital gain of the input port, and a selector that selects one of the digital signal from the AD converter and the digital signal from the compensator, and the sender sending the digital signals selected by the selectors of the plurality of input ports via the audio network, wherein the mixing device includes a receiver that receives the digital signals sent by the input device via the audio network, a plurality of input channels, each of which controls characteristics of each of the digital signals from the receiver, and a mix bus that mixes the digital signals from the plurality of input channels, and wherein, (a) when the automatic compensation of an input port of the input device is set into the ON state from the OFF state by the setting part of the control device, the digital gain of the input port is set to a predetermined value and the selector of the input port selects the digital signal from the compensator, (b) while the automatic compensation of an input port is in the ON state, the digital gain of the input port varies in accordance with the analog gain of the input port so that a value change in the analog gain of the input port by the adjusting part is compensated by a value change in the digital gain of the input channel, and, (c) when the automatic compensation of an input port of the input device is set into the OFF state from the ON state by the setting part, the selector of the input port of the input device selects the digital signal from the AD converter.
Preferably, the control device comprises a console connected to the audio network as one of the plurality of devices, the consol having a control panel which is provided thereon with a plurality of controls operable by an operator to control the audio system. Otherwise, the control device comprises a personal computer connected to one of the plurality of devices, the personal computer running thereon a control program for controlling the audio system.
In an expedient form, the audio system may be in combination with another audio system connected to the audio network, wherein said another audio system comprises another control device having the same construction as the control device of the audio system, and another mixing device having the same construction as the mixing device of the audio system, said another mixing device being controlled exclusively by said another control device, wherein the mixing device and the input device of the audio system are controlled exclusively by the control device of the audio system, wherein said another mixing device includes a receiver that receives the digital signals sent by the input device of the audio system via the audio network, a plurality of input channels, each of which controls characteristics of each of the digital signals from the receiver, and a mix bus that mixes the digital signals from the plurality of input channels, and wherein, while the automatic compensation of an input port o the input device of the audio system is in the ON state, the receiver of said another mixing device receives the digital signal having the level which is not changed by the analog gain of the input port adjusted by the adjusting part of the control device of the audio system.
Practically, the audio network is capable of transporting a plurality of audio signals and at least one control signal at the same time between the plurality of devices connected to the audio network.
According to the invention, since a change in the analog gain of the input port is compensated by the digital gain set in the compensator provided in the same input device, it is possible to achieve an automatic gain compensation function of a network-type audio system which can perform automatic gain compensation without timing deviation.
The audio system 1 shown in
When an analog audio signal is input to an input port of a device connected to the audio network 2, the audio signal input to the input port is received by the mixing engine 1-2 through the audio network 2. The mixing engine 1-2 mixes audio signals after adjusting level or frequency characteristics of the audio signals and outputs a (mixed) audio signal produced by mixing the audio signals to a device including an output port through the audio network 2. A device which has received the mixed signal emits the mixed signal through a speaker or the like after amplification. The operator can allocate an input port of each device to an input channel of the mixing engine 1-2 or can adjust acoustic characteristics of the input channel to a state, in which a played performance is heard optimally, by manipulating a variety of panel controls provided on the console 1-1. The operator can also set an on/off state of automatic compensation described later for each port. The audio system 1, which is a mixing system, is constructed of the audio network 2 to which devices such as the console 1-1, the mixing engine 1-2, and the IO devices IO1 to IO3 are connected in a ring as described above. The console 1-1 may function as a control device of another device and may be connected to any device instead of being connected to the ring-shaped audio network 2.
As shown in
Each output channel of the output channel portion 44 also includes an equalizer, a compressor, and the like for adjusting acoustic characteristics and performs frequency balancing or level adjustment and adjusts the sending level of an audio signal to the output patch 45. In the output patch 45, a desired input among a plurality of inputs from the plurality of output channels of the output channel portion 44 is selectively patched to each of a plurality of outputs of the output patch. The plurality of outputs are connected to a plurality of transmission ports, which send a plurality of audio signals to the channel ch-E of the audio network 2, and to a plurality of analog or digital output ports Ao(lo) 46 included in the AIO 23 of the mixing engine 1-2. That is, (output) audio signals from the patched channels are provided to the plurality of output ports Ao(lo) 46 and the plurality of transmission ports. The plurality of output ports Ao(lo) 46 provides the plurality of received (output) audio signals to an external audio device and the plurality of transmission ports sends the plurality of received (output) audio signals to the channel ch-E of the audio network 2.
