CN205071293U - Digital signal processor and audio frequency processing apparatus - Google Patents

Abstract

The utility model relates to a digital signal processor comprising: a USB control module, used to transmit a first digital audio signal from an intelligent terminal to an audio processing module; an audio encoding module, used to convert the first analog audio signal from a microphone The second digital audio signal is transmitted to the audio processing module; the control processing module is used to send the audio control signal to the audio processing module according to the button signal; The audio signals are respectively subjected to audio effect processing, and the processed second digital audio signal is transmitted to the smart terminal through the USB control module, and the processed second digital audio signal and the first digital audio signal are subjected to audio mixing processing to obtain a mixed digital audio The signal is output to the audio decoding module; the audio decoding module is used to receive the mixed digital audio signal, convert it into a second analog audio signal and output it to the standard earphone.

Description

A digital signal processor and audio processing device

technical field

The utility model relates to the technical field of audio processing, in particular to a digital signal processor and an audio processing device.

Background technique

The use of smart terminals (mobile phones, tablet computers, etc.) to make karaoke more and more popular has become a mainstream trend of karaoke. Yet existing karaoke utilizing intelligent terminal needs to be by means of special-purpose karaoke earphone or karaoke microphone. Usually, analog audio is used for transmission, effect processing and control, so the audio quality is not high, the transmitted sound is easily disturbed, the audio processing effect is single, and the effect control is not flexible and convenient. In addition, the volume of dedicated karaoke earphones or karaoke microphones cannot be made very small, which is not easy to carry around, and requires built-in batteries and charging, and cannot be used when the batteries are dead.

Utility model content

The purpose of the utility model is to provide a digital signal processor and an audio processing device. The digital signal processor and the audio processing device can implement different audio effect processing on the audio signal, so as to meet the use requirements of different users at the same time. The audio processing device realized by the digital signal processor of the utility model adopts the digital signal mode for transmission and effect processing, the audio quality is high, the processing effect is diversified, the control is flexible and convenient, and the volume is small and can be carried with the mobile phone without any inconvenience. Additional charging is required.

To achieve the above object, the utility model provides a digital signal processor, the data signal processor is a highly integrated chip, the digital signal processor includes: USB control module, audio encoding module, control processing module, audio processing module and an audio decoding module, the USB control module, the audio encoding module, the control processing module and the audio decoding module are respectively electrically connected to the audio processing module, wherein,

The USB control module is used to connect to the smart terminal through a USB bus, and transmit the first digital audio signal from the smart terminal to the audio processing module;

The audio coding module is used to convert the first analog audio signal from the microphone into a second digital audio signal, and transmit the second digital audio signal to the audio processing module, and the microphone is a standard earphone itself. There are microphones;

The control processing module is configured to receive a key signal, and send a sound effect control signal to the audio processing module according to the key signal;

The audio processing module is configured to receive the digital first audio signal and the second digital audio signal, and process the first digital audio signal and the second digital audio signal according to the received sound effect control signal Perform audio effect processing respectively, transmit the second digital audio signal after sound effect processing to the smart terminal through the USB control module, and simultaneously combine the second digital audio signal after sound effect processing with the sound effect processed Perform audio mixing processing on the first digital audio signal to obtain a mixed digital audio signal, and output the mixed digital audio signal to the audio decoding module;

The audio decoding module is configured to receive the mixed digital audio signal, convert the mixed digital audio signal into a second analog audio signal, and output the second analog signal to the standard earphone.

Preferably, the control processing module is specifically configured to receive a key signal, and send different sound effect control signals to the audio processing module according to the type of the key signal;

The audio processing module is specifically configured to perform different audio effect processing on the received first digital audio signal and the second digital audio signal according to different sound effect control signals.

