CN216357277U - Network audio transmission equipment and audio system - Google Patents
Network audio transmission equipment and audio system Download PDFInfo
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- CN216357277U CN216357277U CN202122620508.XU CN202122620508U CN216357277U CN 216357277 U CN216357277 U CN 216357277U CN 202122620508 U CN202122620508 U CN 202122620508U CN 216357277 U CN216357277 U CN 216357277U
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Abstract
The utility model relates to a network audio transmission device and an audio system, comprising: the device comprises a device shell, a first network audio input interface, a second network audio input interface, a network connection interface, an analog audio output interface, a first network module, a second network module, a Dante Brooklyn II transmission module, a DSP processing module, a DAC analog audio output module, a control module, a first connector, a second connector and a third connector, wherein the device shell is provided with a first network audio input interface, a second network audio input interface, a network connection interface and an analog audio output interface; the first network module comprises a first audio data input pin and a second audio data input pin which are respectively connected with the first network audio input interface and the second network audio input interface, and the first connector is connected with the first network module and the Dante Brooklyn II transmission module; the second connector is connected with the first network module, the control module and the first connector; the DSP processing module is connected with the control module, the second connector and the DAC analog audio output module through a third connector, and the DAC analog audio output module is connected with the analog audio output interface; the second network module is connected with the control module and the network connection interface. The utility model can improve the reliability of the digital audio transmission process.
Description
Technical Field
The present invention relates to the field of network audio technologies, and in particular, to a network audio transmission device and an audio system.
Background
Currently, with the development of digital technology, more and more usage scenarios are digital audio. The digital audio technology greatly changes the life experience and listening habits of people. The traditional analog audio equipment needs to be built by means of too many devices in the audio processing process, has obvious defects of large volume and reliability, realizes high-quality processing of digital audio, and realizes transmission of the digital audio meeting various scenes, and all audio equipment manufacturers are knowledgeable and have more or less defects.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide a network audio transmission device and an audio system.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a network audio transmission device is constructed comprising: the device comprises a device shell, a first network audio input interface, a second network audio input interface, a network connection interface and an analog audio output interface which are arranged on the device shell, and a first network module, a second network module, a Dante Brooklyn II network audio transmission module, a DSP processing module, a DAC analog audio output module, a control module, a first connector, a second connector and a third connector which are arranged in the device shell;
the first network module comprises a first audio data input pin and a second audio data input pin, the first network audio input interface is connected with the first audio data input pin, and the second network audio input interface is connected with the second audio data input pin;
the first connector is used for connecting the first network module and the Dante Brooklyn II network audio transmission module; the second connector is used for connecting the first network module and the control module, and the second connector is connected with the first connector;
the DSP processing module is respectively connected with the control module and the second connector through the third connector, the DSP processing module is connected with the input end of the DAC analog audio output module through the third connector, and the output end of the DAC analog audio output module is connected with the analog audio output interface;
the second network module is connected with the control module and the network connection interface, wherein the network connection interface is used for being in communication connection with an upper computer.
Preferably, in the network audio transmission device of the present invention, the first network module includes a first network chip U40;
the first audio data input pin comprises a seventh pin, an eighth pin, a tenth pin, an eleventh pin, a thirteenth pin, a fourteenth pin, a fifteenth pin and a sixteenth pin of the first network chip U40;
the second audio data input pins include a seventeenth pin, an eighteenth pin, a twentieth pin, a twenty-first pin, a twenty-third pin, a twenty-fourteenth pin, a twenty-fifth pin, and a twenty-sixth pin of the first network chip U40.
Preferably, in the network audio transmission device of the present invention, the control module includes a control chip U14, the second connector includes a pluggable-connected link J3 and a link J1, and the third connector includes a pluggable-connected link X1 and a link X1P;
the control chip U14 is connected with the second network module, the connecting end J3 is connected with the first network module and the first connector, the connecting end J1 is connected with the connecting end X1 is connected with the control chip U14, the connecting end X1 is connected with the connecting end J1 and the DAC simulation audio output module, and the connecting end X1P is connected with the DSP processing module.
Preferably, in the network audio transmission device of the present invention, the DSP processing module includes a DSP chip U2;
the connecting end X1P is used for connecting the DSP chip U2.
