Intelligent sound mixer

Abstract

The utility model discloses an intelligent sound mixer, particularly relates to the technical field of sound mixers, and is technically characterized in that the sound mixer comprises an input module, an output module, a digital signal processing module, a control module, a network module and a phantom power supply module, the output module comprises at least one output unit, the at least one input unit and the at least one output module are connected with the digital signal processing module, the digital signal processing module is connected with the control module, one end of the phantom power supply module is connected with the control module, and the other end of the phantom power supply module is connected with the control module. The power supply end of at least one input unit is connected with the other end of the phantom power supply module, the network module is connected with the control module, the control module is further connected with a digital potentiometer, and the control end of at least one input unit is connected with the output end of the digital potentiometer.

Description

Technical Field

[0001] The utility model relates to the technical field of mixers, in particular to an intelligent mixer. Background Art

[0002] A mixer is a device that mixes and processes audio signals. Processing includes gain adjustment, noise threshold, delay adjustment, phase adjustment, frequency division, and equalization. Currently, mixers on the market are mainly divided into two types: hardware mixers and software mixers. Software mixers have more flexible parameter settings and can adjust multiple signals individually, making them more convenient for processing digital audio. However, for analog audio, an acquisition card is required, and the output is a digital audio file. Hardware mixers, on the other hand, mainly combine multiple audio channels into one output, offering fast data processing speeds and better preservation of audio details. However, specific audio parameters cannot be customized. At the same time, whether it is a software mixer or a hardware mixer, specialized equipment is required to process the microphone signal individually before mixing.

[0003] Therefore, the present invention aims to provide an intelligent mixer to solve the above-mentioned related problems. Utility Model Content

[0004] The technical problem to be solved by the present invention is that existing software mixers need to be configured with an acquisition card, and hardware mixers cannot perform custom adjustments to specific audio parameters. The purpose is to provide an intelligent mixer, which connects a digital potentiometer to a pre-stage processing circuit in an input unit to change the resistance value in the pre-stage processing circuit to achieve hardware-level gain adjustment; a control module outputs a control signal to a digital signal processing module to control the digital signal processing module to achieve software gain adjustment, threshold, noise limitation, delay, mixing and other operations, thereby solving the problem that existing software mixers need to be configured with an acquisition card, and hardware mixers cannot perform custom adjustments to specific audio parameters.

[0005] The utility model is achieved through the following technical solutions:

[0006] An intelligent mixer includes an input module, an output module, a digital signal processing module, a control module, a network module, and a phantom power supply module. The input module includes at least one input unit, the output module includes at least one output unit, at least one input unit and at least one output module are both connected to the digital signal processing module, the digital signal processing module is connected to the control module, one end of the phantom power supply module is connected to the control module, the power supply end of at least one input unit is connected to the other end of the phantom power supply module, the network module is connected to the control module, the control module is further connected to a digital potentiometer, and the control end of at least one input unit is connected to the output end of the digital potentiometer.

[0007] Furthermore, the audio mixer further comprises a memory, an encoding potentiometer and a display device, and the memory, the encoding potentiometer and the display device are all connected to the control module.

[0008] Furthermore, the input unit includes an analog-to-digital converter, two input terminals and two pre-stage processing circuits, the output ends of the two input terminals are respectively connected to the input ends of the two pre-stage processing circuits, the output ends of the two pre-stage processing circuits are both connected to the input ends of the digital-to-analog converter, and the output end of the digital-to-analog converter is connected to the digital signal processing module.

[0009] Furthermore, the output unit includes a digital-to-analog converter, two operational amplifiers, two filters and two output terminals, the input end of the digital-to-analog converter is connected to the digital signal processing module, the output end of the digital-to-analog converter is respectively connected to the input ends of the two operational amplifiers, the output ends of the two operational amplifiers are respectively connected to the input ends of the two filters, and the output ends of the two filters are respectively connected to the two output terminals.