Further preferably, the audio processing module includes: a microphone sound effect processing unit, a music beautification effect processing unit, an original singing suppression effect processing unit, and an audio mixing processing unit, wherein,

The microphone sound effect processing unit is configured to perform sound effect processing on the second digital audio signal according to the sound effect control signal to obtain a third digital audio signal, and transmit the third digital audio signal through the USB control module to the smart terminal, and simultaneously output the third digital audio signal to the audio mixing processing unit;

The music beautification effect processing unit is configured to, when the sound effect control signal is a first sound effect control signal, perform music beautification effect processing on the first digital audio signal according to the first sound effect control signal to obtain a fourth digital audio signal an audio signal, and output the fourth digital audio signal to the audio mixing processing unit, wherein the first sound effect control signal is a sound effect control signal corresponding to a key signal whose type of the key signal is a long press;

The original singing suppression effect processing unit is configured to perform original singing suppression effect processing on the first digital audio signal according to the second sound effect control signal when the sound effect control signal is a second sound effect control signal, to obtain a second Five digital audio signals, and output the fifth digital audio signal to the audio mixing processing unit, wherein the second sound effect control signal is the sound effect control signal corresponding to the key signal whose type of the key signal is a short press ;

The audio mixing processing unit is configured to perform audio mixing processing on the third digital audio signal and the fourth digital audio signal to obtain a mixed digital audio signal, or combine the third digital audio signal and the fourth digital audio signal The five digital audio signals are subjected to audio mixing processing to obtain a mixed digital audio signal.

Preferably, the digital signal processor further includes: a key detection module, configured to detect a key signal of the microphone, and control the sound effect of the first analog audio signal according to the key signal of the microphone.

Further preferably, the digital signal processor further includes: an audio amplification module, configured to amplify the first analog audio signal from the microphone, and output the amplified first analog audio signal to the audio The encoding module is configured to amplify the second analog audio signal input by the audio decoding module, and output the amplified second analog audio signal to the standard earphone.

The utility model also provides an audio processing device, which is characterized in that it includes: an OTG interface plug, a standard earphone interface, control buttons and the digital signal processor described in any one of the above technical solutions, wherein the The plug of the OTG function, the plurality of standard earphone jacks and the control buttons are respectively electrically connected to the digital signal processor,

The plug with an OTG function is used to insert the audio processing device into a smart terminal with an OTG interface, and output the first audio signal from the smart terminal to the digital signal processor;

The plurality of standard earphone jacks are respectively used to insert standard earphones with microphones, and output the second audio signals from the plurality of microphones to the digital signal processor;

The digital signal processor is configured to receive the first audio signal and the second audio signal, and perform audio effect processing and audio processing on the first audio signal and the second audio signal according to the actual needs of users. Mixing processing to obtain a mixed audio signal, outputting the mixed audio signal to the smart terminal through the plug with the OTG function, and simultaneously outputting the mixed audio signal to a plurality of standard earphones with a microphone;

The control button is used to control the digital signal processor to switch between different audio effect processing according to the received button signal.

Based on the above-mentioned technical solution, a digital signal processor and an audio processing device provided by the present invention receive the first digital audio signal from the smart terminal input by the USB control module and the first digital audio signal from the microphone input by the audio encoding module through the audio processing module. The second digital audio signal converted from the first analog audio signal, and the audio effect control signal sent by the control processing module according to the button signal, and the audio effect processing is performed on the first digital audio signal and the second digital audio signal respectively according to the audio effect control signal, The second digital audio signal after the sound effect processing is transmitted to the intelligent terminal through the USB control module, and at the same time, the second digital audio signal after the sound effect processing and the first digital audio signal after the sound effect processing are subjected to audio mixing processing to obtain a mixed Digital audio signal, the mixed digital audio signal is output to the audio decoding module, so that the audio decoding module converts it into a second analog audio signal and outputs it to a standard earphone, so that the audio signal can be processed with different audio effects to simultaneously Meet the needs of different users.

Description of drawings

Fig. 1 is a schematic structural diagram of a digital signal processor provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an audio processing device provided by an embodiment of the present invention;

Fig. 3 is an application scene diagram of an audio processing device provided by an embodiment of the present invention.

detailed description

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

FIG. 1 is a schematic structural diagram of a digital signal processor 100 provided according to an embodiment of the present invention. The digital signal processor 100 shown in Figure 1 is a highly integrated chip, and the digital signal processor 100 includes: a USB control module 110, an audio encoding module 120, a control processing module 130, an audio processing module 140 and an audio decoding module 150, the USB control module 110, the audio encoding module 120, the control processing module 130, and the audio decoding module 150 are respectively electrically connected to the audio processing module 140, wherein,

The USB control module 110 is configured to connect to the smart terminal through a USB bus, and transmit the first digital audio signal from the smart terminal to the audio processing module 140;