Preferably, in the network audio transmission device of the present invention, the DAC analog audio output module includes at least one DAC chip, and the analog audio output interface includes a plurality of analog audio connectors;
the first pin, the thirty-sixth pin, the thirty-eighth pin and the forty-seventh pin of each DAC chip are correspondingly connected with the second pin of the analog audio connector respectively;
the second pin, the thirty-fifth pin, the thirty-ninth pin and the forty-sixth pin of each DAC chip are correspondingly connected with the third pin of the analog audio connector respectively;
the at least one DAC chip U3 is respectively connected with the connecting end X1;
the first pin and the fourth pin of each analog audio connector are grounded.
Preferably, in the network audio transmission device of the present invention, the at least one DAC chip includes three DAC chips, and the plurality of analog audio connectors includes 12 analog audio connectors.
Preferably, in the network audio transmission device of the present invention, the second network module includes a second network chip U17, wherein the device model number of the second network chip U17 is DP83848 IVV.
Preferably, in the network audio transmission device of the present invention, the network connection interface includes a connector J17, the first pin of the connector J17 is connected to the fourteenth pin of the second network chip U17, the second pin of the connector J17 is connected to the thirteenth pin of the second network chip U17, the third pin of the connector J17 is connected to the seventeenth pin of the second network chip U17, the sixth pin of the connector J17 is connected to the sixteenth pin of the second network chip U17, the fourth, fifth, ninth and twelfth pins of the connector J17 are used for connecting an input voltage, the tenth pin of the connector J17 is connected to the twenty-eighth pin of the second network chip U17, and the eleventh pin of the connector J17 is connected to the twenty-sixth pin of the second network chip U17.
Preferably, in the network audio transmission device of the present invention, the first network audio input interface, the second network audio input interface, the first connector and the connection terminal J3 are all disposed on a first PCB; and/or
The DSP processing module and the connecting end X1P are both arranged on a second PCB; and/or
The DAC analog audio output module, the analog audio output interface, the control module, the connecting end J1 and the connecting end X1 are all arranged on a third PCB.
In addition, the present invention also constructs an audio system including: first network audio input equipment, second network audio input equipment, speaker and host computer, and above-mentioned arbitrary one network audio transmission equipment, wherein, first network audio input equipment with first network audio input interface communication connection, second network audio input equipment with second network audio input interface communication connection, the speaker with analog audio output interface connection, the host computer with network connection interface communication connection.
The network audio transmission equipment, namely the audio equipment, has the following beneficial effects: the reliability of the digital audio transmission process can be improved.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic structural diagram of a network audio transmission device according to an embodiment of the present invention;
fig. 2 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 3 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 4 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 5 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 6 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 7 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 8 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 9 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 10 is a circuit schematic of a first embodiment of a network audio transmission device of the present invention;
fig. 11 is a circuit schematic diagram of a first embodiment of a network audio transmission device of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of a network audio transmission device of the present invention, the network audio transmission device includes: the device comprises a device shell, a first network audio input interface 111, a second network audio input interface 112, a network connection interface 330 and an analog audio output interface 360 which are arranged on the device shell, and a first network module 120, a second network module 320, a Dante Brooklyn II network audio transmission module 200, a DSP processing module 400, a DAC analog audio output module 350, a control module 310, a first connector 131, a second connector 132 and a third connector 133 which are arranged inside the device shell; the first network module 120 comprises a first audio data input pin and a second audio data input pin, the first network audio input interface 111 is connected with the first audio data input pin, and the second network audio input interface 112 is connected with the second audio data input pin; the first connector 131 is used to connect the first network module 120 with the Dante Brooklyn II network audio transmission module 200; the second connector 132 is used for connecting the first network module 120 and the control module 310; the second connector 132 is connected to the first connector 131, the DSP processing module 400 is connected to the control module 310 and the second connector 132 through the third connector 133, respectively, the DSP processing module 400 is connected to the input end of the DAC analog audio output module 350 through the third connector 133, and the output end of the DAC analog audio output module 350 is connected to the analog audio output interface 360; the second network module 320 is connected to the control module 310 and the network connection interface 330, wherein