[0010] Furthermore, the network module includes at least one communication chip and at least one communication interface, the communication chip and the communication interface correspond one to one, and at least one of the communication interfaces is connected to the control module through the corresponding communication chip.

[0011] Furthermore, registers are provided between the control module and the digital potentiometer and the phantom power module respectively.

[0012] Furthermore, at least one of the input units adopts one of the first input channel or the second input channel, the two input terminals in the first input channel adopt Phoenix input terminals, and the two input terminals in the second input channel adopt Lotus input terminals; the phantom power supply module is respectively connected to the power supply ends of the two input terminals of the first input channel, and the output ends of the digital potentiometer are respectively connected to the control ends of the two pre-stage processing circuits of the first input channel.

[0013] Furthermore, at least one of the output units adopts one of the first output channel or the second output channel, the two output terminals in the first output channel adopt Phoenix output terminals, any one of the two operational amplifiers in the first output channel is connected to a cascade input terminal, and the two output terminals in the second output channel adopt Lotus output terminals.

[0014] Furthermore, the communication chip includes an RS232 chip, an RS485 chip and a PHY chip.

[0015] Furthermore, the communication interface includes a DB9 interface, a 4P Phoenix interface and an RJ45 interface.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. In the present invention, a digital potentiometer is connected to the pre-stage processing circuit in the input unit to change the resistance value in the pre-stage processing circuit, thereby achieving hardware-level gain adjustment. A control module outputs a control signal to the digital signal processing module to control the digital signal processing module to implement software gain adjustment, threshold, noise limitation, delay, mixing and other operations, thereby solving the problems that existing software mixers require an acquisition card and hardware mixers cannot customize specific audio parameters.

[0018] 2. In the present invention, the power supply end of at least one input unit is connected to the phantom power module, thereby realizing independent power control of each input unit, eliminating the need to configure a separate device for microphone mixing; at the same time, the network module facilitates the connection of the mixer with external devices or a host computer, thereby realizing remote control and network audio mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of module connections of an intelligent mixer in this embodiment;

[0021] Figure 2 This is a schematic diagram of the structural connection of an intelligent mixer in this embodiment;

[0022] Figure 3 This is a schematic diagram of the structural connection of an input module in an intelligent mixer in this embodiment;

[0023] Figure 4 This is a schematic diagram of the structural connection of an output module in an intelligent mixer in this embodiment;

[0024] Figure 5 This is a schematic diagram of the structural connection of a network module in an intelligent mixer in this embodiment;

[0025] Figure 6 Schematic diagram of a pre-processing circuit of a network module in an intelligent mixer according to this embodiment.

[0026] Markings and corresponding parts names in the accompanying drawings:

[0027] 1. Input module; 10. Input unit; 101. Analog-to-digital converter; 102. Input terminal; 103. Pre-processing circuit; 100. First input channel; 110. Second input channel; 2. Output module; 20. Output unit; 201. Digital-to-analog converter; 202. Operational amplifier; 203. Filter; 204. Output terminal; 200. First output channel; 210. Second output channel; 3. Digital signal processing module; 4. Control module; 5. Network module; 50. Communication chip; 501. RS232 chip; 502. RS485 chip; 503. PHY chip; 51. Communication interface; 511. DB9 interface; 512. 4P Phoenix interface; 513. RJ45 interface; 6. Phantom power module; 7. Digital potentiometer; 8. Memory; 9. Encoding potentiometer; 11. Register; 12. Cascade input terminal; 13. Display device. DETAILED DESCRIPTION

[0028] The following description of exemplary embodiments of the present disclosure is made in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be appreciated by those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0029] In this disclosure, unless otherwise specified, the use of terms such as "first" and "second" to describe various elements is not intended to limit the positional relationship, temporal relationship, or importance relationship of these elements. Such terms are only used to distinguish one element from another. In some examples, the first element and the second element may refer to the same instance of the element, while in some cases, based on the context of the description, they may also refer to different instances.