The audio encoding module 120 is configured to convert the first analog audio signal from the microphone into a second digital audio signal, and transmit the second digital audio signal to the audio processing module 140, the microphone is a standard earphone own microphone;

The control processing module 130 is configured to receive a button signal, and send a sound effect control signal to the audio processing module 140 according to the button signal;

The audio processing module 140 is configured to receive the first digital audio signal and the second digital audio signal, and respectively process the first digital audio signal and the second digital audio signal according to the sound effect control signal Perform audio effect processing, transmit the second digital audio signal after sound effect processing to the smart terminal through the USB control module, and at the same time combine the second digital audio signal after sound effect processing with the sound effect processed Perform audio mixing processing on the first digital audio signal to obtain a mixed digital audio signal, and output the mixed digital audio signal to the audio decoding module 150;

The audio decoding module 150 is configured to receive the mixed digital audio signal, convert the mixed digital audio signal into a second analog audio signal, and output the second analog signal to the standard earphone.

Specifically, in the embodiment of the present utility model, the USB control module 110 , the audio encoding module 120 , the control processing module 130 and the audio decoding module 150 may be electrically connected to the audio processing module 140 respectively. USB control module 110 is connected with intelligent terminal through USB bus, and transmits the first digital audio signal from intelligent terminal to audio processing module 140; Convert into the second digital audio signal, and transmit the second digital audio signal to the audio processing module 140; the control processing module 130 receives the key signal, and sends the sound effect control signal to the audio processing module 140 according to the key signal; the audio processing module 140 receives The first digital audio signal and the second digital audio signal are digital, and the first digital audio signal and the second digital audio signal are respectively subjected to audio effect processing according to the sound effect control signal, and the second digital audio signal after the sound effect processing is passed through the USB control module Transmit to the smart terminal, and at the same time perform audio mixing processing on the second digital audio signal after the sound effect processing and the first digital audio signal after the sound effect processing to obtain a mixed digital audio signal, and output the mixed digital audio signal to the audio decoding module 150 ; The audio decoding module 150 receives the mixed digital audio signal, converts the mixed digital audio signal into a second analog audio signal, and outputs the second analog signal to a standard earphone.

Therefore, a kind of digital signal processor that the utility model provides, receives the first digital audio signal from the intelligent terminal that the USB control module inputs through the audio processing module and the first analog audio signal from the microphone that the audio coding module inputs is converted into The second digital audio signal, and the sound effect control signal sent by the control processing module according to the button signal, and the first digital audio signal and the second digital audio signal are respectively subjected to audio effect processing according to the sound effect control signal, and the first digital audio signal after the sound effect processing is processed The second digital audio signal is transmitted to the intelligent terminal through the USB control module, and at the same time, the second digital audio signal after the sound effect processing and the first digital audio signal after the sound effect processing are subjected to audio mixing processing to obtain a mixed digital audio signal. The audio signal is output to the audio decoding module, so that the audio decoding module converts it into a second analog audio signal and outputs it to a standard earphone, so that the audio signal can be processed with different audio effects to meet the needs of different users at the same time.

Preferably, as an embodiment of the present invention, the control processing module 130 is specifically configured to receive a key signal, and send different sound effect control signals to the audio processing module 140 according to the type of the key signal;

The audio processing module 140 is specifically configured to perform different audio effect processing on the received first digital audio signal and the second digital audio signal according to different sound effect control signals.

Specifically, in the embodiment of the present utility model, the audio processing module 140 may include: a microphone sound effect processing unit 141, a music beautification effect processing unit 142, an original singing suppression effect processing unit 143, and an audio mixing processing unit 144, wherein,

The microphone sound effect processing unit 141 is configured to perform sound effect processing on the second digital audio signal according to the sound effect control signal to obtain a third digital audio signal, and pass the third digital audio signal through the USB control module transmit to the smart terminal, and simultaneously output the third digital audio signal to the audio mixing processing unit 144;

The music beautification effect processing unit 142 is configured to perform music beautification effect processing on the first digital audio signal according to the first sound effect control signal when the sound effect control signal is a first sound effect control signal, to obtain a fourth digital audio signal, and output the fourth digital audio signal to the audio mixing processing unit 144, wherein the first sound effect control signal is the sound effect control signal corresponding to the key signal whose type of the key signal is a long press ;