the network connection interface 330 is used for being connected to the upper computer in a communication manner. Specifically, the network audio transmission device receives digital audio data input through a network through a first network audio input interface 111 and a second network audio input interface 112 disposed on the device housing. The digital audio data is processed by the first network module 120 and then input to the Dante Brooklyn II network audio transmission module 200 through the first connector 131, the digital audio data is processed by the Dante Brooklyn II network audio transmission module 200, the processed data is sequentially input to the DSP processing module 400 through the first connector 131, the second connector 132 and the third connector 133, the processed data obtained by the processing of the DSP processing module 400 is input to the DAC analog audio output module 350 through the third connector 133 to be subjected to digital-to-analog conversion to obtain analog audio data, and the analog audio data is input to the lower-level device through the analog audio output interface 360. For example, the data is input to an audio device such as a speaker. Wherein the dashed lines correspond to audio signal links, as in fig. 1. Meanwhile, the network connection interface 330 is connected to the control module 310 through the second network module 320, and inputs a control process of the corresponding control instruction audio device through an upper computer connected to the network connection interface 330. The control process can refer to the currently existing audio control process. The control module 310 may input a control command to the DSP processing module 400 or receive an operation parameter from the DSP processing module 400 through the third connection 133. Control module 310 may also input control commands to Dante Brooklyn II network audio transport module 200 via second connector 132, first network module 120, and first connector 131, and receive operating parameters from Dante Brooklyn II network audio transport module 200.
Optionally, as shown in fig. 2, the first network module 120 includes a first network chip U40; the first audio data input pin includes a seventh pin, an eighth pin, a tenth pin, an eleventh pin, a thirteenth pin, a fourteenth pin, a fifteenth pin, and a sixteenth pin of the first network chip U40; the second audio data input pins include a seventeenth pin, an eighteenth pin, a twentieth pin, a twenty-first pin, a twenty-third pin, a twenty-fourteenth pin, a twenty-fifth pin, and a twenty-sixth pin of the first network chip U40. Specifically, two network audio data inputs inputted by the two network audio input interfaces are inputted into the network chip U40 through the pin connection relationship.
As shown in fig. 3 to 9, the control module includes a control chip U14, the second connector 132 includes a pluggable-connected link J3 and a link J1, and the third connector 133 includes a pluggable-connected link X1 and a link X1P; the control chip U14 is connected to the second network module 320, the connection terminal J3 is connected to the first network module 120 and the first connector 131, the connection terminal J1 and the connection terminal X1 are respectively connected to the control chip U14, the connection terminal X1 is further connected to the connection terminal J1 and the DAC analog audio output module 350, and the connection terminal X1P is connected to the DSP processing module 400. Specifically, the first connector 131 includes a connector J6 for connecting the Dante Brooklyn II network audio transmission module 200, the connection J3 and the connection J1 of the second connector 132 are pluggable connections, and the connector J6 receives LRCLK, MCLK, SCLK, SDOUT0, SDOUT1 SDOUT2 and SDOUT0 from the Dante Brooklyn II network audio transmission module 200 and inputs the signals to the odd-numbered pins of the connection X1 and the 29 th to 49 th pins of the connection X1P through the pins a10 to a16 of the connection J3 and the connector J1 to input the signals to the DSP processing module 400 for processing the digital audio through the DSP processing module 400. The even-numbered pins among the 36 th pin to the 50 th pin of the connection terminal X1 and the connection terminal X1P receive the audio output signal of the DSP processing block 400 and input the audio output signal to the DAC analog audio output block 350. It is understood that the digital audio signal is transmitted between the Dante Brooklyn II network audio transmission module 200, the DSP processing module 400 and the DAC analog audio output module 350 through the connectors to form a connection loop and using the TDM bus mode transmission mode. The control chip U14 is used to receive the communication signals, such as UART signals, output by the Dante Brooklyn II network audio transmission module 200 through the connector J6 via pins a2 and B2 of the connector J1, and the communication between the control chip U14 and the Dante Brooklyn II network audio transmission module 200 is realized via the communication signals. The control chip U14 is further configured to receive SPI control signals output by the Dante Brooklyn II network audio transmission module 200 through the connector J6 via pins A3 to a7 of the connection terminal J1 and the connection terminal J3, and input the SPI control signals to the DSP processing module 400 via the connection terminal X1 and the connection terminal X1P, so as to implement control signal communication between the Dante Brooklyn II network audio transmission module 200 and the DSP processing module 400. The control signal is in data communication with the full-duplex SPI interface of the DSP processing module 400 via the control module 310. In addition, the control chip U14 is also connected to the second network module 320 via MII signal to realize communication with the second network module 320. In one embodiment, the control chip U14 includes an STM32 series chip.