In the console 1-1, the IO device IO1, and the IO device IO3, a plurality of (output) audio signals are received from the output channels of the mixing engine 1-2 through the audio network and are then input to patches Pcb, Pb1, and Pb3. In the patches Pcb, Pb1, and Pb3, a plurality of (output) audio signals produced through mixing of the output channels are selectively patched to a plurality of analog or digital output ports Ao(C), Ao(#1), and Ao(#3) and are then output from the plurality of output ports Ao(C), Ao(#1), and Ao(#3) to an external audio device.
On the console 1-1, the user can directly or remotely control patching of the patches Pca, Pa1, and Pa2 and the input patch 41 to set patching from desired input ports Ai(C), Ai(#1), and Ai(#2) of the input devices 1-1, 1-3, and 1-4 to desired input channels of the mixing engine 1-2, and can also directly or remotely control patching of the output patch 45 and the patches Pcb, Pb1, and Pb3 to set patching from desired output channels of the mixing engine 1-2 to desired output ports Ao(C), Ao(#1), and Ao(#3) of the output devices 1-1, 1-3, and 1-5 by manipulating the panel display or the panel controls on the console 1-1.
As shown in
The operation of the analog input port i will now be described with reference to
When on/off manipulation for automatic compensation of an analog input port i corresponding to an input port x of the device IO1 or IO2 has been performed on the panel of the console 1-1, the console 1-1 transmits a control signal indicating the on/off manipulation to the IO device IO1 or IO2. In the IO device IO1 or IO2, which has received the control signal, the on/off manipulation procedure of automatic compensation shown in
When it is determined that the flag ACS indicates an off state, the procedure proceeds to step S12 to switch the switch 33e of the analog input port i to the ADC 33b at the fixed contact b.
When the process of step S12 or S14 is terminated, the on/off manipulation procedure of automatic compensation is terminated. The console 1-1 performs the on/off manipulation procedure shown in
When a manipulation to change the analog gain (parameter) of the gain adjuster 33c of the analog input port i corresponding to the input port x of the IO device IO1 or IO2 has been performed on the console 1-1, the console 1-1 transmits a control signal indicating the change manipulation to the IO device IO1 or IO2. In the IO device IO1 or IO2, which has received the control signal, the analog gain change procedure shown in
On the other hand, when the flag ACS is off, the process of step S22 is not performed and the change of the analog gain by the operator is directly reflected in an (input) audio signal output from the analog input port i. Since on/off of automatic compensation (ACS flag) is set for each analog input port, a common ACS flag is used for a plurality of input channels when the same analog input port has been patched to the plurality of input channels. In addition, on/off of automatic compensation is common to all input channels connected to the same analog input port since on/off of automatic compensation is set for each analog input port. The analog gain change procedure shown in
Namely, according to the invention, (a) when the automatic compensation of an input port i of the input device (namely, IO1 or IO2) is set into the ON state from the OFF state by the setting part of the control device (namely, console 1-1), the digital gain of the input port i is set to a predetermined value and the selector 33e of the input port i selects the digital signal from the compensator 33d, (b) while the automatic compensation of an input port i is in the ON state, the digital gain of the input port i varies in accordance with the analog gain of the input port i so that a value change in the analog gain of the input port i by the adjusting part 33c is compensated by a value change in the digital gain of the input channel, and, (c) when the automatic compensation of an input port i of the input device is set into the OFF state from the ON state by the setting part, the selector 33e of the input port i of the input device selects the digital signal from the AD converter 33b.
As shown in
In addition, although not illustrated, a detailed configuration of the transmission path of an audio signal from input of the audio signal to the NIO 16 in the console 1-1 is the same as that of the IO device described above and operation thereof is also the same as that of the IO device described above.
A plurality of (input) digital audio signals acquired from the audio network 2 through the NIO 25 or a plurality of (input) digital audio signals input to the AIO 23 are directly input to the input patch 41. On the other hand, each of a plurality of (input) analog audio signals input to the AIO 23 is input to the input patch 41 after being converted into a digital (input) audio signal at the analog input port j shown in
The audio system 5 of
One of the nine devices connected to the audio network 6 is a master node. The master device regularly transmits a transmission frame to circulate through the audio network and also allocates a transmission channel to each of the nine devices. In this network, the subsystem Sa and the subsystem Sb can share (input) audio signals since an audio signal written to a transmission frame transmitted by one of the nine devices can be received by other devices. That is, the mixing engine Eb of the subsystem Sb can receive (input) audio signals that the IO devices IOa1, IOa2, IOa3, and IOa4 have transmitted to the audio network 6 and the mixing engine Ea of the subsystem Sa can receive (input) audio signals that the IO device IOb1 has transmitted to the audio network 6.