The original singing suppression effect processing unit 143 is configured to perform original singing suppression effect processing on the first digital audio signal according to the second sound effect control signal when the sound effect control signal is a second sound effect control signal, to obtain The fifth digital audio signal, and output the fifth digital audio signal to the audio mixing processing unit 144, wherein the second sound effect control signal is the sound effect corresponding to the key signal whose type of the key signal is a short press control signal;

The audio mixing processing unit 144 is configured to perform audio mixing processing on the third digital audio signal and the fourth digital audio signal to obtain a mixed digital audio signal, or combine the third digital audio signal and the The fifth digital audio signal is subjected to audio mixing processing to obtain a mixed digital audio signal.

For example: in the present utility model, the type of the key signal received by the control processing module 130 is a long press, that is, a key signal formed by pressing for a long time. The unit 142 sends the first sound effect control signal corresponding to the key signal whose type is a long press, and the music beautification effect processing unit 142 performs music beautification effect processing on the first digital audio signal according to the first sound effect control signal to obtain a fourth For the digital audio signal, the audio mixing processing unit 144 can perform audio mixing processing on the fourth digital audio signal and the third digital audio signal obtained by performing sound effect processing on the second digital audio signal by the microphone sound effect processing unit 141 according to the sound effect control signal, to obtain a mixed digital audio signal, and output the mixed digital audio signal to the audio decoding module 150 .

Alternatively, the type of the key signal received by the control processing module 130 is a short press, that is, a key signal formed by pressing for a short time. The type is the second sound effect control signal corresponding to the button signal of short press, the original singing suppression effect processing unit 143 performs the original singing suppression effect processing on the first digital audio signal according to the second sound effect control signal, and obtains the fifth digital audio signal, The audio mixing processing unit 144 may perform audio mixing processing on the fifth digital audio signal and the third digital audio signal obtained by performing sound effect processing on the second digital audio signal by the microphone sound effect processing unit 141 according to the sound effect control signal, to obtain a mixed digital audio signal, Output the mixed digital audio signal to the audio decoding module 150 .

It should be understood that in the embodiment of the present invention, the long press and short press can be set according to the actual situation, but this embodiment of the present invention does not make any limitation thereto.

Preferably, as another embodiment of the present invention, the digital signal processor 100 further includes: a key detection module 160, configured to detect a key signal of the microphone, and control the second key signal according to the key signal of the microphone. A sound effect for an analog audio signal.

Specifically, in the embodiment of the present utility model, the button detection module 160 can adjust the sound effect of the first analog audio signal from the microphone according to the detected button signal of the microphone on the standard earphone, for example: the button signal of the microphone can be used to adjust the sound effect. Adjust the volume of the first analog audio signal and so on.

Preferably, as another embodiment of the present invention, the digital signal processor 100 further includes: an audio amplification module 170, configured to amplify the first analog audio signal from the microphone, and convert the amplified The first analog audio signal is output to the audio encoding module, and is used to amplify the second analog audio signal input by the audio decoding module, and output the amplified second analog audio signal to the standard earphone.

It should be understood that, in the embodiment of the present utility model, the audio amplification module 170 may be two separate audio amplification units, which are respectively used to amplify the first analog audio signal from the microphone and the input signal from the audio decoding module. the second analog audio signal, and output the amplified first analog audio signal and the second analog audio signal to the audio coding module and the standard earphone respectively. Alternatively, the audio amplification module 170 can also be an integrated audio amplification unit, which can amplify the first analog audio signal from the microphone, or amplify the second analog audio signal input by the audio decoding module, The embodiment of the present utility model does not make any limitation on this.

Fig. 2 is a schematic structural diagram of an audio processing device 200 provided according to an embodiment of the present invention. Audio processing device 200 as shown in Figure 2 comprises: OTG interface plug 210, a plurality of standard earphone jacks 220, control button 230 and digital signal processor 100 as shown in Figure 1, wherein, described plug 210 with OTG function , the plurality of standard earphone jacks 220 and the control buttons 230 are electrically connected to the digital signal processor 100,

The plug 210 with OTG function is used to insert the audio processing device 200 into a smart terminal with an OTG interface, and output the first audio signal from the smart terminal to the digital signal processor 100;

The plurality of standard earphone jacks 220 are respectively used to insert standard earphones with microphones, and output the second audio signals from the plurality of microphones to the digital signal processor 100;

The digital signal processor 100 is configured to receive the first audio signal and the second audio signal, and perform audio effect processing and processing on the first audio signal and the second audio signal according to the actual needs of users. Audio mixing processing to obtain a mixed audio signal, output the mixed audio signal to the smart terminal through the plug with the OTG function, and simultaneously output the mixed audio signal to a plurality of standard earphones with a microphone;

The control button 230 is used for controlling the digital signal processor 100 to switch between different audio effect processing according to the received button signal.