Specifically, in the working process of the device, the Dante Brooklyn II network audio transmission module 200 may receive audio data from the main and standby devices from 2 mutually redundant networks, transmit the audio data to the DSP processing module 400 through the TDM bus, and determine whether to switch the main audio data or the backup audio data to be transmitted to the DAC analog audio output module 350 and converted into analog audio output according to the determination rule of the signal abnormality after the detection and analysis by the DSP processing module 400. The control module 310 stores the operating parameters of the DSP processing module 400, monitors the operating state of the Dante Brooklyn II network audio transmission module 200, receives an external control command, sends the operating parameters to the DSP processing module 400, obtains audio level data and the operating state from the DSP processing module 400, and simultaneously forwards information such as the audio signal levels of a plurality of channels and the switching state of the device to an external control center. The PC can acquire the running state of the Dante Brooklyn II network audio transmission module 200 and the state of the DSP processing module 400 through communication with the control module 310, and can also transmit the operation parameters of the DSP processing module 400 algorithm to the control module 310 processing module, and then the control module 310 transmits the operation parameters to the DSP processing module 400 through SPI communication.
Optionally, as shown in fig. 8, the DSP processing module 400 includes a DSP chip U2, and the connection terminal X1P is connected to the DSP chip U2. Specifically, in the DSP processing module 400, the DSP chip U2 receives the audio data from the Dante Brooklyn II network audio transmission module 200 through the connection terminal X1P, and outputs the audio data to the DAC analog audio output module 350 through the connection terminal X1P and the connection terminal X1 after being processed by the DSP chip U2, and the DSP chip U2 also receives the SPI signal from the Dante Brooklyn II network audio transmission module 200 through the connection terminal X1P and the connection terminal X1, so as to control the working process of the DSP chip U2. The DSP chip U2 can adopt ADI SHARC21489 series chips, the high-performance DSP chip (digital signal processor) collects data of the input main and standby audio signals, after the data are collected to a certain number of frames, the DSP chip starts to respectively calculate RMS (root mean square) values of the main and standby channel signals to carry out numerical calculation analysis, and different numbers of audio sample values are selected according to the set detection time length when the RMS values are calculated so as to adapt to different audio signal patterns; and finally, comparing the channel abnormal conditions of the two groups of input sound sources, and outputting the digital audio signals of the main sound source group or the backup sound source group according to the set switching rule. Meanwhile, the audio channel switching of the DSP chip can be controlled through the control module 310 according to the SPI signal, and remote control switching can be achieved through the upper computer and the control module 310.
As shown in fig. 9, the DAC analog audio output module 350 includes at least one DAC chip, and the analog audio output interface 360 includes a plurality of analog audio connectors; the first pin, the thirty-sixth pin, the thirty-eighth pin and the forty-seventh pin of each DAC chip are correspondingly connected with the second pin of an analog audio connector respectively; the second pin, the thirty-fifth pin, the thirty-ninth pin and the forty-sixth pin of each DAC chip are correspondingly connected with the third pin of an analog audio connector respectively; the DAC chips U3 are respectively connected with the connectors X1; the first pin and the fourth pin of each analog audio connector are both grounded. Specifically, in the DAC analog audio output module 350, digital-to-analog conversion is performed through one or more DAC chips to obtain an analog audio output, and the analog audio is output through an analog audio connector. The PCM4104 family of TI can be used for DAC chips, where each DAC chip corresponds to 4 sets of analog audio output signals. As shown in fig. 10, in one embodiment, to realize 12 analog audio outputs, three DAC chips are used, and 12 analog audio connectors correspond to the 12 analog audio outputs. In actual use, the 12 analog audio outputs may not be used simultaneously.