[0030] The terms used in the descriptions of various examples in this disclosure are for the purpose of describing specific examples only and are not intended to be limiting. Unless the context clearly indicates otherwise, if the number of elements is not specifically limited, the element may be one or more. In addition, the term "and / or" used in this disclosure encompasses any one and all possible combinations of the listed items.

[0031] Example

[0032] See also Figure 1-5 As shown, this embodiment provides an intelligent mixer, which includes an input module 1, an output module 2, a digital signal processing module 3 (DSP module), a control module 4, a network module 5 and a phantom power module 6. The input module 1 includes at least one input unit 10, the output module 2 includes at least one output unit 20, at least one input unit 10 and at least one output module 2 are both connected to the digital signal processing module 3, the digital signal processing module 3 is connected to the control module 4, one end of the phantom power module 6 is connected to the control module 4, the power supply end of at least one input unit 10 is connected to the other end of the phantom power module 6, the network module 5 is connected to the control module 4, the control module 4 is further connected to a digital potentiometer 7, and the control end of at least one input unit 10 is connected to the output end of the digital potentiometer 7.

[0033] It should be noted that, in this embodiment, the digital signal processing module 3 adopts the ADSP21489 processor; the control module 4 adopts the AT32F407VGT7 chip; the digital potentiometer 7 adopts the TPL0501-100DCNR digital potentiometer; at the same time, the number of the input units 10 is seven, and in other embodiments, it can also be five, six, eight or ten, and there is no excessive restriction here; at the same time, in this embodiment, the number of the output units 20 is three, and in other embodiments, it can also be two, four or five, and there is no excessive restriction here; at the same time, in this embodiment, the phantom power module Block 6 uses a 48V phantom power module of model LM3487 to provide power support for an external microphone device connected to the input unit 10. In other embodiments, other devices capable of power support may also be used, and no further restrictions are made here. At the same time, the present invention also includes a power supply device, which uses a switching power supply to respectively power the input module 1, output module 2, digital signal processing module 3, control module 4, network module 5 and phantom power module 6 in the mixer. This technical content is a conventional technical means in this field, and those skilled in the art are aware of this technical content and will not be elaborated on here.

[0034] Specifically, in this embodiment, the digital potentiometer 7 is connected to the pre-stage processing circuit 103 in the input unit 10 to change the sensitivity in the pre-stage processing circuit 103 to achieve hardware-level gain adjustment; the control module 4 outputs a control signal to the digital signal processing module 3 to control the digital signal processing module 3 to implement software gain adjustment, threshold, noise limitation, delay, mixing and other operations, thereby solving the problem that the existing software mixer needs to be configured with an acquisition card and the hardware mixer cannot customize the specific audio parameters.

[0035] Furthermore, the audio mixer further includes a memory 8 , an encoding potentiometer 9 and a display device 13 , and the memory 8 , the encoding potentiometer 9 and the display device 13 are all connected to the control module 4 .

[0036] It should be noted that, in this embodiment, the memory 8 adopts a W25Q128 memory; the encoding potentiometer 9 adopts an EC11 encoding potentiometer; the memory 8 adopts an electrically erasable programmable read-only memory 8, and in other embodiments, a random access memory 8, a read-only memory 8 or a storage medium capable of storing data may also be adopted, without making too many restrictions here; at the same time, in this embodiment, the encoding potentiometer 9 adopts a key-operated encoding potentiometer 9, and in other embodiments, other mechanical encoding potentiometers 9 may also be adopted, without making too many restrictions here; at the same time, in this embodiment, the display device 13 adopts an LED display screen, and in other embodiments, other devices capable of displaying data may also be adopted, without making too many restrictions here.

[0037] Specifically, in this embodiment, the memory 8 facilitates data storage; the encoding potentiometer 9 is used for the user to control the mixer to adjust the signal input; and the display device 13 facilitates real-time display of the device status and control information data of the mixer.