Specifically, in the embodiment of the present utility model, the plug 210 with OTG function, a plurality of standard earphone jacks 220 and the control buttons 230 can be electrically connected with the digital signal processor 100 respectively, and the plug 210 with OTG function connects the audio processing device 200 Insert in the smart terminal with OTG interface, and output the first audio signal from the smart terminal to the digital signal processor 100; A plurality of standard earphone sockets 220 are respectively inserted into standard earphones with microphones, and output the first audio signal from the plurality of microphones The two audio signals are output to the digital signal processor 100; the digital signal processor 100 receives the first audio signal and the second audio signal, and performs audio effect processing and audio mixing on the first audio signal and the second audio signal according to the actual needs of the user Processing to obtain a mixed audio signal, the mixed audio signal can be output to the smart terminal through the plug 210 with OTG function, for the smart terminal to store or publish to the outside world, and the mixed audio signal can also be output to multiple standard earphones with microphones respectively; The control button 230 controls the digital signal processor 100 to switch between different audio effect processing according to the received button signal.

Therefore, in the audio processing device provided by the present invention, the audio processing device is inserted into an intelligent terminal with an OTG interface through a plug having an OTG function, and the first audio signal from the intelligent terminal is output to a digital signal processor, A plurality of standard earphone jacks are respectively inserted into standard earphones with microphones, and the second audio signals from the plurality of microphones are output to the digital signal processor, and the digital signal processor is controlled by the key signal received by the control key according to the actual needs of the user , performing audio effect processing and audio mixing processing on the first audio signal and the second audio signal to obtain a mixed audio signal, outputting the mixed audio signal to an intelligent terminal through a plug with an OTG function, and simultaneously outputting the mixed audio signal to multiple The above-mentioned standard headset with a microphone can meet the needs of different users at the same time.

In addition, because the audio processing device provided by the utility model can be used together with an intelligent terminal with an OTG interface function, and the plug with an OTG function can be connected to the intelligent terminal through the charging interface of the intelligent terminal, so that the audio processing device It can be powered directly from the OTG interface, and the power consumption of the audio processing device is very low, so no external power supply or built-in power supply is required, and the power consumption of the smart terminal will not be significantly increased, which will affect the normal use of the smart terminal.

At the same time, since the digital signal processor included in the audio processing device provided by the utility model is a highly integrated chip, the physical product of the audio processing device can be small in size and easy to carry.

It should be understood that, in the embodiment of the present invention, the plurality of standard earphone jacks 120 may be common 3.5mm standard earphone jacks, but this embodiment of the present invention does not make any limitation thereto.

It should be noted that, in the embodiment of the present utility model, the control button 230 controls the digital signal processor 100 to switch between different audio effect processing according to the received button signal, which is the same as the control processing included in FIG. 1 described above. The module 130 sends different sound effect control signals to the audio processing module 140 according to the type of the key signal, and the audio processing module 140 performs the processing on the received first digital audio signal and the second digital audio signal according to the different sound effect control signals. The process of performing different audio effects on the audio signals is similar, and will not be repeated here for the sake of brief description.