Optionally, as shown in fig. 11, the second network module 320 includes a second network chip U17, wherein the device model of the second network chip U17 is DP83848 IVV. Specifically, the control module 310 may be connected to the network connection interface 330 through the network chip DP83848IVV to communicate with the upper computer through ethernet.
Optionally, the network connection interface 330 includes a connector J17, a first pin of the connector J17 is connected to a fourteenth pin of the second network chip U17, a second pin of the connector J17 is connected to a thirteenth pin of the second network chip U17, a third pin of the connector J17 is connected to a seventeenth pin of the second network chip U17, a sixth pin of the connector J17 is connected to a sixteenth pin of the second network chip U17, a ground fourth pin, a fifth pin, a ninth pin and a twelfth pin of the connector J17 are used for connecting an input voltage, a tenth pin of the connector J17 is connected to a twenty-eighth pin of the second network chip U17, and an eleventh pin of the connector J17 is connected to a twenty-sixth pin of the second network chip U17.
Optionally, the first network audio input interface 111, the second network audio input interface 112, the first connector 131, and the connection terminal J3 are all disposed on the first PCB; and/or the DSP processing module 400 and the connection end X1P are arranged on the second PCB; and/or the DAC analog audio output module 350, the control module 310, the analog audio output interface 360, the connection terminal J1 and the connection terminal X1 are arranged on the third PCB. Specifically, the internal circuit of the device may be composed of a plurality of PCBs disposed independently, wherein the first network audio input interface 111, the second network audio input interface 112, the first connector 131, and the connection end J3 are disposed on a first PCB board, and the first PCB board may also be understood as an adapter board of the Dante Brooklyn II network audio transmission module 200, through which the Dante Brooklyn II network audio transmission module 200 performs data transmission with the internal circuit. The DSP processing module 400 and the connection terminal X1P also use a separate PCB design, and are connected to the connection terminal X1 through the connection terminal X1P, so as to be connected to the adapter board of the Dante Brooklyn II network audio transmission module 200 through the connection terminal X, i.e. it can be understood that data transmission between the Dante Brooklyn II network audio transmission module 200 and the DSP processing module 400 needs to be transferred through the adapter board. The control module 310, the DAC analog audio output module 350 and the analog audio output interface 360 belong to the same PCB, and the PCB is provided with a connection terminal J1 for connecting with the connection terminal J3 of the first PCB and forming a connection with the first PCB, and a connection terminal X1 for connecting with the connection terminal X1P of the second PCB and forming a connection with the circuit of the second PCB.
In addition, the audio system of the present invention includes a first network audio input device, a second network audio input device, a speaker, an upper computer, and a network audio transmission device as any one of the above devices, wherein the first network audio input device is in communication connection with the first network audio input interface 111, the second network audio input device is in communication connection with the second network audio input interface 112, the speaker is connected to the analog audio output interface 360, and the upper computer is in communication connection with the network connection interface 330. Specifically, the first network audio input device and the second network audio input device are respectively connected with the network audio input interface in the network audio transmission device through the network node. The network audio of the network audio input device is processed by the network audio transmission device and then output to the loudspeaker through the analog audio output interface 360, and finally the audio output is realized.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the utility model, are given by way of illustration and description, and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A network audio transmission device, comprising: the device comprises a device shell, a first network audio input interface, a second network audio input interface, a network connection interface and an analog audio output interface which are arranged on the device shell, and a first network module, a second network module, a Dante Brooklyn II network audio transmission module, a DSP processing module, a DAC analog audio output module, a control module, a first connector, a second connector and a third connector which are arranged in the device shell;
the first network module comprises a first audio data input pin and a second audio data input pin, the first network audio input interface is connected with the first audio data input pin, and the second network audio input interface is connected with the second audio data input pin;
the first connector is used for connecting the first network module and the Dante Brooklyn II network audio transmission module; the second connector is used for connecting the first network module and the control module, and the second connector is connected with the first connector;
the DSP processing module is respectively connected with the control module and the second connector through the third connector, the DSP processing module is connected with the input end of the DAC analog audio output module through the third connector, and the output end of the DAC analog audio output module is connected with the analog audio output interface;
the second network module is connected with the control module and the network connection interface, wherein the network connection interface is used for being in communication connection with an upper computer.