[0038] Furthermore, the input unit 10 includes an analog-to-digital converter 101, two input terminals 102 and two pre-stage processing circuits 103, the output ends of the two input terminals 102 are respectively connected to the input ends of the two pre-stage processing circuits 103, the output ends of the two pre-stage processing circuits 103 are both connected to the input ends of the digital-to-analog converter 201, and the output end of the digital-to-analog converter 201 is connected to the digital signal processing module 3.

[0039] It should be noted that, in this embodiment, the analog-to-digital converter 101 adopts a PCM4202 analog-to-digital converter; and the circuit diagram of the pre-stage processing circuit 103 is shown in FIG. Figure 6 through the digital potentiometer 7 to control the sensitivity of the pre-stage processing circuit 103, and then through the pre-stage processing circuit 103 in the back of the two operational amplifiers to control the amplification of the input signal, so that the input signal meets the input requirements of the analog-to-digital converter 101.

[0040] Specifically, in this embodiment, the input terminal 102 is used to connect to an external audio signal input device; the pre-stage processing circuit 103 facilitates gain adjustment, pressure limiting processing and differential adjustment of the audio signal; the analog-to-digital converter 101 facilitates converting the processed analog differential signal into an IIS digital signal and transmitting it to the digital signal processing module 3.

[0041] Furthermore, the output unit 20 includes a digital-to-analog converter 201, two operational amplifiers 202, two filters 203 and two output terminals 204. The input end of the digital-to-analog converter 201 is connected to the digital signal processing module 3, the output end of the digital-to-analog converter 201 is respectively connected to the input ends of the two operational amplifiers 202, the output ends of the two operational amplifiers 202 are respectively connected to the input ends of the two filters 203, and the output ends of the two filters 203 are respectively connected to the two output terminals 204.

[0042] It should be noted that, in this embodiment, the digital-to-analog converter 201 adopts a PCM1798 digital-to-analog converter; and the operational amplifier 202 adopts an NJM5532 operational amplifier.

[0043] Specifically, in this embodiment, the digital-to-analog converter 201 is used to convert the IIS digital signal processed by the digital signal processing module 3 into an analog signal; the operational amplifier 202 is used to amplify the converted analog signal to the amplitude of the input signal to ensure that the signal is not distorted; the filter 203 is used to filter the signal to be output to remove unnecessary noise or interference; the output terminal 204 is used to connect to an external output device and transmit the output signal to the output device.

[0044] Furthermore, the network module 5 includes at least one communication chip 50 and at least one communication interface 51 . The communication chip 50 and the communication interface 51 correspond one to one. At least one communication interface 51 is connected to the control module 4 through the corresponding communication chip 50 .

[0045] It should be noted that, in the present embodiment, the number of communication chips 50 is three, specifically including RS232 chip 501, RS485 chip 502 and PHY chip 503. In other embodiments, other communication chips can also be set, without too many restrictions here; the number of communication interfaces 51 is three, specifically including DB9 interface 511, 4P Phoenix interface 512 and RJ45 interface 513. In other embodiments, other communication interfaces can also be set, without too many restrictions here; one end of the RS232 chip 501 is connected to the control module 4 through a serial port, and the other end of the RS232 chip 501 is connected to the DB9 interface 511; one end of the RS485 chip 502 is connected to the control module 4 through a serial port, and the other end of the RS485 chip 502 is connected to the 4P Phoenix interface 512; the PHY chip 503 is connected to a 100M wired network through the RMII protocol between the control module 4, and the RJ45 interface 513 is connected to the PHY chip 503 through a network transformer.

[0046] Specifically, in this embodiment, the communication interface 51 is connected to the control module 4 through the corresponding communication chip 50 to transmit relevant control signals or device status information, and at the same time, the mixer device can be connected to the local area network, the Internet of Things, and the Internet to achieve host computer control, Internet of Things connection and Internet access.

[0047] Furthermore, a register 11 is provided between the control module 4 and the digital potentiometer 7 and the phantom power module 6 .