The specific implementation manners described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. Within the protection scope of the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (6)

1. A digital signal processor, characterized in that, the digital signal processor is a highly integrated chip, and the digital signal processor comprises: a USB control module, an audio encoding module, a control processing module, an audio processing module and An audio decoding module, the USB control module, the audio encoding module, the control processing module and the audio decoding module are respectively electrically connected to the audio processing module, wherein, The USB control module is used to connect to the smart terminal through a USB bus, and transmit the first digital audio signal from the smart terminal to the audio processing module; The audio coding module is used to convert the first analog audio signal from the microphone into a second digital audio signal, and transmit the second digital audio signal to the audio processing module, and the microphone is a standard earphone itself. There are microphones; The control processing module is configured to receive a key signal, and send a sound effect control signal to the audio processing module according to the key signal; The audio processing module is configured to receive the digital first audio signal and the second digital audio signal, and process the first digital audio signal and the second digital audio signal according to the received sound effect control signal Perform audio effect processing respectively, transmit the second digital audio signal after sound effect processing to the smart terminal through the USB control module, and simultaneously combine the second digital audio signal after sound effect processing with the sound effect processed Perform audio mixing processing on the first digital audio signal to obtain a mixed digital audio signal, and output the mixed digital audio signal to the audio decoding module; The audio decoding module is configured to receive the mixed digital audio signal, convert the mixed digital audio signal into a second analog audio signal, and output the second analog signal to the standard earphone. 2. The digital signal processor according to claim 1, wherein the control processing module is specifically configured to receive a key signal, and send different sound effect control signals to the audio processing module according to the type of the key signal ; The audio processing module is specifically configured to perform different audio effect processing on the received first digital audio signal and the second digital audio signal according to different sound effect control signals. 3. The digital signal processor according to claim 2, wherein the audio processing module comprises: a microphone sound effect processing unit, a music beautification effect processing unit, an original singing suppression effect processing unit and an audio mixing processing unit, wherein, The microphone sound effect processing unit is configured to perform sound effect processing on the second digital audio signal according to the sound effect control signal to obtain a third digital audio signal, and transmit the third digital audio signal through the USB control module to the smart terminal, and simultaneously output the third digital audio signal to the audio mixing processing unit; The music beautification effect processing unit is configured to, when the sound effect control signal is a first sound effect control signal, perform music beautification effect processing on the first digital audio signal according to the first sound effect control signal to obtain a fourth digital audio signal an audio signal, and output the fourth digital audio signal to the audio mixing processing unit, wherein the first sound effect control signal is a sound effect control signal corresponding to a key signal whose type of the key signal is a long press; The original singing suppression effect processing unit is configured to perform original singing suppression effect processing on the first digital audio signal according to the second sound effect control signal when the sound effect control signal is a second sound effect control signal, to obtain a second Five digital audio signals, and output the fifth digital audio signal to the audio mixing processing unit, wherein the second sound effect control signal is the sound effect control signal corresponding to the key signal whose type of the key signal is a short press ; The audio mixing processing unit is configured to perform audio mixing processing on the third digital audio signal and the fourth digital audio signal to obtain a mixed digital audio signal, or combine the third digital audio signal and the fourth digital audio signal The five digital audio signals are subjected to audio mixing processing to obtain a mixed digital audio signal. 4. The digital signal processor according to any one of claims 1 to 3, wherein the digital signal processor further comprises: a button detection module, configured to detect the button signal of the microphone, and according to the The key signal of the microphone controls the sound effect of the first analog audio signal. 5. The digital signal processor according to claim 4, wherein the digital signal processor further comprises: an audio amplification module, configured to amplify the first analog audio signal from the microphone, and amplify the The first analog audio signal is output to the audio encoding module, and is used to amplify the second analog audio signal input by the audio decoding module, and output the amplified second analog audio signal to The standard headset. 6. An audio processing device, characterized in that it comprises: an OTG interface plug, a plurality of standard earphone jacks, control buttons and the digital signal processor according to any one of claims 1-5, wherein said The plug of the OTG function, the plurality of standard earphone jacks and the control buttons are respectively electrically connected to the digital signal processor, The plug with an OTG function is used to insert the audio processing device into a smart terminal with an OTG interface, and output the first audio signal from the smart terminal to the digital signal processor; The plurality of standard earphone jacks are respectively used to insert standard earphones with microphones, and output the second audio signals from the plurality of microphones to the digital signal processor; The digital signal processor is configured to receive the first audio signal and the second audio signal, and perform audio effect processing and audio processing on the first audio signal and the second audio signal according to the actual needs of users. Mixing processing to obtain a mixed audio signal, outputting the mixed audio signal to the smart terminal through the plug with the OTG function, and simultaneously outputting the mixed audio signal to a plurality of standard earphones with a microphone; The control button is used to control the digital signal processor to switch between different audio effect processing according to the received button signal.