2. The network audio transmission device of claim 1, wherein the first network module comprises a first network chip U40;
the first audio data input pin comprises a seventh pin, an eighth pin, a tenth pin, an eleventh pin, a thirteenth pin, a fourteenth pin, a fifteenth pin and a sixteenth pin of the first network chip U40;
the second audio data input pins include a seventeenth pin, an eighteenth pin, a twentieth pin, a twenty-first pin, a twenty-third pin, a twenty-fourteenth pin, a twenty-fifth pin, and a twenty-sixth pin of the first network chip U40.
3. The network audio transmission device of claim 1, wherein the control module includes a control chip U14, the second connector includes a pluggable connected link J3 and a link J1, the third connector includes a pluggable connected link X1 and a link X1P;
the control chip U14 is connected with the second network module, the connecting end J3 is connected with the first network module and the first connector, the connecting end J1 is connected with the connecting end X1 is connected with the control chip U14, the connecting end X1 is connected with the connecting end J1 and the DAC simulation audio output module, and the connecting end X1P is connected with the DSP processing module.
4. The network audio transmission device of claim 3, wherein the DSP processing module comprises a DSP chip U2;
the connecting end X1P is used for connecting the DSP chip U2.
5. The network audio transmission device of claim 3, wherein the DAC analog audio output module comprises at least one DAC chip, and the analog audio output interface comprises a plurality of analog audio connectors;
the first pin, the thirty-sixth pin, the thirty-eighth pin and the forty-seventh pin of each DAC chip are correspondingly connected with the second pin of the analog audio connector respectively;
the second pin, the thirty-fifth pin, the thirty-ninth pin and the forty-sixth pin of each DAC chip are correspondingly connected with the third pin of the analog audio connector respectively;
the at least one DAC chip U3 is respectively connected with the connecting end X1;
the first pin and the fourth pin of each analog audio connector are grounded.
6. The network audio transmission device of claim 5, wherein the at least one DAC chip comprises three DAC chips, and wherein the plurality of analog audio connectors comprises 12 analog audio connectors.
7. The network audio transmission device of claim 3, wherein the second network module comprises a second network chip U17, wherein the device model number of the second network chip U17 is DP83848 IVV.
8. The network audio transmission device of claim 7, wherein the network connection interface comprises a connector J17, the first pin of the connector J17 is connected to the fourteenth pin of the second network chip U17, the second pin of the connector J17 is connected to the thirteenth pin of the second network chip U17, the third pin of the connector J17 is connected to the seventeenth pin of the second network chip U17, the sixth pin of the connector J17 is connected to the sixteenth pin of the second network chip U17, the fourth pin, the fifth pin, the ninth pin and the twelfth pin of the connector J17 are used for connecting an input voltage, the tenth pin of the connector J17 is connected to the twenty-eighth pin of the second network chip U17, the eleventh pin of the connector J17 is connected to the twenty-sixth pin of the second network chip U17.
9. The network audio transmission device according to claim 3, wherein the first network audio input interface, the second network audio input interface, the first connector and the connection terminal J3 are all disposed on a first PCB board; and/or
The DSP processing module and the connecting end X1P are both arranged on a second PCB; and/or
The DAC analog audio output module, the analog audio output interface, the control module, the connecting end J1 and the connecting end X1 are all arranged on a third PCB.
10. An audio system, comprising: first network audio input device, second network audio input device, speaker and host computer and the network audio transmission device of any one of claims 1 to 9, wherein the first network audio input device is in communication connection with the first network audio input interface, the second network audio input device is in communication connection with the second network audio input interface, the speaker is in connection with the analog audio output interface, and the host computer is in communication connection with the network connection interface.
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| CN202122620508.XU CN216357277U (en) | 2021-10-29 | 2021-10-29 | Network audio transmission equipment and audio system |
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| CN202122620508.XU CN216357277U (en) | 2021-10-29 | 2021-10-29 | Network audio transmission equipment and audio system |
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