[0048] It should be noted that, in this embodiment, the register 11 adopts a 74HC595 register; there is only one register 11, one end of the control module 4 is connected to the input end of the register 11, and the two output ends of the register 11 are respectively connected to the digital potentiometer 7 and the phantom power module 6. In other embodiments, two registers 11 can also be used for separate control, and no excessive restrictions are made here.

[0049] Specifically, in this embodiment, by setting a register 11 between the control module 4 and the digital potentiometer 7, it is convenient to control the digital potentiometer 7 of the input module 1 to achieve input hardware gain adjustment; by setting a register 11 between the control module 4 and the phantom power module 6, it is convenient to control the register 11 to control the switch of the phantom power module 6.

[0050] Furthermore, at least one input unit 10 adopts one of the first input channel 100 or the second input channel 110, the two input terminals 102 in the first input channel 100 adopt Phoenix input terminals, and the two input terminals 102 in the second input channel 110 adopt Lotus input terminals; the phantom power supply module 6 is respectively connected to the power supply ends of the two input terminals 102 of the first input channel 100, and the output ends of the digital potentiometer 7 are respectively connected to the control ends of the two pre-stage processing circuits 103 of the first input channel 100.

[0051] It should be noted that, in this embodiment, among the seven input units 10, six input units 10 use the first input channel 100, and the remaining input unit 10 uses the second input channel 110. Figure 3 As shown, the fourteen input terminals 102 of the seven input units 10 are Phoenix Input Terminal 1, Phoenix Input Terminal 2, Phoenix Input Terminal 3, Phoenix Input Terminal 4, Phoenix Input Terminal 5, Phoenix Input Terminal 6, Phoenix Input Terminal 7, Phoenix Input Terminal 8, Phoenix Input Terminal 9, Phoenix Input Terminal 10, Phoenix Input Terminal 11, Phoenix Input Terminal 12, Lotus Input Terminal L, and Lotus Input Terminal R. In other embodiments, four, five, or seven input units 10 may also utilize the first input channel 100, and this is not limited here. The phantom power module 6 is connected only to the power supply end of the input terminals 102 in the first input channel 100, and the digital potentiometer 7 is connected only to the pre-stage processing circuit 103 in the first input channel 100.

[0052] Furthermore, at least one output unit 20 adopts one of the first output channel 200 or the second output channel 210, the two output terminals 204 in the first output channel 200 adopt Phoenix output terminals, any one of the two operational amplifiers 202 in the first output channel 200 is connected to a cascade input terminal, and the two output terminals 204 in the second output channel 210 adopt Lotus output terminals.

[0053] It should be noted that, in this embodiment, among the three output units 20, two output units 20 use the first output channel 200, and the remaining output unit 20 uses the second output channel 210. Figure 4 As shown, the six output terminals 204 of the three output units 20 are Phoenix output terminal 1, Phoenix output terminal 2, Phoenix output terminal 3, Phoenix output terminal 4, Lotus output terminal L, and Lotus output terminal R. In other embodiments, one or three output units 20 may also use the first output channel 200, and no further restrictions are made here. At the same time, the cascade input terminal 12 is only connected to one operational amplifier 202, and the cascade input terminal 12 uses a Phoenix port.

[0054] Specifically, in this embodiment, the cascade input terminal 12 is used to facilitate input of cascade signals, thereby realizing cascade connection of multiple devices.

[0055] Working principle: The external audio signal input device inputs the audio signal through the input terminal 102 in the input module 1, and then the pre-stage processing circuit 103 performs gain adjustment, voltage limiting processing and differential adjustment on the audio signal based on the regulation of the digital potentiometer 7, and then converts the processed analog differential signal into an IIS digital signal through the analog-to-digital converter 101 and transmits it to the digital signal processing module 3. After receiving the digital signal, the digital signal processing module 3 performs signal processing on the digital signal, such as delay, phase conversion and noise threshold, and at the same time transmits the processed signal to the digital-to-analog converter 201 of the output module 2. The digital-to-analog converter 201 converts the IIS digital signal processed by the digital signal processing module 3 into an analog signal and transmits it to the operational amplifier 202. The operational amplifier 202 amplifies the converted analog signal to the amplitude of the input signal, and finally connects to the external output device through the output terminal 204 and transmits the output signal to the output device.