In the subsystem Sa, the console Ca serves as a control device of the subsystem Sa and remotely controls the mixing engine Ea and the IO devices IOa1, IOa2, IOa3, and IOa4. In the subsystem Sb, the console Cb serves as a control device of the subsystem Sb and remotely controls the mixing engine Eb and the IO device IOb1. The devices of the subsystem Sb cannot be remotely controlled by the console Ca since the devices are not under management by the subsystem Sa and the device of the subsystem Sa cannot be remotely controlled by the console Cb since the device is out of the range of management by the subsystem Sb.
Here, let us consider the case where the mixing engine Eb in the subsystem Sb extracts (input) audio signals, which the IO device IOa2 of the subsystem Sa has received through an analog input port i and has then transmitted to the audio network 6, and patches the extracted audio signals to one input channel k and then performs a mixing process on the audio signals. Here, the analog input port i is under control of the console Ca and the analog gain of the analog input port i is freely changed through panel manipulation by the operator of the subsystem Sa. In the conventional technology (which corresponds to when automatic compensation of the analog input port i of this embodiment is off), since the level of the (input) audio signal of the input channel k of the subsystem Sb changes, the operator of the subsystem Sb should readjust an attenuator parameter of the input channel k which has already been adjusted, thereby complicating the manipulation process. In the invention, by allowing the operator of the subsystem Sb to have the operator of the subsystem Sa turn on automatic compensation of the analog input port i which shares (input) audio signals, the level of an (input) audio signal input to the input channel k is not changed even when the analog gain of the analog input port i has changed and thus the operator of the subsystem Sb does not have to readjust the attenuator parameter.
As described above, audio system Sa is in combination with another audio system Sb connected to the audio network 6. The audio system Sb comprises another control device Cb having the same construction as the control device Ca of the audio system Sa, and another mixing device Eb having the same construction as the mixing device Ea of the audio system Sa, the mixing device Eb being controlled exclusively by the control device Cb. The mixing device Ea and the input device IOa of the audio system Sa are controlled exclusively by the control device Ca of the audio system Sa. The mixing device Eb includes a receiver that receives the digital signals sent by the input device IOa of the audio system Sa via the audio network 6, a plurality of input channels, each of which controls characteristics of each of the digital signals from the receiver, and a mix bus that mixes the digital signals from the plurality of input channels. While the automatic compensation of an input port o the input device IOa of the audio system Sa is in the ON state, the receiver of the mixing device Eb receives the digital signal having the level which is not changed by the analog gain of the input port adjusted by the adjusting part of the control device Ca of the audio system Sa.
In the audio device of the invention described above, if the analog gain of an input port, to which an analog audio signal is input, in an input device has been changed by a console, a digital gain set in a compensator of the input port compensates a change in the analog gain. The compensator adjusts the digital gain of a digital signal into which the input analog signal has been converted and outputs the resulting digital signal from the input port when the automatic gain compensation is on. Accordingly, it is possible to achieve an automatic gain compensation function of a network-type audio system which can perform automatic gain compensation without timing deviation or time lag.
In addition, although a plurality of devices are connected in a ring to the audio network 2, the plurality of devices may also be connected in a different form, for example, in a cascade. Further, although the consoles C, Ca, and Cb operate as control devices in the embodiments of the invention, the control devices are not limited to the consoles. For example, the console of
Patent | Priority | Assignee | Title |
9628038, | Mar 09 2012 | Yamaha Corporation | Audio signal processing system |
Patent | Priority | Assignee | Title |
5548592, | Apr 06 1993 | Creative Integrated Systems, Inc. | Home and small business phone system for operation on a single internal twisted pair line and methodology for operating the same |
20030123480, | |||
20070025568, | |||
20070142944, | |||
20070160237, | |||
20070230462, | |||
20140376748, | |||
EP1482664, | |||
EP1841137, | |||
EP1901488, | |||
JP2007043249, | |||
JP2007295551, | |||
JP4052072, |
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