[0056] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. An intelligent mixer, characterized in that: The mixer comprises an input module (1), an output module (2), a digital signal processing module (3), a control module (4), a network module (5) and a phantom power module (6), wherein the input module (1) comprises at least one input unit (10), the output module (2) comprises at least one output unit (20), at least one input unit (10) and at least one output module (2) are both connected to the digital signal processing module (3), the digital signal processing module (3) is connected to the control module (4), one end of the phantom power module (6) is connected to the control module (4), a power supply end of at least one input unit (10) is connected to the other end of the phantom power module (6), the network module (5) is connected to the control module (4), the control module (4) is further connected to a digital potentiometer (7), and the control end of at least one input unit (10) is connected to the output end of the digital potentiometer (7).

2. The intelligent mixer according to claim 1, characterized in that: The mixer further comprises a memory (8), an encoding potentiometer (9) and a display device (13), and the memory (8), the encoding potentiometer (9) and the display device (13) are all connected to the control module (4).

3. The intelligent mixer according to claim 1, characterized in that: The input unit (10) comprises an analog-to-digital converter (101), two input terminals (102) and two pre-stage processing circuits (103); the output ends of the two input terminals (102) are respectively connected to the input ends of the two pre-stage processing circuits (103); the output ends of the two pre-stage processing circuits (103) are both connected to the input ends of the digital-to-analog converter (201); and the output end of the digital-to-analog converter (201) is connected to the digital signal processing module (3).

4. The intelligent mixer according to claim 1, characterized in that: The output unit (20) comprises a digital-to-analog converter (201), two operational amplifiers (202), two filters (203) and two output terminals (204); the input end of the digital-to-analog converter (201) is connected to the digital signal processing module (3); the output end of the digital-to-analog converter (201) is respectively connected to the input ends of the two operational amplifiers (202); the output ends of the two operational amplifiers (202) are respectively connected to the input ends of the two filters (203); and the output ends of the two filters (203) are respectively connected to the two output terminals (204).

5. The intelligent mixer according to claim 1, characterized in that: The network module (5) comprises at least one communication chip (50) and at least one communication interface (51), wherein the communication chip (50) and the communication interface (51) correspond one to one, and at least one communication interface (51) is connected to the control module (4) via the corresponding communication chip (50).

6. The intelligent mixer according to claim 1, characterized in that: A register (11) is further provided between the control module (4) and the digital potentiometer (7) and the phantom power module (6).

7. The intelligent mixer according to claim 3, characterized in that: At least one of the input units (10) adopts one of a first input channel (100) and a second input channel (110); the two input terminals (102) in the first input channel (100) adopt Phoenix input terminals, and the two input terminals (102) in the second input channel (110) adopt Lotus input terminals; the phantom power supply module (6) is respectively connected to the power supply ends of the two input terminals (102) of the first input channel (100); and the output ends of the digital potentiometer (7) are respectively connected to the control ends of the two pre-stage processing circuits (103) of the first input channel (100).

8. The intelligent mixer according to claim 4, characterized in that: At least one of the output units (20) uses one of a first output channel (200) and a second output channel (210); two output terminals (204) in the first output channel (200) use Phoenix output terminals; any one of the two operational amplifiers (202) in the first output channel (200) is connected to a cascade input terminal (12); and two output terminals (204) in the second output channel (210) use Lotus output terminals.

9. The intelligent mixer according to claim 5, characterized in that: The communication chip (50) includes an RS232 chip (501), an RS485 chip (502) and a PHY chip (503).

10. The intelligent mixer according to claim 5, characterized in that: The communication interface (51) includes a DB9 interface (511), a 4P Phoenix interface (512) and an RJ45 interface (513).

Images